it I have no Doco or software for the DL8a, from memory there may be something in ROM, but I know that some of the ROM sockets are empty. It is contained in a single 19" rack mount case, mainly made from aluminium. On the back panel there is the fan, the power connector and a single female 25 pin D connector (I think it's a current loop port). The front panel is white with black lettering. All switches are toggle swicthes, some have red hoods, some have blue. I think there are seperate banks of switches for address and data as well as the usual halt, run, examine, etc. All the LEDs are red. I have powered it up and watched it count in binary, but as I don't know 8080 and have never programmed a front panel system I haven't done anything else Does this ring a bell for anyone? A