December 13th, 2018

IBM PC XT

By whatever chance, I visited an old science laboratory where I played at times when I was a teenager. They still have a pile of old equipment, including the IBM PC XT clone that I tinkered with.

Back in the day, they also had a PDP-11, already old, which had a magnetic tape unit. They also had data sets on those tapes. The PC XT was a new hotness, and they wanted to use it for data visualization. It was a difficult task to find a place that could read the data off the tape and write to 5.25" floppies. Impossible, really.

I stepped in and went to connect the two over RS-232. I threw together a program in Turbo Pascal, which did the job of shuffling the characters between the MS-DOS and the mini, thus allowing to log in and initiate a transfer of the data. I don't remember if we used an ancient Kermit, or just printed the numbers in FORTRAN, then captured them on the PC.

The PDP-11 didn't survive for me to take a picture, but the PC XT did.