Rockboy - gameboy emulation for rockbox, based on gnuboy. Still a bit early, but already playable on iRiver H1xx and the simulators. The archos recorder version is currently rather slow...

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6104 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 135 insertions, 0 deletions

diff --git a/apps/plugins/rockboy/rtc.c b/apps/plugins/rockboy/rtc.c
new file mode 100644
index 0000000000..99e71dcfae
--- /dev/null
+++ b/apps/plugins/rockboy/rtc.c
@@ -0,0 +1,135 @@
+
+
+
+#include "rockmacros.h"
+#include <stdio.h>
+
+#include "defs.h"
+#include "mem.h"
+#include "rtc.h"
+#include "rc.h"
+
+struct rtc rtc;
+
+static int syncrtc = 1;
+
+rcvar_t rtc_exports[] =
+{
+        RCV_BOOL("syncrtc", &syncrtc),
+        RCV_END
+};
+
+
+void rtc_latch(byte b)
+{
+        if ((rtc.latch ^ b) & b & 1)
+        {
+                rtc.regs[0] = rtc.s;
+                rtc.regs[1] = rtc.m;
+                rtc.regs[2] = rtc.h;
+                rtc.regs[3] = rtc.d;
+                rtc.regs[4] = (rtc.d>>9) | (rtc.stop<<6) | (rtc.carry<<7);
+                rtc.regs[5] = 0xff;
+                rtc.regs[6] = 0xff;
+                rtc.regs[7] = 0xff;
+        }
+        rtc.latch = b;
+}
+
+void rtc_write(byte b)
+{
+        /* printf("write %02X: %02X (%d)\n", rtc.sel, b, b); */
+        if (!(rtc.sel & 8)) return;
+        switch (rtc.sel & 7)
+        {
+        case 0:
+                rtc.s = rtc.regs[0] = b;
+                while (rtc.s >= 60) rtc.s -= 60;
+                break;
+        case 1:
+                rtc.m = rtc.regs[1] = b;
+                while (rtc.m >= 60) rtc.m -= 60;
+                break;
+        case 2:
+                rtc.h = rtc.regs[2] = b;
+                while (rtc.h >= 24) rtc.h -= 24;
+                break;
+        case 3:
+                rtc.regs[3] = b;
+                rtc.d = (rtc.d & 0x100) | b;
+                break;
+        case 4:
+                rtc.regs[4] = b;
+                rtc.d = (rtc.d & 0xff) | ((b&1)<<9);
+                rtc.stop = (b>>6)&1;
+                rtc.carry = (b>>7)&1;
+                break;
+        }
+}
+
+void rtc_tick()
+{
+        if (rtc.stop) return;
+        if (++rtc.t == 60)
+        {
+                if (++rtc.s == 60)
+                {
+                        if (++rtc.m == 60)
+                        {
+                                if (++rtc.h == 24)
+                                {
+                                        if (++rtc.d == 365)
+                                        {
+                                                rtc.d = 0;
+                                                rtc.carry = 1;
+                                        }
+                                        rtc.h = 0;
+                                }
+                                rtc.m = 0;
+                        }
+                        rtc.s = 0;
+                }
+                rtc.t = 0;
+        }
+}
+
+void rtc_save_internal(int fd)
+{
+        (void)fd; // stop compiler complaining
+        // TODO
+//      fprintf(f, "%d %d %d %02d %02d %02d %02d\n%d\n",
+//              rtc.carry, rtc.stop, rtc.d, rtc.h, rtc.m, rtc.s, rtc.t,
+//              time(0));
+}
+
+void rtc_load_internal(int fd)
+{
+        //int rt = 0;
+        (void)fd; // stop compiler complaining
+        // TODO
+/*      fscanf(
+                f, "%d %d %d %02d %02d %02d %02d\n%d\n",
+                &rtc.carry, &rtc.stop, &rtc.d,
+                &rtc.h, &rtc.m, &rtc.s, &rtc.t, &rt);
+        while (rtc.t >= 60) rtc.t -= 60;
+        while (rtc.s >= 60) rtc.s -= 60;
+        while (rtc.m >= 60) rtc.m -= 60;
+        while (rtc.h >= 24) rtc.h -= 24;
+        while (rtc.d >= 365) rtc.d -= 365;
+        rtc.stop &= 1;
+        rtc.carry &= 1;
+        if (rt) rt = (time(0) - rt) * 60;
+        if (syncrtc) while (rt-- > 0) rtc_tick(); */
+}
+
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