(address uint16)
| 56 | } |
| 57 | |
| 58 | func (m *Mapper1) Read(address uint16) byte { |
| 59 | switch { |
| 60 | case address < 0x2000: |
| 61 | bank := address / 0x1000 |
| 62 | offset := address % 0x1000 |
| 63 | return m.CHR[m.chrOffsets[bank]+int(offset)] |
| 64 | case address >= 0x8000: |
| 65 | address = address - 0x8000 |
| 66 | bank := address / 0x4000 |
| 67 | offset := address % 0x4000 |
| 68 | return m.PRG[m.prgOffsets[bank]+int(offset)] |
| 69 | case address >= 0x6000: |
| 70 | return m.SRAM[int(address)-0x6000] |
| 71 | default: |
| 72 | log.Fatalf("unhandled mapper1 read at address: 0x%04X", address) |
| 73 | } |
| 74 | return 0 |
| 75 | } |
| 76 | |
| 77 | func (m *Mapper1) Write(address uint16, value byte) { |
| 78 | switch { |
nothing calls this directly
no outgoing calls
no test coverage detected