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Add randomised initial state, fix PC.

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This commit is contained in:
Thomas Harte 2022-06-18 19:21:56 -04:00
parent f8e6954739
commit eb82e06fab
1 changed files with 23 additions and 2 deletions
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25
OSBindings/Mac/Clock SignalTests/65816ComparativeTests.mm
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@ -69,7 +69,7 @@ struct BusHandler: public CPU::MOS6502Esque::BusHandler<uint32_t> {
using Register = CPU::MOS6502Esque::Register;
const uint32_t pc =
processor.get_value_of_register(Register::ProgramCounter) |
(processor.get_value_of_register(Register::ProgramBank) << 8);
(processor.get_value_of_register(Register::ProgramBank) << 16);
inventions[pc] = ram[pc] = opcode;
}
@ -99,6 +99,10 @@ struct BusHandler: public CPU::MOS6502Esque::BusHandler<uint32_t> {
// Never run the official reset procedure.
processor.set_power_on(false);
// Make tests repeatable, at least for any given instance of
// the runtime.
srand(65816);
for(int operation = 0; operation < 512; operation++) {
const bool is_emulated = operation & 256;
const uint8_t opcode = operation & 255;
@ -106,18 +110,35 @@ struct BusHandler: public CPU::MOS6502Esque::BusHandler<uint32_t> {
// Ensure processor's next action is an opcode fetch.
processor.restart_operation_fetch();
// Randomise processor state.
// Randomise most of the processor state...
using Register = CPU::MOS6502Esque::Register;
processor.set_value_of_register(Register::A, rand() >> 8);
processor.set_value_of_register(Register::Flags, rand() >> 8);
processor.set_value_of_register(Register::X, rand() >> 8);
processor.set_value_of_register(Register::Y, rand() >> 8);
processor.set_value_of_register(Register::ProgramCounter, rand() >> 8);
processor.set_value_of_register(Register::StackPointer, rand() >> 8);
processor.set_value_of_register(Register::DataBank, rand() >> 8);
processor.set_value_of_register(Register::ProgramBank, rand() >> 8);
processor.set_value_of_register(Register::Direct, rand() >> 8);
// ... except for emulation mode, which is a given.
// And is set last to ensure proper internal state is applied.
processor.set_value_of_register(Register::EmulationFlag, is_emulated);
// Establish the opcode.
handler.setup(processor, opcode);
// TODO: dump current state.
// Run to the second opcode fetch.
handler.opcodes_remaining = 2;
try {
processor.run_for(Cycles(100));
} catch (const StopException &) {}
// TODO: dump initial and final memory contents, and final state.
printf("");
}
}