1 files changed, 138 insertions, 0 deletions

diff --git a/apps/plugins/rockboy/fastmem.c b/apps/plugins/rockboy/fastmem.c
new file mode 100644
index 0000000000..ffb0ed5371
--- /dev/null
+++ b/apps/plugins/rockboy/fastmem.c
@@ -0,0 +1,138 @@
+
+
+#include "rockmacros.h"
+#include "fastmem.h"
+
+
+#define D 0 /* direct */
+#define C 1 /* direct cgb-only */
+#define R 2 /* io register */
+#define S 3 /* sound register */
+#define W 4 /* wave pattern */
+
+#define F 0xFF /* fail */
+
+const byte himask[256];
+
+const byte hi_rmap[256] =
+{
+        0, 0, R, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+        S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, S,
+        S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, S,
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, C, 0, C,
+        0, C, C, C, C, C, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0, 0, 0, 0, C, C, C, C, 0, 0, 0, 0,
+        C, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+const byte hi_wmap[256] =
+{
+        R, R, R, R, R, R, R, R, R, R, R, R, R, R, R, R,
+        S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, S,
+        S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, S,
+        S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, S,
+        R, R, R, R, R, R, R, R, R, R, R, R, 0, R, 0, R,
+        0, C, C, C, C, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0, 0, 0, 0, R, R, R, R, 0, 0, 0, 0,
+        R, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+        
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, R
+};
+
+
+byte readb(int a)
+{
+        byte *p = mbc.rmap[a>>12];
+        if (p) return p[a];
+        else return mem_read(a);
+}
+
+void writeb(int a, byte b)
+{
+        byte *p = mbc.wmap[a>>12];
+        if (p) p[a] = b;
+        else mem_write(a, b);
+}
+
+int readw(int a)
+{
+        if ((a+1) & 0xfff)
+        {
+                byte *p = mbc.rmap[a>>12];
+                if (p)
+                {
+#ifdef LITTLE_ENDIAN
+#ifndef ALLOW_UNALIGNED_IO
+                        if (a&1) return p[a] | (p[a+1]<<8);
+#endif
+                        return *(word *)(p+a);
+#else
+                        return p[a] | (p[a+1]<<8);
+#endif
+                }
+        }
+        return mem_read(a) | (mem_read(a+1)<<8);
+}
+
+void writew(int a, int w)
+{
+        if ((a+1) & 0xfff)
+        {
+                byte *p = mbc.wmap[a>>12];
+                if (p)
+                {
+#ifdef LITTLE_ENDIAN
+#ifndef ALLOW_UNALIGNED_IO
+                        if (a&1)
+                        {
+                                p[a] = w;
+                                p[a+1] = w >> 8;
+                                return;
+                        }
+#endif
+                        *(word *)(p+a) = w;
+                        return;
+#else
+                        p[a] = w;
+                        p[a+1] = w >> 8;
+                        return;
+#endif
+                }
+        }
+        mem_write(a, w);
+        mem_write(a+1, w>>8);
+}
+
+byte readhi(int a)
+{
+        return readb(a | 0xff00);
+}
+
+void writehi(int a, byte b)
+{
+        writeb(a | 0xff00, b);
+}
+
+#if 0
+byte readhi(int a)
+{
+        byte (*rd)() = hi_read[a];
+        return rd ? rd(a) : (ram.hi[a] | himask[a]);
+}
+
+void writehi(int a, byte b)
+{
+        byte (*wr)() = hi_write[a];
+        if (wr) wr(a, b);
+        else ram.hi[a] = b & ~himask[a];
+}
+#endif
+