Hello

I succeed to use SIGIL with original ultimate DOOM DOS on real old hardware with soundblaster AND MIDI out music.<
Thanks to ShadowHog, I found a modified version of the original DOOM.EXE that changes several game limits :
limit : old * k = new
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visplanes[MAXVISPLANES] : 128 * 8 = 1024
drawsegs[MAXDRAWSEGS] : 256 * 8 = 2048
SAVEGAMESIZE : 180224 * 16 = 2883584
activeplats[MAXPLATS] : 30 * 256 = 7680
vissprites[MAXVISSPRITE] : 128 * 8 = 1024
linespeciallist[MAXLINEANIMS] : 64 * 256 = 16384
openings[MAXOPENINGS] : 16384* 4 = 65536
-------------------------------------------------------

Now, Sigil is playable with vanilla DOOM
https://sourceforge.net/projects/prboom-plus/ … om-plus/1.92.2/

An other developper has modified this Doom+ exe to improve SIGIL compatibiliy :
https://www.doomworld.com/applications/core/i … nt.php?id=57087
The menu is expanded to include the 5th épisode.

Thanks for posting this! Wanted to try out Doom Plus after leileilol findings, but this is even easier. Running this with a SB16 fox FX and a GUS for music is really great. I do seem some drops in framerate in the more complex scenes, but no issues otherwise.