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Adds tests for (d, x) and (d), y. Both amply tested in emulation mode, so no problems.

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Five to go, all potentially troublesome.
This commit is contained in:
Thomas Harte 2020-10-14 21:38:00 -04:00
parent 27afb8f0a7
commit c35969d677
1 changed files with 80 additions and 6 deletions
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86
OSBindings/Mac/Clock SignalTests/65816AddressingTests.swift
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@ -309,9 +309,7 @@ class WDC65816AddressingTests: XCTestCase {
XCTAssertEqual(machine.value(for: .A), 0xcdab)
}
// TODO: all tests from this point downward.
func testIndirectDirextX8() {
func testDirectXIndirectX8() {
// "If the D register is $FF00, the X register is $000A, and the e flag is 1 (note
// that this means the m flag must be 1), then for LDA ($FE,X), the address of the
// low byte of the pointer is $00FF08 and the address of the high byte is $00FF09.
@ -319,9 +317,27 @@ class WDC65816AddressingTests: XCTestCase {
// * $00FF08 contains $FF
// * $00FF09 contains $FF
// then LDA ($FE,X) loads the low byte of the data from address $12FFFF."
let machine = machine8()
machine.setValue(0xff00, for: .direct)
machine.setValue(0x000a, for: .X)
machine.setValue(0x12, for: .dataBank)
machine.setValue(0xff, forAddress: 0xff08)
machine.setValue(0xff, forAddress: 0xff09)
machine.setValue(0xab, forAddress: 0x12ffff)
// LDA ($fe, x); NOP
machine.setData(Data([0xa1, 0xfe, 0xea]), atAddress: 0x0200)
machine.setValue(0x200, for: .programCounter)
machine.runForNumber(ofCycles: 7)
XCTAssertEqual(machine.value(for: .A), 0xab)
}
func testIndirectDirextX16() {
func testDirectXIndirect16() {
// "If the D register is $FF00, the X register is $000A, and the m flag is 0
// (note that this means the e flag must be 0), then for LDA ($FE,X), the address
// of the low byte of the pointer is $000008 and the address of the high byte
@ -330,9 +346,28 @@ class WDC65816AddressingTests: XCTestCase {
// * $000009 contains $FF
// then LDA ($FE,X) loads the low byte of the data from address $12FFFF, and the
// high byte from $130000."
let machine = machine16()
machine.setValue(0xff00, for: .direct)
machine.setValue(0x000a, for: .X)
machine.setValue(0x12, for: .dataBank)
machine.setValue(0xff, forAddress: 0x0008)
machine.setValue(0xff, forAddress: 0x0009)
machine.setValue(0xab, forAddress: 0x12ffff)
machine.setValue(0xcd, forAddress: 0x130000)
// LDA ($fe, x); NOP
machine.setData(Data([0xa1, 0xfe, 0xea]), atAddress: 0x0200)
machine.setValue(0x200, for: .programCounter)
machine.runForNumber(ofCycles: 8)
XCTAssertEqual(machine.value(for: .A), 0xcdab)
}
func testIndirectDirectY8() {
func testIndirectY8() {
// "If the D register is $FF00 and the e flag is 1 (note that this means the
// m flag must be 1), then for LDA ($FF),Y, the address of the low byte of the
// pointer is $00FFFF and the address of the high byte is $00FF00.
@ -343,9 +378,27 @@ class WDC65816AddressingTests: XCTestCase {
//
// "this is one of the rare instances where emulation mode has
// different behavior than the 65C02 or NMOS 6502..."
let machine = machine8()
machine.setValue(0xff00, for: .direct)
machine.setValue(0x000a, for: .Y)
machine.setValue(0x12, for: .dataBank)
machine.setValue(0xff, forAddress: 0xff00)
machine.setValue(0xfe, forAddress: 0xffff)
machine.setValue(0xab, forAddress: 0x130008)
// LDA ($ff), y; NOP
machine.setData(Data([0xb1, 0xff, 0xea]), atAddress: 0x0200)
machine.setValue(0x200, for: .programCounter)
machine.runForNumber(ofCycles: 7)
XCTAssertEqual(machine.value(for: .A), 0xab)
}
func testIndirectDirectY16() {
func testIndirectY16() {
// "If the D register is $FF00 and the m flag is 0 (note that this means the
// e flag must be 0), then for LDA ($FF),Y, the address of the low byte of the
// pointer is $00FFFF and the address of the high byte is $000000.
@ -354,8 +407,29 @@ class WDC65816AddressingTests: XCTestCase {
// * $00FFFF contains $FE
// then LDA ($FF),Y loads the low byte of the data from address $130008, and the
// high byte from $130009."
let machine = machine16()
machine.setValue(0xff00, for: .direct)
machine.setValue(0x000a, for: .Y)
machine.setValue(0x12, for: .dataBank)
machine.setValue(0xff, forAddress: 0x0000)
machine.setValue(0xfe, forAddress: 0xffff)
machine.setValue(0xab, forAddress: 0x130008)
machine.setValue(0xcd, forAddress: 0x130009)
// LDA ($ff), y; NOP
machine.setData(Data([0xb1, 0xff, 0xea]), atAddress: 0x0200)
machine.setValue(0x200, for: .programCounter)
machine.runForNumber(ofCycles: 8)
XCTAssertEqual(machine.value(for: .A), 0xcdab)
}
// TODO: all tests from this point downward.
func testIndirectDirectYLong() {
// "If the D register is $FF00 and the m flag is 0, then for LDA [$FE],Y, the address
// of the low byte of the pointer is $00FFFE, the address of the middle byte is $00FFFF,