Caple C871i Manual do Utilizador descarregar pdf (Página 571)

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Apple II Computer Info

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### Created : Tuesday, November 4, 1997 Modified: Tuesday, November 4, 1997

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From: Rubywand <[email protected]>

Newsgroups: comp.sys.apple2

Subject: Re: Apple IIGS ZipChip

Date: Tue, 04 Nov 1997 03:53:42 -0600

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Ron McGowan writes ...

> Help!

> I have a IIGS with a stock zip chip that, until recently,

> would pass the GS self test, but now fails with

> SYSTEM BAD 05012A00 ....

The DIP switches on at least some versions of the ZipGS are not

especially reliable. On one board, I finally just popped off the switch

assemply cover and removed the switch pieces to guarantee that the

switches that should be open really were. Solder connects were used to

close switches.

If SW-4 is not closing, the ZipGS will not pass the Self-Test. On

the other hand, your ZipGS will run a bit slower; which is probably why

the default setting is OFF.

You can use an Ohm meter (set to the x 1000 range to limit current)

to check the switches on your board by measuring across each mini-switch

while you open and close it.

Another possible problem is Zip Init. Some users install it on

their hard disks because it is available to be installed and forget that

it's there. Zip Init's settings will automatically over-ride your

on-board settings when your system is booted. It is intended for

installation on bootable diskettes for changing settings to match the

Apple II Computer Technical Information : Apple II Family Hardware Info

ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 571 of 572

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