Modifying a RXV21 for an 11/83

[Jerry Weiss]

On 1/24/21 11:27 AM, Chris Zach via cctalk wrote:
> So I found an RXV21 board in the pile of stuff here and popped it into 
> my 83. Crashes the system. It's an M8029 D board, and I see from this 
> site that you have to add a few traces and cut a few others to make it 
> work on an 11/73 or better.
>
> http://www.chdickman.com/rx02/
>
> I'll pop in an 11/23+ CPU just to test it, but is it really just 
> putting in two wires on the top of the board and cutting a total of 
> three traces? Looks simple enough...
>
> C

My M8029 stamped Rev F  has three jumpers and three trace cuts. It 
matches the images posted in the link and works with an 11/73 ot 11/83. 
But yes, it should be that simple.

There is a sharpied H on my card, which it is not the way DEC marked 
these boards. The available field maintenance prints refer to this (no 
G).  I don't know what the change was.

    Jerry