Hello, I've been developing 'device drivers' for some HP1000 boards to allow those devices to be run under a freeware HP operating system and programming language. There are a few boards I don't have documentation for, but would like to offer drivers for. Here is a list of HP interface manuals I'm looking for: 59310B BUS I/O - the standard instrument control HPIB bus interface board. 91200B TV INTERFACE - apparently a NTSC bit-map video display board. 12554A 16-BIT DUPLEX REGISTER - I understand and use this board, but I have one or two that need repairs. 12968 ASYNC COM INTERFACE - apparently the BACI boards little brother? 12972 8-CHANNEL ASYNC MUX - 8 RS-232 serial ports on a single I/O card. The top 3 are higher in priority than the last two.