usenet@darkstar.ucsc.edu (Usenet News Account) (02/21/90)
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 (:-) ------- John M Vinopal banshee@ucscf.UCSC.EDU ucbvax!ucscc!ucscf!banshee
easton@zds-oem.UUCP (Jeff Easton) (02/24/90)
In article <1391@darkstar.ucsc.edu>, usenet@darkstar.ucsc.edu (Usenet News Account) writes: > > 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: > > > 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 (:-) > Call Heath parts replacement at 616-982-3571, give them the part number. They will be happy to sell you just the PAL. > John M Vinopal banshee@ucscf.UCSC.EDU ucbvax!ucscc!ucscf!banshee Jeff Easton Zenith Data Systems Systems Engineer OEM Engineering easton@andrews.edu --or-- easton@zds-oem.zds.com I'd rather be Water Skiing...