110 lines
2.6 KiB
Go
110 lines
2.6 KiB
Go
package apple2
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import "github.com/ivanizag/apple2/core6502"
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// NewApple2 instantiates an apple2
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func NewApple2(charRomFile string, clockMhz float64,
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isColor bool, fastMode bool, panicSS bool) *Apple2 {
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var a Apple2
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a.Name = "Apple ][+"
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a.mmu = newMemoryManager(&a)
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a.cpu = core6502.NewNMOS6502(a.mmu)
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if charRomFile != "" {
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a.cg = NewCharacterGenerator(charRomFile)
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}
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a.commandChannel = make(chan int, 100)
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a.isColor = isColor
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a.fastMode = fastMode
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a.panicSS = panicSS
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if clockMhz <= 0 {
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// Full speed
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a.cycleDurationNs = 0
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} else {
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a.cycleDurationNs = 1000.0 / clockMhz
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}
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// Set the io in 0xc000
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a.io = newIoC0Page(&a)
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a.mmu.setPages(0xc0, 0xc0, a.io)
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return &a
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}
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func (a *Apple2) insertCard(c card, slot int) {
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c.assign(a, slot)
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a.cards[slot] = c
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}
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const (
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apple2RomSize = 12 * 1024
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apple2eRomSize = 16 * 1024
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)
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// LoadRom loads a standard Apple2+ or 2e ROM
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func (a *Apple2) LoadRom(filename string) {
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data := loadResource(filename)
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size := len(data)
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if size != apple2RomSize && size != apple2eRomSize {
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panic("Rom size not supported")
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}
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romStart := 0
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mmu := a.mmu
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if size == apple2eRomSize {
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// The extra 4kb ROM is first in the rom file.
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// It starts with 256 unused bytes not mapped to 0xc000.
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a.isApple2e = true
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extraRomSize := apple2eRomSize - apple2RomSize
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mmu.physicalROMe = newMemoryRange(0xc000, data[0:extraRomSize])
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romStart = extraRomSize
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}
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mmu.physicalROM = newMemoryRange(0xd000, data[romStart:])
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mmu.resetRomPaging()
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}
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// AddDisk2 insterts a DiskII controller
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func (a *Apple2) AddDisk2(slot int, diskRomFile string, diskImage string) {
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var c cardDisk2
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c.loadRom(diskRomFile)
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a.insertCard(&c, slot)
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if diskImage != "" {
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diskette := loadDisquette(diskImage)
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//diskette.saveNib(diskImage + "bak")
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c.drive[0].insertDiskette(diskette)
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}
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}
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// AddLanguageCard inserts a 16Kb card
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func (a *Apple2) AddLanguageCard(slot int) {
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a.insertCard(&cardLanguage{}, slot)
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}
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// AddSaturnCard inserts a 128Kb card
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func (a *Apple2) AddSaturnCard(slot int) {
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a.insertCard(&cardSaturn{}, slot)
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}
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// AddCardLogger inserts a fake card that logs accesses
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func (a *Apple2) AddCardLogger(slot int) {
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a.insertCard(&cardLogger{}, slot)
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}
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// AddCardInOut inserts a fake card that interfaces with the emulator host
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func (a *Apple2) AddCardInOut(slot int) {
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a.insertCard(&cardInOut{}, slot)
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}
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// SetKeyboardProvider attaches an external keyboard provider
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func (a *Apple2) SetKeyboardProvider(kb KeyboardProvider) {
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a.io.setKeyboardProvider(kb)
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}
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// SetSpeakerProvider attaches an external keyboard provider
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func (a *Apple2) SetSpeakerProvider(s SpeakerProvider) {
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a.io.setSpeakerProvider(s)
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}
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