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Routines |
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Used by the routine at YouSeeStart.
Waits until a key is pressed, then sets the border to white.
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This is the same key wait as Normal_AnyKey, but it sets the border to white before returning.
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| Turn_WaitForAKey | 38554 | XOR A | Read from the keyboard port. | |
| 38555 | IN A,(254) | |||
| 38557 | AND %00011111 | Keep bits 0-4, one for each key in the half-row. XOR A then IN A,(254) reads every half-row at once, and a pressed key reads as a reset bit. | ||
| 38559 | CP 31 | Loop back to Turn_WaitForAKey until any key has been pressed. | ||
| 38561 | JR Z,Turn_WaitForAKey | |||
| 38563 | LD A,7 | Set the border to white. | ||
| 38565 | OUT (254),A | |||
| 38567 | RET | Return. | ||
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