C64 ROM | Routines |
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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 |
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