Tetrisk
A 1994 MS-DOS block puzzle game written in assembly language.
MS-DOS May 1994
Tetrisk v1.0 draws in VGA mode 13h. Its graphics were painted as Deluxe Paint LBM files and packed into a single data file, TETRISK.V10, by a small C tool.

Every piece of the board is a tile from this sheet, along with the pointer and three sizes of score digits:

Its start-up memory check compares the free paragraph count as a signed number, so with more than 512 KB free it decides there is not enough. Past that check it stops the DOSBox build used by js-dos, so this one has no player yet.
Source 3 files
- TETMAK10.C C · 77 lines
- TETRISK1.A Assembly · 1370 lines
- TETRISK2.C C · 7 lines