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A comment on The DooM-chip: no CPU, no opcodes, no instruction counter.

Re:The DooM-chip: no CPU, no opcodes, no instruction counter by tyingq on Saturday May 09, 2020 @08:24AM (#23124161)
Interesting, so it's somewhat like the original pong chip or the AY-3-8500. No OS, just inputs drive video output.

http://www.pong-story.com/gi.htm

http://www.pong-story.com/gi8500.htm

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Re:The DooM-chip: no CPU, no opcodes, no instruction counter by userbinator on Saturday May 09, 2020 @04:18PM (#23127962)
Some of the ultra-cheap "battery portable handheld games" (https://en.wikipedia.org/wiki/Handheld_electronic_game ) which are still produced today may have such ASICs, although I suspect a lot of them are actually a 4 or 8-bit CPU with a mask ROM.
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Re:The DooM-chip: no CPU, no opcodes, no instruction counter by amelius on Saturday May 09, 2020 @08:26AM (#23124167)
Next: analog implementation of Doom?
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Re:The DooM-chip: no CPU, no opcodes, no instruction counter by djmips on Saturday May 09, 2020 @10:05AM (#23124782)
Not a finished one but this concept is cool. Doom on a Vectrex. https://www.youtube.com/watch?v=VuVnoqFF3II
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Re:The DooM-chip: no CPU, no opcodes, no instruction counter by MrBuddyCasino on Saturday May 09, 2020 @10:20AM (#23124902)
Sprite_tm! His hacks are always tasteful.
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Re:The DooM-chip: no CPU, no opcodes, no instruction counter by anthk on Saturday May 09, 2020 @11:37AM (#23125587)
The Vectrex had a 6809...
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Re:The DooM-chip: no CPU, no opcodes, no instruction counter by goldenkey on Saturday May 09, 2020 @10:03AM (#23124764)
Oscilloscope doom? I can dig it. Kinda like I dig this [1]

[1] https://www.youtube.com/watch?v=kPUdhm2VE-o

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Re:The DooM-chip: no CPU, no opcodes, no instruction counter by MayeulC on Saturday May 09, 2020 @07:17PM (#23129030)
I like this guy. I thought this was going to be a more introductory video: https://www.youtube.com/watch?v=rtR63-ecUNo (holy c*, he published a lot of these since 2014, they're pretty good :) )

This has been done with quake: https://www.youtube.com/watch?v=aMli33ornEU

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Re:The DooM-chip: no CPU, no opcodes, no instruction counter by goldenkey on Sunday May 10, 2020 @12:01AM (#23130186)
That is cool but I think what the OP meant by analog DOOM was actual analog circuits driving a TV PAL/NTSC signal or oscilloscope output.
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Re:The DooM-chip: no CPU, no opcodes, no instruction counter by mhh__ on Saturday May 09, 2020 @03:31PM (#23127633)
I guess you could synthesize a HDL implementation into discrete logic?
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