OSBYTE &6B
OSBYTE &6B (107) - External/Internal 1MHz Bus (on exit X is preserved)
Y=0 X=0 select external bus running at 2MHz X=1 select internal bus running at 1MHz This call allows the selection of either the external cartridge slot style of '1MHz' bus, or the internal 1MHz bus under the keyboard. In the case of the Master Compact X=1 has no effect as it has no connectors under the keyboard.
See Also
Jgharston 21:14, 26 May 2009 (UTC)