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Raven
April 5th, 2010, 09:15 AM
I have a Zenith Z-140 which I diagnosed as having some RAM trouble. It has soldered-on RAM so I decided I couldn't do anything about it and stuck it in the corner. After a few more years of toying with old machines (that was my first 808x system) I've decided that I should be able to diagnose it more accurately if I had some software to do so with. I had diagnosed it by noticing that some stuff didn't work right, and if I ran a PC booter game (Pirates, to be specific) it stopped loading and froze whenever the title image filled the screen about 2/3 through, leading me to think there must be a corruption or hole in the RAM someplace.

Anywho if anyone knows a tool I can use to diagnose this it would be appreciated.

Jorg
April 5th, 2010, 09:28 AM
There must be better ones but Checkit had it I believe

Raven
April 5th, 2010, 10:49 AM
Anybody have that for me somewhere archived? :P

Jorg
April 5th, 2010, 11:30 AM
you got pm

Lord Moz
April 5th, 2010, 12:43 PM
Norton Diags runs though ram tests as well. Tries 1s, 0s, walking patterns, etc. I can't say I've ever actually had any bad ram on a PC, or at least ever diaganosed any, but I've run the tests a few times on various machines.

You can search for dos "burn-in" testers as well, as they are likely to have ram tests.

Good luck.
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Trevor

Ole Juul
April 5th, 2010, 01:04 PM
Amidiag does partity test, pattern test, walking 1's, walking 0's, address test, refresh test, and more. It's proprietary but does a lot of stuff.

barythrin
April 5th, 2010, 01:30 PM
Stupid question but the Z-140 doesn't have a built-in diag does it? The Z-15(0/1?) does if you do ctrl+alt+insert and for me had a great memory testing app where it told me which chip it would be with the u-schematic number. Pretty nifty though I know that's a newer model than yours.

Raven
April 5th, 2010, 05:25 PM
It has some tools, but I don't believe there's a RAM tester. I can view registers, dump memory, spam the screen with colors, and a few other neat things, but I don't remember how to open that menu any longer - I'd need to check the manual (yes I have a manual xD).

FYI Jorg, Checkit won't fit on a 360K disk, even tho it's 349K ("352 on disk")...

Hoho... you're right barythrin, it does have a memory test in there.

Ole Juul
April 5th, 2010, 06:45 PM
Checkit won't fit on a 360K disk, even tho it's 349K ("352 on disk")...
Too bad. Checkit seems like it's a good one here. Perhaps you could temporarily stick in a 720K drive.

Lord Moz
April 5th, 2010, 07:44 PM
FYI Jorg, Checkit won't fit on a 360K disk, even tho it's 349K ("352 on disk")...


Too bad. Checkit seems like it's a good one here. Perhaps you could temporarily stick in a 720K drive.

In times like that, pkLite might be of some use, in exchange for slightly slower load time. When trying to fit my diags on various size media, I've found executable compressors very handy many times, on all kinds of platforms.
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Trevor

Raven
April 5th, 2010, 07:59 PM
Too bad. Checkit seems like it's a good one here. Perhaps you could temporarily stick in a 720K drive.

Nothing but 360K 5.25" floppies work in the Zenith Z-140, as far as I've tried. I may be able to get a backpack drive running, if they like the Zenith more then they liked the Sr. Partner yesterday.

Marrr
April 5th, 2010, 11:11 PM
Checkit won't fit on a 360K disk, even tho it's 349K ("352 on disk")...
I used Checkit 3.0 from a 360KB floppy many times, the trick is:
- put checkit.exe onto first diskette
- put everything else necessary (checkit.cnf, checkit.hlp, checkit.ovl) onto second diskette
Then it simply prompts when disk change is necessary...

Raven
April 6th, 2010, 06:27 PM
This is an empty disk I'm talking about here, just the exe. Maybe it's saving unformat information and that's where I went wrong - I'll try it again in a day or two.

mikey99
July 6th, 2012, 03:53 PM
Sorry to resurrect an ancient thread, but I discovered more info on running CHECKIT on a 5.25 system.

If you have two 5.25 drives, place the diskette with checkit.exe and checkit.cnf in drive B:
Place the diskette with the other files, checkit.hlp, checkit.ovl, checkit.cnf in drive A:

From the DOS prompt Switch to B:
run 'checkit.exe'
no more prompts to switch diskettes...... it now reads the ovl file from A: