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XGP - Xerox graphics printer #427
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Will accept text files, plot files (vector graphics), or scan files (bitmaps). |
(Relevant for #863 too.) I've experimented with this a bit on the ats/xgpglp branch. XGP/GLP (XQUEUE) and XGPDEV/GLPDEV work with a bit of tweaking, and XGPSPL at least builds, although none of this is directly useful at the moment. I was hoping GLP would work with VERSA, but while they use the same spool directory, GLP doesn't produce filenames that VERSA likes... |
Maybe se should ask DCP som questions.
...anything Else? |
After comparing VERSA 211 and INFO; XGP, there are a number of XGP commands that VERSA either doesn't implement fully (e.g. line spacing, underlining) or doesn't implement at all (margins, vector drawing). I've tried adding support for margins and correct line feed behaviour, which makes TJ6 output look much better. Do we have any high-quality (ideally 600 DPI) scans of real XGP output? @larsbrinkhoff, you mentioned you had scans of an XGP listing of Dazzle Dart recently... but it would also be nice to have something that uses underlining and multiple font sizes, to compare spacing against. |
The book about the Muddle programming language says:
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I have real XGP output -- the zork sources printed out from circa 1980. One could scan them in at any resolution. But what good are scans of XGP output? |
Right, the Dazzle Dart scan is on the lars/dazzle branch. Maybe it's output from "@"? Probably many AI memos were printed on the XGP. I beleve the XGP had a resolution of about 200 DPI. |
I removed "SYSEN2; XD 430 - XGP display" because it duplicates #634. |
Split off XGP to #1077. |
All done. |
In 2001, Mark Crispin wrote to ITS-LOVERS:
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The SSV4 software for the Imlac PDS-4 supports an "XGP graphics mode".
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From page 62 here: https://www.isi.edu/publications/trpublic/pdfs/sr-75-3.pdf And page 75. |
According to https://www.historyofinformation.com/detail.php?id=970:
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The LDX was a fax. The printer side was adapted to make the XGP. |
An XGP emulator is in development and various bits and pieces to use it is noted here: #2271 |
Tweets from Geoff Goodfellow: https://twitter.com/keyboardofGeoff/status/1753083975046922637
https://twitter.com/keyboardofGeoff/status/1753213478427677174
https://twitter.com/keyboardofGeoff/status/1753216297364828306
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A color photo of MIT's XGP. Source: https://www.computerhistory.org/collections/catalog/102803907 |
Hello @Rick-Shiffman, Please add your recollections of the ISI XGP to this issue. Thanks! |
Hi Lars, I remember looking at the insides of ISI's XGP. It had a one also if the XGP's PDP-11 crashed while the XGP was moving paper, then the XGP would dump Here's Robert Parker's description of the ISI XGP installed in 1974: |
Thanks Rick! |
A better photo from ISI. Source: https://twitter.com/Rrs86595671/status/1754564516669714755 |
SYSEN2; XGPDEV - device handler
SYSEN2; XGPSPL - unspooler
SYSDOC; XGP WRITUP
INFO; XGP 24
.INFO.; XGP WRITES
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