139 lines
2.6 KiB
C
139 lines
2.6 KiB
C
|
|
||
|
|
|
||
|
|
#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
|
||
|
|
|