INT 21 - DoubleDOS - ADD CHARACTER TO KEYBOARD BUFFER OF CURRENT JOB
AH = F3h
AL = character
Return: AL = 00h successful
01h buffer full (128 characters)
SeeAlso: AH=F1h"DoubleDOS",AH=F2h"DoubleDOS"

See also: 21E3

21F3 - DoubleDOS - ADD CHARACTER TO KEYBOARD BUFFER OF CURRENT JOB