Vectrex Fault Repair Solution

[Purity]

I recently fixed a Vectrex and thought I would share what I did.

 

The unit powered up but would loop on the Mine Storm game. Here's a video:

 

 

My guess was that it was an issue with the rams (which are 2114 rams) or an issue with the rom.

 

I took it apart and removed the rams and fitted sockets. Both rams tested ok. I then removed the rom which was a D2763-4. I managed to read it as a 2764 eprom on my programmer, and checked it against the bios “exec rom intl 284001-1” from Mame, which showed it had one “bit” of bad data!

 

I used the rom data on Mame to see what it did. Unsurprisly it crashed at the same point as the Vectrex, which confirmed the rom was at fault.

 

I re-burnt a new bios file to a 2764 eprom, put the Vectrex back together, and I now have a working system :-)

 

Edited September 16, 2016 by Purity

[Rob Mitchell]

Great!