Int 16/AH=2Bh

AH = 2Bh
AL = which key table to redefine
00h unshifted
01h shifted
02h Numlock
BH = standard scan code of key (00h-80h)
BL = new scan code

Desc: Redefine the generated scan code from BH to BL

See Also: AH=24h - AH=2Ah - AH=2Ch