merge a big part of the unofficial gigabeat cvs back. Includes working bootloader and rockbox with audio.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11850 a1c6a512-1295-4272-9138-f99709370657

31 files changed, 1509 insertions, 199 deletions

diff --git a/apps/plugins/plugin.lds b/apps/plugins/plugin.lds
index f27733a185..52a5cc32a5 100644
--- a/apps/plugins/plugin.lds
+++ b/apps/plugins/plugin.lds
@@ -36,6 +36,11 @@ OUTPUT_FORMAT(elf32-sh)
 #define DRAMORIG 0xc00000 + STUBOFFSET
 #define IRAMORIG 0x407000
 #define IRAMSIZE 0x9000
+#elif CONFIG_CPU == S3C2440
+#define DRAMORIG 0x100 + STUBOFFSET
+#define IRAMORIG DRAMORIG
+#define IRAMSIZE 4K
+#define IRAM DRAM
 #else
 #define DRAMORIG 0x09000000 + STUBOFFSET
 #endif
@@ -73,7 +78,7 @@ SECTIONS
     .text :
     {
         *(.text*)
-#if defined(CPU_PP) || (CONFIG_CPU==PNX0101)
+#ifdef CPU_ARM
         *(.glue_7)
         *(.glue_7t)
 #endif
diff --git a/bootloader/gigabeat.c b/bootloader/gigabeat.c
index c04042cead..62c31310ae 100644
--- a/bootloader/gigabeat.c
+++ b/bootloader/gigabeat.c
@@ -17,12 +17,133 @@
 #include "panic.h"
 #include "power.h"
 #include "file.h"
+#include "button-target.h"
+
+void map_memory(void);
+
+int line = 0;
 
 char version[] = APPSVERSION;
 
-void go_usb_mode(void) {
+/* This section allows you to toggle bits of any memory location  */
+/* Touchpad to move around the bits. Select to toggle the red bit */
+typedef struct {
+    unsigned int address;
+    char    *desc;
+} memlocation_struct;
+
+/* Just add any address and descriptions here */
+/* Must finish with 0xFFFFFFFF                */
+const memlocation_struct memlocations[] = {
+/* Address    Description */
+{ 0x56000000, "GPACON" },
+{ 0x56000004, "GPADAT" },
+{ 0x56000010, "GPBCON" },
+{ 0x56000014, "GPBDAT" },
+{ 0x56000020, "GPCCON" },
+{ 0x56000024, "GPCDAT" },
+{ 0x56000030, "GPDCON" },
+{ 0x56000034, "GPDDAT" },
+{ 0x56000040, "GPECON" },
+{ 0x56000044, "GPEDAT" },
+{ 0x56000050, "GPFCON" },
+{ 0x56000054, "GPFDAT" },
+{ 0x56000060, "GPGCON" },
+{ 0x56000064, "GPGDAT" },
+{ 0x56000070, "GPHCON" },
+{ 0x56000074, "GPHDAT" },
+{ 0xFFFFFFFF, 0 }
+};
+
+void memdump(void)
+{
+    int i, j;
+    int current=0, bit=0;
+    char * bitval;
+    int data;
+    char tmp[40];
+
+    while(1) {
+        i = 0;
+
+        while(memlocations[i].address != 0xFFFFFFFF) {
+
+            data = *(volatile int *)memlocations[i].address;
+
+            snprintf(tmp, sizeof(tmp), "%s %s 0x%08X", 
+                 (i==current) ? "*" : " ", 
+                 memlocations[i].desc,
+                 data);
+            lcd_puts(0, i*2+5, tmp);
+
+            /* print out in binary, current bit in red */
+            for (j=31; j>=0; j--) {
+                if ((bit == j) && (current == i))
+                    lcd_set_foreground(LCD_RGBPACK(255,0,0));
+                lcd_puts((31-j) + ((31-j) / 8), i*2+6, (data & (1 << j)) ? "1" : "0" );
+                lcd_set_foreground(LCD_RGBPACK(0,0,0));
+            }
+
+            i++;
+        }
+
+        data = *(volatile int *)memlocations[current].address;
+        bitval = (data & (1 << bit)) ? "1" : "0";
+        snprintf(tmp, sizeof(tmp), "%s bit %ld = %s", memlocations[current].desc, bit, bitval);
+        lcd_puts(0, (i*2)+7, tmp);
+
+        lcd_update();
+
+        /* touchpad controls */
+
+        /* Up */
+        if (GPJDAT & 0x01) {
+            if (current > 0)
+                current--;
+            while(GPJDAT & 0x01);
+        }
+
+        /* Down */
+        if (GPJDAT & 0x40) {
+            if (current < (i-1))
+                current++;
+            while(GPJDAT & 0x40);
+        }
+
+        /* Left */
+        if (GPJDAT & 0x80) {
+            if (bit < 31)
+                bit++;
+            while(GPJDAT & 0x80);
+        }
+
+        /* Right */
+        if (GPJDAT & 0x1000) {
+            if (bit > 0)
+                bit--;
+            while(GPJDAT & 0x1000);
+        }
+
+        /* Centre - Toggle Bit */
+        if (GPJDAT & 0x08) {
+            data = *(volatile int *)memlocations[current].address;
+            data = data ^ (1 << bit);
+            *(volatile int *)memlocations[current].address = data;
+            while(GPJDAT & 0x08);
+        }
+
+        /* Bail out if the power button is pressed */
+        if (GPGDAT & 1) {
+            break;
+        }
+    }
+}
+
+
+static void go_usb_mode(void) {
   /* Drop into USB mode.  This does not check for disconnection. */
 
+
     int i;
 
     GPBDAT &= 0x7EF;
@@ -34,17 +155,160 @@ void go_usb_mode(void) {
     for (i = 0; i < 10000000; i++) {continue;}
 
     GPBCON &= 0x2FFCFF;
-    GPBDAT |= 1<<5; 
+    GPBDAT |= 1<<5;
     GPBDAT |= 1<<6;
 }
 
+
+/* Restores a factory kernel/bootloader from a known location                   */
+/* Restores the FWIMG01.DAT file back in the case of a bootloader failure       */
+/* The factory or "good" bootloader must be in /GBSYSTEM/FWIMG/FWIMG01.DAT.ORIG */
+/* Returns non-zero on failure */
+int restore_fwimg01dat(void)
+{
+    int orig_file = 0, dest_file = 0;
+    int size = 0, size_read;
+    char buf[256];
+    char lcd_buf[64];
+
+    orig_file = open("/GBSYSTEM/FWIMG/FWIMG01.DAT.ORIG", O_RDONLY);
+    if (orig_file < 0) {
+        /* Couldn't open source file */
+        lcd_puts(0, line++, "Couldn't open FWIMG01.DAT.ORIG for reading");
+        lcd_update();
+        return(1);
+    }
+
+    lcd_puts(0, line++, "FWIMG01.DAT.ORIG opened for reading");
+    lcd_update();
+
+    dest_file = open("/GBSYSTEM/FWIMG/FWIMG01.DAT", O_RDWR);
+    if (dest_file < 0) {
+        /* Couldn't open destination file */
+        lcd_puts(0, line++, "Couldn't open FWIMG01.DAT.ORIG for writing");
+        lcd_update();
+        close(orig_file);
+        return(2);
+    }
+
+    lcd_puts(0, line++, "FWIMG01.DAT opened for writing");
+    lcd_update();
+
+    do {
+        /* Copy in chunks */
+        size_read = read(orig_file, buf, sizeof(buf));
+        if (size_read != write(dest_file, buf, size_read)) {
+            close(orig_file);
+            close(dest_file);
+            return(3);
+        }
+        size += size_read;
+
+    } while (size_read > 0);
+
+    close(orig_file);
+    close(dest_file);
+
+    snprintf(lcd_buf, sizeof(lcd_buf), "Finished copying %ld bytes from", size);
+    lcd_puts(0, line++, lcd_buf);
+    lcd_puts(0, line++, "FWIMG01.DAT.ORIG to FWIMG01.DAT");
+
+    return(0);
+}
+
+
+int load_rockbox(const char* file_name, unsigned char* buf, int buffer_size)
+{
+    int fd;
+    int rc;
+    int len;
+    char str[256];
+    //unsigned long chksum;
+    //char model[5];
+    //unsigned long sum;
+    //int i;
+    //char str[80];
+
+    fd = open("/.rockbox/" BOOTFILE, O_RDONLY);
+    if(fd < 0)
+    {
+        fd = open("/" BOOTFILE, O_RDONLY);
+        if(fd < 0)
+            return -1;
+    }
+    fd = open(file_name, O_RDONLY);
+    if(fd < 0)
+        return -2;
+
+    len = filesize(fd);
+
+    if (len > buffer_size) {
+        snprintf(str, sizeof(str), "len: %d buf: %d", len, buffer_size);
+        lcd_puts(0, line++, str);
+        lcd_update();
+        return -6;
+    }
+
+    /*lseek(fd, FIRMWARE_OFFSET_FILE_CRC, SEEK_SET);
+
+    rc = read(fd, &chksum, 4);
+    chksum=betoh32(chksum);*/ /* Rockbox checksums are big-endian */
+    /*if(rc < 4)
+        return -2;
+
+    rc = read(fd, model, 4);
+    if(rc < 4)
+        return -3;
+
+    model[4] = 0;
+
+    snprintf(str, 80, "Model: %s", model);
+    lcd_puts(0, line++, str);
+    snprintf(str, 80, "Checksum: %x", chksum);
+    lcd_puts(0, line++, str);
+    lcd_update();
+
+    lseek(fd, FIRMWARE_OFFSET_FILE_DATA, SEEK_SET);
+*/
+
+    rc = read(fd, buf, len);
+    if(rc < len) {
+        snprintf(str, sizeof(str), "len: %d rc: %d", len, rc);
+       lcd_puts(0, line++, str);
+        lcd_update();
+        return -4;
+    }
+
+    close(fd);
+
+    /*sum = MODEL_NUMBER;
+
+    for(i = 0;i < len;i++) {
+        sum += buf[i];
+    }
+
+    snprintf(str, 80, "Sum: %x", sum);
+    lcd_puts(0, line++, str);
+    lcd_update();
+
+    if(sum != chksum)
+    return -5;*/
+
+    return len;
+}
+
 void * main(void)
 {
-    int line = 0, i;
+    int i;
     char buf[256];
     struct partinfo* pinfo;
     unsigned short* identify_info;
-    int testfile;
+    //int testfile;
+    unsigned char* loadbuffer;
+    int buffer_size;
+    bool load_original = false;
+    int rc;
+    int(*kernel_entry)(void);
 
     lcd_init();
     lcd_setfont(FONT_SYSFIXED);
@@ -57,7 +321,10 @@ void * main(void)
 */
 
     lcd_puts(0, line++, "Hold MENU when booting for rescue mode.");
+    lcd_puts(0, line++, "  \"VOL+\" button to restore original kernel");
+    lcd_puts(0, line++, "  \"A\" button to load original firmware");
     lcd_update();
+    sleep(1*HZ);
 
     /* hold MENU to enter rescue mode */
     if (GPGDAT & 2)  {
@@ -67,12 +334,44 @@ void * main(void)
         while(1);
     }
 
+    sleep(5*HZ);
+
+    if(GPGDAT & 0x10) {
+        load_original = true;
+        lcd_puts(0, line++, "Loading original firmware...");
+        lcd_update();
+     }
+
     i = ata_init();
     i = disk_mount_all();
 
     snprintf(buf, sizeof(buf), "disk_mount_all: %d", i);
     lcd_puts(0, line++, buf);
 
+    /* hold VOL+ to enter rescue mode to copy old image */
+    /* needs to be after ata_init and disk_mount_all    */
+    if (GPGDAT & 4)  {
+
+        /* Try to restore the original kernel/bootloader if a copy is found */
+        lcd_puts(0, line++, "Restoring FWIMG01.DAT...");
+        lcd_update();
+
+        if (!restore_fwimg01dat()) {
+            lcd_puts(0, line++, "Restoring FWIMG01.DAT successful.");
+        } else {
+            lcd_puts(0, line++, "Restoring FWIMG01.DAT failed.");
+        }
+
+        lcd_puts(0, line++, "Now power cycle to boot original");
+        lcd_update();
+        while(1);
+    }
+
+    /* Memory dump mode if Vol- pressed */
+    if (GPGDAT & 8) {
+        memdump();
+    }
+
     identify_info = ata_get_identify();
 
     for (i=0; i < 20; i++)
@@ -96,16 +395,68 @@ void * main(void)
     lcd_puts(0, line++, buf);
 
     pinfo = disk_partinfo(0);
-    snprintf(buf, sizeof(buf), "Partition 0: 0x%02x %ld MB", 
+    snprintf(buf, sizeof(buf), "Partition 0: 0x%02x %ld MB",
                   pinfo->type, pinfo->size / 2048);
     lcd_puts(0, line++, buf);
+    lcd_update();
+
+    /* Load original firmware */
+    if(load_original) {
+        loadbuffer = (unsigned char*)0x30008000;
+        buffer_size =(unsigned char*)0x31000000 - loadbuffer;
+        rc = load_rockbox("/rockbox.gigabeat", loadbuffer, buffer_size);
+        if (rc < 0) {
+            lcd_puts(0, line++, "failed to load original firmware. Loading rockbox");
+            lcd_update();
+            sleep(2*HZ);
+            goto load_rockbox;
+        }
 
-    testfile = open("/boottest.txt", O_WRONLY|O_CREAT|O_TRUNC);
-    write(testfile, "It works!", 9);
-    close(testfile);
+        snprintf(buf, sizeof(buf), "Loaded: %d", rc);
+        lcd_puts(0, line++, buf);
+        lcd_update();
+        sleep(2*HZ);
+
+
+        (*((int*)0x7000000)) = 333;
+        rc = *((int*)0x7000000+0x8000000);
+        snprintf(buf, sizeof(buf), "Bank0 mem test: %d", rc);
+        lcd_puts(0, line++, buf);
+        lcd_update();
+        sleep(3*HZ);
+
+        lcd_puts(0, line++, "Woops, should not return from firmware!");
+        lcd_update();
+        goto usb;
+    }
 
+load_rockbox:
+    map_memory();
+    lcd_puts(0, line, "Loading Rockbox...");
     lcd_update();
+    sleep(HZ*4);
+
+    // TODO: read those values from somwhere
+    loadbuffer = (unsigned char*) 0x100;
+    buffer_size = (unsigned char*)0x400000 - loadbuffer;
+    rc=load_rockbox("/rockbox.gigabeat", loadbuffer, buffer_size);
+    if (rc < 0) {
+        snprintf(buf, sizeof(buf), "Rockbox error: %d",rc);
+        lcd_puts(0, line++, buf);
+        lcd_update();
+    } else {
+        lcd_puts(0, line++, "Rockbox loaded.");
+        lcd_update();
+        kernel_entry = (void*)0x100;
+        rc = kernel_entry();
+        snprintf(buf, sizeof(buf), "Woops, should not return from firmware: %d", rc);
+        lcd_puts(0, line++, buf);
+        lcd_update();
+        goto usb;
+    }
+
 
+usb:
     /* now wait in USB mode so the bootloader can be updated */
     go_usb_mode();
     while(1);
diff --git a/firmware/SOURCES b/firmware/SOURCES
index 6a4f172e47..4f8e531a2e 100644
--- a/firmware/SOURCES
+++ b/firmware/SOURCES
@@ -136,6 +136,8 @@ drivers/rtc/rtc_pcf50606.c
 drivers/rtc/rtc_pcf50605.c
 #elif (CONFIG_RTC == RTC_E8564)
 drivers/rtc/rtc_e8564.c
+#elif (CONFIG_RTC == RTC_S3C2440)
+drivers/rtc/rtc_s3c2440.c
 #endif /* (CONFIG_RTC == RTC_) */
 #endif /* SIMULATOR */
 
@@ -447,6 +449,12 @@ target/arm/gigabeat/meg-fx/power-meg-fx.c
 target/arm/gigabeat/meg-fx/sc606-meg-fx.c
 target/arm/gigabeat/meg-fx/usb-meg-fx.c
 target/arm/gigabeat/meg-fx/wmcodec-meg-fx.c
+target/arm/gigabeat/meg-fx/dma_start.c
+target/arm/gigabeat/meg-fx/system-meg-fx.c
+target/arm/gigabeat/meg-fx/mmu-meg-fx.c
+#ifndef BOOTLOADER
+target/arm/gigabeat/meg-fx/pcm-meg-fx.c
+#endif
 #endif /* SIMULATOR */
 #endif /* GIGABEAT_F */
 
diff --git a/firmware/app.lds b/firmware/app.lds
index 965d7950af..1053437106 100644
--- a/firmware/app.lds
+++ b/firmware/app.lds
@@ -45,9 +45,10 @@ INPUT(target/sh/crt0.o)
 #define IRAMORIG 0x400000
 #define IRAMSIZE 0x7000
 #elif CONFIG_CPU==S3C2440
-#define DRAMORIG 0x30000000 + STUBOFFSET
-#define IRAMORIG 0x40000000
+#define DRAMORIG 0x100 + STUBOFFSET
+#define IRAMORIG DRAMORIG
 #define IRAMSIZE 4K
+#define IRAM DRAM
 #else
 #define DRAMORIG 0x09000000 + STUBOFFSET
 #define IRAMORIG 0x0f000000
@@ -63,7 +64,9 @@ INPUT(target/sh/crt0.o)
 MEMORY
 {
    DRAM : ORIGIN = DRAMORIG, LENGTH = DRAMSIZE
+#if CONFIG_CPU != S3C2440
    IRAM : ORIGIN = IRAMORIG, LENGTH = IRAMSIZE
+#endif
 #if CONFIG_CPU==PNX0101
    IRAM0 : ORIGIN = 0x0, LENGTH = IRAMSIZE
 #endif
@@ -146,6 +149,8 @@ SECTIONS
 
 #if CONFIG_CPU==PNX0101
     .iram IRAMORIG + SIZEOF(.vectors) :
+#elif CONFIG_CPU==S3C2440
+    .iram :
 #else
     .iram IRAMORIG :
 #endif
@@ -200,7 +205,7 @@ SECTIONS
 
 #if defined(CPU_COLDFIRE)
     .bss ADDR(.data) + SIZEOF(.data) + SIZEOF(.iram):
-#elif defined(CPU_ARM)
+#elif defined(CPU_ARM) && CONFIG_CPU != S3C2440
     .bss ADDR(.data) + SIZEOF(.data) + SIZEOF(.iram) + SIZEOF(.vectors):
 #else
     .bss :
diff --git a/firmware/boot.lds b/firmware/boot.lds
index 6c307bd4de..a8c8947f95 100644
--- a/firmware/boot.lds
+++ b/firmware/boot.lds
@@ -119,7 +119,7 @@ SECTIONS
 }
 #elif (CONFIG_CPU==S3C2440)
 {
-  . = DRAMORIG + 0x8000;
+  . = DRAMORIG + 0x1000000;
   .text : {
     *(.init.text)
     *(.text)
diff --git a/firmware/export/config-gigabeat.h b/firmware/export/config-gigabeat.h
index ea72c348ea..b458a0eccd 100644
--- a/firmware/export/config-gigabeat.h
+++ b/firmware/export/config-gigabeat.h
@@ -14,6 +14,12 @@
 /* define this if you have a colour LCD */
 #define HAVE_LCD_COLOR 1
 
+/* define this if you have access to the quickscreen */
+#define HAVE_QUICKSCREEN
+
+/* define this if you have access to the pitchscreen */
+#define HAVE_PITCHSCREEN
+
 /* define this if you would like tagcache to build on this target */
 #define HAVE_TAGCACHE
 
@@ -30,14 +36,24 @@
 #define CONFIG_CODEC SWCODEC
 
 /* define this if you have a real-time clock */
-
-#if 0 /* TODO */
 #define CONFIG_RTC RTC_S3C2440
-#endif
+
+/* define this if the unit can be powered or charged via USB */
+#define HAVE_USB_POWER
 
 /* Define this for LCD backlight available */
 #define CONFIG_BACKLIGHT BL_GIGABEAT /* port controlled PWM */
 
+#define HAVE_BACKLIGHT_BRIGHTNESS
+
+/* Main LCD backlight brightness range and defaults */
+#define MIN_BRIGHTNESS_SETTING          0   /* 0.5 mA */
+#define MIN_ACTIVE_BRIGHTNESS_SETTING   16  /* lowest active brightness */
+#define MAX_DIM_BRIGHTNESS_SETTING      15  /* highest 'dimness' */
+#define MAX_BRIGHTNESS_SETTING          63  /* 32 mA */
+#define DEFAULT_BRIGHTNESS_SETTING      39  /* 20 mA */
+#define DEFAULT_DIMNESS_SETTING          9  /* 5 mA */
+
 /* Define this if you have a software controlled poweroff */
 #define HAVE_SW_POWEROFF
 
@@ -54,23 +70,27 @@
 
 #ifndef SIMULATOR
 
+/* The LCD on a Gigabeat is 240x320 - it is portrait */
+#define HAVE_PORTRAIT_LCD
+
 /* Define this if you have a Motorola SCF5249 */
 #define CONFIG_CPU S3C2440
 
 /* Define this if you want to use coldfire's i2c interface */
 #define CONFIG_I2C I2C_S3C2440
 
-/* Type of mobile power */
-#define CONFIG_BATTERY BATT_LIPOL1300
-#define BATTERY_CAPACITY_MIN 1300 /* min. capacity selectable */
-#define BATTERY_CAPACITY_MAX 3200 /* max. capacity selectable */
-#define BATTERY_CAPACITY_INC 50   /* capacity increment */
-#define BATTERY_TYPES_COUNT  1    /* only one type */
+/* Type of mobile power - check this out */
+#define CONFIG_BATTERY BATT_LIION830    /* could change this later */
+#define BATTERY_CAPACITY_MIN 750        /* min. capacity selectable */
+#define BATTERY_CAPACITY_MAX 850        /* max. capacity selectable */
+#define BATTERY_CAPACITY_INC 25         /* capacity increment */
+#define BATTERY_TYPES_COUNT  1          /* only one type */
 
-#define BATTERY_SCALE_FACTOR 6852 /* FIX: this value is picked at random */
+/* ADC[0] is (530) at discharge and 625 at full charge */
+#define BATTERY_SCALE_FACTOR 6450 
 
-/* Hardware controlled charging? FIXME */
-#define CONFIG_CHARGING CHARGING_SIMPLE
+/* Hardware controlled charging with monitoring */
+#define CONFIG_CHARGING CHARGING_MONITOR
 
 /* define this if the hardware can be powered off while charging */
 #define HAVE_POWEROFF_WHILE_CHARGING
@@ -82,9 +102,7 @@
 #define CPU_FREQ 16934400
 
 /* Define this if you have ATA power-off control */
-#if 0 /* TODO */
 #define HAVE_ATA_POWER_OFF
-#endif
 
 /* Virtual LED (icon) */
 #define CONFIG_LED LED_VIRTUAL
@@ -99,6 +117,7 @@
 
 #define USB_GIGABEAT_STYLE
 
+#define HAVE_HEADPHONE_DETECTION
 /* Define this if you have adjustable CPU frequency */
 #if 0 /* TODO */
 #define HAVE_ADJUSTABLE_CPU_FREQ
@@ -107,8 +126,5 @@
 #define BOOTFILE_EXT "gigabeat"
 #define BOOTFILE "rockbox." BOOTFILE_EXT
 
-#if 0 /* TODO */
-#define HAVE_BACKLIGHT_BRIGHTNESS
-#endif
-
+ 
 #endif
diff --git a/firmware/export/config.h b/firmware/export/config.h
index 68a4920d59..e37cc3f782 100644
--- a/firmware/export/config.h
+++ b/firmware/export/config.h
@@ -74,6 +74,7 @@
 #define BATT_LIPOL1300  1300 /* the type used in iRiver h1x0 models */
 #define BATT_LPCS355385 1550 /* iriver h10 20Gb - SKC LPCS355385 */
 #define BATT_BP009       820 /* iriver H10 5/6Gb - iriver BP009 */
+#define BATT_LIION830    830 /* Toshiba Gigabeat Fxx and Xxx series MK11-2740 */
 
 /* CONFIG_CHARGING */
 #define CHARGING_SIMPLE  1 /* Simple, hardware controlled charging */
diff --git a/firmware/kernel.c b/firmware/kernel.c
index 01adfcc57d..75c6604682 100644
--- a/firmware/kernel.c
+++ b/firmware/kernel.c
@@ -56,7 +56,7 @@ void kernel_init(void)
 void sleep(int ticks)
 {
 #if CONFIG_CPU == S3C2440 && defined(BOOTLOADER)
-    int counter;
+    volatile int counter;
     TCON &= ~(1 << 20); // stop timer 4
     // TODO: this constant depends on dividers settings inherited from
     // firmware. Set them explicitly somwhere.
@@ -76,7 +76,7 @@ void sleep(int ticks)
 
 void yield(void)
 {
-#if (CONFIG_CPU == S3C2440 || defined(ELIO_TPJ1022) && defined(BOOTLOADER))
+#if ((CONFIG_CPU == S3C2440 || defined(ELIO_TPJ1022)) && defined(BOOTLOADER))
     /* Some targets don't like yielding in the bootloader */
 #else
     switch_thread(true, NULL);
@@ -560,27 +560,34 @@ void tick_start(unsigned int interval_in_ms)
 #elif CONFIG_CPU == S3C2440
 void tick_start(unsigned int interval_in_ms)
 {
-    unsigned long count;
+    TCON &= ~(1 << 20); // stop timer 4
+    // TODO: this constant depends on dividers settings inherited from
+    // firmware. Set them explicitly somwhere.
+    TCNTB4 = 12193 * interval_in_ms / 1000;
+    TCON |= 1 << 21; // set manual bit
+    TCON &= ~(1 << 21); // reset manual bit
+    TCON |= 1 << 22; //interval mode
+    TCON |= (1 << 20); // start timer 4
 
-    /* period = (n + 1) / 128 , n = tick time count (1~127)*/
-    count = interval_in_ms / 1000 * 128 - 1;
+    INTMOD &= ~(1 << 14); // timer 4 to IRQ mode
+    INTMSK &= ~(1 << 14); // timer 4 unmask interrupts
+}
 
-    if(count > 127)
+void timer4(void) {
+        int i;
+    /* Run through the list of tick tasks */
+    for(i = 0; i < MAX_NUM_TICK_TASKS; i++)
     {
-        panicf("Error! The tick interval is too long (%d ms)\n",
-               interval_in_ms);
-        return;
+        if(tick_funcs[i])
+        {
+            tick_funcs[i]();
+        }
     }
 
-    /* Disable the tick */
-    TICNT &= ~(1<<7);
-    /* Set the count value */
-    TICNT |= count;
-    /* Start up the ticker */
-    TICNT |= (1<<7);
+    current_tick++;
 
-    /* need interrupt handler ??? */
-    
+    /* following needs to be fixed.  */
+    /*wake_up_thread();*/
 }
 #endif
 
diff --git a/firmware/pcm_playback.c b/firmware/pcm_playback.c
index 92a4c3e5c7..2bff437ef0 100644
--- a/firmware/pcm_playback.c
+++ b/firmware/pcm_playback.c
@@ -59,46 +59,9 @@ void pcm_play_pause_unpause(void);
 
 /** Functions that require targeted implementation **/
 
-#ifndef CPU_COLDFIRE
+#if !defined(CPU_COLDFIRE) && (CONFIG_CPU != S3C2440)
 
-#if (CONFIG_CPU == S3C2440) 
-
-/* TODO: Implement for Gigabeat
-   For now, just implement some dummy functions.
-*/
-void pcm_init(void)
-{
-}
-
-void pcm_play_dma_start(const void *addr, size_t size)
-{
-    (void)addr;
-    (void)size;
-}
-
-void pcm_play_dma_stop(void)
-{
-}
-
-void pcm_play_pause_pause(void)
-{
-}
-
-void pcm_play_pause_unpause(void)
-{
-}
-
-void pcm_set_frequency(unsigned int frequency)
-{
-    (void)frequency;
-}
-
-size_t pcm_get_bytes_waiting(void)
-{
-    return 0;
-}
-
-#elif (CONFIG_CPU == PNX0101)
+#if (CONFIG_CPU == PNX0101)
 
 #define DMA_BUF_SAMPLES 0x100
 
diff --git a/firmware/powermgmt.c b/firmware/powermgmt.c
index c4582a7302..65dd42810e 100644
--- a/firmware/powermgmt.c
+++ b/firmware/powermgmt.c
@@ -191,6 +191,8 @@ static const unsigned int battery_level_dangerous[BATTERY_TYPES_COUNT] =
     105, 115
 #elif CONFIG_BATTERY == BATT_LIPOL1300  /* iRiver H1x0: LiPolymer */
     338
+#elif CONFIG_BATTERY == BATT_LIION830   /* Gigabeat F */
+    340
 #elif CONFIG_BATTERY == BATT_IAUDIO_X5  /* iAudio X5 */
     354
 #elif CONFIG_BATTERY == BATT_LPCS355385 /* iriver H10 20GB: LiPolymer*/
@@ -210,6 +212,8 @@ static const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
     270, 280
 #elif CONFIG_BATTERY == BATT_LIPOL1300  /* iRiver Hxxx */
     299
+#elif CONFIG_BATTERY == BATT_LIION830   /* Gigabeat F */
+    338
 #elif CONFIG_BATTERY == BATT_IAUDIO_X5  /* iAudio X5 */
     350
 #elif CONFIG_BATTERY == BATT_LPCS355385 /* iriver H10 20GB */
@@ -252,6 +256,9 @@ static const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
     /* May need recalibration. */
     {  93, 108, 114, 118, 121, 125, 128, 132, 136, 142, 158 }, /* alkaline */
     { 103, 118, 121, 123, 124, 125, 126, 127, 128, 129, 135 }  /* NiMH */
+#elif CONFIG_BATTERY == BATT_LIION830
+    /* Toshiba Gigabeat Li Ion 830mAH figured from discharge curve */
+    { 342, 358, 361, 368, 371, 374, 377, 381, 387, 390, 397 }
 #else /* NiMH */
     /* original values were taken directly after charging, but it should show
        100% after turning off the device for some hours, too */
@@ -263,12 +270,16 @@ static const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
 #ifdef CONFIG_CHARGING
 charger_input_state_type charger_input_state IDATA_ATTR;
 
+
 /* voltages (centivolt) of 0%, 10%, ... 100% when charging enabled */
 static const unsigned short percent_to_volt_charge[11] =
 {
 #if CONFIG_BATTERY == BATT_LIPOL1300
     /* values measured over one full charging cycle */
     354, 386, 393, 398, 400, 402, 404, 408, 413, 418, 423 /* LiPo */
+#elif CONFIG_BATTERY == BATT_LIION830
+    /* Toshiba Gigabeat Li Ion 830mAH */
+    347, 363, 366, 373, 376, 379, 382, 386, 393, 403, 411
 #elif CONFIG_BATTERY == BATT_LPCS355385
     /* iriver H10 20GB */
     399, 403, 406, 408, 410, 412, 415, 418, 422, 426, 431
diff --git a/firmware/system.c b/firmware/system.c
index 2ec9ff7a41..2bbcd06378 100644
--- a/firmware/system.c
+++ b/firmware/system.c
@@ -86,7 +86,15 @@ void cpu_idle_mode(bool on_off)
 void system_reboot(void) {
 }
 
-void system_init(void) {
+void system_init(void) 
+{
+    /* Turn off un-needed devices */
+
+    /* Turn off all of the UARTS */
+    CLKCON &= ~( (1<<10) | (1<<11) |(1<<12) );
+
+    /* Turn off AC97 and Camera */
+    CLKCON &= ~( (1<<19) | (1<<20) );
 }
 
 #endif
diff --git a/firmware/target/arm/crt0.S b/firmware/target/arm/crt0.S
index 82b7c31f92..c552e44320 100644
--- a/firmware/target/arm/crt0.S
+++ b/firmware/target/arm/crt0.S
@@ -122,7 +122,26 @@ start:
 /* Code for ARM bootloader targets other than iPod go here */
 
 #if CONFIG_CPU == S3C2440
-    bl main
+    /* get the high part of our execute address */
+    ldr    r2, =0xffffff00
+    and    r4, pc, r2
+
+    /* Copy bootloader to safe area - 0x31000000 */
+    mov    r5, #0x30000000
+    add    r5, r5, #0x1000000
+    ldr    r6, = _dataend
+    sub    r0, r6, r5       /* length of loader */
+    add    r0, r4, r0     /* r0 points to start of loader */
+1:
+    cmp    r5, r6
+    ldrcc  r2, [r4], #4
+    strcc  r2, [r5], #4
+    bcc    1b
+
+    ldr    pc, =start_loc    /* jump to the relocated start_loc:  */
+    
+start_loc:
+     bl main
 #endif
 
 #else /* BOOTLOADER */
@@ -201,7 +220,10 @@ prefetch_abort_handler:
 fiq_handler:
     @ Branch straight to FIQ handler in pcm_playback.c. This also handles the
     @ the correct return sequence.
-    ldr    pc, =fiq
+    stmfd sp!, {r0-r7, r12, lr}
+    bl    fiq
+    ldmfd sp!, {r0-r7, r12, lr}
+    subs pc, lr, #4
 
 data_abort_handler:
     sub    r0, lr, #8 
@@ -210,9 +232,9 @@ data_abort_handler:
 
 irq_handler:
 #ifndef STUB
-    stmfd  sp!, {r0-r3, r12, lr}
+    stmfd  sp!, {r0-r11, r12, lr}
     bl     irq
-    ldmfd  sp!, {r0-r3, r12, lr}
+    ldmfd  sp!, {r0-r11, r12, lr}
 #endif
     subs   pc, lr, #4
 
diff --git a/firmware/target/arm/gigabeat/meg-fx/adc-meg-fx.c b/firmware/target/arm/gigabeat/meg-fx/adc-meg-fx.c
index 78b9dea5b2..4c448c2e41 100644
--- a/firmware/target/arm/gigabeat/meg-fx/adc-meg-fx.c
+++ b/firmware/target/arm/gigabeat/meg-fx/adc-meg-fx.c
@@ -18,24 +18,67 @@
  ****************************************************************************/
 #include "cpu.h"
 #include "adc-target.h"
+#include "kernel.h"
 
 
-void adc_init(void) {
-  /* Turn on the ADC PCLK */
-  CLKCON |= (1<<15);
 
-  /* Set channel 0, normal mode, disable "start by read" */
-  ADCCON &= ~(0x3F);
+static unsigned short adc_readings[NUM_ADC_CHANNELS];
 
-  /* No start delay.  Use nromal conversion mode. */
-  ADCDLY |= 0x1;
+/* prototypes */
+static unsigned short __adc_read(int channel);
+static void adc_tick(void);
 
-  /* Set and enable the prescaler */
-  ADCCON = (ADCCON & ~(0xff<<6)) | (0x19<<6);
-  ADCCON |= (1<<14);
+
+
+void adc_init(void) 
+{
+    int i;
+
+    /* Turn on the ADC PCLK */
+    CLKCON |= (1<<15);
+
+    /* Set channel 0, normal mode, disable "start by read" */
+    ADCCON &= ~(0x3F);
+
+    /* No start delay.  Use normal conversion mode. */
+    ADCDLY = 0x1;
+
+    /* Set and enable the prescaler */
+    ADCCON = (ADCCON & ~(0xff<<6)) | (0x19<<6);
+    ADCCON |= (1<<14);
+
+    /* prefill the adc channels */
+    for (i = 0; i < NUM_ADC_CHANNELS; i++)
+    {
+        adc_readings[i] = __adc_read(i);
+    }
+
+    /* start at zero so when the tick starts it is at zero */
+    adc_readings[0] = __adc_read(0);
+
+    /* attach the adc reading to the tick */
+    tick_add_task(adc_tick);
+
+    
+}
+
+
+
+/* Called to get the recent ADC reading */
+inline unsigned short adc_read(int channel)
+{
+    return adc_readings[channel];
 }
 
-unsigned short adc_read(int channel) {
+
+
+/** 
+  * Read the ADC by polling
+  * @param channel The ADC channel to read
+  * @return 10bit reading from ADC channel or ADC_READ_ERROR if timeout
+  */
+static unsigned short __adc_read(int channel) 
+{
   int i;
 
   /* Set the channel */
@@ -45,34 +88,57 @@ unsigned short adc_read(int channel) {
   ADCCON |= 0x1;
 
   /* Wait for a low Enable_start */
-  i = 20000;
-  while(i > 0) {
-    if(ADCCON & 0x1) {
-      i--;
+  for (i = 20000;;) {
+    if(0 == (ADCCON & 0x1)) {
+      break;
     }
     else {
-      break;
+      i--;
+      if (0 == i) {
+        /* Ran out of time */
+        return ADC_READ_ERROR;
+      }
     }
   }
-  if(i == 0) {
-    /* Ran out of time */
-    return(0);
-  }
 
   /* Wait for high End_of_Conversion */
-  i = 20000;
-  while(i > 0) {
-    if(ADCCON & (1<<15)) {      
+  for(i = 20000;;) {
+    if(ADCCON & (1<<15)) {
       break;
     }
     else {
       i--;
+      if(0 == i) {
+        /* Ran out of time */
+        return ADC_READ_ERROR;
+      }
     }
   }
-  if(i == 0) {
-    /* Ran out of time */
-    return(0);
-  }
 
-  return(ADCDAT0 & 0x3ff);
+  return (ADCDAT0 & 0x3ff);
+}
+
+
+
+/* add this to the tick so that the ADC converts are done in the background */
+static void adc_tick(void)
+{
+    static unsigned channel;
+
+    /* Check if the End Of Conversion is set */
+    if (ADCCON & (1<<15)) 
+    {
+        adc_readings[channel] = (ADCDAT0 & 0x3FF);
+        if (++channel >= NUM_ADC_CHANNELS)
+        {
+            channel = 0;
+        }
+
+        /* setup the next conversion and start it*/
+        ADCCON = (ADCCON & ~(0x7<<3)) | (channel<<3) | 0x01;
+    }
 }
+
+
+
+  
diff --git a/firmware/target/arm/gigabeat/meg-fx/adc-target.h b/firmware/target/arm/gigabeat/meg-fx/adc-target.h
index 8ea02b33e6..8d2beaf320 100644
--- a/firmware/target/arm/gigabeat/meg-fx/adc-target.h
+++ b/firmware/target/arm/gigabeat/meg-fx/adc-target.h
@@ -19,12 +19,19 @@
 #ifndef _ADC_TARGET_H_
 #define _ADC_TARGET_H_
 
-#define NUM_ADC_CHANNELS 4
+/* only two channels used by the Gigabeat */
+#define NUM_ADC_CHANNELS 2
 
 #define ADC_BATTERY     0
-#define ADC_UNKNOWN_2   1
+#define ADC_HPREMOTE    1
 #define ADC_UNKNOWN_3   2
 #define ADC_UNKNOWN_4   3
+#define ADC_UNKNOWN_5   4
+#define ADC_UNKNOWN_6   5
+#define ADC_UNKNOWN_7   6
+#define ADC_UNKNOWN_8   7
+
 #define ADC_UNREG_POWER ADC_BATTERY /* For compatibility */
+#define ADC_READ_ERROR 0xFFFF
 
 #endif
diff --git a/firmware/target/arm/gigabeat/meg-fx/ata-meg-fx.c b/firmware/target/arm/gigabeat/meg-fx/ata-meg-fx.c
index 58fec1e6a3..ec0f3fe6ca 100644
--- a/firmware/target/arm/gigabeat/meg-fx/ata-meg-fx.c
+++ b/firmware/target/arm/gigabeat/meg-fx/ata-meg-fx.c
@@ -26,11 +26,18 @@
 
 void ata_reset(void)
 {
+    GPGDAT &= ~(1 << 10);
+    sleep(1); /* > 25us */
+    GPGDAT |= (1 << 10);
+    sleep(1); /* > 2ms */
 }
 
 void ata_enable(bool on)
 {
-    (void)on;
+    if(on)
+        GPGDAT &= ~(1 << 12);
+    else
+        GPGDAT |= (1 << 12);
 }
 
 bool ata_is_coldstart(void)
diff --git a/firmware/target/arm/gigabeat/meg-fx/ata-target.h b/firmware/target/arm/gigabeat/meg-fx/ata-target.h
index 1d49a1b874..95b66ab1bd 100644
--- a/firmware/target/arm/gigabeat/meg-fx/ata-target.h
+++ b/firmware/target/arm/gigabeat/meg-fx/ata-target.h
@@ -20,6 +20,8 @@
 #define ATA_TARGET_H
 
 /* Plain C read & write loops */
+#define PREFER_C_READING
+#define PREFER_C_WRITING
 
 #define ATA_IOBASE      0x18000000
 #define ATA_DATA        (*((volatile unsigned short*)(ATA_IOBASE)))
diff --git a/firmware/target/arm/gigabeat/meg-fx/backlight-meg-fx.c b/firmware/target/arm/gigabeat/meg-fx/backlight-meg-fx.c
index 9abf34ccf9..ba98dba7d1 100644
--- a/firmware/target/arm/gigabeat/meg-fx/backlight-meg-fx.c
+++ b/firmware/target/arm/gigabeat/meg-fx/backlight-meg-fx.c
@@ -19,11 +19,16 @@
 #include "config.h"
 #include "cpu.h"
 #include "system.h"
+#include "backlight-target.h"
 #include "backlight.h"
 #include "lcd.h"
 #include "sc606-meg-fx.h"
 
-int confval = SC606_LOW_FREQ;
+static int confval = SC606_LOW_FREQ;
+
+void __backlight_init(void)
+{
+}
 
 void __backlight_on(void)
 {
diff --git a/firmware/target/arm/gigabeat/meg-fx/backlight-target.h b/firmware/target/arm/gigabeat/meg-fx/backlight-target.h
index 3204293131..e72e863ebc 100644
--- a/firmware/target/arm/gigabeat/meg-fx/backlight-target.h
+++ b/firmware/target/arm/gigabeat/meg-fx/backlight-target.h
@@ -19,6 +19,7 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
 
+void __backlight_init(void);
 void __backlight_on(void);
 void __backlight_off(void);
 void __backlight_set_brightness(int val);
diff --git a/firmware/target/arm/gigabeat/meg-fx/button-meg-fx.c b/firmware/target/arm/gigabeat/meg-fx/button-meg-fx.c
index 88a1b4de09..210febb7db 100644
--- a/firmware/target/arm/gigabeat/meg-fx/button-meg-fx.c
+++ b/firmware/target/arm/gigabeat/meg-fx/button-meg-fx.c
@@ -27,58 +27,127 @@
 #include "adc.h"
 #include "system.h"
 
+static bool headphones_detect;
+
+static int const remote_buttons[] =
+{
+    BUTTON_NONE,    /* Headphones connected - remote disconnected */
+    BUTTON_SELECT,
+    BUTTON_MENU,    /* could be changed to BUTTON_A */
+    BUTTON_LEFT,
+    BUTTON_RIGHT,
+    BUTTON_UP,      /* could be changed to BUTTON_VOL_UP */
+    BUTTON_DOWN,    /* could be changed to BUTTON_VOL_DOWN */
+    BUTTON_NONE,    /* Remote control attached - no buttons pressed */
+    BUTTON_NONE,    /* Nothing in the headphone socket */
+};
+
+
+
+
+
 void button_init_device(void)
 {
     /* Power, Remote Play & Hold switch */
 }
 
-bool button_hold(void)
+
+
+inline bool button_hold(void)
 {
     return (GPGDAT & (1 << 15));
 }
 
-int button_read_device(void)
-{
-    int btn = BUTTON_NONE;
-    int touchpad = GPJDAT;
-    int buttons = GPGDAT;
-
-    /* Check for hold first */
-    if (buttons & (1 << 15))
-        return btn;
 
-    /* the side buttons */
-    if (buttons & (1 << 0))
-        btn |= BUTTON_POWER;
-
-    if (buttons & (1 << 1))
-        btn |= BUTTON_MENU;
-
-    if (buttons & (1 << 2))
-        btn |= BUTTON_VOL_UP;
-
-    if (buttons & (1 << 3))
-        btn |= BUTTON_VOL_DOWN;
-
-    if (buttons & (1 << 4))
-        btn |= BUTTON_A;
 
+int button_read_device(void)
+{
+    int btn;
+    int touchpad;
+    int buttons;
+    static int lastbutton;
+    unsigned short remote_adc;
+
+    /* Check for hold first - exit if asserted with no button pressed */
+    if (button_hold())
+        return BUTTON_NONE;
+
+    /* See header for ADC values when remote control buttons are pressed */
+    /* Only one button can be sensed at a time on the remote. */
+    /* Need to filter the remote button because the ADC is so fast */
+    remote_adc = adc_read(ADC_HPREMOTE);
+    btn = remote_buttons[(remote_adc + 64) / 128];
+    if (btn != lastbutton)
+    {
+        /* if the buttons dont agree twice in a row, then its none */
+        lastbutton = btn;
+        btn = BUTTON_NONE;
+    }
+        
+    /* 
+     * Code can be added that overrides the side buttons when the remote is
+     *  plugged in: Check for remote_adc > 64 && remote_adc < 930 then skip
+     *  reading the side and touch volume buttons, right, left, up, down, etc.
+     *  but keep reading the Power and 'A'.
+     * For now, the buttons from remote and side and touch are used together.
+     */
+
+    
+    /* the side buttons - Check before doing all of the work on each bit */
+    buttons = GPGDAT & 0x1F;
+    if (buttons)
+    {
+        if (buttons & (1 << 0))
+            btn |= BUTTON_POWER;
+
+        if (buttons & (1 << 1))
+            btn |= BUTTON_MENU;
+
+        if (buttons & (1 << 2))
+            btn |= BUTTON_VOL_UP;
+
+        if (buttons & (1 << 3))
+            btn |= BUTTON_VOL_DOWN;
+
+        if (buttons & (1 << 4))
+            btn |= BUTTON_A;
+    }
+    
     /* the touchpad */
-    if (touchpad & (1 << 0))
-        btn |= BUTTON_UP;
+    touchpad = GPJDAT & 0x10C9;
+    if (touchpad)
+    {
+        if (touchpad & (1 << 0))
+            btn |= BUTTON_UP;
 
-    if (touchpad & (1 << 12))
-        btn |= BUTTON_RIGHT;
+        if (touchpad & (1 << 12))
+            btn |= BUTTON_RIGHT;
 
-    if (touchpad & (1 << 6))
-        btn |= BUTTON_DOWN;
+        if (touchpad & (1 << 6))
+            btn |= BUTTON_DOWN;
 
-    if (touchpad & (1 << 7))
-        btn |= BUTTON_LEFT;
-
-    if (touchpad & (1 << 3))
-        btn |= BUTTON_SELECT;
+        if (touchpad & (1 << 7))
+            btn |= BUTTON_LEFT;
 
+        if (touchpad & (1 << 3))
+            btn |= BUTTON_SELECT;
+    }
+    
     return btn;
 }
 
+
+
+bool headphones_inserted(void)
+{
+    unsigned short remote_adc = adc_read(ADC_HPREMOTE);
+    if (remote_adc != ADC_READ_ERROR)
+    {
+        /* If there is nothing in the headphone socket, the ADC reads high */
+        if (remote_adc < 940)
+            headphones_detect = true;
+        else
+            headphones_detect = false;
+    }
+    return headphones_detect;
+}
diff --git a/firmware/target/arm/gigabeat/meg-fx/button-target.h b/firmware/target/arm/gigabeat/meg-fx/button-target.h
index 95fb72e601..ab68e8050f 100644
--- a/firmware/target/arm/gigabeat/meg-fx/button-target.h
+++ b/firmware/target/arm/gigabeat/meg-fx/button-target.h
@@ -45,6 +45,37 @@ int button_read_device(void);
 #define BUTTON_A            0x00000200
 
 
+/* Toshiba Gigabeat specific remote button ADC values */
+/* The remote control uses ADC 1 to emulate button pushes
+    Reading (approx)     Button      HP plugged in?      Remote plugged in?
+         0                 N/A            Yes                  No
+        125             Play/Pause      Cant tell             Yes
+        241             Speaker+        Cant tell             Yes
+        369             Rewind          Cant tell             Yes
+        492             Fast Fwd        Cant tell             Yes
+        616             Vol +           Cant tell             Yes
+        742             Vol -           Cant tell             Yes
+        864             None            Cant tell             Yes
+       1023              N/A               No                  No
+*/
+
+/* 
+    Notes:
+
+    Buttons on the remote are translated into equivalent button presses just
+    as if you were pressing them on the Gigabeat itself.
+    
+    We cannot tell if the hold is asserted on the remote. The Hold function on 
+    the remote is to block the output of the buttons changing.
+
+    Only one button can be sensed at a time. If another is pressed, the button
+    with the lowest reading is dominant. So, if Rewind and Vol + are pressed
+    at the same time, Rewind value is the one that is read.
+*/
+    
+
+
+
 #define BUTTON_MAIN (BUTTON_POWER|BUTTON_MENU|BUTTON_LEFT|BUTTON_RIGHT\
                 |BUTTON_UP|BUTTON_DOWN|BUTTON_VOL_UP|BUTTON_VOL_DOWN\
                 |BUTTON_SELECT|BUTTON_A)
diff --git a/firmware/target/arm/gigabeat/meg-fx/dma_start.c b/firmware/target/arm/gigabeat/meg-fx/dma_start.c
new file mode 100644
index 0000000000..c1ab6c15cb
--- /dev/null
+++ b/firmware/target/arm/gigabeat/meg-fx/dma_start.c
@@ -0,0 +1,8 @@
+#include <sys/types.h>
+
+void dma_start(const void* addr, size_t size) {
+  (void) addr;
+  (void) size;
+  //TODO:
+}
+
diff --git a/firmware/target/arm/gigabeat/meg-fx/kernel-meg-fx.c b/firmware/target/arm/gigabeat/meg-fx/kernel-meg-fx.c
new file mode 100644
index 0000000000..9df90a2344
--- /dev/null
+++ b/firmware/target/arm/gigabeat/meg-fx/kernel-meg-fx.c
@@ -0,0 +1,25 @@
+#include "kernel.h"
+#include "thread.h"
+
+#include <stdio.h>
+#include "lcd.h"
+
+extern void (*tick_funcs[MAX_NUM_TICK_TASKS])(void);
+
+void timer4(void) {
+        int i;
+    /* Run through the list of tick tasks */
+    for(i = 0; i < MAX_NUM_TICK_TASKS; i++)
+    {
+        if(tick_funcs[i])
+        {
+            tick_funcs[i]();
+        }
+    }
+
+    current_tick++;
+
+    /* following needs to be fixed.  */
+    /*wake_up_thread();*/
+}
+
diff --git a/firmware/target/arm/gigabeat/meg-fx/lcd-meg-fx.c b/firmware/target/arm/gigabeat/meg-fx/lcd-meg-fx.c
index f193f9806d..df5be43551 100644
--- a/firmware/target/arm/gigabeat/meg-fx/lcd-meg-fx.c
+++ b/firmware/target/arm/gigabeat/meg-fx/lcd-meg-fx.c
@@ -1,27 +1,56 @@
 #include "config.h"
+#include <string.h>
 #include "cpu.h"
 #include "lcd.h"
 #include "kernel.h"
 #include "system.h"
-#include "string.h"
 
 void lcd_init_device(void);
 void lcd_update_rec(int, int, int, int);
 void lcd_update(void);
 
+bool usedmablit = false;
+
 /* LCD init */
 void lcd_init_device(void)
 {
+    /* Switch from 555I mode to 565 mode */
+    LCDCON5 |= 1 << 11;
+   
 }
 
 /* Update a fraction of the display. */
 void lcd_update_rect(int x, int y, int width, int height)
 {
     (void)x;
-    (void)y;
     (void)width;
-    (void)height;
-    memcpy(FRAME, &lcd_framebuffer, sizeof(lcd_framebuffer));
+    
+    if (usedmablit) 
+    {
+        /* Spin waiting for DMA to become available */
+        //while (DSTAT0 & (1<<20)) ;
+        if (DSTAT0 & (1<<20)) return;
+        
+        /* set DMA dest */
+        DIDST0 = (int) FRAME + y * sizeof(fb_data) * LCD_WIDTH;
+
+        /* FRAME on AHB buf, increment */
+        DIDSTC0 = 0;
+        DCON0 = (((1<<30) | (1<<28) | (1<<27) | (1<<22) | (2<<20)) | ((height * sizeof(fb_data) * LCD_WIDTH) >> 4));
+
+        /* set DMA source and options */
+        DISRC0 = (int) &lcd_framebuffer + (y * sizeof(fb_data) * LCD_WIDTH) + 0x30000000;
+        DISRCC0 = 0x00;  /* memory is on AHB bus, increment addresses */
+
+        /* Activate the channel */
+        DMASKTRIG0 = 0x2;
+        /* Start DMA */
+        DMASKTRIG0 |= 0x1;
+    }
+    else
+    {
+        memcpy((void*)FRAME, &lcd_framebuffer, sizeof(lcd_framebuffer));
+    }
 }
 
 /* Update the display.
@@ -45,6 +74,138 @@ void lcd_update(void)
 #define ROUNDOFFS (127*257)
 
 /* Performance function to blit a YUV bitmap directly to the LCD */
+/* For the Gigabeat - show it rotated */
+/* So the LCD_WIDTH is now the height */
+void lcd_yuv_blit(unsigned char * const src[3],
+                  int src_x, int src_y, int stride,
+                  int x, int y, int width, int height)
+{
+    width = (width + 1) & ~1;
+    fb_data *dst = (fb_data*)FRAME + x * LCD_WIDTH + (LCD_WIDTH - y) - 1;
+    fb_data *dst_last = dst - (height - 1);
+
+    for (;;)
+    {
+        fb_data *dst_row = dst;
+        int count = width;
+        const unsigned char *ysrc = src[0] + stride * src_y + src_x;
+        int y, u, v;
+        int red, green, blue;
+        unsigned rbits, gbits, bbits;
+
+        /* upsampling, YUV->RGB conversion and reduction to RGB565 in one go */
+        const unsigned char *usrc = src[1] + (stride/CSUB_X) * (src_y/CSUB_Y)
+                                           + (src_x/CSUB_X);
+        const unsigned char *vsrc = src[2] + (stride/CSUB_X) * (src_y/CSUB_Y)
+                                           + (src_x/CSUB_X);
+        int xphase = src_x % CSUB_X;
+        int rc, gc, bc;
+
+        u = *usrc++ - 128;
+        v = *vsrc++ - 128;
+        rc = RVFAC * v + ROUNDOFFS;
+        gc = GVFAC * v + GUFAC * u + ROUNDOFFS;
+        bc = BUFAC * u + ROUNDOFFS;
+
+        do
+        {
+            y = *ysrc++;
+            red   = RYFAC * y + rc;
+            green = GYFAC * y + gc;
+            blue  = BYFAC * y + bc;
+
+            if ((unsigned)red > (RYFAC*255+ROUNDOFFS))
+            {
+                if (red < 0)
+                    red = 0;
+                else
+                    red = (RYFAC*255+ROUNDOFFS);
+            }
+            if ((unsigned)green > (GYFAC*255+ROUNDOFFS))
+            {
+                if (green < 0)
+                    green = 0;
+                else
+                    green = (GYFAC*255+ROUNDOFFS);
+            }
+            if ((unsigned)blue > (BYFAC*255+ROUNDOFFS))
+            {
+                if (blue < 0)
+                    blue = 0;
+                else
+                    blue = (BYFAC*255+ROUNDOFFS);
+            }
+            rbits = ((unsigned)red) >> 16 ;
+            gbits = ((unsigned)green) >> 16 ;
+            bbits = ((unsigned)blue) >> 16 ;
+
+            *dst_row = (rbits << 11) | (gbits << 5) | bbits;
+
+            /* next pixel - since rotated, add WIDTH */
+            dst_row += LCD_WIDTH;
+
+            if (++xphase >= CSUB_X)
+            {
+                u = *usrc++ - 128;
+                v = *vsrc++ - 128;
+                rc = RVFAC * v + ROUNDOFFS;
+                gc = GVFAC * v + GUFAC * u + ROUNDOFFS;
+                bc = BUFAC * u + ROUNDOFFS;
+                xphase = 0;
+            }
+        }
+        while (--count);
+
+        if (dst == dst_last) break;
+
+        dst--;
+        src_y++;
+    }
+}
+
+
+
+void lcd_set_contrast(int val) {
+  (void) val;
+  // TODO:
+}
+
+void lcd_set_invert_display(bool yesno) {
+  (void) yesno;
+  // TODO:
+}
+
+void lcd_blit(const fb_data* data, int bx, int y, int bwidth,
+              int height, int stride)
+{
+  (void) data;
+  (void) bx;
+  (void) y;
+  (void) bwidth;
+  (void) height;
+  (void) stride;
+  //TODO:
+}
+
+void lcd_set_flip(bool yesno) {
+  (void) yesno;
+  // TODO:
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+#if 0
+/* Performance function to blit a YUV bitmap directly to the LCD */
 void lcd_yuv_blit(unsigned char * const src[3],
                   int src_x, int src_y, int stride,
                   int x, int y, int width, int height)
@@ -129,3 +290,7 @@ void lcd_yuv_blit(unsigned char * const src[3],
     }
     while (dst < dst_end);
 }
+#endif
+
+
+
diff --git a/firmware/target/arm/gigabeat/meg-fx/mmu-meg-fx.c b/firmware/target/arm/gigabeat/meg-fx/mmu-meg-fx.c
new file mode 100644
index 0000000000..05b206c8ea
--- /dev/null
+++ b/firmware/target/arm/gigabeat/meg-fx/mmu-meg-fx.c
@@ -0,0 +1,84 @@
+#include <string.h>
+#include "s3c2440.h"
+
+void map_memory(void);
+static void enable_mmu(void);
+static void set_ttb(void);
+static void set_page_tables(void);
+static void map_section(unsigned int pa, unsigned int va, int mb, int cache_flags);
+
+#define SECTION_ADDRESS_MASK (-1 << 20)
+#define CACHE_ALL (1 << 3 | 1 << 2 )
+#define CACHE_NONE 0
+#define BUFFERED (1 << 2)
+#define MB (1 << 20)
+
+void map_memory(void) {
+    set_ttb();
+    set_page_tables();
+    enable_mmu();
+}
+
+unsigned int* ttb_base;
+const int ttb_size = 4096;
+
+void set_ttb() {
+    int i;
+    int* ttbPtr;
+    int domain_access;
+
+    /* must be 16Kb (0x4000) aligned */
+    ttb_base = (int*)0x31F00000;
+    for (i=0; i<ttb_size; i++,ttbPtr++)
+    ttbPtr = 0;
+    asm volatile("mcr p15, 0, %0, c2, c0, 0" : : "r" (ttb_base));
+
+    /* set domain D0 to "client" permission access */
+
+    domain_access = 3;
+    asm volatile("mcr p15, 0, %0, c3, c0, 0" : : "r" (domain_access));
+
+}
+
+void set_page_tables() {
+
+    map_section(0, 0, 0x1000, CACHE_NONE);
+
+    map_section(0x30000000, 0, 32, CACHE_NONE); /* map RAM to 0 */
+
+    map_section(0x30000000, 0, 30, CACHE_ALL); /* cache the first 30 MB or RAM */
+    map_section(0x31E00000, 0x31E00000, 1, BUFFERED); /* enable buffered writing for the framebuffer */
+}
+
+void map_section(unsigned int pa, unsigned int va, int mb, int cache_flags) {
+    unsigned int* ttbPtr;
+    int i;
+    int section_no;
+
+    section_no = va >> 20; /* sections are 1Mb size */
+    ttbPtr = ttb_base + section_no;
+    pa &= SECTION_ADDRESS_MASK; /* align to 1Mb */
+    for(i=0; i<mb; i++, pa += MB) {
+    *(ttbPtr + i) =
+        pa |
+        1 << 10 |    /* superuser - r/w, user - no access */
+        0 << 5 |    /* domain 0th */
+        1 << 4 |    /* should be "1" */
+        cache_flags |
+        1 << 1;    /* Section signature */
+    }
+}
+
+static void enable_mmu(void) {
+    asm volatile("mov r0, #0\n"
+        "mcr p15, 0, r0, c8, c7, 0\n" /* invalidate TLB */
+
+        "mcr p15, 0, r0, c7, c7,0\n" /* invalidate both icache and dcache */
+
+        "mrc p15, 0, r0, c1, c0, 0\n"
+        "orr r0, r0, #1<<0\n" /* enable mmu bit, icache and dcache */
+        "orr r0, r0, #1<<2\n" /* enable dcache */
+        "orr r0, r0, #1<<12\n" /* enable icache */
+        "mcr p15, 0, r0, c1, c0, 0" : : : "r0");
+    asm volatile("nop \n nop \n nop \n nop");
+}
diff --git a/firmware/target/arm/gigabeat/meg-fx/pcm-meg-fx.c b/firmware/target/arm/gigabeat/meg-fx/pcm-meg-fx.c
new file mode 100644
index 0000000000..a3c09c5c64
--- /dev/null
+++ b/firmware/target/arm/gigabeat/meg-fx/pcm-meg-fx.c
@@ -0,0 +1,347 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 by Michael Sevakis
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "system.h"
+#include "kernel.h"
+#include "logf.h"
+#include "audio.h"
+#include "wm8975.h"
+#include "file.h"
+
+static int pcm_freq = HW_SAMPR_DEFAULT; /* 44.1 is default */
+
+#define FIFO_COUNT ((IISFCON >> 6) & 0x01F)
+
+/* number of bytes in FIFO */
+#define IIS_FIFO_SIZE 64
+
+/* Setup for the DMA controller */
+#define DMA_CONTROL_SETUP  ((1<<31) | (1<<29) | (1<<23) | (1<<22) | (1<<20))
+
+unsigned short * p;
+size_t p_size;
+
+
+
+/* DMA count has hit zero - no more data */
+/* Get more data from the callback and top off the FIFO */
+//void fiq(void) __attribute__ ((interrupt ("naked")));
+void fiq(void) ICODE_ATTR __attribute__ ((interrupt ("FIQ")));
+void fiq(void)
+{
+    /* clear any pending interrupt */
+    SRCPND = (1<<19);
+
+    /* Buffer empty.  Try to get more. */
+    if (pcm_callback_for_more) 
+    {
+        pcm_callback_for_more((unsigned char**)&p, &p_size);
+    }
+    else 
+    {
+        /* callback func is missing? */
+        pcm_play_dma_stop();
+        return;
+    }
+
+    if (p_size)
+    {
+        /* set the new DMA values */
+        DCON2 = DMA_CONTROL_SETUP | (p_size >> 1);
+        DISRC2 = (int)p + 0x30000000;
+
+        /* Re-Activate the channel */
+        DMASKTRIG2 = 0x2; 
+    }
+    else
+    {
+        /* No more DMA to do */
+        pcm_play_dma_stop();
+    }
+        
+}
+
+
+
+void pcm_init(void)
+{
+    pcm_playing = false;
+    pcm_paused = false;
+    pcm_callback_for_more = NULL;
+    
+    audiohw_init();
+    audiohw_enable_output(true);
+    audiohw_mute(true);
+
+    /* cannot use the WM8975 defaults since our clock is not the same */
+    /* the input master clock is 16.9344MHz - we can divide exact for that */
+    audiohw_set_sample_rate( (0<<6) | (0x11 << 1) | (0<<0));
+
+    /* init GPIO */
+    GPCCON = (GPCCON & ~(3<<14)) | (1<<14);
+    GPCDAT |= 1<<7;
+    GPECON |= 0x2aa;
+
+    /* Do no service DMA0 requests, yet */
+    /* clear any pending int and mask it */
+    INTMSK |= (1<<19);      /* mask the interrupt */
+    SRCPND = (1<<19);       /* clear any pending interrupts */
+    INTMOD |= (1<<19);      /* connect to FIQ */
+
+}
+
+
+
+void pcm_play_dma_start(const void *addr, size_t size)
+{
+    //FIXME
+    //return;
+
+    int i;
+    
+    /* sanity check: bad pointer or too small file */
+    if ((NULL == addr) || (size & ~1) <= IIS_FIFO_SIZE) return;
+
+    p = (unsigned short *)addr;
+    p_size = size;
+
+
+    /* Enable the IIS clock */
+    CLKCON |= (1<<17);  
+
+    /* IIS interface setup and set to idle */
+    IISCON = (1<<5) | (1<<3);
+
+    /* slave, transmit mode, 16 bit samples - 384fs - use 16.9344Mhz */ 
+    IISMOD = (1<<9) | (1<<8) | (2<<6) | (1<<3) | (1<<2);
+
+    /* connect DMA to the FIFO and enable the FIFO */
+    IISFCON = (1<<15) | (1<<13);
+
+    /* prefill the FIFO with half words */
+    for (i=0; i < IIS_FIFO_SIZE; i+=2)
+    {
+        IISFIFO = *p++;
+        p_size -= 2;
+    }
+
+    /* set DMA dest */
+    DIDST2 = (int)&IISFIFO; 
+
+    /* IIS is on the APB bus, INT when TC reaches 0, fixed dest addr */
+    DIDSTC2 = 0x03;
+    
+    /* How many transfers to make - we transfer half-word at a time = 2 bytes */
+    /* DMA control: CURR_TC int, single service mode, I2SSDO int, HW trig */
+    /*     no auto-reload, half-word (16bit) */
+    DCON2 = DMA_CONTROL_SETUP | (p_size / 2);
+
+    /* set DMA source and options */
+    DISRC2 = (int)p + 0x30000000;
+    DISRCC2 = 0x00;  /* memory is on AHB bus, increment addresses */
+
+    /* clear pending DMA interrupt */
+    SRCPND = 1<<19;
+
+    enable_fiq(fiq);
+
+    /* unmask the DMA interrupt */
+    INTMSK &= ~(1<<19);
+
+    /* Activate the channel */
+    DMASKTRIG2 = 0x2;
+    
+    /* turn off the idle */
+    IISCON &= ~(1<<3);
+
+    pcm_playing = true;
+
+    /* start the IIS */
+    IISCON |= (1<<0);
+
+}
+
+
+
+/* Disconnect the DMA and wait for the FIFO to clear */
+void pcm_play_dma_stop(void)
+{
+    pcm_playing = false;
+
+    /* mask the DMA interrupt */
+    INTMSK |= (1<<19);
+
+    /* De-Activate the channel */
+    DMASKTRIG2 = 0x4;
+
+    /* idle the IIS transmit */
+    IISCON |= (1<<3);
+
+    /* stop the IIS interface */
+    IISCON &= ~(1<<0);
+
+    /* Disconnect the IIS IIS clock */
+    CLKCON &= ~(1<<17);  
+
+
+    disable_fiq();
+
+}
+
+
+
+void pcm_play_pause_pause(void)
+{
+    /* idle */
+    IISCON |= (1<<3);
+}
+
+
+
+void pcm_play_pause_unpause(void)
+{
+    /* no idle */
+    IISCON &= ~(1<<3);
+}
+
+
+
+void pcm_set_frequency(unsigned int frequency)
+{
+    int sr_ctrl;
+
+    switch(frequency)
+    {
+        case SAMPR_11:
+            sr_ctrl = 0x19 << 1;
+            break;
+        case SAMPR_22:
+            sr_ctrl = 0x1B << 1;
+            break;
+        default:
+        case SAMPR_44:
+            sr_ctrl = 0x11 << 1;
+            break;
+        case SAMPR_88:
+            sr_ctrl = 0x1F << 1;
+            break;
+    }
+    audiohw_set_sample_rate(sr_ctrl);
+    pcm_freq = frequency;
+}
+
+
+
+size_t pcm_get_bytes_waiting(void)
+{
+    return (DSTAT2 & 0xFFFFF) * 2;
+}
+
+
+
+/* dummy functions for those not actually supporting all this yet */
+void pcm_apply_settings(bool reset)
+{
+    (void)reset;
+}
+
+void pcm_set_monitor(int monitor)
+{
+    (void)monitor;
+}
+/** **/
+
+void pcm_mute(bool mute)
+{
+    audiohw_mute(mute);
+    if (mute)
+        sleep(HZ/16);
+}
+
+/*
+ * This function goes directly into the DMA buffer to calculate the left and
+ * right peak values. To avoid missing peaks it tries to look forward two full
+ * peek periods (2/HZ sec, 100% overlap), although it's always possible that
+ * the entire period will not be visible. To reduce CPU load it only looks at
+ * every third sample, and this can be reduced even further if needed (even
+ * every tenth sample would still be pretty accurate).
+ */
+
+/* Check for a peak every PEAK_STRIDE samples */
+#define PEAK_STRIDE   3
+/* Up to 1/50th of a second of audio for peak calculation */
+/* This should use NATIVE_FREQUENCY, or eventually an adjustable freq. value */
+#define PEAK_SAMPLES  (44100/50)
+void pcm_calculate_peaks(int *left, int *right)
+{
+    short *addr;
+    short *end;
+    {
+        size_t samples = p_size / 4;
+        addr = p;
+
+        if (samples > PEAK_SAMPLES)
+            samples = PEAK_SAMPLES - (PEAK_STRIDE - 1);
+        else
+            samples -= MIN(PEAK_STRIDE - 1, samples);
+
+        end = &addr[samples * 2];
+    }
+
+    if (left && right) {
+        int left_peak = 0, right_peak = 0;
+
+        while (addr < end) {
+            int value;
+            if ((value = addr [0]) > left_peak)
+                left_peak = value;
+            else if (-value > left_peak)
+                left_peak = -value;
+
+            if ((value = addr [PEAK_STRIDE | 1]) > right_peak)
+                right_peak = value;
+            else if (-value > right_peak)
+                right_peak = -value;
+
+            addr = &addr[PEAK_STRIDE * 2];
+        }
+
+        *left = left_peak;
+        *right = right_peak;
+    }
+    else if (left || right) {
+        int peak_value = 0, value;
+
+        if (right)
+            addr += (PEAK_STRIDE | 1);
+
+        while (addr < end) {
+            if ((value = addr [0]) > peak_value)
+                peak_value = value;
+            else if (-value > peak_value)
+                peak_value = -value;
+
+            addr += PEAK_STRIDE * 2;
+        }
+
+        if (left)
+            *left = peak_value;
+        else
+            *right = peak_value;
+    }
+}
diff --git a/firmware/target/arm/gigabeat/meg-fx/power-meg-fx.c b/firmware/target/arm/gigabeat/meg-fx/power-meg-fx.c
index 688b44eaa6..eb2ffb5238 100644
--- a/firmware/target/arm/gigabeat/meg-fx/power-meg-fx.c
+++ b/firmware/target/arm/gigabeat/meg-fx/power-meg-fx.c
@@ -23,6 +23,8 @@
 #include "system.h"
 #include "power.h"
 #include "pcf50606.h"
+#include "backlight.h"
+#include "backlight-target.h"
 
 #ifndef SIMULATOR
 
@@ -33,21 +35,34 @@ void power_init(void)
 
 bool charger_inserted(void)
 {
-    return !(GPFDAT & (1 << 4));
+    return (GPFDAT & (1 << 4)) ? false : true;
+}
+
+/* Returns true if the unit is charging the batteries. */
+bool charging_state(void) {
+    return (GPGDAT & (1 << 8)) ? false : true;
 }
 
 void ide_power_enable(bool on)
 {
-    (void)on;
+    if (on)
+        GPGDAT |= (1 << 11);
+    else
+        GPGDAT &= ~(1 << 11);
 }
 
 bool ide_powered(void)
 {
-    return true;
+    return (GPGDAT & (1 << 11)) != 0;
 }
 
 void power_off(void)
 {
+    /* turn off backlight and wait for 1 second */
+    __backlight_off();
+    sleep(HZ/2);
+    /* set SLEEP bit to on in CLKCON to turn off */
+    CLKCON |=(1<<3);
 }
 
 #else /* SIMULATOR */
diff --git a/firmware/target/arm/gigabeat/meg-fx/sc606-meg-fx.c b/firmware/target/arm/gigabeat/meg-fx/sc606-meg-fx.c
index b0554a8260..39718a4ec6 100644
--- a/firmware/target/arm/gigabeat/meg-fx/sc606-meg-fx.c
+++ b/firmware/target/arm/gigabeat/meg-fx/sc606-meg-fx.c
@@ -24,10 +24,11 @@
 
 #define SCL_SDA_HI    GPHDAT |= (3 << 9)
 
-/* arbitrary delay loop */
-#define DELAY   do { int _x; for(_x=0;_x<2000;_x++);} while (0)
+/* The SC606 can clock at 400KHz: 2.5uS period -> 1.25uS half period */
+/* At 300Mhz - if loop takes 6 cycles @ 3.3nS each -> 1.25uS / 20nS -> 63 */
+#define DELAY   do { volatile int _x; for(_x=0;_x<63;_x++);} while (0)
 
-void sc606_i2c_start(void)
+static void sc606_i2c_start(void)
 {
     SCL_SDA_HI;
     DELAY;
@@ -36,7 +37,7 @@ void sc606_i2c_start(void)
     SCL_LO;
 }
 
-void sc606_i2c_restart(void)
+static void sc606_i2c_restart(void)
 {
     SCL_SDA_HI;
     DELAY;
@@ -45,7 +46,7 @@ void sc606_i2c_restart(void)
     SCL_LO;
 }
 
-void sc606_i2c_stop(void)
+static void sc606_i2c_stop(void)
 {
     SDA_LO;
     DELAY;
@@ -55,7 +56,7 @@ void sc606_i2c_stop(void)
     DELAY;
 }
 
-void sc606_i2c_ack(void)
+static void sc606_i2c_ack(void)
 {
 
     SDA_LO;
@@ -64,11 +65,11 @@ void sc606_i2c_ack(void)
     SCL_LO;
 }
 
-int sc606_i2c_getack(void)
+static int sc606_i2c_getack(void)
 {
     int ret = 0;
 
-    /* Don't need a delay since this follows a data bit with a delay on the end */
+    /* Don't need a delay since follows a data bit with a delay on the end */
     SDA_INPUT;   /* And set to input */
     SCL_HI;
     DELAY;
@@ -83,7 +84,7 @@ int sc606_i2c_getack(void)
     return ret;
 }
 
-int sc606_i2c_outb(unsigned char byte)
+static int sc606_i2c_outb(unsigned char byte)
 {
     int i;
 
@@ -106,7 +107,7 @@ int sc606_i2c_outb(unsigned char byte)
     return sc606_i2c_getack();
 }
 
-unsigned char sc606_i2c_inb(void)
+static unsigned char sc606_i2c_inb(void)
 {
    int i;
    unsigned char byte = 0;
@@ -128,6 +129,8 @@ unsigned char sc606_i2c_inb(void)
    return byte;
 }
 
+
+
 int sc606_write(unsigned char reg, unsigned char data)
 {
     int x = 0;
diff --git a/firmware/target/arm/gigabeat/meg-fx/system-meg-fx.c b/firmware/target/arm/gigabeat/meg-fx/system-meg-fx.c
new file mode 100644
index 0000000000..d1c736e91f
--- /dev/null
+++ b/firmware/target/arm/gigabeat/meg-fx/system-meg-fx.c
@@ -0,0 +1,35 @@
+#include "kernel.h"
+#include "system.h"
+#include "panic.h"
+
+#include "lcd.h"
+#include <stdio.h>
+
+const int TIMER4_MASK = 1 << 14;
+
+int system_memory_guard(int newmode) 
+{
+    (void)newmode;
+    return 0;
+}
+
+extern void timer4(void);
+
+void irq(void) 
+{
+    int intpending = INTPND;
+
+    SRCPND = intpending; /* Clear this interrupt. */
+    INTPND = intpending; /* Clear this interrupt. */
+
+    /* Timer 4 */
+    if ((intpending & TIMER4_MASK) != 0)
+    {
+        timer4();
+    }
+    else 
+    {
+        /* unexpected interrupt */
+    }
+}
+
diff --git a/firmware/target/arm/gigabeat/meg-fx/usb-meg-fx.c b/firmware/target/arm/gigabeat/meg-fx/usb-meg-fx.c
index 6e0f31e8c7..2415a099ba 100644
--- a/firmware/target/arm/gigabeat/meg-fx/usb-meg-fx.c
+++ b/firmware/target/arm/gigabeat/meg-fx/usb-meg-fx.c
@@ -20,33 +20,72 @@
 #include <stdbool.h>
 #include "cpu.h"
 #include "system.h"
+#include "kernel.h"
 
-void usb_init_device(void)
-{
-}
+#define USB_RST_ASSERT   GPBDAT &= ~(1 << 4)
+#define USB_RST_DEASSERT GPBDAT |=  (1 << 4)
+
+#define USB_ATA_ENABLE   GPBDAT |=  (1 << 5)
+#define USB_ATA_DISABLE  GPBDAT &= ~(1 << 5)
+
+#define USB_VPLUS_PWR_ASSERT    GPBDAT |=  (1 << 6)
+#define USB_VPLUS_PWR_DEASSERT  GPBDAT &= ~(1 << 6)
 
-bool usb_detect(void)
+#define USB_IS_PRESENT  (!(GPFDAT & 1))
+
+
+
+/* The usb detect is one pin to the cpu active low */
+inline bool usb_detect(void)
 {
-    return (GPFDAT & 1) ? false : true;
+    return USB_IS_PRESENT;
 }
 
-void usb_enable(bool on)
-{
-    if(on) {
-        int i;
 
-        GPBDAT &= 0x7EF;
-        GPBCON |= 1<<8;
 
-        GPGDAT &= 0xE7FF;
-        GPGDAT |= 1<<11;
+void usb_init_device(void)
+{
+    USB_VPLUS_PWR_ASSERT;    
+    sleep(HZ/20);
+    
+    /* Reset the usb port */
+    /* Make sure the cpu pin for reset line is set to output */
+    GPBCON = (GPBCON & ~0x300) | 0x100;
+    USB_RST_ASSERT;
+    sleep(HZ/25);
+    USB_RST_DEASSERT;
+    
+    /* needed to complete the reset */
+    USB_ATA_ENABLE;
+    
+    sleep(HZ/15);       /* 66ms */
+    
+    USB_ATA_DISABLE;
+    
+    sleep(HZ/25);
+    
+    /* leave chip in low power mode */
+    USB_VPLUS_PWR_DEASSERT;
+    
+    sleep(HZ/25);
+}
+
 
-        for (i = 0; i < 10000000; i++) {continue;}
 
-        GPBCON &= 0x2FFCFF;
-        GPBDAT |= 1<<5; 
-        GPBDAT |= 1<<6;
-    } else {
-        /* TODO how turn USB mode back off again? */
+void usb_enable(bool on)
+{
+    if (on)
+    {
+        /* make sure ata_en is high */    
+        USB_VPLUS_PWR_ASSERT;
+        USB_ATA_ENABLE;                
+    }
+    else
+    {
+        /* make sure ata_en is low */
+        USB_ATA_DISABLE;
+        USB_VPLUS_PWR_DEASSERT;
     }
+    
+    sleep(HZ/20); // > 50ms for detecting the enable state change
 }
diff --git a/firmware/target/arm/gigabeat/meg-fx/wmcodec-meg-fx.c b/firmware/target/arm/gigabeat/meg-fx/wmcodec-meg-fx.c
index 3835ce6c05..fd023e1be0 100644
--- a/firmware/target/arm/gigabeat/meg-fx/wmcodec-meg-fx.c
+++ b/firmware/target/arm/gigabeat/meg-fx/wmcodec-meg-fx.c
@@ -36,7 +36,6 @@
 #include "file.h"
 #include "buffer.h"
 #include "audio.h"
-#include "i2s.h"
 #include "i2c.h"
 #include "i2c-meg-fx.h"
 /*
@@ -53,11 +52,16 @@ void i2s_reset(void)
 int audiohw_init(void) {
     /* reset I2C */
     i2c_init();
+    
+    /* GPC5 controls headphone output */
+    GPCCON &= ~(0x3 << 10);
+    GPCCON |= (1 << 10);
+    GPCDAT |= (1 << 5);
 
     return 0;
 }
 
 void wmcodec_write(int reg, int data)
 {
-    i2c_send(0x34, (reg<<1) | ((data&0x100)>>8),data&0xff);
+    i2c_send(0x34, (reg<<1) | ((data&0x100)>>8), data&0xff);
 }
diff --git a/tools/configure b/tools/configure
index 4cb1f96291..53be8eee91 100755
--- a/tools/configure
+++ b/tools/configure
@@ -1031,7 +1031,7 @@ EOF
     target_id=20
     archos="gigabeatf"
     target="-DGIGABEAT_F"
-    memory=32 # always
+    memory=30 # always
     arm9tdmicc
     tool="cp"
     bmp2rb_mono="$rootdir/tools/bmp2rb -f 0"