mirror of
https://github.com/ivanizag/izapple2.git
synced 2024-11-20 00:32:05 +00:00
66 lines
2.2 KiB
Go
66 lines
2.2 KiB
Go
package apple2
|
|
|
|
const (
|
|
ioFlagIntCxRom uint8 = 0x15
|
|
ioFlagSlotC3Rom uint8 = 0x17
|
|
ioFlag80Store uint8 = 0x18
|
|
ioFlagAltChar uint8 = 0x19
|
|
ioFlag80Col uint8 = 0x1F
|
|
)
|
|
|
|
func addApple2ESoftSwitches(io *ioC0Page) {
|
|
|
|
io.addSoftSwitchW(0x00, getSoftSwitchExt(ioFlag80Store, ssOff, nil))
|
|
io.addSoftSwitchW(0x01, getSoftSwitchExt(ioFlag80Store, ssOn, nil))
|
|
io.addSoftSwitchW(0x06, getSoftSwitchExt(ioFlagIntCxRom, ssOff, softSwitchIntCxRomOff))
|
|
io.addSoftSwitchW(0x07, getSoftSwitchExt(ioFlagIntCxRom, ssOn, softSwitchIntCxRomOn))
|
|
io.addSoftSwitchW(0x0A, getSoftSwitchExt(ioFlagSlotC3Rom, ssOff, softSwitchSlotC3RomOff))
|
|
io.addSoftSwitchW(0x0B, getSoftSwitchExt(ioFlagSlotC3Rom, ssOn, softSwitchSlotC3RomOn))
|
|
io.addSoftSwitchW(0x0C, getSoftSwitchExt(ioFlag80Col, ssOff, nil))
|
|
io.addSoftSwitchW(0x0D, getSoftSwitchExt(ioFlag80Col, ssOn, nil))
|
|
io.addSoftSwitchW(0x0E, getSoftSwitchExt(ioFlagAltChar, ssOff, nil))
|
|
io.addSoftSwitchW(0x0F, getSoftSwitchExt(ioFlagAltChar, ssOn, nil))
|
|
io.softSwitchesData[ioFlagAltChar] = ssOn // Not sure about this.
|
|
|
|
io.addSoftSwitchR(0x15, getStatusSoftSwitch(ioFlagIntCxRom))
|
|
io.addSoftSwitchR(0x17, getStatusSoftSwitch(ioFlagSlotC3Rom))
|
|
io.addSoftSwitchR(0x18, getStatusSoftSwitch(ioFlag80Store))
|
|
io.addSoftSwitchR(0x1C, getStatusSoftSwitch(ioFlagSecondPage))
|
|
io.addSoftSwitchR(0x1F, getStatusSoftSwitch(ioFlag80Col))
|
|
}
|
|
|
|
type softSwitchExtAction func(io *ioC0Page)
|
|
|
|
func getSoftSwitchExt(ioFlag uint8, dstValue uint8, action softSwitchExtAction) softSwitchW {
|
|
return func(io *ioC0Page, _ uint8) {
|
|
currentValue := io.softSwitchesData[ioFlag]
|
|
if currentValue == dstValue {
|
|
return // Already switched, ignore
|
|
}
|
|
if action != nil {
|
|
action(io)
|
|
}
|
|
io.softSwitchesData[ioFlag] = dstValue
|
|
}
|
|
}
|
|
|
|
func softSwitchIntCxRomOn(io *ioC0Page) {
|
|
io.apple2.mmu.setPagesRead(0xc1, 0xcf, io.apple2.mmu.physicalROMe)
|
|
}
|
|
|
|
func softSwitchIntCxRomOff(io *ioC0Page) {
|
|
// TODO restore all the ROM from the slots for 0xc1 to 0xc7
|
|
io.apple2.mmu.setPages(0xc1, 0xc7, nil)
|
|
}
|
|
|
|
func softSwitchSlotC3RomOn(io *ioC0Page) {
|
|
// TODO restore the slot 3 ROM
|
|
io.apple2.mmu.setPages(0xc3, 0xc3, nil)
|
|
}
|
|
|
|
func softSwitchSlotC3RomOff(io *ioC0Page) {
|
|
io.apple2.mmu.setPagesRead(0xc3, 0xc3, io.apple2.mmu.physicalROMe)
|
|
}
|
|
|
|
// TODO: apply state after persistance load
|