Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!ucbvax!agate!darkstar!usenet
From: usenet@darkstar.ucsc.edu (Usenet News Account)
Newsgroups: comp.sys.zenith
Subject: Z-159 EMS Upgrades R FUN!
Summary: Your PAL or mine?
Keywords: PAL
Message-ID: <1391@darkstar.ucsc.edu>
Date: 21 Feb 90 01:54:31 GMT
References: <22275.25dc6dd8@kuhub.cc.ukans.edu>
Reply-To: banshee@ucscf.UCSC.EDU.UUCP (Wailin' Through The Nets)
Distribution: na
Organization: University of California, Santa Cruz  CATS
Lines: 33


	I have been attempting to add EMS memory to my Z-159.  Silly me,
	I thought you could just add memory and flip a few switches.
	Here is actually what you need to do:

	From kent@uflorida (thanks!) there are missing chips on the old
	Z-159 memory boards (always wondered what was supposed to go there)
	and you need to add then in addition to the DRAM and flip the dips.

	Parts: U432,433 - 74LS670
	       U435     - 74LS244
	       U451     - 74ALS74
	       U455     - PAL ZDS P/N 444-499

	All but the last chip are easily available from Frys (or your local
	DRAM and Nacho Chip shop).  I talked to a zenith salesperson about
	EMS, he only could tell me what was on the sheet in front of him:
	a $113 memory board with the chips installed.  So I called Zenith in
	San Jose and asked about buying the chip.  After being on hold for
	several minutes, the rep told me that I could get a full chip upgrade
	(with 256K!!!) for the low price of $199.  No I insisted, I ONLY want
	the PAL.  "Are we installing it?"  No, I'll do it myself.  The PAL
	alone was $10.50, but there is a $100 Core charge if you don't give
	Zenith back your old PAL, BUT I NEVER GOT ONE IN THE FIRST PLACE.
	"Hmm, guess we're back to square one."  Yeah, ok, thanks...

	My next gambit is to find a repair center and connive them into
	selling me the chip.  Otherwise, could someone post the PAL source
	so I can burn one in myself (:-) 

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	John M Vinopal	banshee@ucscf.UCSC.EDU	ucbvax!ucscc!ucscf!banshee