Fred Cisin wrote: I think it must be a derivative of the PC-Jr design. With no disk in the drives, it boots up into a 40-col screen with IBM PC Jr BASIC Version J1.00 copyright IBM with 42646 bytes free, all white letters on black background. The initial boot screen is a multi-colour rainbow affair with 64K written at the bottom left. The system box has plugs at the back for keyboard, monitor, RS-232, 2 joysticks, printer, audio, cassette and light pen. My unit has a white 5.25" drive with "360K" written on it in pen - so I guess this is only a 360K drive, but is probably a replacement as I doubt IBM would have clashed the colour scheme with the rest of the black system. Phil