izapple2/apple2/rxmPage.go

43 lines
725 B
Go

package apple2
type rxmPage struct {
data [256]uint8
observer func(address uint8, isWrite bool)
}
type ramPage struct {
rxmPage
}
type romPage struct {
rxmPage
}
func (p *rxmPage) Peek(address uint8) uint8 {
p.touch(address, false)
return p.data[address]
}
func (p *rxmPage) internalPeek(address uint8) uint8 {
return p.data[address]
}
func (p *rxmPage) Poke(address uint8, value uint8) {
p.touch(address, true)
p.data[address] = value
}
func (p *rxmPage) touch(address uint8, isWrite bool) {
if p.observer != nil {
p.observer(address, isWrite)
}
}
func (p *romPage) Poke(address uint8, value uint8) {
// Do nothing
}
func (p *romPage) burn(address uint8, value uint8) {
p.data[address] = value
}