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Author Topic: A3000 and CSPPC cards  (Read 2119 times)

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Offline AcillTopic starter

A3000 and CSPPC cards
« on: January 11, 2004, 03:09:18 PM »
Well I've done some reading and I see that most of the sites tell me I have to do the int 2 hack to get a CSPPC card to work. I was told the same thing about my MK III, but it was just for SCSI use and I never use the SCSI port on it. Do I have to do this hack for anything related to the PPC chip on the CSPPC or is it just another SCSI thing? I hear the old powerup stuff needs it, but I plan to use WarpUP since its more or less the standard these days. Please let me know.
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Offline Orjan

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Re: A3000 and CSPPC cards
« Reply #1 on: January 11, 2004, 04:07:44 PM »
As far as I know, the fix is only to allow SCSI to work properly, but no-one seems to know exactly if anything else is affected by not doing the fix... The good thing is that it is really easy to do it, providing you have soldered at least once in your life... :)
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Offline Crusher

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Re: A3000 and CSPPC cards
« Reply #2 on: January 11, 2004, 06:45:43 PM »
...and not using the CSPPC-scsi is like riding your bike when you have your Porsche Turbo in the garage  :-)
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Offline patrik

Re: A3000 and CSPPC cards
« Reply #3 on: January 11, 2004, 06:55:26 PM »
@Crusher:

Haha, 10 points for that one! :)


/Patrik
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Offline AcillTopic starter

Re: A3000 and CSPPC cards
« Reply #4 on: January 12, 2004, 03:49:04 AM »
I know the SCSI is fast, I am using a MK III now, but I have IDE drives installed using a Catweasel card. Its fast too and gets the job done. No use for the SCSI with no drives for it. The PPC seems to be working so far. Whats a good software to test it out so I can make sure?
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Offline patrik

Re: A3000 and CSPPC cards
« Reply #5 on: January 12, 2004, 03:57:16 AM »
@Acill:

If you just wanna make sure it works try one of the demos supplied with WarpUP. 'VoxelSpace' for example will give the PPC something to crunch :).

(edit):

Using SCSI-IDE bridges to connect your IDE drives to the CSPPC scsi would indeed result in some respectable performance increase as the data transfer-rates will be much higher and the transfers will be at very low cpu costs as it is DMAed straight into or from memory by the SCSI-controller of the CSPPC.

Happy PPCing!


/Patrik
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Offline prowler

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Re: A3000 and CSPPC cards
« Reply #6 on: January 12, 2004, 03:51:53 PM »
The int2 Hack is needed for SCSI, and I have also read that the PPC CPU needs it as well so it can work correctly with the system. Without the int2 patch, the CSPCC will not work.
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Offline Castellen

Re: A3000 and CSPPC cards
« Reply #7 on: January 12, 2004, 06:00:33 PM »
That's correct, you'll need to do the simple hardware modification in order for the Cyberstorm SCSI controller to function.
It's just a matter of fitting a wire which puts one of the interrupt lines into the CPU slot.  Most (all?) A3000D were like this and some A3000T.

I wrote an easy step-by-step guide a few months ago showing how to do this.
It's on Aminet, or look on my webserver:

http://amiga.serveftp.net

Look in the downloads section.
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Offline x56h34

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Re: A3000 and CSPPC cards
« Reply #8 on: January 12, 2004, 06:13:51 PM »
@Castellen:

About your guide. I was wondering what is the difference between your version and the one @ vgr.com? In your guide you mention connecting CN600 pin 19 to CN606 pin 82. The vgr.com guide mentions connecting pin 21 of U350 to CN606 pin 82. I've installed my int2 mod by following the vgr.com guide. I wanted to make my A3000D ready for a SCSI equipped accelerator.

Anyways, I am now wondering if these 2 guides are essentially 2 different methods of doing the INT2 mod, or could it be that one is incorrect?

Thanks.
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Offline Castellen

Re: A3000 and CSPPC cards
« Reply #9 on: January 17, 2004, 12:16:00 AM »
The solder point in guide I wrote is a slightly tidier and easier way of doing the same thing.

Pin 19 of CN600 is the physically closest and easiest point to the CPU slot.
If done as per the instructions, you get a very professional looking job.

In the testing section, you'll note that the testing is done from U352 pin 21 as a 2nd verification the wire has been soldered to the correct place.
U350-21 and CN600-19 are electrically jointed together.
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