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- From: jimmys@bonnie.ics.uci.edu (Jimmy Shaw)
- Subject: Re: Accelerator performance
- Nntp-Posting-Host: bonnie.ics.uci.edu
- Message-ID: <2AB28CD0.27301@ics.uci.edu>
- Newsgroups: comp.sys.apple2
- Reply-To: jimmys@ics.uci.edu (Jimmy Shaw)
- Organization: Univ. of Calif., Irvine, Info. & Computer Sci. Dept.
- Lines: 50
- Date: 13 Sep 92 00:35:28 GMT
- References: <9209121442.AA27789@apple.com> <1992Sep12.230154.15547@news.iastate.edu>
-
- In article <1992Sep12.230154.15547@news.iastate.edu> hal@budapest.math.macalstr.edu (Harold Byron Bouma) writes:
- >"ERIC S FORD" writes
- >> I recently spoke with Quality Computers re: ZipGS performance and cost.
- >> They now only carry the 8MHz board. Their reason is that the 9MHz board
- >> still uses the 8MHz processor but incorporates a new crystal to allow
- >> pushing that processor to 9MHz -- they expect a resultant decrease in
- >> reliability. Anyone out there care to comment? I'm on the verge of
- >> plunking down the bucks for an accelerator and would appreciate any and all
- >> advice/reviews of performance, reliability, and limitations.
- >>
- >> Eric S. Ford
- >>
- >
- > Well, up until the 14Mhz 65816 came out, all Zips above the speed of
- >8 Mhz were 8 Mhz chips pushed to go faster. Todd Whitesel (sic) had written
-
- Looking at my 8 Mhz ZipGSX, it's a 7 Mhz 65816, but pushed to do 8.2 Mhz.
-
- >to Zip a while ago upset that his 10 Mhz chip had become damaged from the
- >high speeds, and Zip wrote back saying that out of the 10,000+ 10 Mhz zips
- >sold, none had become damaged from being ran at 10 Mhz. And later the real
- >reason why Todd's processor becoming damaged had been discovered, which was
- >unrelated to running at 10 Mhz.
- >
- > Now, before the 14 Mhz chip, Zip would buy large quantities of 8 Mhz
- >chips and then run them at higher speeds to see if they could run at that
- >speed. WDC sells chips rated at 8 Mhz, but many are capable of running faster.
- >But there isn't anything wrong with running a chip faster than its rating, or
- >at least nothing proven yet.
- >
- >--
- >| Hal Bouma | Send mail to: HBouma@Macalstr.edu |
- >| Macalester College, St. Paul, MN. | and HBouma@Macalstr.Bitnet |
- > \ Things that make you go Hmmm: System 6, GNO, DreamGrafix, SoundMeister /
- > \ Coming sometime this decade for the //GS : NBA! (GNO compatible too!) /
- > \ Drop by and say hi to us anytime on the #AppleIIGS channel on IRC!! /
-
- Anyone wants to tell us how to modify the ZipGSX v1.02 so it will accept
- the 14 Mhz cpu? I've asked around about this for awhile now, and it seems
- no one really knows, or aren't willing to share... I guess I'll ask
- Bill Heineman and see if he wants to write a text file (preferrable for
- speeds like 9, 10, 12, and 14 Mhz.)
-
- Jimmy
-
-
- --
- Jimmy Shaw RamFAST, ZipGSX and 6.0... Apple II Forever!
- jimmys@ics.uci.edu
- -----------------------------------------------------------------------------
-