func createCpu() *Cpu {
ram := &memory.Ram{}
addressBus, _ := bus.CreateBus()
addressBus.Attach(ram, "ram", 0x8000) // upper 32K
cpu := &Cpu{Bus: addressBus}
cpu.Reset()
return cpu
}
func mainReturningStatus() int {
options := cli.ParseFlags()
// Create addressable devices.
kernal, err := memory.RomFromFile(kernalPath)
if err != nil {
panic(err)
}
charRom, err := memory.RomFromFile(charRomPath)
if err != nil {
panic(err)
}
ram := &memory.Ram{}
via := via6522.NewVia6522(via6522.Options{
DumpAscii: options.ViaDumpAscii,
DumpBinary: options.ViaDumpBinary,
})
if options.Ili9340 {
ili9340, err := ili9340.NewDisplay(spi.PinMap{
Sclk: 0,
Mosi: 6,
Miso: 7,
Ss: 5,
})
if err != nil {
panic(err)
}
via.AttachToPortB(ili9340)
}
if options.ViaSsd1306 {
ssd1306 := ssd1306.NewSsd1306()
via.AttachToPortA(ssd1306)
}
if len(options.SdCard) > 0 {
sd, err := sd.NewSdCardPeripheral(spi.PinMap{
Sclk: 0,
Mosi: 6,
Miso: 7,
Ss: 4,
})
if err != nil {
panic(err)
}
err = sd.LoadFile(options.SdCard)
if err != nil {
panic(err)
}
via.AttachToPortB(sd)
}
via.Reset()
// Attach devices to address bus.
addressBus, _ := bus.CreateBus()
addressBus.Attach(ram, "ram", 0x0000)
addressBus.Attach(via, "VIA", 0x9000)
addressBus.Attach(charRom, "char", 0xB000)
addressBus.Attach(kernal, "kernal", 0xF000)
exitChan := make(chan int, 0)
cpu := &cpu.Cpu{Bus: addressBus, ExitChan: exitChan}
defer cpu.Shutdown()
if options.Debug {
debugger := debugger.NewDebugger(cpu, options.DebugSymbolFile)
debugger.QueueCommands(options.DebugCmds)
cpu.AttachMonitor(debugger)
} else if options.Speedometer {
speedo := speedometer.NewSpeedometer()
cpu.AttachMonitor(speedo)
}
cpu.Reset()
// Dispatch CPU in a goroutine.
go func() {
for {
cpu.Step()
}
}()
var (
sig os.Signal
exitStatus int
)
sigChan := make(chan os.Signal, 1)
signal.Notify(sigChan, os.Interrupt)
select {
case exitStatus = <-exitChan:
// pass
case sig = <-sigChan:
fmt.Println("\nGot signal:", sig)
exitStatus = 1
}
fmt.Println(cpu)
fmt.Println("Dumping RAM into core file")
ram.Dump("core")
return exitStatus
}