Xref: utzoo unix-pc.general:4715 comp.sys.att:8673
Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!ethos!att!cbnews!mvadh
From: mvadh@cbnews.ATT.COM (andrew.d.hay)
Newsgroups: unix-pc.general,comp.sys.att
Subject: Re: Upgrading Ports card to add memory
Keywords: memory upgrade
Message-ID: <13651@cbnews.ATT.COM>
Date: 1 Feb 90 12:16:07 GMT
References: <19876@ditka.UUCP>
Reply-To: mvadh@cbnews.ATT.COM (andrew.d.hay,54242,wi,1d007,508 374 5484)
Organization: AT&T Bell Laboratories
Lines: 19

In article <19876@ditka.UUCP> kls@ditka.UUCP (Karl Swartz) writes:
[]
"If your card has sockets for the memory chips and the associated
"control circuits all you have to do is populate the memory array
"and change a couple of jumpers.  Otherwise, you're out of luck --
"there are PALs and/or custom ICs in the control section that you
"won't be able to get.

not true!
we've converted several ports-only boards here (using a
ports-and-memory board as a guide), and there's nothing special in the
memory logic at all.  it's all standard ttl and discretes and a
resistor pack or two.

-- 
Andrew Hay		+------------------------------------------------------+
Ragged Individualist	|	 But I thought we were *ALL* iconoclasts!      |
AT&T-BL Ward Hill MA	|		I was just trying to fit in!!!	       |
a.d.hay@att.com		+------------------------------------------------------+