FrenkelS

The color is changed by writing the new color to port 0x3d9. This works on a CGA card, but on a VGA card nothing happens. So when doomtd3 is run...

Take a look at [Squashware Doom ](https://github.com/fragglet/squashware). It has Console Doom levels

Text mode 40x25, like [FastDoom](https://www.youtube.com/watch?v=5j6Dn-UVQgY) is on the to-do list. As is using the less detailed maps of the Jaguar version of Doom.

Unplayable? Yet, there are speedruns: [1](https://www.youtube.com/watch?v=L4af2FoHsq8) [2](https://www.youtube.com/watch?v=RrQnRJ3KwNs) ;) It won't be much faster if every floor and every ceiling is black. The screen is already pretty small with just 60x128...

about 1/4 of the time is spent on the game logic and 3/4 on rendering

A quick test shows rendering 60x64 pixels instead of 60x128 increases the framerate by 1 frame.

Running timedemo 3 in 86box emulating a 286 at 25 Mhz: ``` 60x128 9 frames per second 60x 64 10 frames per second 30x128 12 frames per second 30x 64...

> Text mode 40x25, like [FastDoom](https://www.youtube.com/watch?v=5j6Dn-UVQgY) is on the to-do list. I'm working on a [stripped down version of Doom8088](https://github.com/FrenkelS/doomtd3) that just runs demo 3 as fast as it can....

> I wonder if something like a 8087 or a NEC v20 would help with running this on a 4.77 8088? (I’m not too sure about the technicals of either,...

80x25 and 40x25 16 color text modes have been implemented.