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- _acia_scan: lda ACIA_STATUS ;nacte status ACIA
- and #ACIA_STATUS_RX_FULL ;porovna status s RX_full bitem
- beq @end ;pokud je vysledek 0 skoci na @end, pokud ne tak pokracuje
- lda ACIA_DATA ;nacte do A data z ACIA
- RTS ;vyskočí z podprogramu
- @end: LDA #00 ;načte 0 do A
- RTS ;vyskočí z podprogramu
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