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Re: reprints of old AI memos (was Re: boxing all integers)f

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Kragen Javier Sitaker wrote:
> I am pretty sure that the data in these PDF files is grayscale

Yes, that's right.

> Perhaps this grayscale is a product of the “PDP-11 emulator running the
> original XGP driver code” mentioned in the README

Yes.  Just printing the raw pixels to the output PDF doesn't look good,
and certainly nothing like the original XGP output.  Angelo Papenhoff
and I did the "print emulation" trying to match the originals.  There's
a metaball type model for dispersing and blending individual print dots.
You can see the code in the xgp files here: https://github.com/aap/pdp11

> I wonder if TJ6 could be hacked to output a .dvi-like list of (glyph,
> x, y) triples?

The output from TJ6 is an "XGP file", which is ASCII text interspersed
with control codes.  This is sent by the printer spooler to the PDP-11,
along with font data.  The PDP-11 does the rendering and sends it to the
XGP for output to continuous roll paper.  There's a knife to cut the
paper into pages.

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boxing all integers (was Re: Resources to learn common lisp?) Kragen Javier Sitaker <kragen@canonical.org> - 2026-08-29 17:52 -0300
  Re: boxing all integers (was Re: Resources to learn common lisp?) Lars Brinkhoff <lars.spam@nocrew.org> - 2026-08-30 06:43 +0000
    Re: reprints of old AI memos (was Re: boxing all integers)f Kragen Javier Sitaker <kragen@canonical.org> - 2026-08-30 13:11 -0300
      Re: reprints of old AI memos (was Re: boxing all integers)f Lars Brinkhoff <lars.spam@nocrew.org> - 2026-08-31 05:14 +0000
        Re: reprints of old AI memos (was Re: boxing all integers) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-08-31 06:54 +0000
        Re: reprints of old AI memos (was Re: boxing all integers)f Kragen Javier Sitaker <kragen@canonical.org> - 2026-08-31 13:43 -0300
          Re: reprints of old AI memos (was Re: boxing all integers)f Kragen Javier Sitaker <kragen@canonical.org> - 2026-08-31 13:56 -0300
            Re: reprints of old AI memos (was Re: boxing all integers)f Paul Rubin <no.email@nospam.invalid> - 2026-08-31 13:34 -0700
              Re: reprints of old AI memos (was Re: boxing all integers)f Rich Alderson <news@alderson.users.panix.com> - 2026-08-31 18:12 -0400
                Re: reprints of old AI memos (was Re: boxing all integers)f scott@slp53.sl.home (Scott Lurndal) - 2026-09-01 15:12 +0000
            Re: reprints of old AI memos (was Re: boxing all integers)f Lars Brinkhoff <lars.spam@nocrew.org> - 2026-09-01 05:59 +0000
              Re: reprints of old AI memos (was Re: boxing all integers)f Kragen Javier Sitaker <kragen@canonical.org> - 2026-09-02 15:23 -0300
          Re: reprints of old AI memos (was Re: boxing all integers) Lars Brinkhoff <lars.spam@nocrew.org> - 2026-09-01 05:45 +0000
            Re: reprints of old AI memos (was Re: boxing all integers) Lars Brinkhoff <lars.spam@nocrew.org> - 2026-09-01 07:07 +0000
            Re: reprints of old AI memos (was Re: boxing all integers) Rich Alderson <news@alderson.users.panix.com> - 2026-09-01 17:36 -0400
              the history of the Hershey fonts (was Re: reprints of old AI memos) Kragen Javier Sitaker <kragen@canonical.org> - 2026-09-02 15:55 -0300
                Re: the history of the Hershey fonts (was Re: reprints of old AI memos) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-02 21:31 +0000
                Re: the history of the Hershey fonts (was Re: reprints of old AI memos) Kragen Javier Sitaker <kragen@canonical.org> - 2026-09-03 09:59 -0300
            Re: reprints of old AI memos (was Re: boxing all integers) Kragen Javier Sitaker <kragen@canonical.org> - 2026-09-02 16:35 -0300
              Re: reprints of old AI memos (was Re: boxing all integers) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-02 21:50 +0000
                PDF file compactness (was Re: reprints of old AI memos) Kragen Javier Sitaker <kragen@canonical.org> - 2026-09-03 12:06 -0300
              Re: reprints of old AI memos (was Re: boxing all integers) Lars Brinkhoff <lars.spam@nocrew.org> - 2026-09-03 05:42 +0000
                Re: reprints of old AI memos (was Re: boxing all integers) Kragen Javier Sitaker <kragen@canonical.org> - 2026-09-03 12:50 -0300
            origin of XGP fonts (was Re: reprints of old AI memos) Kragen Javier Sitaker <kragen@canonical.org> - 2026-09-28 10:44 -0300
              Re: origin of XGP fonts (was Re: reprints of old AI memos) Peter Flass <Peter@Iron-Spring.com> - 2026-09-28 07:33 -0700
                Re: origin of XGP fonts (was Re: reprints of old AI memos) Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-09-28 22:53 +0800
      Re: reprints of old AI memos (was Re: boxing all integers)f Lars Brinkhoff <lars.spam@nocrew.org> - 2026-09-06 08:40 +0000

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