static UInt8 readIo(Svi328Fdc* rm, UInt16 ioPort)
{
switch (ioPort) {
case 0x30:
return wd2793GetStatusReg(rm->fdc);
case 0x31:
return wd2793GetTrackReg(rm->fdc);
case 0x32:
return wd2793GetSectorReg(rm->fdc);
case 0x33:
return wd2793GetDataReg(rm->fdc);
case 0x34:
return (wd2793GetIrq(rm->fdc) ? 0x80:0) | (wd2793GetDataRequest(rm->fdc) ? 0x40:0);
}
return 0xff;
}
static UInt8 readIo(Microsol* rm, UInt16 ioPort)
{
switch (ioPort) {
case 0xd0:
return wd2793GetStatusReg(rm->fdc);
case 0xd1:
return wd2793GetTrackReg(rm->fdc);
case 0xd2:
return wd2793GetSectorReg(rm->fdc);
case 0xd3:
return wd2793GetDataReg(rm->fdc);
case 0xd4:
return 0x3f |
(wd2793GetIrq(rm->fdc) ? 0x80 : 0) |
(wd2793GetDataRequest(rm->fdc) ? 0 : 0x40);
}
return 0xff;
}
static UInt8 read(RomMapperNationalFdc* rm, UInt16 address)
{
switch (address & 0x3fc7) {
case 0x3f80:
return wd2793GetStatusReg(rm->fdc);
case 0x3f81:
return wd2793GetTrackReg(rm->fdc);
case 0x3f82:
return wd2793GetSectorReg(rm->fdc);
case 0x3f83:
return wd2793GetDataReg(rm->fdc);
case 0x3f84:
case 0x3f85:
case 0x3f86:
case 0x3f87:
return (wd2793GetIrq(rm->fdc) ? 0x80 : 0) | (wd2793GetDataRequest(rm->fdc) ? 0 : 0x40) | 0x3f;
}
return address < 0x4000 ? rm->romData[address] : 0xff;
}
static UInt8 read(RomMapperPhilipsFdc* rm, UInt16 address)
{
switch (address & 0x3fff) {
case 0x3ff8:
return wd2793GetStatusReg(rm->fdc);
case 0x3ff9:
return wd2793GetTrackReg(rm->fdc);
case 0x3ffa:
return wd2793GetSectorReg(rm->fdc);
case 0x3ffb:
return wd2793GetDataReg(rm->fdc);
case 0x3ffc:
return rm->sideReg;
case 0x3ffd:
return rm->driveReg;
case 0x3ffe:
return 0xff;
case 0x3fff:
return (wd2793GetIrq(rm->fdc) ? 0 : 0x40) | (wd2793GetDataRequest(rm->fdc) ? 0 : 0x80);
}
return address < 0x4000 ? rm->romData[address] : 0xff;
}