// Run runs the commandLoop.
// The loop waits for commands sent to sms.command channel.
func (l *commandLoop) Run() {
for {
select {
case <-l.pause:
l.pause <- 0
case <-l.terminate:
l.terminate <- 0
case _cmd := <-l.emulatorLoop.sms.command:
switch cmd := _cmd.(type) {
case cmdRenderFrame:
l.displayLoop.Display() <- l.emulatorLoop.sms.frame()
case cmdLoadRom:
l.emulatorLoop.sms.loadRom(cmd.fileName)
case cmdJoypadEvent:
l.emulatorLoop.sms.joypad(cmd.value, cmd.event)
case cmdPauseEmulation:
l.emulatorLoop.pauseEmulation <- 0
<-l.emulatorLoop.pauseEmulation
cmd.paused <- l.emulatorLoop.sms.paused
case cmdShowCurrentInstruction:
prevAddr := z80.PreviousInstruction(l.emulatorLoop.sms.memory, l.emulatorLoop.sms.cpu.PC())
res, address, shift := z80.Disassemble(l.emulatorLoop.sms.memory, prevAddr, 0)
if res != "shift " {
application.Logf("0x%04x %s\n", l.emulatorLoop.sms.cpu.PC(), res)
}
res, address, shift = z80.Disassemble(l.emulatorLoop.sms.memory, l.emulatorLoop.sms.cpu.PC(), 0)
if res != "shift " {
application.Logf("0x%04x %s\n", l.emulatorLoop.sms.cpu.PC(), res)
}
for i := 0; i < 20; i++ {
oldAddress := address
res, address, shift = z80.Disassemble(l.emulatorLoop.sms.memory, address, shift)
if res != "shift " {
application.Logf("0x%04x %s\n", oldAddress, res)
}
// address++
}
}
}
}
}
// Disassemble the instruction at the given pc and return the address,
// machine language, and instruction. Return the PC of the following
// instruction in nextPc.
func (vm *vm) disasm(pc uint16) (line string, nextPc uint16) {
var asm string
shift := 0
// Disassemble the instruction.
for {
asm, nextPc, shift = z80.Disassemble(vm, pc, shift)
// Keep going as long as shift != 0. This is for extended instructions like 0xCB.
if shift == 0 {
break
}
}
// Address.
line = fmt.Sprintf("%04X ", pc)
// Machine language.
for addr := pc; addr < pc+4; addr++ {
if addr < nextPc {
line += fmt.Sprintf("%02X ", vm.memory[addr])
} else {
line += fmt.Sprint(" ")
}
}
// Instruction.
line += asm
return
}