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Routines |
| Prev: 02577 | Up: Map | Next: 02621 |
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The address of this routine is derived from an offset found in the control character table.
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| PO_BACK_1 | 02595 | INC C | Move leftwards by one column. | |||||||
| 02596 | LD A,34 | Accept the change unless up against the lefthand side. | ||||||||
| 02598 | CP C | |||||||||
| 02599 | JR NZ,PO_BACK_3 | |||||||||
| 02601 | BIT 1,(IY+1) | If dealing with the printer (bit 1 of FLAGS set) jump forward. | ||||||||
| 02605 | JR NZ,PO_BACK_2 | |||||||||
| 02607 | INC B | Go up one line. | ||||||||
| 02608 | LD C,2 | Set column value. | ||||||||
| 02610 | LD A,24 | Test against top line. Note: this ought to be 25. | ||||||||
| 02612 | CP B | |||||||||
| 02613 | JR NZ,PO_BACK_3 | Accept the change unless at the top of the screen. | ||||||||
| 02615 | DEC B | Unacceptable so down a line. | ||||||||
| PO_BACK_2 | 02616 | LD C,33 | Set to lefthand column. | |||||||
| PO_BACK_3 | 02618 | JP CL_SET | Make an indirect return via CL_SET and PO_STORE. | |||||||
| Prev: 02577 | Up: Map | Next: 02621 |