mirror of
https://github.com/TomHarte/CLK.git
synced 2024-11-09 01:10:10 +00:00
652 lines
16 KiB
Swift
652 lines
16 KiB
Swift
//
|
|
// Z80MemptrTests.swift
|
|
// Clock Signal
|
|
//
|
|
// Created by Thomas Harte on 21/07/2017.
|
|
// Copyright 2017 Thomas Harte. All rights reserved.
|
|
//
|
|
|
|
import XCTest
|
|
|
|
class Z80MemptrTester: XCTestCase {
|
|
|
|
let machine = CSTestMachineZ80()
|
|
|
|
private func test(program : [UInt8], initialValue : UInt16) -> UInt16 {
|
|
// Create a machine and install the supplied program at address 0, setting the PC to run from there
|
|
machine.setValue(0x0000, for: .programCounter)
|
|
machine.setData(Data(_: program), atAddress: 0x0000)
|
|
|
|
// Set the initial value of memptr, run for the requested number of cycles,
|
|
// return the new value
|
|
machine.setValue(initialValue, for: .memPtr)
|
|
machine.runForInstruction()
|
|
return machine.value(for: .memPtr)
|
|
}
|
|
|
|
private func testPage(_ prefix: UInt8, exclusions: [Int]) {
|
|
for opcode in 0 ..< 256 {
|
|
if exclusions.contains(opcode) {
|
|
continue
|
|
}
|
|
|
|
var program: [UInt8] = [
|
|
(prefix != 0) ? prefix : UInt8(opcode), UInt8(opcode), 0, 0
|
|
]
|
|
|
|
let argumentPosition = (prefix != 0) ? 2 : 1
|
|
for _ in 0 ..< 10 {
|
|
let random = arc4random_uniform(65536)
|
|
program[argumentPosition + 0] = UInt8(random & 0x00ff)
|
|
program[argumentPosition + 1] = UInt8(random >> 8)
|
|
|
|
let expectedResult = UInt16(arc4random_uniform(65536))
|
|
|
|
let result = test(program: program, initialValue: expectedResult)
|
|
XCTAssertEqual(result, expectedResult, "Failed for opcode \(String(opcode, radix:16))")
|
|
|
|
// One failure per opcode will do.
|
|
if result != expectedResult {
|
|
break
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
private func insert16(program: inout [UInt8], address: Int, offset: size_t) {
|
|
program[offset] = UInt8(address & 0x00ff)
|
|
program[offset + 1] = UInt8(address >> 8)
|
|
}
|
|
|
|
/// Tests that everything not listed in the documentation has no effect upon MEMPTR.
|
|
func testStandardPageOthers() {
|
|
testPage(0, exclusions: [
|
|
0x02, // LD (BC), A
|
|
0x09, // ADD HL, BC
|
|
0x0a, // LD A, (BC)
|
|
0x10, // DJNZ
|
|
0x12, // LD (DE), A
|
|
0x18, // JR
|
|
0x19, // ADD HL, DE
|
|
0x1a, // LD A, (DE)
|
|
0x20, // JR NZ
|
|
0x22, // LD (nn), HL
|
|
0x28, // JR Z
|
|
0x29, // ADD HL, HL
|
|
0x2a, // LD HL, (nn)
|
|
0x30, // JR NC
|
|
0x32, // LD (nn), A
|
|
0x38, // JR C
|
|
0x39, // ADD HL, SP
|
|
0x3a, // LD A, (nn)
|
|
|
|
0xcb, // CB page
|
|
0xdd, // DD page
|
|
0xed, // ED page
|
|
0xfd, // FD page
|
|
])
|
|
}
|
|
|
|
func testEDPageOthers() {
|
|
testPage(0xed, exclusions: [
|
|
0x40, // IN B, (C)
|
|
0x41, // OUT (C), B
|
|
0x42, // SBC HL, BC
|
|
0x43, // LD (nn), HL
|
|
0x45, // RETN (??)
|
|
0x48, // IN C, (C)
|
|
0x49, // OUT (C), C
|
|
0x4a, // ADC HL, BC
|
|
0x4b, // LD BC, (nn)
|
|
0x4d, // RETI
|
|
0x50, // IN D, (C)
|
|
0x51, // OUT (C), D
|
|
0x52, // SBC HL, DE
|
|
0x53, // LD (nn), DE
|
|
0x55, // RETN (??)
|
|
0x58, // IN E, (C)
|
|
0x59, // OUT (C), E
|
|
0x5a, // ADC HL, DE
|
|
0x5b, // LD DE, (nn)
|
|
0x5d, // RETN (??)
|
|
0x60, // IN H, (C)
|
|
0x61, // OUT (C), H
|
|
0x62, // SBC HL, HL
|
|
0x63, // LD (nn), HL
|
|
0x65, // RETN (??)
|
|
0x67, // RRD
|
|
0x68, // IN L, (C)
|
|
0x69, // OUT (C), L
|
|
0x6a, // ADC HL, HL
|
|
0x6b, // LD HL, (nn)
|
|
0x6d, // RETN (??)
|
|
0x6f, // RLD
|
|
0x70, // IN (C)
|
|
0x71, // OUT (C), 0
|
|
0x72, // SBC HL, SP
|
|
0x73, // LD (nn), SP
|
|
0x75, // RETN (??)
|
|
0x78, // IN A, (C)
|
|
0x79, // OUT (C), A
|
|
0x7a, // ADC HL, SP
|
|
0x7b, // LD SP, (nn)
|
|
0x7d, // RETN (??)
|
|
0xa1, // CPI
|
|
0xa2, // INI
|
|
0xa3, // OUTI
|
|
0xa9, // CPD
|
|
0xaa, // IND
|
|
0xab, // OUTD
|
|
0xb0, // LDIR
|
|
0xb1, // CPIR
|
|
0xb2, // INIR
|
|
0xb3, // OUIR
|
|
0xb8, // LDDR
|
|
0xb9, // CPDR
|
|
0xba, // INDR
|
|
0xbb, // OTDR
|
|
])
|
|
// testPage(0xcb, exclusions: [])
|
|
// testPage(0xdd, exclusions: [])
|
|
// testPage(0xfd, exclusions: [])
|
|
}
|
|
|
|
/*
|
|
Re: comments below:
|
|
All the CPU chips tested give the same results except KP1858BM1 and T34BM1 slices noted as "BM1".
|
|
*/
|
|
|
|
// LD A, (addr)
|
|
func testLDAnn() {
|
|
// MEMPTR = addr+1
|
|
var program: [UInt8] = [
|
|
0x3a, 0x00, 0x00
|
|
]
|
|
for addr in 0 ..< 65536 {
|
|
program[1] = UInt8(addr & 0x00ff)
|
|
program[2] = UInt8(addr >> 8)
|
|
let expectedResult = UInt16((addr + 1) & 0xffff)
|
|
|
|
let result = test(program: program, initialValue: 0xffff)
|
|
XCTAssertEqual(result, expectedResult)
|
|
}
|
|
}
|
|
|
|
// LD (bc/de),A, and LD (nn),A
|
|
func testLDrpA() {
|
|
// MEMPTR_low = (addr + 1) & #FF, MEMPTR_hi = A
|
|
// Note for *BM1: MEMPTR_low = (addr + 1) & #FF, MEMPTR_hi = 0
|
|
let bcProgram: [UInt8] = [
|
|
0x02
|
|
]
|
|
let deProgram: [UInt8] = [
|
|
0x12
|
|
]
|
|
var nnProgram: [UInt8] = [
|
|
0x32, 0x00, 0x00
|
|
]
|
|
|
|
for addr in 0 ..< 256 {
|
|
machine.setValue(UInt16(addr), for: .BC)
|
|
machine.setValue(UInt16(addr), for: .DE)
|
|
insert16(program: &nnProgram, address: addr, offset: 1)
|
|
|
|
for a in 0 ..< 256 {
|
|
machine.setValue(UInt16(a), for: .A)
|
|
|
|
let expectedResult = UInt16(((addr + 1) & 0xff) + (a << 8))
|
|
|
|
let bcResult = test(program: bcProgram, initialValue: 0xffff)
|
|
let deResult = test(program: deProgram, initialValue: 0xffff)
|
|
let nnResult = test(program: nnProgram, initialValue: 0xffff)
|
|
|
|
XCTAssertEqual(bcResult, expectedResult)
|
|
XCTAssertEqual(deResult, expectedResult)
|
|
XCTAssertEqual(nnResult, expectedResult)
|
|
}
|
|
}
|
|
}
|
|
|
|
// LD A, (rp)
|
|
func testLDArp() {
|
|
// MEMPTR = rp+1
|
|
let bcProgram: [UInt8] = [
|
|
0x0a
|
|
]
|
|
let deProgram: [UInt8] = [
|
|
0x1a
|
|
]
|
|
for addr in 0 ..< 65536 {
|
|
machine.setValue(UInt16(addr), for: .BC)
|
|
machine.setValue(UInt16(addr), for: .DE)
|
|
|
|
let expectedResult = UInt16((addr + 1) & 0xffff)
|
|
|
|
let bcResult = test(program: bcProgram, initialValue: 0xffff)
|
|
let deResult = test(program: deProgram, initialValue: 0xffff)
|
|
|
|
XCTAssertEqual(bcResult, expectedResult)
|
|
XCTAssertEqual(deResult, expectedResult)
|
|
}
|
|
}
|
|
|
|
// LD (addr), rp
|
|
func testLDnnrp() {
|
|
// MEMPTR = addr + 1
|
|
var ldnnhlBaseProgram: [UInt8] = [
|
|
0x22, 0x00, 0x00
|
|
]
|
|
var ldnnbcEDProgram: [UInt8] = [
|
|
0xed, 0x43, 0x00, 0x00
|
|
]
|
|
var ldnndeEDProgram: [UInt8] = [
|
|
0xed, 0x53, 0x00, 0x00
|
|
]
|
|
var ldnnhlEDProgram: [UInt8] = [
|
|
0xed, 0x63, 0x00, 0x00
|
|
]
|
|
var ldnnspEDProgram: [UInt8] = [
|
|
0xed, 0x73, 0x00, 0x00
|
|
]
|
|
|
|
for addr in 0 ..< 65536 {
|
|
insert16(program: &ldnnhlBaseProgram, address: addr, offset: 1)
|
|
insert16(program: &ldnnbcEDProgram, address: addr, offset: 2)
|
|
insert16(program: &ldnndeEDProgram, address: addr, offset: 2)
|
|
insert16(program: &ldnnhlEDProgram, address: addr, offset: 2)
|
|
insert16(program: &ldnnspEDProgram, address: addr, offset: 2)
|
|
|
|
let expectedResult = UInt16((addr + 1) & 0xffff)
|
|
|
|
XCTAssertEqual(test(program: ldnnhlBaseProgram, initialValue: expectedResult ^ 1), expectedResult)
|
|
XCTAssertEqual(test(program: ldnnbcEDProgram, initialValue: expectedResult ^ 1), expectedResult)
|
|
XCTAssertEqual(test(program: ldnndeEDProgram, initialValue: expectedResult ^ 1), expectedResult)
|
|
XCTAssertEqual(test(program: ldnnhlEDProgram, initialValue: expectedResult ^ 1), expectedResult)
|
|
XCTAssertEqual(test(program: ldnnspEDProgram, initialValue: expectedResult ^ 1), expectedResult)
|
|
}
|
|
}
|
|
|
|
// LD rp, (addr)
|
|
func testLDrpnn() {
|
|
// MEMPTR = addr+1
|
|
var hlBaseProgram: [UInt8] = [
|
|
0x22, 0x00, 0x00
|
|
]
|
|
|
|
var bcEDProgram: [UInt8] = [
|
|
0xed, 0x43, 0x00, 0x00
|
|
]
|
|
var deEDProgram: [UInt8] = [
|
|
0xed, 0x53, 0x00, 0x00
|
|
]
|
|
var hlEDProgram: [UInt8] = [
|
|
0xed, 0x63, 0x00, 0x00
|
|
]
|
|
var spEDProgram: [UInt8] = [
|
|
0xed, 0x73, 0x00, 0x00
|
|
]
|
|
|
|
var ixProgram: [UInt8] = [
|
|
0xdd, 0x22, 0x00, 0x00
|
|
]
|
|
var iyProgram: [UInt8] = [
|
|
0xfd, 0x22, 0x00, 0x00
|
|
]
|
|
|
|
for addr in 0 ..< 65536 {
|
|
hlBaseProgram[1] = UInt8(addr & 0x00ff)
|
|
hlBaseProgram[2] = UInt8(addr >> 8)
|
|
|
|
bcEDProgram[2] = UInt8(addr & 0x00ff)
|
|
bcEDProgram[3] = UInt8(addr >> 8)
|
|
deEDProgram[2] = UInt8(addr & 0x00ff)
|
|
deEDProgram[3] = UInt8(addr >> 8)
|
|
hlEDProgram[2] = UInt8(addr & 0x00ff)
|
|
hlEDProgram[3] = UInt8(addr >> 8)
|
|
spEDProgram[2] = UInt8(addr & 0x00ff)
|
|
spEDProgram[3] = UInt8(addr >> 8)
|
|
|
|
ixProgram[2] = UInt8(addr & 0x00ff)
|
|
ixProgram[3] = UInt8(addr >> 8)
|
|
iyProgram[2] = UInt8(addr & 0x00ff)
|
|
iyProgram[3] = UInt8(addr >> 8)
|
|
|
|
let expectedResult = UInt16((addr + 1) & 0xffff)
|
|
|
|
XCTAssertEqual(test(program: hlBaseProgram, initialValue: 0xffff), expectedResult)
|
|
|
|
XCTAssertEqual(test(program: bcEDProgram, initialValue: 0xffff), expectedResult)
|
|
XCTAssertEqual(test(program: deEDProgram, initialValue: 0xffff), expectedResult)
|
|
XCTAssertEqual(test(program: hlEDProgram, initialValue: 0xffff), expectedResult)
|
|
XCTAssertEqual(test(program: spEDProgram, initialValue: 0xffff), expectedResult)
|
|
|
|
XCTAssertEqual(test(program: ixProgram, initialValue: 0xffff), expectedResult)
|
|
XCTAssertEqual(test(program: iyProgram, initialValue: 0xffff), expectedResult)
|
|
}
|
|
}
|
|
|
|
// EX (SP), rp
|
|
func testEXSPrp() {
|
|
// MEMPTR = rp at end
|
|
var hlProgram: [UInt8] = [
|
|
0xe3, 0x00, 0x00, 0x00
|
|
]
|
|
var ixProgram: [UInt8] = [
|
|
0xdd, 0xe3, 0x00, 0x00
|
|
]
|
|
var iyProgram: [UInt8] = [
|
|
0xfd, 0xe3, 0x00, 0x00
|
|
]
|
|
|
|
machine.setValue(2, for: .stackPointer)
|
|
|
|
for addr in 0 ..< 65536 {
|
|
hlProgram[2] = UInt8(addr & 0x00ff)
|
|
hlProgram[3] = UInt8(addr >> 8)
|
|
ixProgram[2] = UInt8(addr & 0x00ff)
|
|
ixProgram[3] = UInt8(addr >> 8)
|
|
iyProgram[2] = UInt8(addr & 0x00ff)
|
|
iyProgram[3] = UInt8(addr >> 8)
|
|
|
|
XCTAssertEqual(test(program: hlProgram, initialValue: 0xffff), UInt16(addr))
|
|
XCTAssertEqual(test(program: ixProgram, initialValue: 0xffff), UInt16(addr))
|
|
XCTAssertEqual(test(program: iyProgram, initialValue: 0xffff), UInt16(addr))
|
|
}
|
|
}
|
|
|
|
// ADD/ADC/SBC dest, src
|
|
func testADDADCSBCrr() {
|
|
// MEMPTR = dest prior to modification + 1
|
|
let addProgram: [UInt8] = [
|
|
0x09
|
|
]
|
|
let adcProgram: [UInt8] = [
|
|
0xed, 0x4a
|
|
]
|
|
let sbcProgram: [UInt8] = [
|
|
0xed, 0x42
|
|
]
|
|
|
|
for addr in 0 ..< 65536 {
|
|
let expectedResult = UInt16((addr + 1) & 0xffff)
|
|
machine.setValue(UInt16(addr), for: .HL)
|
|
|
|
XCTAssertEqual(test(program: addProgram, initialValue: 0xffff), expectedResult)
|
|
XCTAssertEqual(test(program: adcProgram, initialValue: 0xffff), expectedResult)
|
|
XCTAssertEqual(test(program: sbcProgram, initialValue: 0xffff), expectedResult)
|
|
}
|
|
}
|
|
|
|
// RLD/RRD
|
|
func testRLDRRD() {
|
|
// MEMPTR = HL + 1
|
|
let rldProgram: [UInt8] = [
|
|
0xed, 0x6f
|
|
]
|
|
let rrdProgram: [UInt8] = [
|
|
0xed, 0x67
|
|
]
|
|
|
|
for addr in 0 ..< 65536 {
|
|
let expectedResult = UInt16((addr + 1) & 0xffff)
|
|
machine.setValue(UInt16(addr), for: .HL)
|
|
|
|
XCTAssertEqual(test(program: rldProgram, initialValue: 0xffff), expectedResult)
|
|
XCTAssertEqual(test(program: rrdProgram, initialValue: 0xffff), expectedResult)
|
|
}
|
|
}
|
|
|
|
/* TODO:
|
|
JR/DJNZ/RET/RETI/RST (jumping to addr)
|
|
MEMPTR = addr
|
|
|
|
(implemented in principle)
|
|
*/
|
|
func testJR() {
|
|
var jrProgram: [UInt8] = [
|
|
0x18, 0x00
|
|
]
|
|
|
|
for offset in 0 ..< 256 {
|
|
jrProgram[1] = UInt8(offset)
|
|
let result = test(program: jrProgram, initialValue: 0xffff)
|
|
XCTAssertEqual(result, machine.value(for: .programCounter))
|
|
}
|
|
}
|
|
|
|
func testJRcc() {
|
|
func testJR(instruction: UInt8, shouldPass: Bool) {
|
|
var program: [UInt8] = [
|
|
instruction, 0x00
|
|
]
|
|
|
|
for offset in 0 ..< 256 {
|
|
program[1] = UInt8(offset)
|
|
let result = test(program: program, initialValue: 0xffff)
|
|
XCTAssertEqual(result, shouldPass ? machine.value(for: .programCounter) : 0xffff)
|
|
}
|
|
}
|
|
|
|
// JR NZ.
|
|
machine.setValue(0x00, for: .AF)
|
|
testJR(instruction: 0x20, shouldPass: true)
|
|
|
|
machine.setValue(0xff, for: .AF)
|
|
testJR(instruction: 0x20, shouldPass: false)
|
|
|
|
// JR NC
|
|
machine.setValue(0x00, for: .AF)
|
|
testJR(instruction: 0x30, shouldPass: true)
|
|
|
|
machine.setValue(0xff, for: .AF)
|
|
testJR(instruction: 0x30, shouldPass: false)
|
|
|
|
// JR Z
|
|
machine.setValue(0x00, for: .AF)
|
|
testJR(instruction: 0x28, shouldPass: false)
|
|
|
|
machine.setValue(0xff, for: .AF)
|
|
testJR(instruction: 0x28, shouldPass: true)
|
|
|
|
// JR C
|
|
machine.setValue(0x00, for: .AF)
|
|
testJR(instruction: 0x38, shouldPass: false)
|
|
|
|
machine.setValue(0xff, for: .AF)
|
|
testJR(instruction: 0x38, shouldPass: true)
|
|
}
|
|
|
|
func testRST() {
|
|
var rstProgram: [UInt8] = [
|
|
0x00
|
|
]
|
|
|
|
for offset in 0 ..< 8 {
|
|
rstProgram[0] = UInt8(offset << 3) + 0xc7
|
|
let result = test(program: rstProgram, initialValue: 0xffff)
|
|
XCTAssertEqual(result, machine.value(for: .programCounter))
|
|
}
|
|
}
|
|
|
|
func testRET() {
|
|
let retProgram: [UInt8] = [
|
|
0xc9
|
|
]
|
|
|
|
for addr in 0 ..< 65536 {
|
|
let stackContents: [UInt8] = [
|
|
UInt8(addr & 0xff), UInt8(addr >> 8)
|
|
]
|
|
|
|
machine.setData(Data(stackContents), atAddress: 0xf001)
|
|
machine.setValue(0xf000, for: .stackPointer)
|
|
let result = test(program: retProgram, initialValue: 0xffff)
|
|
XCTAssertEqual(result, machine.value(for: .programCounter))
|
|
}
|
|
}
|
|
func testRETI() {
|
|
let retiProgram: [UInt8] = [
|
|
0xed, 0x4d
|
|
]
|
|
|
|
for addr in 0 ..< 65536 {
|
|
let stackContents: [UInt8] = [
|
|
UInt8(addr & 0xff), UInt8(addr >> 8)
|
|
]
|
|
|
|
machine.setData(Data(stackContents), atAddress: 0xf001)
|
|
machine.setValue(0xf000, for: .stackPointer)
|
|
let result = test(program: retiProgram, initialValue: 0xffff)
|
|
XCTAssertEqual(result, machine.value(for: .programCounter))
|
|
}
|
|
}
|
|
|
|
/* TODO:
|
|
JP(except JP rp)/CALL addr (even in case of conditional call/jp, independently on condition satisfied or not)
|
|
MEMPTR = addr
|
|
*/
|
|
func testCALL() {
|
|
var callProgram: [UInt8] = [
|
|
0xcd, 0x00, 0x00
|
|
]
|
|
|
|
for offset in 0 ..< 65536 {
|
|
callProgram[1] = UInt8(offset & 0xff)
|
|
callProgram[2] = UInt8(offset >> 8)
|
|
let result = test(program: callProgram, initialValue: 0xffff)
|
|
XCTAssertEqual(result, machine.value(for: .programCounter))
|
|
}
|
|
}
|
|
|
|
/* TODO:
|
|
IN A,(port)
|
|
MEMPTR = (A_before_operation << 8) + port + 1
|
|
|
|
(implemented, not tested)
|
|
*/
|
|
|
|
/* TODO:
|
|
IN A,(C)
|
|
MEMPTR = BC + 1
|
|
|
|
(implemented, not tested)
|
|
*/
|
|
|
|
/* TODO:
|
|
OUT (port),A
|
|
MEMPTR_low = (port + 1) & #FF, MEMPTR_hi = A
|
|
Note for *BM1: MEMPTR_low = (port + 1) & #FF, MEMPTR_hi = 0
|
|
*/
|
|
|
|
/* TODO:
|
|
OUT (C),A
|
|
MEMPTR = BC + 1
|
|
*/
|
|
|
|
/* TODO:
|
|
LDIR/LDDR
|
|
when BC == 1: MEMPTR is not changed
|
|
when BC <> 1: MEMPTR = PC + 1, where PC = instruction address
|
|
*/
|
|
|
|
// CPI
|
|
func testCPI() {
|
|
// MEMPTR = MEMPTR + 1
|
|
let program: [UInt8] = [
|
|
0xed, 0xa1
|
|
]
|
|
machine.setData(Data(_: program), atAddress: 0x0000)
|
|
machine.setValue(0, for: .memPtr)
|
|
|
|
for c in 1 ..< 65536 {
|
|
machine.setValue(0x0000, for: .programCounter)
|
|
machine.runForNumber(ofCycles: 16)
|
|
XCTAssertEqual(UInt16(c), machine.value(for: .memPtr))
|
|
}
|
|
}
|
|
|
|
// CPD
|
|
func testCPD() {
|
|
// MEMPTR = MEMPTR - 1
|
|
let program: [UInt8] = [
|
|
0xed, 0xa9
|
|
]
|
|
machine.setData(Data(_: program), atAddress: 0x0000)
|
|
machine.setValue(0, for: .memPtr)
|
|
|
|
for c in 1 ..< 65536 {
|
|
machine.setValue(0x0000, for: .programCounter)
|
|
machine.runForNumber(ofCycles: 16)
|
|
XCTAssertEqual(UInt16(65536 - c), machine.value(for: .memPtr))
|
|
}
|
|
}
|
|
|
|
/* TODO:
|
|
CPIR
|
|
when BC=1 or A=(HL): exactly as CPI
|
|
In other cases MEMPTR = PC + 1 on each step, where PC = instruction address.
|
|
Note* since at the last execution BC=1 or A=(HL), resulting MEMPTR = PC + 1 + 1
|
|
(if there were not interrupts during the execution)
|
|
*/
|
|
|
|
/* TODO:
|
|
CPDR
|
|
when BC=1 or A=(HL): exactly as CPD
|
|
In other cases MEMPTR = PC + 1 on each step, where PC = instruction address.
|
|
Note* since at the last execution BC=1 or A=(HL), resulting MEMPTR = PC + 1 - 1
|
|
(if there were not interrupts during the execution)
|
|
*/
|
|
|
|
/* TODO:
|
|
INI
|
|
MEMPTR = BC_before_decrementing_B + 1
|
|
*/
|
|
|
|
/* TODO:
|
|
IND
|
|
MEMPTR = BC_before_decrementing_B - 1
|
|
*/
|
|
|
|
/* TODO:
|
|
INIR
|
|
exactly as INI on each execution.
|
|
I.e. resulting MEMPTR = ((1 << 8) + C) + 1
|
|
*/
|
|
|
|
/* TODO:
|
|
INDR
|
|
exactly as IND on each execution.
|
|
I.e. resulting MEMPTR = ((1 << 8) + C) - 1
|
|
*/
|
|
|
|
/* TODO:
|
|
OUTI
|
|
MEMPTR = BC_after_decrementing_B + 1
|
|
*/
|
|
|
|
/* TODO:
|
|
OUTD
|
|
MEMPTR = BC_after_decrementing_B - 1
|
|
*/
|
|
|
|
/* TODO:
|
|
OTIR
|
|
exactly as OUTI on each execution. I.e. resulting MEMPTR = C + 1
|
|
*/
|
|
|
|
/* TODO:
|
|
OTDR
|
|
exactly as OUTD on each execution. I.e. resulting MEMPTR = C - 1
|
|
*/
|
|
|
|
/* TODO:
|
|
Any instruction with (INDEX+d):
|
|
MEMPTR = INDEX+d
|
|
*/
|
|
|
|
/* TODO:
|
|
Interrupt call to addr:
|
|
As usual CALL. I.e. MEMPTR = addr
|
|
*/
|
|
}
|