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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: TjLaZer on November 16, 2006, 03:25:52 AM

Title: A3000T Fast slot not working
Post by: TjLaZer on November 16, 2006, 03:25:52 AM

Well trying to get my 3000T running again it seems the CPU slot does not work.  I had a CSMK2 in it and system would not boot, I tore it apart to reseat the card (had to do that a few times in the past to get it to boot)  This time it does not work.  If I remove the card it boots to the onboard 030 fine.  I suspected the MK2 was defective, so I installed it in a 4000 today and it works fine.  I tried to clean the cpu slot with sand paper in slit and no go.  Anything else I can do?  I tried to see if my A3640 would work but it seems I am missing a chip: 74F08N.  Gonna order it and see if I can get that 040 working in it...

Title: Re: A3000T Fast slot not working
Post by: Jeff on November 16, 2006, 04:52:04 AM

My A3000T also has the onboard 68030 like yours (Some A3000T-040's did not).

When I changed mine over to use a rev 3.2 A3640 board in the fast slot I remember changing some jumpers to get it to work, and also adding the 74F08N (there is another jumper for that if it's installed as I remember). I don't think the fast slot will work without these jumper changes.  The National Amiga Technical pages was the source of this information for me as I remember. I'll try to dig it up if you need it.

Sorry if you know this and have tried it already.  PS I also had to upgrade my Roms and make sure the memory was all static column if I'm thinking clearly (this was over 10 years ago :-D)

Good Luck,
Jeff

Title: Re: A3000T Fast slot not working
Post by: TjLaZer on November 16, 2006, 06:23:40 AM

Yeah I googled and found this text on jumpers:

A3000T (normal030) A3000T (A3640) |  A3000T (A3640-74F08) A3000T (normal030-74F08)

J100  1-2 (closed)    3-4 (removed)  |  3-4 (removed)        1-2 (closed)
J102  2-3 (closed)    2-3 (closed)   |  2-3 (closed)         2-3 (closed)
J104  1-2 (closed)    2-3 (removed)  |  2-3 (removed)        1-2 (closed)
J105  2-3 (removed)   2-3 (removed)  |  1-2 (closed)         1-2 (closed)
J106  2-3 (removed)   2-3 (removed)  |  1-2 (closed)         1-2 (closed)
J107  2-3 (removed)   2-3 (removed)  |  1-2 (closed)         1-2 (closed)

I also ordered the 74F08 chip today so I can get my 040 working in it.

So can Fast Slots go bad?