KA10: Data Disc font

[larsbrinkhoff]

I will try to get an approximate font for the Data Disc display from this video. I will post screenshots and make notes here.
https://archive.org/details/cst_000027
https://www.youtube.com/watch?v=BefgBDG2p8w

CC @bgbaumgart

[larsbrinkhoff]

[larsbrinkhoff]

[larsbrinkhoff]

[larsbrinkhoff]

[larsbrinkhoff]

[larsbrinkhoff]

[larsbrinkhoff]

[larsbrinkhoff]

Compare with current Data Disc emulation:

---

Note the date, MAY 12. DEC,BH made four logins that day:

  PRJ,PRG  Job  Login             Logout            Line
  DEC, BH   36  1975-05-12 11:35  1975-05-12 11:39   43
  DEC, BH   36  1975-05-12 11:39  1975-05-12 12:19   43
  DEC, BH   41  1975-05-12 12:22  1975-05-12 12:31   36
  DEC, BH   52  1975-05-12 15:24  1975-05-12 16:11   36
  DEC, BH   17  1975-05-12 16:48  1975-05-12 16:51   41

[larsbrinkhoff]

Here's an interesting detail. A regular upper-case A, a double-height A from HOT, and the large A from the line editor help screen. The last one looks different; maybe it's a special font or graphics?

---

Answer: There is a special program [BH,DEC]LINE to display the help screen.

[larsbrinkhoff]

For reference, this is what the manual says. Obviously the SAIL Data Disc had lower-case characters and the extended ASCII set. Descenders in the screen shots look like they are one or two pixels, so the character matrix would be 5x8 or 5x9.