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https://github.com/ivanizag/izapple2.git
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Experiments with prodos device drivers
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c9bb9f2208
commit
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@ -229,4 +229,8 @@ func (a *Apple2) dumpDebugInfo() {
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d := a.mmu.physicalMainRAM.data[k]
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fmt.Printf(" %v(0x%x): 0x%02x\n", pageZeroSymbols[k], k, d)
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}
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if a.traceMLI != nil {
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a.traceMLI.dumpDevices()
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}
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}
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@ -8,21 +8,28 @@ type traceProDOS struct {
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functionCode uint8
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paramsAdddress uint16
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returnAddress uint16
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deviceDrivers []uint16
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}
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const (
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mliAddress uint16 = 0xbf00
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biAddress uint16 = 0xbe03
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deviceCountAddress uint16 = 0xbf31 // DEVCNT
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deviceListAddress uint16 = 0xbf32
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deviceDriverVectors uint16 = 0xbf10 // DEVADR01
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deviceDateTimeVector uint16 = 0xbf07 // DATETIME+1
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)
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func newTraceProDOS(a *Apple2) *traceProDOS {
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var t traceProDOS
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t.a = a
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t.deviceDrivers = make([]uint16, 0)
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return &t
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}
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func (t *traceProDOS) inspect() {
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pc, ps := t.a.cpu.GetPCAndSP()
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pc, _ := t.a.cpu.GetPCAndSP()
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if pc == mliAddress {
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/*
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MLI has been called (provided we are running proDOS and the proper page)
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@ -39,6 +46,24 @@ func (t *traceProDOS) inspect() {
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fmt.Print("<there was a call pending>\n")
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}
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}
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t.dumpMLICall()
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t.refreshDeviceDrives()
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t.callPending = true
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//t.a.cpu.SetTrace(true)
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} else if t.callPending && pc == t.returnAddress {
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t.dumpMLIReturn()
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t.callPending = false
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//t.a.cpu.SetTrace(false)
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} else if pc == biAddress {
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t.dumpBIExec()
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} else if /*t.callPending &&*/ t.isDriverAddress(pc) {
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fmt.Printf(" <<< Calling a driver in $%04x >>> ", pc)
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}
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}
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func (t *traceProDOS) dumpMLICall() {
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_, ps := t.a.cpu.GetPCAndSP()
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caller := uint16(t.a.mmu.Peek(0x100+uint16(ps+1))) +
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uint16(t.a.mmu.Peek(0x100+uint16(ps+2)))<<8 - 2
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t.functionCode = t.a.mmu.Peek(caller + 3)
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@ -98,9 +123,9 @@ func (t *traceProDOS) inspect() {
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fmt.Printf(" GET_BUF(ref=%v)", t.paramByte(1))
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}
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fmt.Printf(" => ")
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}
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t.callPending = true
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} else if t.callPending && pc == t.returnAddress {
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func (t *traceProDOS) dumpMLIReturn() {
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error, acc := t.a.cpu.GetCarryAndAcc()
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if error {
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fmt.Printf("error $%02x: %v\n", acc, getMliErrorText(acc))
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@ -158,8 +183,9 @@ func (t *traceProDOS) inspect() {
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fmt.Printf("Ok\n")
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}
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}
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t.callPending = false
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} else if pc == biAddress {
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}
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func (t *traceProDOS) dumpBIExec() {
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s := ""
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for i := uint16(1); i < 256; i++ {
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ch := t.a.mmu.Peek(0x200 + i)
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@ -169,7 +195,64 @@ func (t *traceProDOS) inspect() {
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s += string(ch)
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}
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fmt.Printf("Prodos BI exec: \"%s\".\n", s)
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}
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func (t *traceProDOS) dumpDevices() {
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// Active disk devices
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// See https://prodos8.com/docs/techref/writing-a-prodos-system-program/#page94
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// See https://prodos8.com/docs/technote/21/
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mem := t.a.mmu.getPhysicalMainRAM(false)
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count := mem.peek(deviceCountAddress) + 1
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fmt.Printf("Prodos disk devices: \n")
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for i := uint8(0); i < count; i++ {
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value := mem.peek(deviceListAddress + uint16(i))
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id := "unknown"
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switch value & 0xf {
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case 0x0:
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id = "DiskII"
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case 0x4:
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id = "ProFile" // Used also be the Memory Expansion Ram disk
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case 0xf:
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id = "RAM"
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}
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fmt.Printf((" S%vD%v %s($%02x)\n"), (value>>4)&7, (value>>7)+1, id, value)
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}
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// Device drivers
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fmt.Printf("ProDOS device drivers:\n")
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for slot := uint16(0); slot <= 7; slot++ {
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for drive := uint16(0); drive < 2; drive++ {
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address := deviceDriverVectors + (slot+drive*8)*2
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value := uint16(mem.peek(address)) + 0x100*uint16(mem.peek(address+1))
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fmt.Printf(" S%vD%v: $%04x\n", slot, drive+1, value)
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}
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}
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}
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func (t *traceProDOS) refreshDeviceDrives() {
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mem := t.a.mmu.getPhysicalMainRAM(false)
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drivers := make([]uint16, 0, 14)
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for i := uint16(0); i < 16; i++ {
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address := deviceDriverVectors + i*2
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value := uint16(mem.peek(address)) + 0x100*uint16(mem.peek(address+1))
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drivers = append(drivers, value)
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}
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// Datetime
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value := uint16(mem.peek(deviceDateTimeVector)) + 0x100*uint16(mem.peek(deviceDateTimeVector+1))
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drivers = append(drivers, value)
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t.deviceDrivers = drivers
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}
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func (t *traceProDOS) isDriverAddress(pc uint16) bool {
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for _, vector := range t.deviceDrivers {
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if vector == pc {
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return true
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}
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}
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return false
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}
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func (t *traceProDOS) paramByte(pos uint16) uint8 {
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