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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!usenet.ins.cwru.edu!agate!stanford.edu!leland.Stanford.EDU!thorn
- From: thorn@leland.Stanford.EDU (Shannon Lee Thornburg)
- Subject: IIsi at 25MHz Failure Info
- Message-ID: <1992Nov19.164503.5972@leland.Stanford.EDU>
- Sender: news@leland.Stanford.EDU (Mr News)
- Organization: DSG, Stanford University, CA 94305, USA
- References: <1992Nov18.025437.39462@fourd.com> <BxyuHv.Fy0@world.std.com>
- Date: Thu, 19 Nov 92 16:45:03 GMT
- Lines: 22
-
- Hi again. I posted several weeks ago to report that my IIsi upgrade to 25MHz
- did NOT work. I now have more info on it.
-
- It seems that only my Apple NuBus Adapter Card has problems with the faster
- clock speed. If I remove the NuBus adapter (and don't try to run any After
- Dark modules that require and FPU!), everything works just great. When the
- card is installed I'm lucky to get a boot.
-
- I've added a heat sink to my '030 and that didn't change anything.
-
- So, until I can afford a third-party cache/FPU card that can handle 25MHz, I'll
- be running without the FPU. When I run Matlab I just put the 40MHz oscillator
- and and NuBus adapter back in.
-
- One reader said he had success with a 48MHz oscillator. If I can get ahold of
- one I'll try that.
-
- All this just emphasises the point that the upgrade may not work for everyone.
- But the risk is well worth it.
-
- -- Shannon Thornburg
-
-