2024-03-24 20:15:16 +01:00

55 lines
1.6 KiB

package izapple2
Simulates just what is needed to make Total Replay use the GS modes if the VidHD card is found
http://www.applelogic.org/files/GSHARDWAREREF.pdf, page 89
// CardVidHD represents a VidHD card
type CardVidHD struct {
func newCardVidHDBuilder() *cardBuilder {
return &cardBuilder{
name: "VidHD Card - limited",
description: "Firmware signature of the VidHD card to trick Total Replay to use the SHR mode",
buildFunc: func(params map[string]string) (Card, error) {
var c CardVidHD
c.loadRom(buildVidHDRom(), cardRomSimple)
return &c, nil
func buildVidHDRom() []uint8 {
data := make([]uint8, 256)
data[0] = 0x24
data[1] = 0xEA
data[2] = 0x4C
return data
const (
ioDataNewVideo uint8 = 0x29
func (c *CardVidHD) assign(a *Apple2, slot int) {
// The softswitches are outside the card reserved ss
a.io.addSoftSwitchR(0x22, buildNotImplementedSoftSwitchR(a.io), "VIDHD-TBCOLOR")
a.io.addSoftSwitchW(0x22, buildNotImplementedSoftSwitchW(a.io), "VIDHD-TBCOLOR")
a.io.addSoftSwitchR(0x29, getStatusSoftSwitch(a.io, ioDataNewVideo), "VIDHD-NEWVIDEO")
a.io.addSoftSwitchW(0x29, setStatusSoftSwitch(a.io, ioDataNewVideo), "VIDHD-NEWVIDEO")
a.io.addSoftSwitchR(0x34, buildNotImplementedSoftSwitchR(a.io), "VIDHD-CLOCKCTL")
a.io.addSoftSwitchW(0x34, buildNotImplementedSoftSwitchW(a.io), "VIDHD-CLOCKCTL")
a.io.addSoftSwitchR(0x35, buildNotImplementedSoftSwitchR(a.io), "VIDHD-SHADOW")
a.io.addSoftSwitchW(0x35, buildNotImplementedSoftSwitchW(a.io), "VIDHD-SHADOW")
c.cardBase.assign(a, slot)