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Corrects absolute, x and absolute, y addressing modes.

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This commit is contained in:
Thomas Harte 2020-10-13 20:30:39 -04:00
parent 8f5537aaaa
commit 3e6a2adaaf
2 changed files with 4 additions and 3 deletions
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3
OSBindings/Mac/Clock SignalTests/Jeek816Tests.swift
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@ -28,7 +28,8 @@ class Jeek816Tests: XCTestCase {
NSException(name: NSExceptionName(rawValue: "Failed Test"), reason: "Couldn't load file \(name)", userInfo: nil).raise()
}
while machine.value(for: .lastOperationAddress) != 0x0874 {
// $874 is the failure stopping point and $85d is success.
while machine.value(for: .lastOperationAddress) != 0x0874 && machine.value(for: .lastOperationAddress) != 0x085d {
machine.runForNumber(ofCycles: 1000)
}

4
Processors/65816/Implementation/65816Implementation.hpp
View File

@ -249,7 +249,7 @@ template <typename BusHandler> void Processor<BusHandler>::run_for(const Cycles
case OperationConstructAbsoluteXRead:
case OperationConstructAbsoluteX:
data_address_ = ((instruction_buffer_.value + x()) & 0xffff) + data_bank_;
data_address_ = instruction_buffer_.value + x() + data_bank_;
incorrect_data_address_ = (data_address_ & 0xff) | (instruction_buffer_.value & 0xff00) + data_bank_;
// If the incorrect address isn't actually incorrect, skip its usage.
@ -261,7 +261,7 @@ template <typename BusHandler> void Processor<BusHandler>::run_for(const Cycles
case OperationConstructAbsoluteYRead:
case OperationConstructAbsoluteY:
data_address_ = ((instruction_buffer_.value + y()) & 0xffff) + data_bank_;
data_address_ = instruction_buffer_.value + y() + data_bank_;
incorrect_data_address_ = (data_address_ & 0xff) + (instruction_buffer_.value & 0xff00) + data_bank_;
// If the incorrect address isn't actually incorrect, skip its usage.