uIEC/SD == AWESOME!

I'm coming late to this discussion, and I'm only on CCTech, so I may not have seen everything (not to mention not having had internet over Christmas, and having a lot of messages to skim as a result), but I'd like to get my bit in. Jim Brain wrote: You can probably make do without REN, too. The PET has it tied to ground, i.e. permanently asserted, for a start. Just assume it's asserted and you won't go far wrong! Commodore drives do some strange things with GPIB addressing. Bit 7 isn't supposed to be used, but I think Commodore use it to add a flag to the primary address when opening files. ISTR they may even use bit 6 this way, thus preventing you from having a device at (disk drive)+16. I don't have much HP stuff (although I do have some 80-series boxen), but one drive I'd like to see emulated would be the Tektronix 4907. This was a device for adding 8-inch floppies to your Tek 4050 series. The 4050 series has its own quirks with GPIB. The one that most annoyed me when I was using a Commodore 8050 with my Tek 4052 was its habit of asserting IFC when you least wanted it to. Like immediately before loading a program, thus causing the 8050 to forget all I had laboriously told it about the program I wanted to load... Philip.