6502/CLK
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This'll probably do for now.

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This commit is contained in:
Thomas Harte 2016-03-24 22:20:00 -04:00
parent f1caf62ff2
commit a6ef78862c
1 changed files with 15 additions and 9 deletions
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24
Processors/6502/CPU6502.hpp
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@ -551,6 +551,9 @@ template <class T> class Processor {
unsigned int scheduleProgramsReadPointer = _scheduleProgramsReadPointer;
unsigned int scheduleProgramProgramCounter = _scheduleProgramProgramCounter;
RegisterPair nextAddress = _nextAddress;
BusOperation nextBusOperation = _nextBusOperation;
uint16_t busAddress = _busAddress;
uint8_t *busValue = _busValue;
#define checkSchedule(op) \
if(!_scheduledPrograms[scheduleProgramsReadPointer]) {\
@ -574,25 +577,25 @@ template <class T> class Processor {
while(number_of_cycles > 0) {
while (_ready_is_active && number_of_cycles > 0) {
number_of_cycles -= static_cast<T *>(this)->perform_bus_operation(BusOperation::Ready, _busAddress, _busValue);
number_of_cycles -= static_cast<T *>(this)->perform_bus_operation(BusOperation::Ready, busAddress, busValue);
}
while (!_ready_is_active && number_of_cycles > 0) {
if (_nextBusOperation != BusOperation::None) {
if (nextBusOperation != BusOperation::None) {
_irq_request_history[0] = _irq_request_history[1];
_irq_request_history[1] = _irq_line_is_enabled && !_interruptFlag;
number_of_cycles -= static_cast<T *>(this)->perform_bus_operation(_nextBusOperation, _busAddress, _busValue);
_nextBusOperation = BusOperation::None;
number_of_cycles -= static_cast<T *>(this)->perform_bus_operation(nextBusOperation, busAddress, busValue);
nextBusOperation = BusOperation::None;
}
const MicroOp cycle = program[scheduleProgramProgramCounter];
scheduleProgramProgramCounter++;
#define read_op(val, addr) _nextBusOperation = BusOperation::ReadOpcode; _busAddress = addr; _busValue = &val
#define read_mem(val, addr) _nextBusOperation = BusOperation::Read; _busAddress = addr; _busValue = &val
#define throwaway_read(addr) _nextBusOperation = BusOperation::Read; _busAddress = addr; _busValue = &throwaway_target
#define write_mem(val, addr) _nextBusOperation = BusOperation::Write; _busAddress = addr; _busValue = &val
#define read_op(val, addr) nextBusOperation = BusOperation::ReadOpcode; busAddress = addr; busValue = &val
#define read_mem(val, addr) nextBusOperation = BusOperation::Read; busAddress = addr; busValue = &val
#define throwaway_read(addr) nextBusOperation = BusOperation::Read; busAddress = addr; busValue = &throwaway_target
#define write_mem(val, addr) nextBusOperation = BusOperation::Write; busAddress = addr; busValue = &val
switch(cycle) {
@ -1040,7 +1043,7 @@ template <class T> class Processor {
break;
}
if (isReadOperation(_nextBusOperation) && _ready_line_is_enabled) {
if (isReadOperation(nextBusOperation) && _ready_line_is_enabled) {
_ready_is_active = true;
}
}
@ -1049,6 +1052,9 @@ template <class T> class Processor {
_scheduleProgramsReadPointer = scheduleProgramsReadPointer;
_scheduleProgramProgramCounter = scheduleProgramProgramCounter;
_nextAddress = nextAddress;
_nextBusOperation = nextBusOperation;
_busAddress = busAddress;
_busValue = busValue;
}
}