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izapple2
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Apple IIe rom boots with all the ROM shadowing in place.

This commit is contained in:
Ivan Izaguirre 2019-02-24 14:37:10 +01:00
parent d2c897f7ea
commit 645c37049f
4 changed files with 82 additions and 32 deletions
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10
apple2/ansiConsoleFrontend.go
View File

@ -8,6 +8,15 @@ import (
"time"
)
/*
Uses the console standard input and output to interface with the machine.
Input is buffered until the next CR. This avoids working in place, a line
for input is added at the end.
Outut is done in place using ANSI escape sequences.
Those tricks do not work with the Apple2e ROM
*/
type ansiConsoleFrontend struct {
keyChannel chan uint8
extraLineFeeds chan int
@ -100,6 +109,7 @@ func (fe *ansiConsoleFrontend) textModeGoRoutine(tp *textPages) {
func textMemoryByteToString(value uint8) string {
// See https://en.wikipedia.org/wiki/Apple_II_character_set
// Only ascii from 0x20 to 0x5F is visible
// Does not support the new lowercase characters in the Apple2e
topBits := value >> 6
isInverse := topBits == 0
isFlash := topBits == 1

56
apple2/ioC0Page.go
View File

@ -22,7 +22,13 @@ type keyboardProvider interface {
// See https://stason.org/TULARC/pc/apple2/programmer/004-I-d-like-to-do-some-serious-Apple-II-programming-Whe.html
const (
ioDataKeyboard uint8 = 0x10
ssOn uint8 = 0x80
ssOff uint8 = 0x00
)
const (
ioDataKeyboard uint8 = 0x10
ioFlagGraphics uint8 = 0x50
ioFlagMixed uint8 = 0x52
ioFlagSecondPage uint8 = 0x54
@ -31,10 +37,19 @@ const (
ioFlagAnnunciator1 uint8 = 0x5a
ioFlagAnnunciator2 uint8 = 0x5c
ioFlagAnnunciator3 uint8 = 0x5e
ioDataCassette uint8 = 0x60
ioFlagButton0 uint8 = 0x61
ioFlagButton1 uint8 = 0x62
ioFlagButton2 uint8 = 0x63
ioDataPaddle0 uint8 = 0x64
ioDataPaddle1 uint8 = 0x65
ioDataPaddle2 uint8 = 0x66
ioDataPaddle3 uint8 = 0x67
)
func (p *ioC0Page) isSoftSwitchExtActive(ioFlag uint8) bool {
return (p.softSwitchesData[ioFlag] & 0x08) == 0x80
return (p.softSwitchesData[ioFlag] & ssOn) == ssOn
}
func newIoC0Page(mmu *memoryManager) *ioC0Page {
@ -44,7 +59,12 @@ func newIoC0Page(mmu *memoryManager) *ioC0Page {
ss[0x00] = getKeySoftSwitch // Keyboard
ss[0x10] = strobeKeyboardSoftSwitch // Keyboard Strobe
ss[0x20] = notImplementedSoftSwitch // Cassette Output
ss[0x30] = notImplementedSoftSwitch // Speaker
ss[0x40] = notImplementedSoftSwitch // Game connector Strobe
// Note: Some sources indicate that all these cover 16 positions
// for read and write. But the Apple2e take over some of them, with
// the prevention on acting only on writes.
ss[0x50] = getSoftSwitch(ioFlagGraphics, false)
ss[0x51] = getSoftSwitch(ioFlagGraphics, true)
@ -63,6 +83,24 @@ func newIoC0Page(mmu *memoryManager) *ioC0Page {
ss[0x5e] = getSoftSwitch(ioFlagAnnunciator3, false)
ss[0x5f] = getSoftSwitch(ioFlagAnnunciator3, true)
ss[0x60] = notImplementedSoftSwitch // Cassetter Input
ss[0x61] = getStatusSoftSwitch(ioFlagButton0)
ss[0x62] = getStatusSoftSwitch(ioFlagButton1)
ss[0x63] = getStatusSoftSwitch(ioFlagButton2)
ss[0x64] = getStatusSoftSwitch(ioDataPaddle0)
ss[0x65] = getStatusSoftSwitch(ioDataPaddle1)
ss[0x66] = getStatusSoftSwitch(ioDataPaddle2)
ss[0x67] = getStatusSoftSwitch(ioDataPaddle3)
ss[0x68] = ss[0x60]
ss[0x69] = ss[0x61]
ss[0x6A] = ss[0x62]
ss[0x6B] = ss[0x63]
ss[0x6C] = ss[0x64]
ss[0x6D] = ss[0x65]
ss[0x6E] = ss[0x66]
ss[0x6F] = ss[0x67]
ss[0x70] = notImplementedSoftSwitch // Game controllers reset
return &p
}
@ -81,8 +119,8 @@ func (p *ioC0Page) Poke(address uint8, value uint8) {
}
func (p *ioC0Page) access(address uint8, isWrite bool, value uint8) uint8 {
// The second hals of the pages is reserved for slots
if address >= 0x80 {
// The second half of the pages is reserved for slots
if address >= 0x90 {
// TODO reserved slots data
return 0
}
@ -95,12 +133,18 @@ func (p *ioC0Page) access(address uint8, isWrite bool, value uint8) uint8 {
return ss(p, isWrite, value)
}
func getStatusSoftSwitch(ioFlag uint8) softSwitch {
return func(io *ioC0Page, isWrite bool, value uint8) uint8 {
return io.softSwitchesData[ioFlag]
}
}
func getSoftSwitch(ioFlag uint8, isSet bool) softSwitch {
return func(io *ioC0Page, isWrite bool, value uint8) uint8 {
if isSet {
io.softSwitchesData[ioFlag] = 0x80
io.softSwitchesData[ioFlag] = ssOn
} else {
io.softSwitchesData[ioFlag] = 0
io.softSwitchesData[ioFlag] = ssOff
}
return 0
}

7
apple2/pagedMemory.go
View File

@ -1,10 +1,5 @@
package apple2
import (
"fmt"
"reflect"
)
// memoryPage is a data page of 256 bytes
type memoryPage interface {
Peek(uint8) uint8
@ -32,6 +27,6 @@ func (m *pagedMemory) Poke(address uint16, value uint8) {
// SetPage assigns a MemoryPage implementation on the page given
func (m *pagedMemory) SetPage(index uint8, page memoryPage) {
fmt.Printf("Assigning page 0x%02x type %s\n", index, reflect.TypeOf(page))
//fmt.Printf("Assigning page 0x%02x type %s\n", index, reflect.TypeOf(page))
m.data[index] = page
}

41
apple2/softSwitches2e.go
View File

@ -1,45 +1,46 @@
package apple2
import "fmt"
const (
ioFlagIntCxRom uint8 = 0x15
ioFlagSlotC3Rom uint8 = 0x17
ioFlag80Store uint8 = 0x18
ioFlag80Col uint8 = 0x1F
)
func addApple2ESoftSwitches(mmu *memoryManager) {
ss := &mmu.ioPage.softSwitches
ss[0x06] = getSoftSwitchExt(ioFlagIntCxRom, 0x00, softSwitchIntCxRomOff)
ss[0x07] = getSoftSwitchExt(ioFlagIntCxRom, 0x80, softSwitchIntCxRomOn)
ss[0x15] = getStatusSoftSwitchExt(ioFlagIntCxRom)
ss[0x0A] = getSoftSwitchExt(ioFlagSlotC3Rom, 0x00, softSwitchSlotC3RomOff)
ss[0x0B] = getSoftSwitchExt(ioFlagSlotC3Rom, 0x80, softSwitchSlotC3RomOn)
ss[0x17] = getStatusSoftSwitchExt(ioFlagSlotC3Rom)
ss[0x1c] = getStatusSoftSwitchExt(ioFlagSecondPage)
ss[0x00] = getSoftSwitchExt(ioFlag80Store, ssOff, nil)
ss[0x01] = getSoftSwitchExt(ioFlag80Store, ssOn, nil)
ss[0x06] = getSoftSwitchExt(ioFlagIntCxRom, ssOff, softSwitchIntCxRomOff)
ss[0x07] = getSoftSwitchExt(ioFlagIntCxRom, ssOn, softSwitchIntCxRomOn)
ss[0x0A] = getSoftSwitchExt(ioFlagSlotC3Rom, ssOff, softSwitchSlotC3RomOff)
ss[0x0B] = getSoftSwitchExt(ioFlagSlotC3Rom, ssOn, softSwitchSlotC3RomOn)
ss[0x0C] = getSoftSwitchExt(ioFlag80Col, ssOff, nil)
ss[0x0D] = getSoftSwitchExt(ioFlag80Col, ssOn, nil)
ss[0x15] = getStatusSoftSwitch(ioFlagIntCxRom)
ss[0x17] = getStatusSoftSwitch(ioFlagSlotC3Rom)
ss[0x18] = getStatusSoftSwitch(ioFlag80Store)
ss[0x1C] = getStatusSoftSwitch(ioFlagSecondPage)
ss[0x1F] = getStatusSoftSwitch(ioFlag80Col)
}
type softSwitchExtAction func(io *ioC0Page)
func getStatusSoftSwitchExt(ioFlag uint8) softSwitch {
return func(io *ioC0Page, isWrite bool, value uint8) uint8 {
return io.softSwitchesData[ioFlag]
}
}
func getSoftSwitchExt(ioFlag uint8, dstValue uint8, action softSwitchExtAction) softSwitch {
return func(io *ioC0Page, isWrite bool, value uint8) uint8 {
fmt.Printf("Softswitch 0x%02x %v %v\n", ioFlag, isWrite, dstValue)
//fmt.Printf("Softswitch 0x%02x %v %v\n", ioFlag, isWrite, dstValue)
if !isWrite {
return 0 // Ignore reads
return 0 // New Apple2e softswitches ignore reads
}
currentValue := io.softSwitchesData[ioFlag]
if currentValue == dstValue {
return 0 // Already switched, ignore
}
action(io)
if action != nil {
action(io)
}
io.softSwitchesData[ioFlag] = value
return 0
}
@ -53,7 +54,7 @@ func softSwitchIntCxRomOn(io *ioC0Page) {
func softSwitchIntCxRomOff(io *ioC0Page) {
// TODO restore all the ROM from the slot for 0xc1 to 0xc7
for i := 1; i <= 16; i++ {
for i := 1; i < 16; i++ {
io.mmu.activeMemory.SetPage(uint8(0xc0+i), &io.mmu.unassignedExpansionROM[i])
}
}