On 04/01/2010 19:46, Ethan Dicks wrote:
On Mon, Jan 4, 2010 at 2:36 PM, Mr Ian Primus
<ian_primus at yahoo.com> wrote:
Or the early Commodore PET computers with holes
drilled through the pads
for additional RAM chips. Of course, once again, nothing really stopping a
determined hardware hacker from bridging wires to the severed traces...
I have one of those - I wouldn't call them early - it was the "dynamic
PET" model that could take one or two rows of 4Kx1 or 16Kx1 DRAMs, so
long after the SRAM PETs (which I _would_ call early). If you bought
the 16K version, they sent you a board with a bunch of ~6mm holes
between the unused RAM spots.
Yup, the first two or three 3016's our college bought were fine, so we bought
ten (IIRC) more, and those ones came with added holes -- more like 3/8, from
memory. I used quite a lot of wire-wrap wire on those.
I wonder how many people tried to return these machines but were turned
down with "Gee, we can't take these back. Someone drilled holes in the
motherboard!".
--
David Griffith
dgriffi at
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