static void fhfileOpen(void) {
if (cpuGetDReg(0) < FHFILE_MAX_DEVICES) {
memoryWriteByte(7, cpuGetAReg(1) + 8); /* ln_type (NT_REPLYMSG) */
memoryWriteByte(0, cpuGetAReg(1) + 31); /* io_error */
memoryWriteLong(cpuGetDReg(0), cpuGetAReg(1) + 24); /* io_unit */
memoryWriteLong(memoryReadLong(cpuGetAReg(6) + 32) + 1, cpuGetAReg(6) + 32); /* LIB_OPENCNT */
cpuSetDReg(0, 0); /* ? */
}
else {
memoryWriteLong(-1, cpuGetAReg(1) + 20);
memoryWriteByte(-1, cpuGetAReg(1) + 31); /* io_error */
cpuSetDReg(0, -1); /* ? */
}
}
static void fhfileBeginIO(void) {
BYT error = 0;
ULO unit = memoryReadLong(cpuGetAReg(1) + 24);
UWO cmd = memoryReadWord(cpuGetAReg(1) + 28);
switch (cmd) {
case 2:
error = fhfileRead(unit);
break;
case 3:
case 11:
error = fhfileWrite(unit);
break;
case 18:
fhfileGetDriveType(unit);
break;
case 19:
fhfileGetNumberOfTracks(unit);
break;
case 15:
fhfileWriteProt(unit);
break;
case 4:
case 5:
case 9:
case 10:
case 12:
case 13:
case 14:
case 20:
case 21:
fhfileIgnore(unit);
break;
default:
error = -3;
cpuSetDReg(0, 0);
break;
}
memoryWriteByte(5, cpuGetAReg(1) + 8); /* ln_type */
memoryWriteByte(error, cpuGetAReg(1) + 31); /* ln_error */
}
void mmuWriteByte(Word vAddr, Byte data, Bool userMode) {
memoryWriteByte(v2p(vAddr, userMode, true, MMU_ACCS_BYTE), data);
}
