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Original file line number | Diff line number | Diff line change |
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package izapple2 | ||
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import "fmt" | ||
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/* | ||
ProDOS-ROM-Drive: A bootable 1 MB solid state disk for Apple ][ computers | ||
Emulates version 4.0+ | ||
See: | ||
https://github.com/tjboldt/ProDOS-ROM-Drive | ||
https://github.com/Alex-Kw/ProDOS-ROM-Drive-Images | ||
*/ | ||
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// CardMemoryExpansion is a Memory Expansion card | ||
type CardProDOSRomDrive struct { | ||
cardBase | ||
address uint16 | ||
data []uint8 | ||
} | ||
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const proDOSRomDriveMask = 0xf_ffff // 1 MB mask | ||
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func newCardProDOSRomDriveBuilder() *cardBuilder { | ||
return &cardBuilder{ | ||
name: "ProDOS ROM Drive", | ||
description: "A bootable 1 MB solid state disk", | ||
defaultParams: &[]paramSpec{ | ||
//∫{"image", "ROM image with the ProDOS volume", "https://github.com/tjboldt/ProDOS-ROM-Drive/raw/v4.0/Firmware/GamesWithFirmware.po"}, | ||
{"image", "ROM image with the ProDOS volume", "https://github.com/Alex-Kw/ProDOS-ROM-Drive-Images/raw/main/ProDOS242_Beta5.po"}, | ||
}, | ||
buildFunc: func(params map[string]string) (Card, error) { | ||
image := paramsGetPath(params, "image") | ||
if image == "" { | ||
return nil, fmt.Errorf("image required for the ProDOS ROM drive") | ||
} | ||
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data, _, err := LoadResource(image) | ||
if err != nil { | ||
return nil, err | ||
} | ||
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var c CardProDOSRomDrive | ||
c.data = data | ||
c.loadRom(data[0x300:0x400]) | ||
return &c, nil | ||
}, | ||
} | ||
} | ||
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func (c *CardProDOSRomDrive) assign(a *Apple2, slot int) { | ||
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// Set pointer position | ||
c.addCardSoftSwitchW(0, func(value uint8) { | ||
c.address = uint16(value) | c.address&0xff00 | ||
}, "LATCHLO") | ||
c.addCardSoftSwitchW(1, func(value uint8) { | ||
c.address = uint16(value)<<8 | c.address&0xff | ||
}, "LATCHHI") | ||
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// Read data | ||
for i := uint8(0x0); i <= 0xf; i++ { | ||
iCopy := i | ||
c.addCardSoftSwitchR(iCopy, func() uint8 { | ||
offset := uint32(c.address)<<4 + uint32(iCopy) | ||
offset &= proDOSRomDriveMask | ||
return c.data[offset] | ||
}, fmt.Sprintf("READ%X", iCopy)) | ||
} | ||
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c.cardBase.assign(a, slot) | ||
} |
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