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https://github.com/TomHarte/CLK.git
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Added a block on the tape motor for a short period after each time the ROM routine is intercepted for a substituted byte read. To reduce the collision between fast tape and real tape loading.
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@ -22,7 +22,8 @@ Machine::Machine() :
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hsync_(false),
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nmi_is_enabled_(false),
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tape_player_(ZX8081ClockRate),
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use_fast_tape_hack_(false) {
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use_fast_tape_hack_(false),
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tape_advance_delay_(0) {
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set_clock_rate(ZX8081ClockRate);
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tape_player_.set_motor_control(true);
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clear_all_keys();
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@ -53,7 +54,11 @@ int Machine::perform_machine_cycle(const CPU::Z80::PartialMachineCycle &cycle) {
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}
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if(is_zx81_) horizontal_counter_ %= 207;
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if(!use_fast_tape_hack_) tape_player_.run_for_cycles(cycle.length);
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if(!tape_advance_delay_) {
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tape_player_.run_for_cycles(cycle.length);
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} else {
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tape_advance_delay_ = std::max(tape_advance_delay_ - cycle.length, 0);
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}
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if(nmi_is_enabled_ && !get_halt_line() && get_non_maskable_interrupt_line()) {
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set_wait_line(true);
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@ -132,6 +137,11 @@ int Machine::perform_machine_cycle(const CPU::Z80::PartialMachineCycle &cycle) {
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ram_[hl & ram_mask_] = (uint8_t)next_byte;
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*cycle.value = 0x00;
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set_value_of_register(CPU::Z80::Register::ProgramCounter, tape_return_address_ - 1);
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// Assume that having read one byte quickly, we're probably going to be asked to read
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// another shortly. Therefore, temporarily disable the tape motor for 1000 cycles in order
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// to avoid fighting with real time. This is a stop-gap fix.
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tape_advance_delay_ = 1000;
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return 0;
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} else {
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tape_player_.get_tape()->seek(time);
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@ -94,6 +94,7 @@ class Machine:
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uint8_t latched_video_byte_;
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bool use_fast_tape_hack_;
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int tape_advance_delay_;
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};
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}
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