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Made an effort to start inspecting ID fields, at least. Discovered that my emulation has somehow stopped proceeding beyond sense interrupt status though. Fix one in that area: adjust ST0 just in time for the sense interrupt status response, as that'll need to specify the drive number properly.

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This commit is contained in:
Thomas Harte 2017-08-06 18:06:20 -04:00
parent e6d4bb29d8
commit 1c9a744b01
2 changed files with 25 additions and 1 deletions
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23
Components/8272/i8272.cpp
View File

@ -56,7 +56,7 @@ void i8272::run_for(Cycles cycles) {
(drives_[c].target_head_position == (int)drives_[c].head_position) ||
(drives_[c].drive.get_is_track_zero() && drives_[c].target_head_position == -1)) {
drives_[c].phase = Drive::CompletedSeeking;
status_[0] = (uint8_t)c | 0x20;
if(drives_[c].target_head_position == -1) drives_[c].head_position = 0;
main_status_ &= ~(1 << c);
} else {
int direction = (drives_[c].target_head_position < drives_[c].head_position) ? -1 : 1;
@ -105,6 +105,24 @@ void i8272::set_disk(std::shared_ptr<Storage::Disk::Disk> disk, int drive) {
#define WAIT_FOR_EVENT(mask) resume_point_ = __LINE__; interesting_event_mask_ = (int)mask; return; case __LINE__:
#define FIND_HEADER() \
{ \
find_header: WAIT_FOR_EVENT(Event::Token); \
if(get_latest_token().type != Token::ID) goto find_header; \
}
#define READ_HEADER() \
distance_into_header_ = 0; \
set_data_mode(Reading); \
{ \
read_header: WAIT_FOR_EVENT(Event::Token); \
header_[distance_into_header_] = get_latest_token().byte_value; \
distance_into_header_++; \
if(distance_into_header_ != 7) goto read_header; \
} \
set_data_mode(Scanning);
void i8272::posit_event(int type) {
if(!(interesting_event_mask_ & type)) return;
interesting_event_mask_ &= ~type;
@ -185,6 +203,8 @@ void i8272::posit_event(int type) {
}
read_data:
FIND_HEADER();
READ_HEADER();
printf("Read data unimplemented!!\n");
goto wait_for_command;
@ -248,6 +268,7 @@ void i8272::posit_event(int type) {
if(found_drive != -1) {
drives_[found_drive].phase = Drive::NotSeeking;
result_.push_back(drives_[found_drive].head_position);
status_[0] = (uint8_t)found_drive | 0x20;
result_.push_back(status_[0]);
} else {
result_.push_back(0x80);

3
Components/8272/i8272.hpp
View File

@ -67,6 +67,9 @@ class i8272: public Storage::Disk::MFMController {
Drive() : head_position(0), phase(NotSeeking) {};
} drives_[4];
uint8_t header_[6];
int distance_into_header_;
};
}