Caple C871i Bedienungsanleitung PDF herunterladen (Seite 195)

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Apple II Computer Info

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Path:

blue.weeg.uiowa.edu!news.uiowa.edu!uunet!spool.mu.edu!uwm.edu!cs.utexas.edu!bcm!pe

ndragon!fullfeed!fullfeed!not-for-mail

From: [email protected] (Bradley VonHaden)

Newsgroups: comp.sys.apple2

Subject: RE: Bernoulli on a //gs? (Please Read)

Date: 26 Oct 1994 05:47:10 -0500

Organization: FullFeed Communications (Internet +1.608.246.2701 info)

Lines: 43

Message-ID: <[email protected]>

NNTP-Posting-Host: fullfeed.fullfeed.com

[email protected] (RKE) wrote:

>I am trying to attach a 90mb Bernoulli drive to my GS.

>My system is as follows:

>ROM 1 Apple //gs

>4mb AE RAM card

>8mhz ZIP GS

>Apple High-Speed SCSI card

>90 mb Bernoulli hard drive

>System 6.0.1

Three things I can think of to check:

One possibility is DMA compatibility. If your memory card is not DMA

compatible, then switch 1 on the Apple HS SCSI card should be open

(up).

Another possibility I guess is a SCSI ID conflict. The Apple HS SCSI

card's ID at the factory is set to 7. Here are the Apple HS SCSI

card switch combinations:

note: Switch 1 controls DMA; open (up) turns DMA off

note: Switches 2-4 control SCSI card ID

note: 'U' means open (up), 'D' means closed (down)

SWITCH: 1234 1234 1234 1234 1234 1234 1234 1234

SETTING: .UUU .UUD .UDU .UDD .DUU .DUD .DDU .DDD

CARD ID: 0 1 2 3 4 5 6 7

Third, the scsi chain needs termination power to work properly. This

is different from termination. Both are required for a properly

functioning scsi chain. It is possible that neither the Bernoulli

drive nor the Apple HS SCSI card is supplying termination power. If

this is the case, and there is no other device on the scsi chain to

supply said power, it probably won't work. There is a modification

(requires soldering skills) to the Apple HS SCSI card to make it

Apple II Computer Technical Information : Apple II Family Hardware Info

ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 195 of 572

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