func NewOAM() *OAM {
return &OAM{
BasicMemory: m65go2.NewBasicMemory(256),
Buffer: m65go2.NewBasicMemory(32),
readCycle: fetchAddress,
writeCycle: failCopyYPosition,
}
}
func NewRP2A03() *RP2A03 {
mem := NewMappedMemory(m65go2.NewBasicMemory(m65go2.DEFAULT_MEMORY_SIZE))
mirrors := make(map[uint16]uint16)
// Mirrored 2KB internal RAM
for i := uint16(0x0800); i <= 0x1fff; i++ {
mirrors[i] = i % 0x0800
}
// Mirrored PPU registers
for i := uint16(0x2008); i <= 0x3fff; i++ {
mirrors[i] = 0x2000 + (i & 0x0007)
}
mem.AddMirrors(mirrors)
cpu := m65go2.NewM6502(mem)
cpu.DisableDecimalMode()
apu := NewAPU()
// APU memory maps
mem.AddMappings(apu, CPU)
dma := NewDMA(mem)
// DMA memory maps
mem.AddMappings(dma, CPU)
return &RP2A03{
Memory: mem,
M6502: cpu,
APU: apu,
dma: dma,
}
}
func NewRP2C02(interrupt func(bool)) *RP2C02 {
mem := rp2ago3.NewMappedMemory(m65go2.NewBasicMemory(m65go2.DEFAULT_MEMORY_SIZE))
mirrors := make(map[uint16]uint16)
// Mirrored nametables
for i := uint16(0x3000); i <= 0x3eff; i++ {
mirrors[i] = i - 0x1000
}
// Mirrored palette
for _, i := range []uint16{0x3f10, 0x3f14, 0x3f18, 0x3f1c} {
mirrors[i] = i - 0x0010
}
for i := uint16(0x3f20); i <= 0x3fff; i++ {
mirrors[i] = i - 0x0020
}
mem.AddMirrors(mirrors)
return &RP2C02{
Output: make(chan []uint8),
Memory: mem,
Interrupt: interrupt,
oam: NewOAM(),
Cycles: make(chan uint16),
}
}
