120garage wrote on 2024-09-03, 14:28:

PC Hoarder Patrol wrote on 2024-09-03, 02:18:

Same source as above, these are the part nos. Zenith listed... […]
Show full quote

bellarmine wrote on 2024-09-03, 01:40:

Hi 120, thanks for the excellent photos, they're perfect! Nice looking machine, looks like you managed to get one that hasn't a […]
Show full quote

Hi 120, thanks for the excellent photos, they're perfect! Nice looking machine, looks like you managed to get one that hasn't all yellowed yet.

You're right those are completely non-standard connectors, what a pain. I'm sorry to say I couldn't find anything either. The KTZ-NT486 number returns a number of 4MB modules, but that's it. I can't find any 8MB modules.

What BIOS version is it running? Just wondering unless it's actually V 4.3, if it is actually possible that the 8MB modules never got manufactured..... Them being such an odd-ball connector, and then Zenith switching to industry-standard SO-DIMMs very soon thereafter.

Sorry to not have any better news, as far as I can tell, and I really like to beat things to death finding out, but unless you can find a laptop for sale showing it has more than 16MB installed memory (4x 4MB), I don't know if bigger that 4MB actually exist. FWIW 16MB on a 486 is actually quite good, adequate for w95 and excellent for w311.

Do let me know anytime if there's anything I missed or can help you with, cheers!~

Bellarmine

Same source as above, these are the part nos. Zenith listed...

Z239-1029-00 ME-4200-01 4MB Memory Expansion 3.3v
Z239-1030-00 ME-4200-02 8MB Memory Expansion 3.3v

Also, Kingston had a datasheet covering both their equivalent 4 & 8MB parts

The attachment KTZNT486.PDF is no longer available

PC Hoarder Patrol, thank you!
Oh my god, where did you find this pdf document??? I searched for a long time, but I couldn't even find this.

You're welcome.

It's one of a series of installation guides for Zenith hardware on the Kingston archive... https://web.archive.org/web/19970107091519id_ … tall/ZENITH.HTM

The full OEM guide index is here...https://web.archive.org/web/19970107033832id_ … ll/pdfindex.htm