6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2024-12-23 20:29:42 +00:00
Code Issues Projects Releases Wiki Activity

Made an attempt at read address. So superficially that leaves only the force interrupts.

Browse Source
This commit is contained in:
Thomas Harte 2017-01-01 20:55:09 -05:00
parent f94f34f053
commit 0df9ce5a76
1 changed files with 39 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
Components/1770/1770.cpp
View File

@ -797,7 +797,45 @@ void WD1770::posit_event(Event new_event_type)
}
begin_read_address:
printf("!!!TODO: read address!!!\n");
index_hole_count_ = 0;
distance_into_section_ = 0;
read_address_get_header:
WAIT_FOR_EVENT(Event::IndexHole | Event::Token);
if(new_event_type == Event::Token)
{
if(!distance_into_section_ && latest_token_.type == Token::ID) {data_mode_ = DataMode::Reading; distance_into_section_++; }
else if(distance_into_section_ && distance_into_section_ < 7 && latest_token_.type == Token::Byte)
{
if(status_.data_request)
{
update_status([] (Status &status) {
status.lost_data = true;
});
goto wait_for_command;
}
header_[distance_into_section_ - 1] = data_ = latest_token_.byte_value;
track_ = header_[0];
update_status([] (Status &status) {
status.data_request = true;
});
distance_into_section_++;
if(distance_into_section_ == 7)
{
goto wait_for_command;
}
}
}
if(index_hole_count_ == 6)
{
update_status([] (Status &status) {
status.record_not_found = true;
});
goto wait_for_command;
}
goto read_address_get_header;
begin_read_track:
WAIT_FOR_EVENT(Event::IndexHole);