Int 17 Fn 00  - Printer - Write Character                                  [B]

   AH = 00h
   AL = character to write
   DX = printer number (00h-02h)

Return: AH = printer status (see #0555)

See Also: AH=02h,AH=84h"AX",AX=6F02h,AH=F1h,INT 16/AX=FFE3h,INT 1A/AH=11h"NEC"

See Also: INT 4B/AH=00h,PORT 0278h"PRINTER",MEM 0040h:0008h,MEM 0040h:0078h

Bitfields for printer status:
Bit(s) Description (Table 0555)
 7 not busy
 6 acknowledge
 5 out of paper
 4 selected
 3 I/O error
 2-1   unused
 0 timeout

Note:  for Tandy 2000, bit 7 indicates printer-busy when set rather than clear