OSBYTE &7A
OSBYTE &7A (122) - Keyboard Scan from &10
Simply performs OSByte &79 with X=16
Usage note
On exit Y is undefined, and typically contains an invalid keynumber.[1] Paged ROMs that handle service call &03 commonly, though incorrectly, pass Y unchanged to OSBYTE &78 where it sets an arbitrary keynumber as the second active rollover key. This does not cause a spurious keypress in practice.
See Also
References
- ↑ Stardot forum post by Tom Seddon, 11th December 2024.
Jgharston 21:17, 26 May 2009 (UTC)
