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Printing
Similar to the Knight TV display system, the XGP printer needs a PDP-11—called the XGP-11—to drive it. The XGP-11 is connected to a KA10 over the Rubin 10-11 interface. The pdp10-ka emulator supports this, and there is an xgp11 emulator to go with it.
To print something, the XGP-11 needs to run its software. When both computers are started, log in and type :STUFF XGP on ITS. This will transfer the XGP-11 software and start it. Next, the XGP unspooler needs to run. To start it, you must log in as the XGP user and then run the XGPSPL program. The program runs in the foreground, so leave that terminal alone.
To start a print job, use the :XGP command, passing a file name on the command line. XGPSPL will take notice, and you should see that it prints a line. You can also check the status of the XGP and the print queue by making a file listing of the XGP device. E.g. type XGP^F or :LISTF XGP:.
The XGP-11 will receive print data from XGPSPL and print it on paper. The emulator generates PNG files for each page in the same directory it was started from.
An active print job can be aborted by typing ^G to XGPSPL.
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