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- Xref: sparky comp.sys.ibm.pc.hardware:36947 comp.sys.ibm.pc.misc:17035
- Newsgroups: comp.sys.ibm.pc.hardware,comp.sys.ibm.pc.misc
- Path: sparky!uunet!gatech!news.ans.net!cmcl2!panix!bergman
- From: bergman@panix.com (Mark Bergman)
- Subject: Re: What good are Bios RAM tests ?
- Message-ID: <C1BsHF.JwF@panix.com>
- Organization: Panix Public Access Internet & Unix, NYC
- References: <1jagkpINNarn@mudos.ann-arbor.mi.us> <1993Jan21.112136.2125@dmu.ac.uk> <C18uoH.7GA@undergrad.math.waterloo.edu>
- Date: Sat, 23 Jan 1993 21:17:38 GMT
- Lines: 61
-
- In article <C18uoH.7GA@undergrad.math.waterloo.edu> ychung@cayley.uwaterloo.ca (Young Chung) writes:
- >In article <1993Jan21.112136.2125@dmu.ac.uk> cph@dmu.ac.uk (Chris Hand) writes:
- >>
- >>People have been talking about the BIOS making a difference to the refresh,
- >>but I would have thought it's the CHIPSET we should be looking at? After
- >>all that's what controls the refresh, caching etc.
- >>
- >Well, I don't have the manuals with me to give any specifics about my
- >machine, but I think the 3-chip parity problem is caused by the BIOS
- >incompatibility.
- >
- >This is what happened to me.
- >
- >I had 4Meg of 9-chip simms and bought 4 more 3-chip simms. I installed it
- >with ease and boot up. The computer would tick for 4Megs then hangup.
- >CMOS chipset error! So, I turned off the above 1 meg memory check off and
- >no problem. I then proceded to windows and decided to use all 8megs of
- >memory. So I open up a BIG TGA file. Parity error in the middle of loading.
- >So I put the 3-chip simms on the first bank (making them the first 4 megs).
- >Now, CMOS error occurs as soon as it starts memory test. So I turn parity
- >check off in my BIOS setup. Now, it runs with no problem. Windows gave me
- >no trouble. Of course, when I installed OS/2 2.0, I stated getting that
- >parity error again.
- >But, my point is that since I was able to fix the problem, at least temporarily,
- >I believe that it's the BIOS that causes 3-chip simm incompatibility.
- >
- >AMI Feb/91 (I think).
- >
- >
- >----------
- >Young :-) ychung@napier.uwaterloo.ca 3@#j3kdi$#%98sk30dskf@#sd.as..3k/sdf3lkdf
- > ......##,3@!!!,#@##?P}{ -- I'm a .signature Virus!! --.
- >
- >
-
- Well, I've got 4MB of 3 chip simms, and 4MB of 9 chip.
- Haven't had a problem from day 1.
-
- Environment:
- Clone Motherboard
- ETEQ Chipset
- AMI Hi-Flex Bios dated 5/5/91
-
- Relevant settings:
- Concurrent Refresh: Disabled
- Page Interleave: Enabled
- DRAM Write wait state: 2W/S
- DRAM Read wait state: 3W/S
- RAS* Timeout mode counter: Disabled
- Page mode: Enabled
- Post write control: Disabled
- CAS Pulse width: 3 CLK2
- RAS Precharge time: 6 CLK2
- RAS to CAS delay: 2 SYSCLK
-
- ----
- Mark Bergman (Biker, Stagehand, (former) Unix user support grunt)
- 718-855-9148
-
- bergman@panix.com
- {cmcl2,uunet}!panix!bergman
-