Partially-bad chips; was: repairing early HP calcs
cclist at sydex.com
Mon Dec 19 20:27:21 CST 2005
On 12/19/2005 at 9:03 PM Allison wrote:
>Polypaks was the place here. No bargan as usually a package with one bad
>gate developed other problems over time.
I really had to wonder about some of the Poly Paks stuff--you could get
IC's with untinned/unplated leads or other very substantial cosmetic
defects. Still, I certainly bought a pile of RTL from them--all flat-pack.
>That was normal. It had extra tracks for that reason. I must have 8
>of the BMs and two working BPK72 boards. There was no such thing as
>a flawless BM apparently.
Still have an unused BPK72A-4 in its original box (S/N 948). Sales guy
gave it to me--I didn't ask for it, could never rationalize using it
for--what, 128K of rather slow power-hungry memory. I think Intel grew
desperate at some point to find a market for it.
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