INT 17 - PRINTER - WRITE CHARACTER
AH = 00h
AL = character to write
DX = printer number (00h-02h)
Return: AH = printer status
bit 7: not busy
6: acknowledge
5: out of paper
4: selected
3: I/O error
2: unused
1: unused
0: timeout
SeeAlso: AH=F1h,INT 16/AX=FFE3h,INT 1A/AH=11h"NEC"

See also: 1784

1700 - PRINTER - WRITE CHARACTER