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Branden Robinson" , "Jaap Akkerhuis" Date: Sun, 06 Oct 2024 16:21:44 +0000 Message-Id: In-Reply-To: <20241006151133.fbj6pmujpvuuo47d@illithid> References: <20241005001433.7hukoga5bbbb3ygl@illithid> <20241005222207.eerdrgtsttmx42kb@illithid> <20241006151133.fbj6pmujpvuuo47d@illithid> User-Agent: eM_Client/9.2.2280.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable Message-ID-Hash: KPPES5FPJ543OA5OCS5QY45K3BKN32H5 X-Message-ID-Hash: KPPES5FPJ543OA5OCS5QY45K3BKN32H5 X-MailFrom: ron@ronnatalie.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-tuhs.tuhs.org-0; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: "Jacobson, Doug W [E CPE]" , "tuhs@tuhs.org" , groff@gnu.org X-Mailman-Version: 3.3.6b1 Precedence: list Reply-To: Ron Natalie Subject: [TUHS] Re: Old troff files (1988-2007) List-Id: The Unix Heritage Society mailing list Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: For years JHU had a KSR37 with a Greek box and nroff drove it direcly=20 sending all those ESC-8 and ESC-9 things. There were some output=20 filters that converted this to things like the Diablo daisy wheels and=20 even the rather crude dot matrix lineprinter we had. Eventually, George Toth, one of our programmers came up with the idea of=20 building a C/A/T simulator. He went to the Naval Research Lab and=20 printed out a full typeface on film from their CAT. He then cut them=20 out and glued them to the front of an oscilliscope, one letter at a=20 time. There was a PDP-11/20 that ran a Scanning Transmission Electron=20 Microscope (at the time one of the few in captivity). He would take=20 the scanning driver cables from the microscope and put them on the X/Y=20 of the oscilliscope and then took the sense wire and put it on a=20 photomultiplier tube that was mounted in a scope camera. He then fired=20 up the (DOS/BATCH) microscope software to tell it to do a scan. He=E2=80= =99d=20 then swap the RK05 packs and bring up Minunix and read his scanned=20 character out of the frame buffer. One character at a time he accumulated an entire Roman, Bold, Italic,=20 and Symbol set. He wrote the emulator and we could TROFF through his=20 software to the Versatec lineprinter we had. The chemicals from those=20 printers makes my skin break out just thinking about it. It was the=20 only printer we had at BRL for political reasons for quite a while. It=20 also would eat the ink of the government issued (made oddly by a=20 workshop for the blind) pens. -Ron