[HECnet] Need help with VT220 down-line loadable characters (DECDLD)

[Johnny Billquist]

On 2013-07-23 23:58, Mark Abene wrote:
Assuming you're aware of this page:
http://www.vt100.net/docs/vt510-rm/DECDLD

Johnny, wasn't there a version of Pac-man using DECDLD graphics written
in your neck of the woods?   I seem to remember it was written in Pascal
on TOPS-20, possibly at KTH.

Quite possibly, but I can't recall offhand. I have (had) some prank fonts, as well as my own designed fonts for the Z-machine. And I know there is a GIF viewer out there, which uses soft fonts to render pictures on some VT terminals (not sure exactly which ones, though...).

	Johnny


-Mark



On Sun, Jul 21, 2013 at 11:03 AM, Julian Wolfe <julian at twinax.org
<mailto:julian at twinax.org>> wrote:

      I know this is a bit off-topic, but I was playing around with the
      DECDLD commands in the VT220 programmer's reference guide to make
      character graphics on the VT220 (I'm actually using Mac240, a VT220
      emulator that has full DECDLD support at a VT220 level)

      I'm having a problem getting characters to join at the top of the
      cell.   The top two pixels don't seem to meet.

      I see some material about VT320 but the addressing of the matrix
      seems quite different on that terminal.

      I'm using 7-bit encoding to create the characters.   Do   I need to
      use 8-bit in order to use the full matrix?

      I'd be surprised if anyone on here has actually messed with this,
      but I thought it was worth a shot.

      I can also toss my work at whoever has a VT220 lying around to see
      if they can test it as well.

      Any input is appreciated (as long as I can decode it, ha ha)

      Julian




-- 
Johnny Billquist                                   || "I'm on a bus
                                                                  ||   on a psychedelic trip
email: bqt at softjar.se                         ||   Reading murder books
pdp is alive!                                         ||   tryin' to stay hip" - B. Idol