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Do something on a write rather than nothing.

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This commit is contained in:
Thomas Harte 2023-12-07 16:45:21 -05:00
parent ac47b93542
commit 1985d7da6a
2 changed files with 31 additions and 7 deletions
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12
Components/8272/Status.hpp
View File

@ -47,12 +47,12 @@ enum class Status1: uint8_t {
};
enum class Status2: uint8_t {
DeletedControlMark = 0x40,
DataCRCError = 0x20,
WrongCyinder = 0x10,
ScanEqualHit = 0x08,
ScanNotSatisfied = 0x04,
BadCylinder = 0x02,
DeletedControlMark = 0x40,
DataCRCError = 0x20,
WrongCyinder = 0x10,
ScanEqualHit = 0x08,
ScanNotSatisfied = 0x04,
BadCylinder = 0x02,
MissingDataAddressMark = 0x01,
};

26
Machines/PCCompatible/PCCompatible.cpp
View File

@ -113,6 +113,28 @@ class FloppyController {
printf("TODO: implement FDC command %d\n", uint8_t(decoder_.command()));
break;
case Command::WriteDeletedData:
case Command::WriteData: {
status_.begin(decoder_);
// Just decline to write, for now.
status_.set(Intel::i8272::Status1::NotWriteable);
status_.set(Intel::i8272::Status0::AbnormalTermination);
results_.serialise(
status_,
decoder_.geometry().cylinder,
decoder_.geometry().head,
decoder_.geometry().sector,
decoder_.geometry().size);
// TODO: what if head has changed?
drives_[decoder_.target().drive].status = decoder_.drive_head();
drives_[decoder_.target().drive].raised_interrupt = true;
pic_.apply_edge<6>(true);
} break;
case Command::ReadDeletedData:
case Command::ReadData: {
printf("FDC: Read from drive %d / head %d / track %d of head %d / track %d / sector %d\n",
decoder_.target().drive,
@ -131,11 +153,13 @@ class FloppyController {
bool found_sector = false;
for(auto &pair: drives_[decoder_.target().drive].sectors(decoder_.target().head)) {
// TODO: I suspect that not all these fields are tested for equality.
if(
(pair.second.address.track == target.cylinder) &&
(pair.second.address.sector == target.sector) &&
(pair.second.address.side == target.head) &&
(pair.second.size == target.size)
(pair.second.size == target.size) &&
(pair.second.is_deleted == (decoder_.command() == Command::ReadDeletedData))
) {
found_sector = true;
bool wrote_in_full = true;