Created
September 13, 2022 01:05
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Simplified KIM-1 Keypress
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| ;140000D8A90085F985FA85FB201F1F206A1F85F94C090208EE | |
| ;0000010001 |
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| ; (2022) Kaveen Rodrigo / ukr.lk | |
| ; Reference To ROM Routines In The KIM-1 | |
| SCANDS = $1f1f | |
| GETKEY = $1f6a | |
| ; Reference to SCANDS values | |
| dig12 = $f9 | |
| dig34 = $fa | |
| dig56 = $fb | |
| ; Start program at free RAM. | |
| .org $0200 | |
| init: | |
| cld ; Clear Decimal | |
| lda #$00 ; Initialize SCANDS Values | |
| sta dig12 | |
| sta dig34 | |
| sta dig56 | |
| main_loop: | |
| jsr SCANDS | |
| jsr GETKEY | |
| cmp #$15 ; Handle no key press | |
| beq main_loop | |
| sta dig12 ; Store valid key press | |
| jmp main_loop |
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