| C64 ROM | Routines |
| Prev: E4B7 | Up: Map | Next: E4DA |
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Used by the routine at EF90.
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| E4D3 | 85 A9 | STA $A9 | save the start bit check flag, set start bit received | |
| E4D5 | A9 01 | LDA #$01 | set the initial parity state | |
| E4D7 | 85 AB | STA $AB | save the receiver parity bit | |
| E4D9 | 60 | RTS | ||
| Prev: E4B7 | Up: Map | Next: E4DA |