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Corrects and introduces new parts.

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This commit is contained in:
Thomas Harte 2019-07-12 21:37:33 -04:00
parent d53d1c616f
commit 1d1e0d74f8
1 changed files with 17 additions and 14 deletions
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31
Components/DiskII/IWM.cpp
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@ -139,13 +139,13 @@ void IWM::write(int address, uint8_t input) {
case Q7|Q6|ENABLE: // Write data register.
LOG("Data register write");
// if(write_handshake_ & 0x80) {
// shift_register_ = input;
// output_bits_remaining_ = 8;
// } else {
// next_output_ = input;
// write_handshake_ &= ~0x80;
// }
if(write_handshake_ & 0x80) {
shift_register_ = input;
output_bits_remaining_ = 8;
} else {
next_output_ = input;
write_handshake_ &= ~0x80;
}
break;
}
}
@ -282,7 +282,7 @@ void IWM::run_for(const Cycles cycles) {
}
break;
/* case ShiftMode::Writing:
case ShiftMode::Writing:
while(cycles_since_shift_ + integer_cycles >= bit_length_) {
const auto cycles_until_write = cycles_since_shift_ + integer_cycles - bit_length_;
drives_[active_drive_]->run_for(cycles_until_write);
@ -307,13 +307,14 @@ void IWM::run_for(const Cycles cycles) {
}
cycles_since_shift_ = integer_cycles;
break;*/
break;
// case ShiftMode::CheckingWriteProtect:
// while(--integer_cycles) {
// shift_register_ = (shift_register_ >> 1) | sense();
// }
// break;
case ShiftMode::CheckingWriteProtect:
if(drive_is_rotating_[active_drive_]) drives_[active_drive_]->run_for(cycles);
while(--integer_cycles) {
shift_register_ = (shift_register_ >> 1) | sense();
}
break;
default:
if(drive_is_rotating_[active_drive_]) drives_[active_drive_]->run_for(cycles);
@ -326,6 +327,8 @@ uint8_t IWM::sense() {
}
void IWM::process_event(const Storage::Disk::Drive::Event &event) {
if(shift_mode_ != ShiftMode::Reading) return;
switch(event.type) {
case Storage::Disk::Track::Event::IndexHole: return;
case Storage::Disk::Track::Event::FluxTransition: