With a new internal RAM upgrade for the MC-10 having been announced, users of the MCX128 who install this upgrade would need new logic programmed into the GAL chip if they want the added internal RAM to be available for the video display.
Without updating the logic, you can still use the MCX128 on a computer with an internal RAM upgrade but the two highest resolution graphics modes (CG6 and RG6) will remain unable to make use of the bottom third of the screen.
Previously, a special version of the GAL logic had been made available for computers with the 8K internal RAM modification. However, this logic prevented proper use of the MCX128 on an unmodified MC-10.
For those with the ability to re-program the GAL chip, a new universal version of the logic is now available that allows the MCX128 to work properly on computers with or without an internal RAM upgrade.
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