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Routines |
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Used by the routine at DrawingSetup.
Moves the screen address down one character row, and undoes that step if it would leave the screen.
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| Drawing_StepDownOneRow | 8106 | PUSH AF | Step down one attribute row and jump to 8113 if the screen address is not 5A. | |
| 8107 | PUSH DE | |||
| 8108 | LD DE,$0020 | |||
| 810B | ADD HL,DE | |||
| 810C | LD A,H | |||
| 810D | CP $5A | |||
| 810F | JR NZ,$8113 | |||
| 8111 | AND A | Clear the carry flag. | ||
| 8112 | SBC HL,DE | Undo the step. | ||
| 8114 | POP DE | Restore DE and AF from the stack. | ||
| 8115 | POP AF | |||
| 8116 | RET | Return. | ||
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View the equivalent code in;
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