izapple2/cardRamWorks.go
2020-08-10 20:52:17 +02:00

35 lines
1011 B
Go

package apple2
/*
RAMWorks style card on the Apple IIe aus slot.
https://patents.google.com/patent/US4601018
https://ae.applearchives.com/apple_e/ramworks_iii/ramworks_iii_basic_manual_1.pdf
Diagnostics disks:
https://ae.applearchives.com/apple_e/ramworks_iii/ramworks_diagnostics.zip
It's is like the extra 64kb on an Apple IIe 80col 64kb card, but with up to 256 banks
*/
func setupRAMWorksCard(a *Apple2, banks int) {
a.mmu.initExtendedRAM(banks)
ssr := func(_ *ioC0Page) uint8 {
return a.mmu.extendedRAMBlock
}
ssw := func(_ *ioC0Page, value uint8) {
a.mmu.setExtendedRAMActiveBlock(value)
}
// Does not have a slot assigned
a.io.addSoftSwitchR(0x71, ssr, "RAMWORKSR")
a.io.addSoftSwitchR(0x73, ssr, "RAMWORKSR")
a.io.addSoftSwitchR(0x75, ssr, "RAMWORKSR")
a.io.addSoftSwitchR(0x77, ssr, "RAMWORKSR")
a.io.addSoftSwitchW(0x71, ssw, "RAMWORKSW")
a.io.addSoftSwitchW(0x73, ssw, "RAMWORKSW")
a.io.addSoftSwitchW(0x75, ssw, "RAMWORKSW")
a.io.addSoftSwitchW(0x77, ssw, "RAMWORKSW")
}