I got an Amiga 2000, board Rev. 6 Does anyone know what is is?

enter image description here enter image description here
(click to enlarge)


It is not an aftermarket mod. As evidenced from numerous pictures on the net.

Like: A2000 Revision 6.3 Motherboard - on Big Book of Amiga Hardware – Amiga Models & Clones / Commodore: A2000

A2000 Revision 6.3 Motherboard - enter image description here

As explained there:

At the time, the Rev 4.x was in production, and the new board was desired for new production, as the price crossover from the 256K x 1 to the 256K x 4 memories had been reached. However, the Rev 5 board was completed ahead of the need for it. So the PCB guys did some additional cleanup work on the design, and I think the FCC people got involved, too. Regardless, the resulting Rev 6 motherboards were plagued with problems (in fairness, some were due to the switchover to a 68000 with faster signals, that was also noisier). - Dave Haynie

It's just a late time fix to get it shipping.

enter image description here
–– From: Amiga A2000_R6 Rev.1.38 (05.09.2012) AmigaWiki PDF

Some call it the "funky bridge" as explained in Amiga 2000 Rev 6 to Rev 6.2 (or 6.3) hardware changes.

It appears to be

Rev. 6.2: "Solder series connection of 68 Ohm and 270 pF to the very right of the 4 vias below CN303, other end of the circuit to ground. Eliminates power on Guru".
–– as documented here: AmigaWiki A2000 Mainboard Upgrade

  • 1
    Yeah, that's exactly what is on the photo. – Janka Jun 10 '19 at 20:19

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