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Re: ZIP GSX 1.0.1 vs 1.0.2
Bill Buckels wrote:
I was able to get a 4 MHZ ZIP II which is what I was after at the start.
I also got a 3.6 MHZ Transwarp as a back-up while I was at-it.
Congratulations!
According to the Wikipedia Article
http://en.wikipedia.org/wiki/Apple_II_accelerators
The March 1986 Apple Assembly Line (volume 6, number 6) "determined that the
TransWarp was faster than either the McT SpeedDemon or Titan Accelerator //e
when running the same applications, even though all three cards ran at the
same 3.58 MHz native speed."
This is no doubt a function of the caching/non-caching architectures of
the cards, and how cleverly they handle write-through to Apple memory.
Also the Wikipedia article mentions the Transwarp's other features such as
configurable slot speeds (like the ZIP chip) and mentions that while the
Titan Accelerator //e solved an auxilliary memory problem that the earlier
version had, it did not offer high speed memory in the auxilliary bank while
the Transwarp did.
The SpeedDemon and Titan were "1st generation" accelerators, and lacked
some of the finesse--or brute force--of later generations.
The Zip Chip is particularly clever in its buffering of write-throughs,
so that it need not slow down for Apple memory writes unless they occur
closer together than 4 cycles (for the 4MHz) or 8 cycles (for the 8MHz).
-michael
AppleCrate II: An Apple II "blade server"!
Home page: http://members.aol.com/MJMahon/
"The wastebasket is our most important design
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