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egc.c
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#include "compiler.h"
#include "cpucore.h"
#include "pccore.h"
#include "iocore.h"
#include "memegc.h"
#include "vram.h"
// エンディアン修正しる。
static const UINT16 maskword[16][4] = {
{0x0000,0x0000,0x0000,0x0000}, {0xffff,0x0000,0x0000,0x0000},
{0x0000,0xffff,0x0000,0x0000}, {0xffff,0xffff,0x0000,0x0000},
{0x0000,0x0000,0xffff,0x0000}, {0xffff,0x0000,0xffff,0x0000},
{0x0000,0xffff,0xffff,0x0000}, {0xffff,0xffff,0xffff,0x0000},
{0x0000,0x0000,0x0000,0xffff}, {0xffff,0x0000,0x0000,0xffff},
{0x0000,0xffff,0x0000,0xffff}, {0xffff,0xffff,0x0000,0xffff},
{0x0000,0x0000,0xffff,0xffff}, {0xffff,0x0000,0xffff,0xffff},
{0x0000,0xffff,0xffff,0xffff}, {0xffff,0xffff,0xffff,0xffff}};
static void IOOUTCALL egc_o4a0(UINT port, REG8 value) {
if (!(vramop.operate & (1 << VOPBIT_EGC))) {
return;
}
// TRACEOUT(port, value);
switch(port & 0x000f) {
case 0x00:
egc.access &= 0xff00;
egc.access |= value;
break;
case 0x01:
egc.access &= 0x00ff;
egc.access |= value << 8;
break;
case 0x02:
egc.fgbg &= 0xff00;
egc.fgbg |= value;
break;
case 0x03:
egc.fgbg &= 0x00ff;
egc.fgbg |= value << 8;
break;
case 0x04:
egc.ope &= 0xff00;
egc.ope |= value;
break;
case 0x05:
egc.ope &= 0x00ff;
egc.ope |= value << 8;
break;
case 0x06:
egc.fg &= 0xff00;
egc.fg |= value;
egc.fgc.d[0] = *(UINT32 *)(maskword[value & 15] + 0);
egc.fgc.d[1] = *(UINT32 *)(maskword[value & 15] + 2);
break;
case 0x07:
egc.fg &= 0x00ff;
egc.fg |= value << 8;
break;
case 0x08:
if (!(egc.fgbg & 0x6000)) {
egc.mask._b[0] = value;
}
break;
case 0x09:
if (!(egc.fgbg & 0x6000)) {
egc.mask._b[1] = value;
}
break;
case 0x0a:
egc.bg &= 0xff00;
egc.bg |= value;
egc.bgc.d[0] = *(UINT32 *)(maskword[value & 15] + 0);
egc.bgc.d[1] = *(UINT32 *)(maskword[value & 15] + 2);
break;
case 0x0b:
egc.bg &= 0x00ff;
egc.bg |= value << 8;
break;
case 0x0c:
egc.sft &= 0xff00;
egc.sft |= value;
egcshift();
egc.srcmask.w = 0xffff;
break;
case 0x0d:
egc.sft &= 0x00ff;
egc.sft |= value << 8;
egcshift();
egc.srcmask.w = 0xffff;
break;
case 0x0e:
egc.leng &= 0xff00;
egc.leng |= value;
egcshift();
egc.srcmask.w = 0xffff;
break;
case 0x0f:
egc.leng &= 0x00ff;
egc.leng |= value << 8;
egcshift();
egc.srcmask.w = 0xffff;
break;
}
}
void egc_reset(const NP2CFG *pConfig) {
ZeroMemory(&egc, sizeof(egc));
egc.access = 0xfff0;
egc.fgbg = 0x00ff;
egc.mask.w = 0xffff;
egc.leng = 0x000f;
egcshift();
egc.srcmask.w = 0xffff;
(void)pConfig;
}
void egc_bind(void) {
UINT i;
for (i=0; i<16; i++) {
iocore_attachout(0x04a0 + i, egc_o4a0);
}
}
void IOOUTCALL egc_w16(UINT port, REG16 value) {
if (!(vramop.operate & (1 << VOPBIT_EGC))) {
return;
}
// TRACEOUTW(port, value);
switch(port & 0x000f) {
case 0x00:
egc.access = value;
break;
case 0x02:
egc.fgbg = value;
break;
case 0x04:
egc.ope = value;
break;
case 0x06:
egc.fg = value;
egc.fgc.d[0] = *(UINT32 *)(maskword[value & 15] + 0);
egc.fgc.d[1] = *(UINT32 *)(maskword[value & 15] + 2);
break;
case 0x08:
if (!(egc.fgbg & 0x6000)) {
egc.mask.w = value;
}
break;
case 0x0a:
egc.bg = value;
egc.bgc.d[0] = *(UINT32 *)(maskword[value & 15] + 0);
egc.bgc.d[1] = *(UINT32 *)(maskword[value & 15] + 2);
break;
case 0x0c:
egc.sft = value;
egcshift();
egc.srcmask.w = 0xffff;
break;
case 0x0e:
egc.leng = value;
egcshift();
egc.srcmask.w = 0xffff;
break;
}
}