Re: 16 MB REU clone

From: john/lori (
Date: 2001-08-27 17:33:36

> Two accesses within the upper half of PHI2 is impossible as you cannot
> control RAS and CAS of the onboard DRAMs.

But the line to the DRAMs, /CASRAM, is generated by the PLA,
so it might be possible twiddle /GAME and/or /EXROM (or
something) and cause another /CASRAM for a second access
in page mode.

There was some good reason why this wouldn't work, but it escapes
me at the moment.


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