obscure and ancient graphics card for IBM PC

I wrote a small C program for this graphics card.
It is a CGA model which was used in early 1980s!

After a while it really works.

A lot of effort is required to set a single pixel.
320x200 in 4 colors...

Borland C++ is used but this program is just plain C language.

Tables are used to set and reset the bit patterns.
For sure there are more efficient ways to set pixels on CGA adapters.

I wrote it just for fun. It is so old fashion, it needs DOS to work.

For demonstration, I draw 3 distinct color bars.

16 Kilobytes are used in CGA mode.
The card in my laptop has 16 Megabytes already.