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- From: taob@terranet.cts.com (Brian Tao)
- Newsgroups: comp.sys.apple2
- Subject: Sanyo 14MHz chips
- Message-ID: <9208130436.aa12083@generic.UUCP>
- Date: 13 Aug 92 08:23:25 GMT
- Sender: daemon@ucbvax.BERKELEY.EDU
- Organization: The Internet
- Lines: 26
-
- behrenss@Informatik.TU-Muenchen.DE (Soenke Behrens) writes...
- >
- >I guess for 12 MHz 17ns would be ok, though (17ns are much cheaper
- >than 15ns).
-
- 1/(2*12 MHz) = 4.167e-08 or 40 nanoseconds.
-
- >You need 4 32k*8 chips.
-
- I left a message to a few dealers on a local system about SRAM's.
- I can get 20 ns 32k*8 SRAM's for $10.40 (Canadian) + tax apiece. That
- comes out to $47.84 in all for four pieces. The 65816 will cost me
- about $125 after exchange and duty and a 50-MHz oscillator will be
- less than $10. That's a total of $182.84 for parts. Zip's upgrade
- will cost me at least twice that. Is there any reason why I should
- let Zip upgrade my card to 12.5 MHz?
-
- I read in a previous message that some traces on the ZipGS board
- could be cut and re-routed into 3 TTL's to avoid the bottleneck. Can
- someone post the exact details for this operation? I would also like
- a detailed parts list required for the upgrade (especially specs and
- part numbers for SRAM's that work with the Zip).
- --
- Brian T. Tao =*8-) | ::::::::> tcomtaob@chasm.scar.utoronto.ca <::::::::
- Dept. of Exobiology | :::::> generic!terranet!taob@zoo.toronto.edu <:::::
- University of Toronto | "Though this be madness, yet there is method in't."
-