izapple2/cardBase.go
2019-11-09 18:13:19 +01:00

74 lines
1.5 KiB
Go

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
_ssrName [16]string
_sswName [16]string
}
func (c *cardBase) loadRom(data []uint8) {
if c.a != nil {
panic("Assert failed. 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], c._ssrName[i])
a.io.addSoftSwitchW(uint8(0xC80+slot*0x10+i), c._ssw[i], c._sswName[i])
}
}
func (c *cardBase) addCardSoftSwitchR(address uint8, ss softSwitchR, name string) {
c._ssr[address] = ss
c._ssrName[address] = name
}
func (c *cardBase) addCardSoftSwitchW(address uint8, ss softSwitchW, name string) {
c._ssw[address] = ss
c._sswName[address] = name
}
func (c *cardBase) save(w io.Writer) error {
// Empty
return nil
}
func (c *cardBase) load(r io.Reader) error {
// Empty
return nil
}