Xref: utzoo comp.sys.att:7597 unix-pc.general:3743 Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!egrunix!nucleus!doc From: doc@nucleus.UUCP (Dave Mundhenk) Newsgroups: comp.sys.att,unix-pc.general Subject: Last Try to Resurrect Sick UNIXpc Keywords: foundation, diagnostics, disk, DMA, memory Message-ID: <5452@nucleus.UUCP> Date: 17 Sep 89 18:09:09 GMT Distribution: na Organization: The Nucleus Public Access Unix, Clarkston, MI Lines: 95 Well, I'm posting again regarding weird goings-on in my 7300. I may be wearing out my welcome here, but the way things are going I probably won't be a UNIXpc owner much longer, at least the owner of a "working, intact" UNIXpc. The machine is a P3..P5 512K motherboard. I have a 512K RAM expansion card in it. The motherboard has a daughterboard over the area where the battery is - others I've seen don't have this and I don't know the significance of it. I pulled the dead original battery and wired up a battery holder outside the case. Motherboard appears to have extensive field mods (know what 'vermicelli' is?). ;-) I run the hard disk off an external 150 Watt power supply. Disk is currently a CDC 94155-85. (Brand New). Had foundation set installed and running briefly when the root directory appeared to be trashed - /tmp was a very large FILE with 000 permissions, etc. Now trying to re-install the foundation set from either of 2 known good sets (3.5 and 3.51). Got some floppy-related errors so I've tried everything with another known good floppy drive also. Here are some of the errors encountered: In diagnostics, Test: Floppy disk Test Subtest: Random seeks with read sector Pass: 2 Error: FLOPPY: Error on Check - Read: Response = 8, start Block = 1. Test: Hard Disk Test (Drive 0) Subtest: Read all the disk Pass: 1 Error: WINCHESTER: Error on Check - Read: Response = 40, start Block = 31063. Test: Expansion memory test Subtest: Data bus test (Walking 1's) Pass: 1 Error: Memory error at Address 0: Wrote 80; Read back 0. ^ | This repeated for 2,4,6,8,A,C,E,10,12,14,16, etc. before I aborted and moved on... Here's what happens when I read in the Foundation Set: Floppy boot boots OK (sometimes must power on & off several times first). Prompts for Floppy File System Disk. Floppy FS disk reads, prompts "...want to continue? [Yes,No]" and I answer "y". It says "making file system on hard disk". OK. Then "copying loader onto hard disk". OK. Then "Copying System V files to hard disk" or something like that. After about 10 seconds, I get the message: #FDERR ST:40 TR:3 SR:1 DR:0 DMACNT:FF00 DCRREG:F7 MCRREG:CF00 #FDERR ST:40 TR:3 SR:1 DR:0 DMACNT:FF00 DCRREG:F7 MCRREG:CF00 #FDERR ST:40 TR:3 SR:1 DR:0 DMACNT:FF00 DCRREG:F7 MCRREG:CF00 ^ panic: dup mem alloc | | Please record the panic message. | Press hardware reset to reboot. | | [This came out as "CD00" several times also...] -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- I think this may be my final plea for help. I can't afford to put much money into this machine, and if it needs work on the motherboard I will probably have to sell the 70MB disk and use something smaller and slower |-( I got a variety of sugg{Ystions in response to previous postings. Most were "bad floppy drive", "bad WD1010", "RF interference". Augustine Cano mentioned that it might be the DMA chip, so it be worth a try to replace that [them?]. Did I mention that I also put in a new WD2010? Just out of curiousity I may put the WD1010 back in. What the hell. I'll try feeding it toast and coffee if it will help. If it is really sick I will part it out and stick with IBM compatibles and 3B's (or whatever else is handy that WORKS!). BTW, I have a DOS-73 board that I was hoping to install in this machine if I got it working. If this is curtains, anyone want to make me an offer on that or any other parts? -sigh- I like this machine, please help me resurrect it! Dave Mundhenk =-=-=-=-=-=-= 201-580-4943 Please reply to: ...!att!lc15a!doc -- Dave Mundhenk =-=-=-=-=-=-= 201-580-4943 Please reply to: ...!att!lc15a!doc