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Started splitting ZX80 and ZX81 paths. Also the '80 fires its horizontal sync a little earlier than the '81, so pulled that back a little.

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This commit is contained in:
Thomas Harte 2017-06-13 20:09:09 -04:00
parent 4c5261bfa0
commit 1e975859c2
1 changed files with 18 additions and 9 deletions
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27
Machines/ZX8081/ZX8081.cpp
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@ -27,18 +27,27 @@ Machine::Machine() :
} }
int Machine::perform_machine_cycle(const CPU::Z80::MachineCycle &cycle) { int Machine::perform_machine_cycle(const CPU::Z80::MachineCycle &cycle) {
const int vsync_length = 16;
int previous_counter = horizontal_counter_; int previous_counter = horizontal_counter_;
horizontal_counter_ += cycle.length; horizontal_counter_ += cycle.length;
if(previous_counter < 16 && horizontal_counter_ >= 16) {
video_->run_for_cycles(16 - previous_counter); if(is_zx81_) {
set_hsync(true);
video_->run_for_cycles(horizontal_counter_ - 16);
} else if(previous_counter < 32 && horizontal_counter_ >= 32) {
video_->run_for_cycles(32 - previous_counter);
set_hsync(false);
video_->run_for_cycles(horizontal_counter_ - 32);
} else { } else {
video_->run_for_cycles(cycle.length); const int vsync_start_cycle = 13;
const int vsync_end_cycle = vsync_start_cycle + vsync_length;
if(previous_counter < vsync_start_cycle && horizontal_counter_ >= vsync_start_cycle) {
video_->run_for_cycles(vsync_start_cycle - previous_counter);
set_hsync(true);
video_->run_for_cycles(horizontal_counter_ - vsync_start_cycle);
} else if(previous_counter < vsync_end_cycle && horizontal_counter_ >= vsync_end_cycle) {
video_->run_for_cycles(vsync_end_cycle - previous_counter);
set_hsync(false);
video_->run_for_cycles(horizontal_counter_ - vsync_end_cycle);
} else {
video_->run_for_cycles(cycle.length);
}
} }
// tape_player_.run_for_cycles(cycle.length); // tape_player_.run_for_cycles(cycle.length);