INT 21,67 - Set Handle Count (DOS 3.3+)

AH = 67h

BX = new maximum open handles allowed

on return

CF = 0 if successful

= 1 if error

AX = error code if CF is set (see ~DOS ERROR CODES~)

- gives program control of the number of files simultaneously open

- if CX is less than the current number of open files the change

will take effect when the number of open handles falls below

the new limit

- this function allows the application to use more than 20 files,

up to the FILES=N limit

- earlier copies of IBM DOS 3.3 sometimes incorrectly allocates

memory (up to 64K) if an even number of handles is requested

- only the first 20 files handles are copied to a child process

regardless of the max number of files

- it is possible to allocate more than 255 file handles but it is

difficult to use more than 255

- see ~SFT~ ~FILE HANDLES~