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Routines |
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Used by the routines at PrintScreenCharacter and GetKeypress.
Checks the keypress and rejects a key the game does not use.
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| ValidateKeypress | C240 | CP $61 | Return if it is below 61. | |
| C242 | RET C | |||
| C243 | CP $7B | Return if it is at least 7B. | ||
| C245 | RET NC | |||
| C246 | AND %01011111 | Convert the lower-case letter to upper case. | ||
| C248 | RET | Return. | ||
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