Bruce_Peltzer@mindlink.bc.ca (Bruce Peltzer) (05/07/91)
I have a TRS-80 Model 16B with a Model 6000 CPU board (8MHz) and a 1 meg ram
card. I have an additional 1 meg RAM card which I would like to add (if
possible). I am running Xenix 3.2 (I finally found an upgrade). What I am
interested in is: would changing the dip switch settings on the RAM card allow
me to add the memory? The ram cards are also from a 6000. BTW, I don't want to
use the extra meg as a swap device. I would like to use it as main memory.
-bp-.
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uucp: a567@mindlink.UUCP GEnie: b.peltzer2
----------------------------------------------------------------nanook@eskimo.celestial.com (Robert Dinse) (05/11/91)
In article <5766@mindlink.bc.ca>, Bruce_Peltzer@mindlink.bc.ca (Bruce Peltzer) writes: > I have a TRS-80 Model 16B with a Model 6000 CPU board (8MHz) and a 1 meg ram > card. I have an additional 1 meg RAM card which I would like to add (if > possible). I am running Xenix 3.2 (I finally found an upgrade). What I am > interested in is: would changing the dip switch settings on the RAM card allow > me to add the memory? The ram cards are also from a 6000. BTW, I don't want to > use the extra meg as a swap device. I would like to use it as main memory. In order to do this you need an MMU upgrade. Stock the MMU can only address 1 megabyte of memory. Last time I got a price quote from Tandy it was around $300 if memory serves. I've got a couple of CPU boards with a custom MMU (that doesn't have a PAL chip - courtesy of design work done by Monty Schmidt) that works ok with 2-megs but not more than that. I am speculating that it's a fan-out problem.