| C64 ROM | Routines |
| Prev: EDB9 | Up: Map | Next: EDC7 |
| EDBE | AD 00 DD | LDA $DD00 | read VIA 2 DRA, serial port and video address | |
| EDC1 | 29 F7 | AND #%11110111 | mask xxxx 0xxx, set serial ATN high | |
| EDC3 | 8D 00 DD | STA $DD00 | save VIA 2 DRA, serial port and video address | |
| EDC6 | 60 | RTS | ||
| Prev: EDB9 | Up: Map | Next: EDC7 |