[comp.sys.apple2] Apple DMA

jarr@pro-micol.cts.com (John Farris) (04/26/91)

It's simple, just set the number one DIP Switch to the open position <up>.
 ]
John

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isbell@athena.mit.edu (Charles L Isbell) (04/27/91)

jarr@pro-micol.cts.com (John Farris) writes:
|It's simple, just set the number one DIP Switch to the open position <up>.
| ]
|John

Thanks, but it didn't work.  What are those switches for anyway?

It may be a software problem.  Is there something I need with GS/OS
other than the SCSI.driver?  I ask because I seem to be able to boot
up 8bit stuff (or at least Copy II Plus) and read the disk....

AAAARRRRRRGGGGGHHHH

Peace.
             "California bugs the hell out of me.  An entire state, the largest
              state in the Union, consisting of people who are oblivious to the
              fact that they live in hell."
                                    -Kyle Baker, Why I Hate Saturn

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MIT has no opinions to adopt. | /  \ | isbell@athena.mit.edu, isbell@ai.mit.edu

alfter@nevada.edu (SCOTT ALFTER) (04/27/91)

In article <1991Apr27.022902.18662@athena.mit.edu> isbell@athena.mit.edu (Charles L Isbell) writes:
>Thanks, but it didn't work.  What are those switches for anyway?

The first switch, as has already been mentioned, control DMA.  The
other three set the SCSI ID of the card (set to 7 at the factory).
Here's the short list of switch combinations:

234    234    234    234    234    234    234    234
xxx=0  xx =1  x x=2  x  =3   xx=4   x =5    x=6     =7
         x     x      xx    x      x x    xx     xxx

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