User`s guide

Fibinacci 2006.00 605.00 634.00 645.33 507.00 523.00 548.00
Integer 1553.40 307.00 330.00 346.67 420.00 431.00 443.00
Dhrystone 236 1136 1063 1000 NA NA NA
* 1351 1183 1282 NA NA
* Dhrystone v1.1 re-compiled under ORCA/C v2.0.1
System Software 5.0 QuickDraw II improvement test:
Stock //gs: 5648 ticks
TWGS 15 MHz: 1332 ticks (over 4x faster than stock)
If you look at the numbers, a 12 MHz or faster TWGS/Zip will make everything
just about 4x faster than a stock //gs.
____________________________
From: Scott G.
019- How can I modify my ZipGS for more cache and more
speed?
The process described below is very simple. It aims for a speed of 12.5MHz
(or better) with 64k cache.
First, you will need one of the new Western Design Center 14MHz 65C816's.
Students, teachers, and professors can order the IC in single quantities
directly from WDC ( http://www.wdesignc.com ). Otherwise, the minimum order is
$100. Price is about $20 each.
adapters: Nearly all of the newer, faster 32k x 8 SRAMs are in skinny 300-
mil packages. If you would rather not modify your ZipGS for the skinny SRAMs,
Digi-Key stocks 28-pin 300-mil to 600-mil adapter sockets from Aries Electronics
for about $12 each (Aries no. 1106396-28). You can plug a 28 pin SRAM into the
300-mil adapter socket and the adapter in turn plugs into the 600-mil socket on
the Zip. (If you have some spare sockets lying around, you can build your own
cheap, but that's another story.)
2-4 32k x 8 SRAM chips: There are many sources for 32k x 8 SRAMs and
several types that will work. I got mine (HM62832-15, $5 each) from JDR
Microdevices. You'll want 15ns in the Tag RAM sockets. Up to around 12.5MHz, you
want 70ns or faster Data RAM. If current cache size is 64k, your old TAG RAM
chips will, usually, work as Data RAM and can be transferred to the Data
sockets. Otherwise, go ahead and get two 25ns-35ns 32k x 8 SRAM chips for the
Data RAM.
Data RAM should always be slower than Tag RAM. Barry Rees posted his
experiences on this matter (that Data should be significantly slower than Tag)
and I found that the original Tag chips were fast enough.
A "full size" oscillator module: Digi-Key, JDR, Mouser, ... have these.
Divide oscillator speed by four to get Zip speed. JDR has the OSC50.0 (50MHz