Hamurabi Focal source

On 3/30/10, Vincent Slyngstad <vrs at msn.com> wrote: I might just have to do that. I have several ways to read papertapes directly into pre-Omnibus PDP-8s, but I'd have to think a bit on the best way to attach something to a "modern machine" to read tapes for uploading. I have an RS-232<->20mA adapter lying around, but no docs and I haven't yet reverse-engineered the schematic to ensure it's using the alternate EIA pins for current loop. That's one option. I'm sure I have an IBM 5150 or 5160 with an original serial card (that could support current loop), but it'd be at the bottom of a stack in storage. Building a current loop adapter from scratch might be the fastest path. I have an ASR33 and a DEC PRS/04 reader (both current loop, one 110 bps, one faster, IIRC). I'm implying that I don't know for certain that the tape I have is that exact tape. I have *a* tape. I haven't looked at it this year, so I'm allowing for fuzzy memory. I might have a tape containing a later version of the program, if there happened to ever be one. I have not. I just did a few minutes digging (beyond a one-line drive-by googling) to help the original questor. Doug would be an authoritative source, but in case he doesn't have a 40+-year-old program lying around in easy-to-access machine readable form, one could pursue the DECUS route as well. I don't have all that much of the older stuff myself - perhaps a handful of papertapes (less than 10) and perhaps a floppy or two. My only exposure to the vast majority of those programs is those same blurbs that are already well circulated. -ethan