Integral RAM upgrade
ard at p850ug1.demon.co.uk
Fri Feb 29 17:40:46 CST 2008
> On 28 Feb 2008 at 19:51, Tony Duell wrote:
> > Anyway, the RAM board was clearly identical to the 1M board, just with
> > only have the RAM chips fitted and the links set differently. Having got
> > a lot of 41256 chips on old PC memory boards, I spent the afternoon
> > upgrading it to 1M.
> Sounds very similar to what was often done to the first-round 5150s
> to get the planar memory increased from 64K to 256K.
Not really. In the case of the Integral, the 512K oartd has 16 RAM chips
and 16 empty spaces. I had to add the extra RAMs, but not remove
I would have thought the 5150 upgrade involved removing the existing RAMs
nad rpelacing them with larger-capacity chips, more like what I did to
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