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Deviated from the data sheet, which seems likely to be correct. Hence removed a whole load of the temporary logging.

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This commit is contained in:
Thomas Harte 2016-12-26 12:48:49 -05:00
parent 742c5df367
commit 83c433c142
1 changed files with 20 additions and 13 deletions
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33
Components/1770/1770.cpp
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@ -563,7 +563,6 @@ void WD1770::posit_event(Event new_event_type)
});
distance_into_section_ = 0;
is_reading_data_ = true;
printf("\n");
goto type2_read_byte;
}
goto type2_read_data;
@ -571,7 +570,7 @@ void WD1770::posit_event(Event new_event_type)
type2_read_byte:
WAIT_FOR_EVENT(Event::Token);
if(latest_token_.type != Token::Byte) goto type2_read_byte;
data_ = latest_token_.byte_value; printf("%02x", data_);
data_ = latest_token_.byte_value;
update_status([] (Status &status) {
status.lost_data |= status.data_request;
status.data_request = true;
@ -580,7 +579,6 @@ void WD1770::posit_event(Event new_event_type)
if(distance_into_section_ == 128 << header_[3])
{
distance_into_section_ = 0;
printf("\n");
goto type2_check_crc;
}
goto type2_read_byte;
@ -633,7 +631,7 @@ void WD1770::posit_event(Event new_event_type)
if(is_double_density_)
{
write_raw_short(Storage::Encodings::MFM::MFMAddressMark);
write_byte((command_&0x01) ? Storage::Encodings::MFM::MFMDataAddressByte : Storage::Encodings::MFM::MFMDeletedDataAddressByte);
write_byte((command_&0x01) ? Storage::Encodings::MFM::MFMDeletedDataAddressByte : Storage::Encodings::MFM::MFMDataAddressByte);
}
else
{
@ -642,20 +640,25 @@ void WD1770::posit_event(Event new_event_type)
WAIT_FOR_EVENT(Event::DataWritten);
distance_into_section_ = 0;
printf("\n");
type2_write_loop:
write_byte(data_); printf("%02x", data_);
update_status([] (Status &status) {
status.data_request = true;
});
WAIT_FOR_EVENT(Event::DataWritten);
/*
This deviates from the data sheet slightly since that would prima facie request one more byte
of data than is actually written — the last time around the loop it has transferred from the
data register to the data shift register, set data request, written the byte, checked that data
request has been satified, then finally considers whether all bytes are done. Based on both
natural expectations and the way that emulated machines responded, I believe that to be a
documentation error.
*/
write_byte(data_);
distance_into_section_++;
if(distance_into_section_ == 128 << header_[3])
if(distance_into_section_ < 128 << header_[3])
{
printf("\n");
goto type2_write_crc;
update_status([] (Status &status) {
status.data_request = true;
});
}
WAIT_FOR_EVENT(Event::DataWritten);
if(status_.data_request)
{
@ -665,6 +668,10 @@ void WD1770::posit_event(Event new_event_type)
goto wait_for_command;
}
if(distance_into_section_ == 128 << header_[3])
{
goto type2_write_crc;
}
goto type2_write_loop;
type2_write_crc: