You can tell a lot of these brick games, such as the Pro 200
, were designed specifically for Tetris
because of their 10x20-cell dot matrix, which matches the size of the matrix in standard Tetris
. But I think a lot of them had to have their flagship game stripped out of later revisions after The Tetris Company started winning customs enforcement cases. The "2 in 1 Super Brickcal" in particular appears to be an exact copy of the Tetris Jr. keychain
with its distinctive 8x12-cell matrix.
Calculators use CORDIC
to make sine, cosine, logarithm, and exponent work on an architecture without even a multiply instruction. CORDIC was previously discussed in this topic
and this topic