reb2@ihlpa.UUCP (Brown) (11/20/86)
*** REPLACE THIS LINE WITH YOUR MESSAGE *** This goes along with my previous posting regarding Ctl-C and Ctl-Break. I am trying to write a resident program that would get control after a program terminates, before going back to the DOS prompt. I have been able to do this for programs which terminate by issuing interrupts, such as INT20h and INT21h func. 4Ch. But none of these seem to catch a program which terminates by pressing Control-Break. For example, if a sample program issues a INT16h with AX=0, which results in waiting for a key to be struck, if I press Control-Break, the program terminates without, as far as I can tell, and interrupt such as INT20h. Does anyone know how to trap the above termination condition? Thanks, Rick Brown ihnp4!ihlpa!reb2
mmm@nbires.UUCP (Michelle Melvin) (11/24/86)
The control C handler address is at INT 23h. There are also serveral
addresses stored in the programs PSP. If you spawn a program without
executing it, you can modify the terminate address, control c address
and hard error address. Once the modifications have been made you can
then let the program execute. When the program terminates, dos returns
control to these addresses. This is a much easier method of traping
program termination then traping the interupt.
Anyway, I wrote a structure of the contents of the PSP. If there is
enough interest, I will post it.
Lloyd W. Tabb
NBI Engineering
{hao,allegra,ucbvax}!nbires!mmm
(303)-938-9258