XGPSYN displays pages from .XGP files (as produced by PUB and POX), on the
video synthesizer. It can show half pages at high resolution, full pages
lying on their side at barely readable resolution, or two unreadable pages
side by side, with their large scale structure visible.

The video synthesizer is a video rate D/A driven by data disc channels 30
through 37. H density requires 3 of these channels, F needs 4 and D wants
5. These are rarely available during heavy system load. The program uses
about 7 seconds of CPU time to compose a single page.

To use it type R XGPSYN. ?<cr> will provide more info. comments to HPM.