(address uint16)
| 80 | } |
| 81 | |
| 82 | func (m *Mapper4) Read(address uint16) byte { |
| 83 | switch { |
| 84 | case address < 0x2000: |
| 85 | bank := address / 0x0400 |
| 86 | offset := address % 0x0400 |
| 87 | return m.CHR[m.chrOffsets[bank]+int(offset)] |
| 88 | case address >= 0x8000: |
| 89 | address = address - 0x8000 |
| 90 | bank := address / 0x2000 |
| 91 | offset := address % 0x2000 |
| 92 | return m.PRG[m.prgOffsets[bank]+int(offset)] |
| 93 | case address >= 0x6000: |
| 94 | return m.SRAM[int(address)-0x6000] |
| 95 | default: |
| 96 | log.Fatalf("unhandled mapper4 read at address: 0x%04X", address) |
| 97 | } |
| 98 | return 0 |
| 99 | } |
| 100 | |
| 101 | func (m *Mapper4) Write(address uint16, value byte) { |
| 102 | switch { |
nothing calls this directly
no outgoing calls
no test coverage detected