izapple2/apple2Setup.go
2019-06-07 20:01:20 +02:00

109 lines
2.6 KiB
Go

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