2020-10-03 21:38:26 +00:00
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package izapple2
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2019-11-10 13:20:31 +00:00
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/*
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Simulates just what is needed to make Total Replay use the GS modes if the VidHD card is found
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See:
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https://github.com/a2-4am/4cade/blob/master/src/hw.vidhd.a
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2019-11-11 21:58:42 +00:00
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http://www.applelogic.org/files/GSHARDWAREREF.pdf, page 89
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2019-11-10 13:20:31 +00:00
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*/
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2020-10-13 22:26:47 +00:00
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// CardVidHD represents a VidHD card
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type CardVidHD struct {
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2019-11-10 13:20:31 +00:00
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cardBase
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}
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2024-01-06 20:48:23 +00:00
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func newCardVidHDBuilder() *cardBuilder {
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return &cardBuilder{
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name: "VidHD Card - limited",
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2024-02-08 21:17:14 +00:00
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description: "Firmware signature of the VidHD card to trick Total Replay to use the SHR mode",
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2024-01-06 20:48:23 +00:00
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buildFunc: func(params map[string]string) (Card, error) {
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var c CardVidHD
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2024-03-24 19:15:16 +00:00
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c.loadRom(buildVidHDRom(), cardRomSimple)
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2024-01-06 20:48:23 +00:00
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return &c, nil
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},
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}
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2020-10-13 22:26:47 +00:00
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}
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2019-11-10 13:20:31 +00:00
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func buildVidHDRom() []uint8 {
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data := make([]uint8, 256)
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data[0] = 0x24
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data[1] = 0xEA
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data[2] = 0x4C
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return data
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}
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2019-11-11 21:58:42 +00:00
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const (
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ioDataNewVideo uint8 = 0x29
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)
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2020-10-13 22:26:47 +00:00
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func (c *CardVidHD) assign(a *Apple2, slot int) {
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2019-11-12 22:47:48 +00:00
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// The softswitches are outside the card reserved ss
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2022-08-05 17:43:17 +00:00
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a.io.addSoftSwitchR(0x22, buildNotImplementedSoftSwitchR(a.io), "VIDHD-TBCOLOR")
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a.io.addSoftSwitchW(0x22, buildNotImplementedSoftSwitchW(a.io), "VIDHD-TBCOLOR")
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a.io.addSoftSwitchR(0x29, getStatusSoftSwitch(a.io, ioDataNewVideo), "VIDHD-NEWVIDEO")
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a.io.addSoftSwitchW(0x29, setStatusSoftSwitch(a.io, ioDataNewVideo), "VIDHD-NEWVIDEO")
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a.io.addSoftSwitchR(0x34, buildNotImplementedSoftSwitchR(a.io), "VIDHD-CLOCKCTL")
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a.io.addSoftSwitchW(0x34, buildNotImplementedSoftSwitchW(a.io), "VIDHD-CLOCKCTL")
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a.io.addSoftSwitchR(0x35, buildNotImplementedSoftSwitchR(a.io), "VIDHD-SHADOW")
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a.io.addSoftSwitchW(0x35, buildNotImplementedSoftSwitchW(a.io), "VIDHD-SHADOW")
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2019-11-11 21:58:42 +00:00
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2019-11-10 13:20:31 +00:00
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c.cardBase.assign(a, slot)
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}
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