Quote:
Originally Posted by Timbucus
Yes it could well be as the monitor relies on the ability to wrap around as it uses the -Ve offset from 000 to get at the register values etc stored at the very top of RAM in the FF0 region...
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From 0000 it should wrap around to 0FF0 region, but that shouldn’t make a difference as the MK14 memory from X800-XFFF is mirrored in every page. Only X000-X7FF is a different 2K block of RAM in every page.
I might try connecting reset of the 74LS395 to ground instead of pulled up to see if that confirms the reason for the starting at 0001 CF is due to addressing in the monitor.