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Implements unconditional force interrupt for the WD.

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This commit is contained in:
Thomas Harte 2018-01-07 19:42:38 -05:00
parent 513c067f94
commit 793ef68206
2 changed files with 23 additions and 7 deletions
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27
Components/1770/1770.cpp
View File

@ -23,10 +23,16 @@ void WD1770::set_register(int address, uint8_t value) {
switch(address&3) {
case 0: {
if((value&0xf0) == 0xd0) {
printf("!!!TODO: force interrupt!!!\n");
update_status([] (Status &status) {
status.type = Status::One;
});
if(value == 0xd0) {
// Force interrupt **immediately**.
printf("Force interrupt immediately\n");
posit_event(static_cast<int>(Event1770::ForceInterrupt));
} else {
printf("!!!TODO: force interrupt!!!\n");
update_status([] (Status &status) {
status.type = Status::One;
});
}
} else {
command_ = value;
posit_event(static_cast<int>(Event1770::Command));
@ -169,13 +175,22 @@ void WD1770::posit_event(int new_event_type) {
}
}
if(!(interesting_event_mask_ & static_cast<int>(new_event_type))) return;
interesting_event_mask_ &= ~new_event_type;
if(new_event_type == static_cast<int>(Event1770::ForceInterrupt)) {
interesting_event_mask_ = 0;
resume_point_ = 0;
update_status([] (Status &status) {
status.type = Status::One;
});
} else {
if(!(interesting_event_mask_ & static_cast<int>(new_event_type))) return;
interesting_event_mask_ &= ~new_event_type;
}
Status new_status;
BEGIN_SECTION()
// Wait for a new command, branch to the appropriate handler.
case 0:
wait_for_command:
printf("Idle...\n");
set_data_mode(DataMode::Scanning);

3
Components/1770/1770.hpp
View File

@ -116,7 +116,8 @@ class WD1770: public Storage::Disk::MFMController {
Command = (1 << 3), // Indicates receipt of a new command.
HeadLoad = (1 << 4), // Indicates the head has been loaded (1973 only).
Timer = (1 << 5), // Indicates that the delay_time_-powered timer has timed out.
IndexHoleTarget = (1 << 6) // Indicates that index_hole_count_ has reached index_hole_count_target_.
IndexHoleTarget = (1 << 6), // Indicates that index_hole_count_ has reached index_hole_count_target_.
ForceInterrupt = (1 << 7) // Indicates a forced interrupt.
};
void posit_event(int type);
int interesting_event_mask_;