Caple C871i Manual do Utilizador descarregar pdf (Página 535)

Apple II Computer Info

high speed operation. I did not need to for 13.75MHz. Matt

Portune's Zip _would not work_ WITH the replacement gates. And

my stack, ZipUpgrade.SHK and ZipUpgrade.BSQ from ground, also

shows where to get parts for upgrading without soldering the board.

Upgrading both accelerators is easy. ....

Thanks for re-posting this info with the appropriate headlines--

pretty interesting stuff! (I had overlooked the original.) It seems

that Scott is becoming the IIgs Accelerators Guru.

Rubywand

SPEED COMPARISON OF 8K VS 32K CACHE

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The following is cut from an email from Joachim Lange of ///SHH Systeme, who

sells the 8-->32k upgrade board

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The larger cache size gives you more speed without the need of increasing

the processor's clock frequency. The overall gain in speed is about 20..30

per cent, however the Finder feeling is a lot more "snappy".

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The following is cut from a post from CSA2 that was made by Rubywand

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John Link charted some comparisons in 1991 involving nine setups:

no-TWGS, and 7, 8, 9, 10mHz boards before and after the 8kB-to-32kB

cache upgrade. He used three benchmarks:

1. time to calculate page breaks in a 218-page Appleworks document

2. time to scroll through a 39-page Awks-GS document

3. time to compile 4800 lines of MD-BASIC source code

The chart shows that a 7mHz TWGS with the 32kB cache performs

slightly better than a 10mHz TWGS with 8kB cache on tests 1 and 3; it is

a bit slower on test 2.

For a 7mHz 8kB TWGS, the speed gain for the 32kB cache upgrade is

roughly 33% to nearly x2.5 plain GS speed.

For a 10mHz 8kB TWGS, the speed gain for the 32kB cache upgrade is

roughly 33% to about x3.25 plain GS speed.

One nice feature of upgrading cache is that you get a good

performance boost without the concerns usually assorted with a

significant increase in clock speed.

The AE cache upgrade kit was priced at $109 in 1991. Now that AE is

gone, the kit may be harder to find than a TWGS with the 32kB upgrade

installed.

As Scott G has noted, SHH Systeme, Germany sells 32kB cache upgrade

materials.

SHH Systeme, Germany ( http://users.ids.net/~kerwood/shh.html email:

[email protected] )

The catch is that, according to information currently displayed at their

web site, you can get everything you need _except_ the v1.7 or v1.8 ROM.

Here is what they say ...

Apple II Computer Technical Information : Apple II Family Hardware Info

ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 535 of 572

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