On Thu, 29 Nov 2001, Mark Knibbs wrote:
Hi,
This is quite urgent.
Can someone who has the earlier version of the Central Point Option Board
(also known as Copy II PC Option Board) please type up the part numbers of
all chips on the card? Or scan the card at a decent resolution so all chip
markings are legible.
One assumes that you are referring to the Copyright 1986 units which
lack the 64-pin proprietary chip as contrasted with the Copyright 1987
units which contained it.
Okay, starting at top-left hand and reading horizontally, they are as
follow:
HD74LS112P HD74LS11P HD74LS153P DM74LS163AN
SN74SO4N SN74LS393N SN74LS174 SN74LS163AN
SN74LS174N HD74LS86P HD74LS163P
SN7433N SN74LS174N HD74LS273P
HD74LS14P HD74LS367AP HD74LS194AP HD74LS374P
SN74LS133N HD74LS32P HD74LS194AP HD74LS374P
Have fun!
- don
I want to get datasheets for as many of the ICs on the
card as possible.
Assuming some are not just simple TTL chips, the best place to look for these
would be the FreeTradeZone web site. As mentioned a few days ago, that will no
longer be accessible for free in a few days time.
(I don't have an older Option Board yet. I want to get info on the ICs it uses
for a possible future reverse-engineering effort, to figure out how the card
works, and allow low-level disk-imaging software to be written.)
-- Mark