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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Bokasa on March 06, 2013, 01:08:48 PM

Title: A4000T+a3640
Post by: Bokasa on March 06, 2013, 01:08:48 PM

Hi,
I need information about A3640. Could A4000T work with 3.1 revision???
Thanks

Title: Re: A4000T+a3640
Post by: Matt_H on March 06, 2013, 11:24:25 PM

Yup. I believe it was the standard CPU card that shipped with 4000Ts originally.

Title: Re: A4000T+a3640
Post by: Crumb on March 06, 2013, 11:45:20 PM

A4000T use A3640 rev3.2. Boards included with A4000T are rev3.2 despiting that these have printed 3.1 instead of 3.2

Title: Re: A4000T+a3640
Post by: esc on March 07, 2013, 12:28:06 AM

Bokasa, if you have a3640 rev 3.1, it can be upgraded by many people :)

Title: Re: A4000T+a3640
Post by: videofx on March 07, 2013, 03:19:14 AM

My A3640 is Rev 3.1, what is the difference between 3.1 and 3.2?

Title: Re: A4000T+a3640
Post by: esc on March 07, 2013, 03:29:49 AM

Not sure exactly.  Check http://pink.myshoesaretootight.com/mirrors/amiga.serveftp.net/A4000_HardwareGuide/a3640ref.html

Basically there are some dma issues with 3.1 and certain boards.  Also, some caps have reversed polarity on 3.1 and should be reversed so they don't leak.

Title: Re: A4000T+a3640
Post by: Jeff on March 07, 2013, 04:15:44 AM

Quote from: esc;728456

Not sure exactly.  Check http://pink.myshoesaretootight.com/mirrors/amiga.serveftp.net/A4000_HardwareGuide/a3640ref.html

Basically there are some dma issues with 3.1 and certain boards.  Also, some caps have reversed polarity on 3.1 and should be reversed so they don't leak.

As I recall the if the PAL ic at location U209 is a revision -03 and the A3640 board is labeled 3.1 then this is the latest 3.2 3640.

Title: Re: A4000T+a3640
Post by: videofx on March 07, 2013, 10:20:49 AM

I checked the document for the A3640 and I do infact have a Rev 3.2 and not 3.1 as the board says. My PAL at U209 is a Rev -03 :)

Title: Re: A4000T+a3640
Post by: Bokasa on March 08, 2013, 08:59:25 AM

Quote from: videofx;728480

I checked the document for the A3640 and I do infact have a Rev 3.2 and not 3.1 as the board says. My PAL at U209 is a Rev -03 :)

The problem is:
My A4000T can't work with my A3640 (rev 3.1, U209 is -02) but working good with A3630. At the other side, my A3640 working good in my A4000D. I tried everything, and at one moment I put A4000D kickstart eproms in A4000T, and everything is fine with combination A4000T+A3640 (except SCSI of course). So I can't understand what could be problem. Maybe revision of A3640???
Thanks.

Title: Re: A4000T+a3640
Post by: José Manuel on March 08, 2013, 09:03:27 AM

you have workbench.libray in libs: ?
and 68040 library?
and jumpers in ext?

Title: Re: A4000T+a3640
Post by: Jose on March 08, 2013, 02:26:06 PM

Did you set the clock jumpers on the motherboard correctly ?

Title: Re: A4000T+a3640
Post by: Bokasa on March 10, 2013, 08:55:24 AM

Quote from: Jose;728589

Did you set the clock jumpers on the motherboard correctly ?

All jumpers are ok. With unplugged drives theres no kickstart screen nor light gray screen.