Along the lines of this thread have a look at: <https://www.youtube.com/watch?v=KMLyKHFtcgg> Early IBM stuff. On 1/23/2021 2:49 PM, Harold Hallikainen wrote: > That's great! As I've mentioned previously, I used a Lear Siegler ADM-1 > -- Richard Knoppow 1oldlens1 at ix.netcom.com WB6KBL