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- Path: sparky!uunet!news.claremont.edu!ucivax!bonnie.ics.uci.edu!jimmys
- From: jimmys@bonnie.ics.uci.edu (Jimmy Shaw)
- Subject: fast 65816s and WDC
- Nntp-Posting-Host: bonnie.ics.uci.edu
- Message-ID: <2AB62F57.20842@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: 40
- Date: 15 Sep 92 18:45:44 GMT
-
- First off, I like to thank Brian Tao for posting the informative
- file about the 14 Mhz 65816 upgrades for the ZipGSX and TWgs.
-
- I've just got off the phone with Deb at WDC, and I'll save those of
- you who haven't call the trouble: this is what I found out (sort
- of a "first-step"):
-
- Send a $0.52 business sized SASE (self addressed stamped envelope) to WDC,
- attn: Deb, and write a short note about wanting the info on the 14 Mhz
- 816 and upgrades.
-
- And after you've gone through the tech. sheets, then you can call her
- back and order the 816.
-
- Now my question is (hopefully this will be covered in the info):
-
- Do all upgrades on the ZipGSX v1.02 are simple CPU and crystal swaps?
- Or do I actually have to do some soldering of additional resistors,
- chips, whatever? I would hope that no major additions are needed,
- since it's been 8 years since I held a soldering iron (took electronics
- when I was a freshmen in HIGH SCHOOL!)
-
- I currently have 4 Sony Srams on the 8Mhz Zipgsx. 35ns, and they make
- 64K. (exact chip #:CXK58258P-35 CMOS) How fast can I push these
- srams? I got tthe impression that this will do 10 Mhz fine, and may even
- go 13.75 Mhz (which is the recommanded speed for 5V).
-
- That's it for now, and thanks in advance.
-
- P.S. Has anyone got a split 128K cache in theirs? A guy around here
- (in Los Angeles) has a 128K cache on his ZipGSX, it's split 64/64,
- and it's awfully impressive. What he did was he piggy-backed four
- SRAM on top of 4 existing srams, and soldered them together!
-
-
- Jimmy
- --
- Jimmy Shaw RamFAST, ZipGSX and 6.0... Apple II Forever!
- jimmys@ics.uci.edu
- -----------------------------------------------------------------------------
-