package apple2 import ( "io" ) type card interface { loadRom(data []uint8) assign(a *Apple2, slot int) persistent } type cardBase struct { a *Apple2 rom *memoryRange romExtra *memoryRange slot int ssr [16]softSwitchR ssw [16]softSwitchW } func (c *cardBase) loadRom(data []uint8) { if c.a != nil { panic("Rom must be loaded before inserting the card in the slot") } if len(data) >= 0x100 { c.rom = newMemoryRange(0, data) } if len(data) >= 0x800 { c.romExtra = newMemoryRange(0, data) } } func (c *cardBase) assign(a *Apple2, slot int) { c.a = a c.slot = slot if slot != 0 && c.rom != nil { c.rom.base = uint16(0xc000 + slot*0x100) a.mmu.setPagesRead(uint8(0xc0+slot), uint8(0xc0+slot), c.rom) } if slot != 0 && c.romExtra != nil { c.romExtra.base = uint16(0xc800) a.mmu.prepareCardExtraRom(slot, c.romExtra) } for i := 0; i < 0x10; i++ { a.io.addSoftSwitchR(uint8(0xC80+slot*0x10+i), c.ssr[i]) a.io.addSoftSwitchW(uint8(0xC80+slot*0x10+i), c.ssw[i]) } } func (c *cardBase) save(w io.Writer) { // Empty } func (c *cardBase) load(r io.Reader) { // Empty }