HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

              INT 21,44,3 / IOCTL,3 - Write to Character Device

       AH = 44h
       AL = 03
       BX = handle
       CX = number of bytes to send
       DS:DX = pointer to data buffer

       on return
       AX = number of bytes written if CF clear
          = error code if CF set   (see DOS ERROR CODES)

       - see bit 14 if IOCTL function 00h to determine if
         driver can support IOCTL control strings

Esc or Alt-X to exit int 21,44,3 Home/PgUp/PgDn/End ←↑↓→
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