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aap / pdp6

PDP-6 Emulator
MIT License
59 stars 9 forks source link

340 glitch running SPCWAR #10

Open larsbrinkhoff opened 5 years ago

larsbrinkhoff commented 5 years ago

Some kind of glitch that happens occasionally during an explosion. A wild vector running amok?

glitch

larsbrinkhoff commented 5 years ago

glitch2

larsbrinkhoff commented 5 years ago

This is another kind of glitch, but it was seen running the same SPCWAR.

This program has been running continuously a few days. It has been configured to only have one sun in the middle. It should be sparkling, but there are only a few dots displayed.

20190506_065536

larsbrinkhoff commented 5 years ago

I have seen something similar with 3406, where the rectangular cursor deteriorates into a few pixels.

aap commented 5 years ago

The display list must have been corrupted. That sounds kinda hard to find :/

larsbrinkhoff commented 5 years ago

I could accept that they, except for the cursor. The display list for the cursor is just a parameter word, two point mode words, and a character mode word. Since the intensity level and position is correct, the only thing that could be corrupted is the characters. But there's no character matching what I saw. I'll take a screenshot if I see it again.

Is it possible there's some data structure describing the screen pixels that can be corrupted?

larsbrinkhoff commented 5 years ago

Actual Type 30 screenshot. It looks similar to the above photo.