mirror of
https://github.com/ivanizag/izapple2.git
synced 2024-12-22 09:30:19 +00:00
275 lines
7.1 KiB
Go
275 lines
7.1 KiB
Go
package apple2
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import "fmt"
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type traceProDOS struct {
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a *Apple2
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callPending bool // We assume MLI is not reentrant
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functionCode uint8
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paramsAdddress uint16
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returnAddress 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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)
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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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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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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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Calls to MLI must be:
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JSR $BF00
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DFB function_code
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DW addr_op_parms
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*/
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if t.callPending {
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if t.functionCode == 0x65 {
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// QUIT when successfull does not return
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fmt.Printf("Ok \n")
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} else {
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fmt.Print("<there was a call pending>\n")
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}
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}
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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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t.paramsAdddress = uint16(t.a.mmu.Peek(caller+4)) + uint16(t.a.mmu.Peek(caller+5))<<8
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t.returnAddress = caller + 6
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fmt.Printf("MLI call $%02x from $%04x", t.functionCode, caller)
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switch t.functionCode {
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case 0x40:
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fmt.Printf(" ALLOC_INTERRUPT()")
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case 0x41:
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fmt.Printf(" DEALLOC_INTERRUPT()")
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case 0x65:
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fmt.Printf(" QUIT()")
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case 0x80:
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fmt.Printf(" READ_BLOCK(unit=%s, block=$%04x)", parseUnit(t.paramByte(1)), t.paramWord(4))
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case 0x81:
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fmt.Printf(" WRITE_BLOCK(unit=%s, block=$%04x)", parseUnit(t.paramByte(1)), t.paramWord(4))
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case 0x82:
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fmt.Printf(" GET_TIME()")
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case 0xc0:
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fmt.Printf(" CREATE(\"%s\")", t.paramString(1))
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case 0xc1:
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fmt.Printf(" DESTROY(\"%s\")", t.paramString(1))
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case 0xc2:
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fmt.Printf(" RENAME(old=\"%s\", new=\"%s\")", t.paramString(1), t.paramString(3))
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case 0xc3:
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fmt.Printf(" GET_FILE_INFO(\"%s\")", t.paramString(1))
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case 0xc4:
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fmt.Printf(" SET_FILE_INFO(\"%s\")", t.paramString(1))
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case 0xc5:
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fmt.Printf(" ONLINE(unit=%s)", parseUnit(t.paramByte(1)))
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case 0xc6:
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fmt.Printf(" SET_PREFIX(\"%s\")", t.paramString(1))
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case 0xc7:
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fmt.Printf(" GET_PREFIX()")
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case 0xc8:
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fmt.Printf(" OPEN(\"%s\")", t.paramString(1))
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case 0xc9:
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fmt.Printf(" NEWLINE(ref=%v, mask=$%02x, char=$%02x)", t.paramByte(1), t.paramByte(2), t.paramByte(3))
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case 0xca:
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fmt.Printf(" READ(ref=%v, len=%v)", t.paramByte(1), t.paramWord(4))
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case 0xcb:
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fmt.Printf(" WRITE(ref=%v, len=%v)", t.paramByte(1), t.paramWord(4))
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case 0xcc:
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fmt.Printf(" CLOSE(ref=%v)", t.paramByte(1))
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case 0xcd:
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fmt.Printf(" FLUSH(ref=%v)", t.paramByte(1))
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case 0xce:
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fmt.Printf(" SET_MARK(ref=%v, pos=%v)", t.paramByte(1), t.paramLen(2))
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case 0xcf:
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fmt.Printf(" GET_MARK(ref=%v)", t.paramByte(1))
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case 0xd1:
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fmt.Printf(" GET_EOF(ref=%v)", t.paramByte(1))
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case 0xd2:
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fmt.Printf(" SET_BUF(ref=%v)", t.paramByte(1))
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case 0xd3:
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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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t.callPending = true
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} else if t.callPending && pc == t.returnAddress {
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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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} else {
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switch t.functionCode {
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case 0x82: // Get Time
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// Globals will be updated
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date := uint16(t.a.mmu.Peek(0xbf90)) + uint16(t.a.mmu.Peek(0xbf91))<<8
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minute := t.a.mmu.Peek(0xbf92)
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hour := t.a.mmu.Peek(0xbf93)
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fmt.Printf("%04v-%02v-%02v %02v:%02v\n",
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date>>9+1900, (date>>5)&0x1f, date&0x1f, // Review Y2K
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hour, minute)
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case 0xc5: // Online
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dataAddress := t.paramWord(2)
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for {
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b := t.a.mmu.Peek(dataAddress)
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dataAddress++
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if b == 0 {
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fmt.Printf("\n")
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break
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}
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unit := parseUnit(b)
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size := b & 0xf
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if size != 0 {
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// No error
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name := ""
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for i := uint8(0); i < size; i++ {
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name += string(t.a.mmu.Peek(dataAddress+uint16(i)) & 0x7f)
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}
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fmt.Printf("%s: \"%s\" ", unit, name)
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} else {
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err := t.a.mmu.Peek(dataAddress)
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fmt.Printf("%s: error $%02x ", unit, err)
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}
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if t.paramByte(1) != 0 {
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fmt.Printf("\n")
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break // Only one entry requested
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}
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dataAddress += 15
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}
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case 0xc7: // Get prefix
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fmt.Printf("\"%v\"\n", t.paramString(1))
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case 0xc8: // Open file
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fmt.Printf("ref: %v\n", t.paramByte(5))
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case 0xca: // Read
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fmt.Printf("%v bytes read \n", t.paramByte(6))
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case 0xcb: // Write
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fmt.Printf("%v bytes written \n", t.paramByte(6))
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case 0xcf: // File position
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fmt.Printf("%v\n", t.paramLen(2))
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case 0xd1: // File size
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fmt.Printf("%v bytes\n", t.paramLen(2))
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default:
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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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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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if ch == 0 || ch == 0x8d {
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break
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}
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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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}
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func (t *traceProDOS) paramByte(pos uint16) uint8 {
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return t.a.mmu.Peek(t.paramsAdddress + pos)
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}
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func (t *traceProDOS) paramWord(pos uint16) uint16 {
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// Two bytes
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return uint16(t.a.mmu.Peek(t.paramsAdddress+pos)) + uint16(t.a.mmu.Peek(t.paramsAdddress+pos+1))<<8
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}
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func (t *traceProDOS) paramLen(pos uint16) uint32 {
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// Three bytes
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return uint32(t.paramWord(pos)) + uint32(t.paramByte(pos+2))<<16
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}
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func (t *traceProDOS) paramString(pos uint16) string {
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address := t.paramWord(pos)
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size := t.a.mmu.Peek(address)
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s := ""
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for i := uint8(0); i < size; i++ {
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s += string(t.a.mmu.Peek(address+1+uint16(i)) & 0x7f)
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}
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return s
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}
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func parseUnit(unit uint8) string {
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if unit == 0 {
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return "All"
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}
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drive := unit >> 7
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slot := (unit >> 4) & 7
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return fmt.Sprintf("S%v,D%v", slot, drive+1)
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}
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func getMliErrorText(code uint8) string {
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// From https://prodos8.com/docs/techref/quick-reference-card/
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switch code {
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case 0x00:
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return "No error"
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case 0x01:
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return "Bad system call number"
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case 0x04:
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return "Bad system call parameter count"
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case 0x25:
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return "Interrupt table full"
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case 0x27:
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return "I/O error"
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case 0x28:
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return "No device connected"
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case 0x2B:
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return "Disk write protected"
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case 0x2E:
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return "Disk switched"
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case 0x40:
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return "Invalid pathname"
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case 0x42:
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return "Maximum number of files open"
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case 0x43:
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return "Invalid reference number"
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case 0x44:
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return "Directory not found"
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case 0x45:
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return "Volume not found"
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case 0x46:
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return "File not found"
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case 0x47:
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return "Duplicate filename"
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case 0x48:
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return "Volume full"
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case 0x49:
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return "Volume directory full"
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case 0x4A:
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return "Incompatible file format, also a ProDOS directory"
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case 0x4B:
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return "Unsupported storage_type"
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case 0x4C:
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return "End of file encountered"
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case 0x4D:
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return "Position out of range"
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case 0x4E:
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return "File access error, also file locked"
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case 0x50:
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return "File is open"
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case 0x51:
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return "Directory structure damaged"
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case 0x52:
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return "Not a ProDOS volume"
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case 0x53:
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return "Invalid system call parameter"
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case 0x55:
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return "Volume Control Block table full"
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case 0x56:
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return "Bad buffer address"
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case 0x57:
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return "Duplicate volume"
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case 0x5A:
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return "File structure damaged"
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default:
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return "Unknown error"
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}
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}
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