Central Point Option Board (earlier non-ASIC version) chips

From: Don Maslin <donm_at_cts.com>
Date: Fri Nov 30 23:07:50 2001

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
>
>
Received on Fri Nov 30 2001 - 23:07:50 GMT