Hi, I've got a Superbrain here with a little ROM carrier board plugged into the CRTC chip socket on the Superbrain main board. The carrier board then contains a TMS2516 EPROM, the CRT8002B IC, and a 74LS08 chip. Is this something that someone's come across before? Looking at the ROM contents it looks likely to be a character table. Ideally what I'd like to do though is take the board out completely and put the CRTC chip directly back in the socket on the Superbrain's system board, as the carrier board's right in the way of some of the ICs I need access to in order to diagnose the fault with the system... cheers Jules -- (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination.