func TestVerticalMirroring(t *testing.T) {
ppu := rp2cgo2.NewRP2C02(nil, "NTSC")
ppu.Nametable.SetTables(0, 1, 0, 1)
// Mirror nametable #2 to #0
for i := uint16(0x2800); i <= 0x2bff; i++ {
ppu.Memory.Store(i-0x0800, 0xff)
if ppu.Memory.Fetch(i) != 0xff {
t.Error("Memory is not 0xff")
}
ppu.Memory.Store(i-0x0800, 0x00)
if ppu.Memory.Fetch(i) != 0x00 {
t.Error("Memory is not 0x00")
}
ppu.Memory.Store(i, 0xff)
if ppu.Memory.Fetch(i-0x0800) != 0xff {
t.Error("Memory is not 0xff")
}
ppu.Memory.Store(i, 0x00)
if ppu.Memory.Fetch(i) != 0x00 {
t.Error("Memory is not 0x00")
}
}
// Mirror nametable #3 to #1
for i := uint16(0x2c00); i <= 0x2fff; i++ {
ppu.Memory.Store(i-0x0800, 0xff)
if ppu.Memory.Fetch(i) != 0xff {
t.Error("Memory is not 0xff")
}
ppu.Memory.Store(i-0x0800, 0x00)
if ppu.Memory.Fetch(i) != 0x00 {
t.Error("Memory is not 0x00")
}
ppu.Memory.Store(i, 0xff)
if ppu.Memory.Fetch(i-0x0800) != 0xff {
t.Error("Memory is not 0xff")
}
ppu.Memory.Store(i, 0x00)
if ppu.Memory.Fetch(i) != 0x00 {
t.Error("Memory is not 0x00")
}
}
// Mirror nametable #2 to #0
for i := uint16(0x3000); i <= 0x33ff; i++ {
ppu.Memory.Store(i-0x1000, 0xff)
if ppu.Memory.Fetch(i) != 0xff {
t.Error("Memory is not 0xff")
}
ppu.Memory.Store(i-0x1000, 0x00)
if ppu.Memory.Fetch(i) != 0x00 {
t.Error("Memory is not 0x00")
}
ppu.Memory.Store(i, 0xff)
if ppu.Memory.Fetch(i-0x1000) != 0xff {
t.Error("Memory is not 0xff")
}
ppu.Memory.Store(i, 0x00)
if ppu.Memory.Fetch(i) != 0x00 {
t.Error("Memory is not 0x00")
}
}
// Mirror nametable #3 to #1
for i := uint16(0x3400); i <= 0x37ff; i++ {
ppu.Memory.Store(i-0x1000, 0xff)
if ppu.Memory.Fetch(i) != 0xff {
t.Error("Memory is not 0xff")
}
ppu.Memory.Store(i-0x1000, 0x00)
if ppu.Memory.Fetch(i) != 0x00 {
t.Error("Memory is not 0x00")
}
ppu.Memory.Store(i, 0xff)
if ppu.Memory.Fetch(i-0x1000) != 0xff {
t.Error("Memory is not 0xff")
}
ppu.Memory.Store(i, 0x00)
if ppu.Memory.Fetch(i) != 0x00 {
t.Error("Memory is not 0x00")
}
}
}
func NewNESFromReader(gamename string, reader io.Reader, options *Options) (nes *NES, err error) {
var audio Audio
var video Video
var recorder Recorder
var audioRecorder AudioRecorder
var cpuDivisor float32
var master bool
var bridge *Bridge
var rom ROM
region := RegionFromString(options.Region)
switch region {
case NTSC, PAL:
default:
err = fmt.Errorf("Invalid region %v, must be NTSC or PAL", options.Region)
return
}
audioFrequency := 44100
audioSampleSize := 2048
cpu := rp2ago3.NewRP2A03(audioFrequency)
if options.CPUDecode {
cpu.EnableDecode()
}
ppu := rp2cgo2.NewRP2C02(cpu.InterruptLine(m65go2.Nmi), region.String())
if len(options.Connect) > 0 {
master = false
bridge = newBridge(nil, options.Connect)
} else {
master = true
bridge = newBridge(nil, options.Listen)
buf, err := ioutil.ReadAll(reader)
if err != nil {
err = errors.New(fmt.Sprintf("Error loading ROM: %v", err))
return nil, err
}
rom, err = NewROMFromBuf(buf, gamename, ".nes", cpu.InterruptLine(m65go2.Irq), ppu.Nametable.SetTables)
if err != nil {
err = errors.New(fmt.Sprintf("Error loading ROM: %v", err))
return nil, err
}
gamename = rom.GameName()
switch region {
case NTSC:
cpuDivisor = rp2ago3.NTSCCPUClockDivisor
case PAL:
cpuDivisor = rp2ago3.PALCPUClockDivisor
}
}
ctrls := NewControllers()
DefaultFPS := DefaultFPSNTSC
if region == PAL {
DefaultFPS = DefaultFPSPAL
}
fps := NewFPS(DefaultFPS)
events := make(chan Event)
framePool := &sync.Pool{New: func() interface{} { return make([]uint8, rp2cgo2.FrameSize) }}
video, err = NewVideo(gamename, events, framePool, DefaultFPS)
if err != nil {
err = errors.New(fmt.Sprintf("Error creating video: %v", err))
return
}
audio, err = NewAudio(audioFrequency, audioSampleSize)
if err != nil {
err = errors.New(fmt.Sprintf("Error creating audio: %v", err))
return
}
switch options.Recorder {
case "none":
// none
case "jpeg":
recorder, err = NewJPEGRecorder()
case "gif":
recorder, err = NewGIFRecorder()
}
if err != nil {
err = errors.New(fmt.Sprintf("Error creating recorder: %v", err))
return
}
switch options.AudioRecorder {
case "none":
// none
case "wav":
audioRecorder, err = NewWAVRecorder()
}
if err != nil {
err = errors.New(fmt.Sprintf("Error creating audio recorder: %v", err))
return
}
cpu.Memory.AddMappings(ppu, rp2ago3.CPU)
cpu.Memory.AddMappings(ctrls, rp2ago3.CPU)
if master {
cpu.Memory.AddMappings(rom, rp2ago3.CPU)
ppu.Memory.AddMappings(rom, rp2ago3.PPU)
}
lock := make(chan uint64, 1)
lock <- 0
nes = &NES{
GameName: gamename,
events: events,
CPU: cpu,
CPUDivisor: cpuDivisor,
PPU: ppu,
ROM: rom,
audio: audio,
video: video,
DefaultFPS: DefaultFPS,
fps: fps,
recorder: recorder,
audioRecorder: audioRecorder,
controllers: ctrls,
options: options,
lock: lock,
Tick: 0,
master: master,
bridge: bridge,
framePool: framePool,
}
bridge.nes = nes
return
}
func TestHorizontalMirroring(t *testing.T) {
ppu := rp2cgo2.NewRP2C02(nil, "NTSC")
ppu.Nametable.SetTables(0, 0, 1, 1)
// Mirror nametable #1 to #0
for i := uint16(0x2400); i <= 0x27ff; i++ {
ppu.Memory.Store(i-0x0400, 0xff)
if ppu.Memory.Fetch(i) != 0xff {
t.Error("Memory is not 0xff")
}
ppu.Memory.Store(i-0x0400, 0x00)
ppu.Memory.Store(i, 0xff)
if ppu.Memory.Fetch(i-0x0400) != 0xff {
t.Error("Memory is not 0xff")
}
ppu.Memory.Store(i, 0x00)
}
// Mirror nametable #3 to #2
for i := uint16(0x2c00); i <= 0x2fff; i++ {
ppu.Memory.Store(i-0x0400, 0xff)
if ppu.Memory.Fetch(i) != 0xff {
t.Error("Memory is not 0xff")
}
ppu.Memory.Store(i-0x0400, 0x00)
ppu.Memory.Store(i, 0xff)
if ppu.Memory.Fetch(i-0x0400) != 0xff {
t.Error("Memory is not 0xff")
}
ppu.Memory.Store(i, 0x00)
}
// Mirror nametable #1 to #0
for i := uint16(0x3400); i <= 0x37ff; i++ {
ppu.Memory.Store(i-0x1400, 0xff)
if ppu.Memory.Fetch(i) != 0xff {
t.Error("Memory is not 0xff")
}
ppu.Memory.Store(i-0x1400, 0x00)
ppu.Memory.Store(i, 0xff)
if ppu.Memory.Fetch(i-0x1400) != 0xff {
t.Error("Memory is not 0xff")
}
ppu.Memory.Store(i, 0x00)
}
// Mirror nametable #3 to #2
for i := uint16(0x3c00); i <= 0x3eff; i++ {
ppu.Memory.Store(i-0x1400, 0xff)
if ppu.Memory.Fetch(i) != 0xff {
t.Error("Memory is not 0xff")
}
ppu.Memory.Store(i-0x1400, 0x00)
ppu.Memory.Store(i, 0xff)
if ppu.Memory.Fetch(i-0x1400) != 0xff {
t.Error("Memory is not 0xff")
}
ppu.Memory.Store(i, 0x00)
}
}