static void writeA(RomMapperRsIde* rm, UInt8 value)
{
rm->ideAddress = value & 0x07;
rm->ideIoRead = value & 0x40 ? 0:1;
rm->ideIoWrite = value & 0x20 ? 0:1;
if (rm->ideIoRead)
{
switch (rm->ideAddress)
{
case 0:
rm->ideData = harddiskIdeRead(rm->hdide);
break;
default:
rm->ideData = harddiskIdeReadRegister(rm->hdide, rm->ideAddress);
break;
}
}
if (rm->ideIoWrite)
{
switch (rm->ideAddress)
{
case 0:
harddiskIdeWrite(rm->hdide, rm->ideData);
break;
default:
harddiskIdeWriteRegister(rm->hdide, rm->ideAddress, (UInt8)rm->ideData);
break;
}
}
}
static UInt8 readIo(RomMapperGIde* rm, UInt16 ioPort)
{
switch (ioPort & 0x0f)
{
case 0x04: // Reserved for expansion board
return 0xff;
case 0x05: // RTC 72421
return rtc72421Read(ioPort >> 8);
case 0x06: // GIDE alternate status
return rm->altStatus;
case 0x07: // GIDE drive address register
return rm->drvSelect;
case 0x08: // IDE data register
return (UInt8)harddiskIdeRead(rm->hdide);
case 0x09: // IDE error register
return harddiskIdeReadRegister(rm->hdide, 1);
case 0x0a: // IDE sector count register
return harddiskIdeReadRegister(rm->hdide, 2);
case 0x0b: // IDE sector number register
return harddiskIdeReadRegister(rm->hdide, 3);
case 0x0c: // IDE cylinder low register
return harddiskIdeReadRegister(rm->hdide, 4);
case 0x0d: // IDE cylinder high register
return harddiskIdeReadRegister(rm->hdide, 5);
case 0x0e: // IDE drive/head register
return harddiskIdeReadRegister(rm->hdide, 6);
case 0x0f: // IDE status register
rm->altStatus = harddiskIdeReadRegister(rm->hdide, 7);
return rm->altStatus;
}
return 0xff;
}
UInt8 sunriseIdeReadRegister(SunriseIde* ide, UInt8 reg)
{
UInt8 value;
if (reg == 14) {
reg = 7;
}
if (ide->softReset) {
return 0x7f | (reg == 7 ? 0x80 : 0);
}
if (reg == 0) {
return sunriseIdeRead(ide) & 0xFF;
}
value = harddiskIdeReadRegister(ide->hdide[ide->currentDevice], reg);
if (reg == 6) {
value = (value & ~0x10) | (ide->currentDevice << 4);
}
return value;
}
UInt8 harddiskIdePeekRegister(HarddiskIde* hd, UInt8 reg)
{
return harddiskIdeReadRegister(hd, reg);
}
