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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: FrankBrana on December 13, 2004, 01:12:22 PM

Title: A3000T experts!
Post by: FrankBrana on December 13, 2004, 01:12:22 PM

Hi

Does anyone know where to gt the default jumper configuration for a 3000T without 030 onmobbo but 3640?

PLs help!

Thx in advance

Title: Re: A3000T experts!
Post by: Tempest on December 13, 2004, 01:26:38 PM

Try this site:

A3640 in A3000(T):
http://homepages.ihug.co.nz/~miles.j/a3640.html


A3000(T) info:
http://homepages.ihug.co.nz/~miles.j/amiga.html

Title: Re: A3000T experts!
Post by: FrankBrana on December 13, 2004, 01:50:39 PM

Seems that the label of jumper of A3000D and A3000T doesnt match.

Im having trouble with that.

Any info apprecciated.

Best Regards

Frank

Title: Re: A3000T experts!
Post by: Tempest on December 13, 2004, 02:09:41 PM

A3000T SERVICE MANUAL JUMPER SETTINGS


                        313181          313181

JUMPER  PINS    -O1, -03, -OS   -02, -04, -06   DESCRIPTION

J 100   4               1-2             1-2     CLK9O Delay
J 102   3               2-3             2-3     System clock source
J 103   4               3-4             3-4     FPU enable & chip select source
J 104   3               1-2             1-2     CPU clock source
J 105   3               2-3             2-3     Enable/Disable clock driver
                                                (except CLK3O)
J 106   3               2-3             2-3     Short CLK9O signals together
J 107   3               2-3             2-3     Enable/Disable clock driver to
                                                CPU (CLK3O)
J 151   3               1-2             1-2     ROM timing (see table below)
J 152   3               1-2             1-2     ROM timing
J 200   3               1-2             2-3     NTSC/PAL
J 350   3               1-2             1-2     Tick clock source
J 351   3               2-3             2-3     Floppy drive 1 enable/disable
J 352   3               2-3             2-3     Light pen source
J 482   3               1-2             1-2     VE PPL loop adjust
J 483   3               -               -       Factory test points
J 851   3               2-3             2-3     RAM controller speed
J 852   3               1-2             1-2     RAM chip size


The Rom timing circuitry in GARY provides for 4 different speed settings to match
the output enable and access times of the ROMs being used.

313181 -O1 thru -06 are all 25 Mhz systems

J151    J152    Toe(min)        Tacc(min)

2-3     2-3     90 ns   160 ns
2-3     1-2     130     200
1-2     2-3     170     240
1-2     1-2     210     280

link:

http://home.t-online.de/home/r.benda/-A3000t-j.txt