HP-IB disc drive emulation program available

Asbsolutely noting. In fact nothing that can't be reproduced with analogue parts (Vonada's <n>th law : digital circuits are made from analuge parts). This is a buffer in the sense of 'signal amplifier' not 'area of RAM', of course. The thing is that I suspoect (without reading the data sheets) that most microcontrollers can't meet the HPIB spec on their port pins, you need to put something between the port and the 24 pin microribbon connector. Might as well be one of the chips designed for the purpose. In any case I have an objection to linking an expensive (probably) custom-programmed (certianly) part to an external connector that's going to be linked to $deity-knows-what. Much easier to replace a buffer chip if somethign goes wrong than replace the microocontroller and have to program it again. -tony