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Implemented the reset line program and disabled fictitious automatic power-on reset for the Z80 test machine.

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This commit is contained in:
Thomas Harte 2017-06-01 22:31:04 -04:00
parent 35e045d7a7
commit c95c32a9fe
2 changed files with 31 additions and 1 deletions
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1
OSBindings/Mac/Clock SignalTests/Bridges/TestMachineZ80.mm
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@ -119,6 +119,7 @@ static CPU::Z80::Register registerForRegister(CSTestMachineZ80Register reg) {
- (instancetype)init {
if(self = [super init]) {
_processor = CPU::Z80::AllRAMProcessor::Processor();
_processor.reset_power_on();
_cppTrapHandler = new MachineTrapHandler(self);
_busOperationHandler = new BusOperationHandler(self);
_busOperationCaptures = [[NSMutableArray alloc] init];

31
Processors/Z80/Z80.hpp
View File

@ -657,7 +657,8 @@ template <class T> class Processor: public MicroOpScheduler<MicroOp> {
iff2_(false),
number_of_cycles_(0),
request_status_(Interrupt::PowerOn),
last_request_status_(Interrupt::PowerOn) {
last_request_status_(Interrupt::PowerOn),
irq_line_(false) {
set_flags(0xff);
assemble_base_page(base_page_, hl_, false, cb_page_);
@ -676,6 +677,12 @@ template <class T> class Processor: public MicroOpScheduler<MicroOp> {
assemble_fetch_decode_execute(fdcb_page_, 3);
assemble_fetch_decode_execute(ddcb_page_, 3);
MicroOp reset_program[] = Program(WAIT(3), {MicroOp::Reset});
reset_program_.resize(3);
reset_program_[0] = reset_program[0];
reset_program_[1] = reset_program[1];
reset_program_[2] = reset_program[2];
}
/*!
@ -1415,6 +1422,19 @@ template <class T> class Processor: public MicroOpScheduler<MicroOp> {
halt_mask_ = 0x00;
break;
#pragma mark - Interrupt handling
case MicroOp::Reset:
// TODO
// iff1_ = iff2_ = false;
// interrupt_mode_ = 0;
// pc_.full = 0;
// sp_.full = 0xffff;
// a_ = 0xff;
// set_flags(0xff);
// i_ = r_ = 0;
break;
#pragma mark - Internal bookkeeping
case MicroOp::SetInstructionPage:
@ -1643,6 +1663,15 @@ template <class T> class Processor: public MicroOpScheduler<MicroOp> {
else request_status_ &= ~Interrupt::Reset;
}
/*!
This emulation automatically sets itself up in power-on state at creation, which has the effect of triggering a
reset at the first opportunity. Use @c reset_power_on to disable that behaviour.
*/
inline void reset_power_on() {
request_status_ &= ~Interrupt::PowerOn;
last_request_status_ &= ~Interrupt::PowerOn;
}
/*!
For receivers of perform_machine_cycle only. Temporarily rejects the current machine
cycle, causing time to be rewinded to its beginning.