INT 33 - Switch-It v3.23 - GET CONFIGURATION FILE AX = FFF1h Return: BX:AX -> ASCIZA NUL-terminated ASCII string. The ASCIZ string "ABC" consists of the four bytes 41h, 42h, 43h, and 00h. Unless otherwise specified, maximum lengths given in the interrupt list do not include the terminating NUL. pathname of configuration file Program: Switch-It is a task switcher supporting up to 100 programs simultaneously by Better Software Technology, Inc.