6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2024-09-07 12:54:34 +00:00
Code Issues Projects Releases Wiki Activity

Implemented single density version of format track.

Browse Source
This commit is contained in:
Thomas Harte 2017-08-14 13:03:17 -04:00
parent 0da02d3902
commit 7b8bb0297a
1 changed files with 37 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

72
Components/8272/i8272.cpp
View File

@ -531,32 +531,32 @@ void i8272::posit_event(int event_type) {
begin_writing(); begin_writing();
// Write start-of-track. // Write start-of-track.
// TODO: single density. if(get_is_double_density()) {
for(int c = 0; c < 80; c++) { for(int c = 0; c < 80; c++) write_byte(0x4e);
write_byte(0x4e); for(int c = 0; c < 12; c++) write_byte(0x00);
} for(int c = 0; c < 3; c++) write_raw_short(Storage::Encodings::MFM::MFMIndexSync);
for(int c = 0; c < 12; c++) { write_byte(Storage::Encodings::MFM::IndexAddressByte);
write_byte(0x00); for(int c = 0; c < 50; c++) write_byte(0x4e);
} } else {
for(int c = 0; c < 3; c++) { for(int c = 0; c < 40; c++) write_byte(0xff);
write_raw_short(Storage::Encodings::MFM::MFMIndexSync); for(int c = 0; c < 6; c++) write_byte(0x00);
} write_raw_short(Storage::Encodings::MFM::FMIndexAddressMark);
write_byte(Storage::Encodings::MFM::IndexAddressByte); for(int c = 0; c < 26; c++) write_byte(0xff);
for(int c = 0; c < 50; c++) {
write_byte(0x4e);
} }
WAIT_FOR_EVENT(Event::DataWritten); WAIT_FOR_EVENT(Event::DataWritten);
sector_ = 0; sector_ = 0;
format_track_write_sector: format_track_write_sector:
for(int c = 0; c < 12; c++) { if(get_is_double_density()) {
write_byte(0x00); for(int c = 0; c < 12; c++) write_byte(0x00);
for(int c = 0; c < 3; c++) write_raw_short(Storage::Encodings::MFM::MFMSync);
get_crc_generator().set_value(Storage::Encodings::MFM::MFMPostSyncCRCValue);
write_byte(Storage::Encodings::MFM::IDAddressByte);
} else {
for(int c = 0; c < 6; c++) write_byte(0x00);
get_crc_generator().reset();
write_raw_short(Storage::Encodings::MFM::FMIDAddressMark);
} }
for(int c = 0; c < 3; c++) {
write_raw_short(Storage::Encodings::MFM::MFMSync);
}
get_crc_generator().set_value(Storage::Encodings::MFM::MFMPostSyncCRCValue);
write_byte(Storage::Encodings::MFM::IDAddressByte);
// Write the sector header, obtaining its contents // Write the sector header, obtaining its contents
// from the processor. // from the processor.
@ -578,36 +578,38 @@ void i8272::posit_event(int event_type) {
write_crc(); write_crc();
// Write the sector body. // Write the sector body.
for(int c = 0; c < 22; c++) { if(get_is_double_density()) {
write_byte(0x4e); for(int c = 0; c < 22; c++) write_byte(0x4e);
for(int c = 0; c < 12; c++) write_byte(0x00);
for(int c = 0; c < 3; c++) write_raw_short(Storage::Encodings::MFM::MFMSync);
get_crc_generator().set_value(Storage::Encodings::MFM::MFMPostSyncCRCValue);
write_byte(Storage::Encodings::MFM::DataAddressByte);
} else {
for(int c = 0; c < 11; c++) write_byte(0xff);
for(int c = 0; c < 6; c++) write_byte(0x00);
get_crc_generator().reset();
write_raw_short(Storage::Encodings::MFM::FMDataAddressMark);
} }
for(int c = 0; c < 12; c++) {
write_byte(0x00);
}
for(int c = 0; c < 3; c++) {
write_raw_short(Storage::Encodings::MFM::MFMSync);
}
get_crc_generator().set_value(Storage::Encodings::MFM::MFMPostSyncCRCValue);
write_byte(Storage::Encodings::MFM::DataAddressByte);
for(int c = 0; c < (128 << command_[2]); c++) { for(int c = 0; c < (128 << command_[2]); c++) {
write_byte(command_[5]); write_byte(command_[5]);
} }
write_crc(); write_crc();
// Write the prescribed gap. // Write the prescribed gap.
for(int c = 0; c < command_[4]; c++) { if(get_is_double_density()) {
write_byte(0x4e); for(int c = 0; c < command_[4]; c++) write_byte(0x4e);
} else {
for(int c = 0; c < command_[4]; c++) write_byte(0xff);
} }
// Consider repeating. // Consider repeating.
sector_++; sector_++;
if(sector_ < command_[3]) { if(sector_ < command_[3])
goto format_track_write_sector; goto format_track_write_sector;
}
// Otherwise, pad out to the index hole. // Otherwise, pad out to the index hole.
format_track_pad: format_track_pad:
write_byte(0x4e); write_byte(get_is_double_density() ? 0x4e : 0xff);
WAIT_FOR_EVENT((int)Event::DataWritten | (int)Event::IndexHole); WAIT_FOR_EVENT((int)Event::DataWritten | (int)Event::IndexHole);
if(event_type != (int)Event::IndexHole) goto format_track_pad; if(event_type != (int)Event::IndexHole) goto format_track_pad;