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- Path: sparky!uunet!bcstec!bcsaic!sundry!sdc!tecslm1
- From: tecslm1@sdc.boeing.com (Shamus McBride)
- Newsgroups: comp.sys.zenith
- Subject: Zenith 386/16 memory board question
- Message-ID: <6373@oval.BOEING.COM>
- Date: 11 Aug 92 21:39:27 GMT
- Distribution: na
- Organization: Boeing Computer Services (ESP), Seattle, WA
- Lines: 29
-
- While running Turbo C++ my machine kept getting a memory parity error.
- Memory diagnostics didn't find the error. I set a trap on the NMI
- interrupt handler entry, then when the error occured again I checked
- ports F4H, F5H, F6H, and F7H for errors (technical manual 15-14). F7
- showed 11110111 which implies an error in Bank 3 of the 4th card (of 4
- 1Meg cards).
-
- So my question is how are the banks laid out on the
- 386/16 memory card?
-
- +----------------------------------------+
- | [][][][][][][][][] [][][][][][][][][] |
- | |
- | [][][][][][][][][] [][][][][][][][][] |
- | |
- | +----------++
- +-IIIIIIIIIIIIII-IIIIIIIIIII-+
-
- Drawn from memory. 4 banks, TL, TR, BL, BR.
-
-
- Any suggestions on how to better isolate the offending chip.
- I usually start swapping chips around, but it often takes
- 2 to 3 hours to find the bad(?) chip ;-(
-
- --
- Shamus Mc Bride | tecslm1@sdc.boeing.com
- Boeing Computer Services | tecslm1%sdc@atc.boeing.com
- (206) 865-5047 | uw-beaver!bcsaic!sdc!tecslm1
-