On 24 Jun 98 at 18:48, Mark Rode wrote:

> I am thinking about upgrading an old 486DX33 with 30 pin simms. I have no
> manual or identification for the board.
>
> I have a Intel 486DX2 66 that I am thinking of putting in it. I know the 33
> and 66 run at the same clock speed so any DX33 should be able to run a 66
> without any changes....right? This has a CPU board that isn't a Ziff
> socket....I haven't replaced one of these yet......how much or a pain are
> these to upgrade? Do you just manually pull them out and push them in....or
> is there a trick to it?

  The "OverDrive" version of the chip comes with a rake-like tool to
fit between the CPU's pins and lever it out of such a socket.  [Apply
it gently to each side in turn if you want the old CPU to still be
usable....]  You should be able to get a similar effect with a small
flat screwdriver or other tool.

> The 30 pin memory array is the usual 8 slots.....at present there is 1 meg
> in each slot. Do all 30 pin setups allow for mixing the groups of
> four.....can I leave 4 megs in and replace 4 with 4 meg 30 pin simms or do
> some 30 pin boards require particular memory configurations.

  Your memory is correct:  Independent groups of four.  Some
motherboards may support 30-pin SIMMs larger than 4MB, but without
the manual I wouldn't risk it.

David G