6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2024-11-26 23:52:26 +00:00
Code Issues Projects Releases Wiki Activity

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.

Browse Source
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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_;
};
}