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1 | getkey: | |
2 | - | ;;Returns L,B,A=0, z flag set if no key is pressed |
2 | + | ;;Returns A=scan code, or A=0 and z flag set if no key is pressed |
3 | - | ;;22cc+60G+24R |
3 | + | ld bc,$BF01 |
4 | - | ;;R is on [1,8] |
4 | + | ld a,$40 |
5 | - | ;;G is on [1,7] |
5 | + | |
6 | - | ;;avg: 370cc |
6 | + | sub $8 |
7 | - | ;;24 bytes |
7 | + | ret z |
8 | - | ld bc,$FE01 |
8 | + | |
9 | - | xor a |
9 | + | sra b |
10 | in h,(c) | |
11 | jp pe,loop | |
12 | - | add a,$20 |
12 | + | loop2: |
13 | - | sla b |
13 | + | add hl,hl |
14 | ret nc | |
15 | - | in l,(c) |
15 | + | dec a |
16 | - | inc l |
16 | + | jr loop2 |