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main.swift: fix clock delay

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This commit is contained in:
Andrew Glaze 2024-08-18 16:33:25 -04:00
parent 5f770589c8
commit 9c5cb22223
2 changed files with 12 additions and 8 deletions
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10
Sources/CPU.swift
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@ -124,14 +124,16 @@ class CPU {
func run(onCycle: @escaping () -> (), onComplete: @escaping () -> ()) { func run(onCycle: @escaping () -> (), onComplete: @escaping () -> ()) {
let opcodes = OPCODES_MAP let opcodes = OPCODES_MAP
_ = Timer.scheduledTimer(withTimeInterval: 0.00007, repeats: true) { [self] timer in //_ = Timer.scheduledTimer(withTimeInterval: 0.00007, repeats: true) { [self] timer in
processOpcodes(onCycle: onCycle, opcodes: opcodes, timer: timer) { while true {
processOpcodes(onCycle: onCycle, opcodes: opcodes) {
onComplete() onComplete()
} }
} }
//}
} }
func processOpcodes(onCycle: () -> (), opcodes: [UInt8: OpCode], timer: Timer, onComplete: () -> ()) { func processOpcodes(onCycle: () -> (), opcodes: [UInt8: OpCode], onComplete: () -> ()) {
onCycle() onCycle()
let code = memRead(programCounter) let code = memRead(programCounter)
programCounter += 1 programCounter += 1
@ -295,7 +297,7 @@ class CPU {
inx() inx()
/// BRK /// BRK
case 0x00: case 0x00:
timer.invalidate() //timer.invalidate()
onComplete() onComplete()
/// NOP Read /// NOP Read
case 0x04, 0x44, 0x64, 0x14, 0x34, 0x54, 0x74, 0xd4, 0xf4, 0x0c, 0x1c, 0x3c, 0x5c, 0x7c, 0xdc, 0xfc: case 0x04, 0x44, 0x64, 0x14, 0x34, 0x54, 0x74, 0xd4, 0xf4, 0x0c, 0x1c, 0x3c, 0x5c, 0x7c, 0xdc, 0xfc:

10
Sources/main.swift
View File

@ -94,7 +94,7 @@ func readScreenState(_ cpu: CPU, frame: inout [UInt8]) -> Bool {
return update return update
} }
guard let rom = NSData(contentsOfFile: "nestest.nes") else { fatalError("Rom not found") } guard let rom = NSData(contentsOfFile: "snake.nes") else { fatalError("Rom not found") }
var gameCode = [UInt8](repeating: 0, count: rom.length) var gameCode = [UInt8](repeating: 0, count: rom.length)
rom.getBytes(&gameCode, length: rom.length) rom.getBytes(&gameCode, length: rom.length)
@ -103,20 +103,22 @@ let bus = Bus(try! Rom(gameCode))
var cpu = CPU(bus: bus) var cpu = CPU(bus: bus)
//cpu.load(gameCode) //cpu.load(gameCode)
cpu.reset() cpu.reset()
cpu.programCounter = 0xC000 //cpu.programCounter = 0xC000
var screenState = [UInt8](repeating: 0, count: 32 * 3 * 32) var screenState = [UInt8](repeating: 0, count: 32 * 3 * 32)
var rng = SystemRandomNumberGenerator() var rng = SystemRandomNumberGenerator()
cpu.run(onCycle: { cpu.run(onCycle: {
print(dumpCpuState(cpu)) //print(dumpCpuState(cpu))
handleUserInput(cpu, event: &event) handleUserInput(cpu, event: &event)
//cpu.memWrite(0xfe, data: UInt8.random(in: 1...16, using: &rng)) cpu.memWrite(0xfe, data: UInt8.random(in: 1...16, using: &rng))
if readScreenState(cpu, frame: &screenState) { if readScreenState(cpu, frame: &screenState) {
SDL_UpdateTexture(texture, nil, screenState, 32 * 3) SDL_UpdateTexture(texture, nil, screenState, 32 * 3)
SDL_RenderCopy(canvas, texture, nil, nil) SDL_RenderCopy(canvas, texture, nil, nil)
SDL_RenderPresent(canvas) SDL_RenderPresent(canvas)
} }
usleep(70)
}, onComplete: { }, onComplete: {
SDL_DestroyWindow(window) SDL_DestroyWindow(window)
SDL_Quit() SDL_Quit()