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Routines |
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Used by the routine at READ_CONTROLS.
The branch READ_CONTROLS takes when the cursor option was chosen. The cursor keys are not adjacent in the matrix the way Q, W, E, R and T are, so this reads a different half-row and assembles the same five bits by hand rather than swapping two of them.
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| READ_CURSOR_KEYS | 9398 | LD A,$EF | ||
| 939A | OUT ($FD),A | |||
| 939C | IN A,($FE) | |||
| 939E | LD C,A | |||
| 939F | AND $08 | |||
| 93A1 | LD E,A | |||
| 93A2 | LD A,C | |||
| 93A3 | RRCA | |||
| 93A4 | RRCA | |||
| 93A5 | AND $45 | |||
| 93A7 | OR E | |||
| 93A8 | LD E,A | |||
| 93A9 | RRCA | |||
| 93AA | RRCA | |||
| 93AB | AND $10 | |||
| 93AD | OR E | |||
| 93AE | AND $1F | |||
| 93B0 | LD E,A | |||
| 93B1 | LD A,$F7 | |||
| 93B3 | OUT ($FD),A | |||
| 93B5 | IN A,($FE) | |||
| 93B7 | RRA | |||
| 93B8 | RRA | |||
| 93B9 | RRA | |||
| 93BA | AND $02 | |||
| 93BC | OR E | |||
| 93BD | RET | |||
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