BB> Hello Denis, been playing with your...
Hi Barry,
BB>;Assembly Language : Denis Boyles 08-Apr-97  1:153/290 :Subj : Bosskey.Asm
BB> ;----------------------------------------------------------------------
BB> ; This version is called SYSREQ.ASM
 BB> section 1 of 1 of file sysreq.zip  
Program received and decoded fine. Interesting, but it seems to crash more
than run a program. :( I either get a "memory allocation error" and it comes
back ok, or crash city.
It almost worked when I tried COMMAND.COM within MS Backup, until I EXITed
that is. C-R-A-S-H! :) I only took a glimpse at the code for now, just to
acknowledge that I recieved it.
I'll keep you informed of things when I go over it in more detailed. Until
then...
[Captains log, supplemental. :) you said it yourself in the code, INT 2E
 will destroy ALL registers except CS:IP. As such it's important so preserve
 them all, starting with CS:SS!. Screw up the stack, such as INT 2E does
 and C-R-A-S-H! :)
 Here's a start, the program when I added this during my MS Backup test. 
irst
 you'll need some extra variables in the TSR data section.
 _SS     dw ?    ;save the stack segment
 _SP     dw ?    ;save the stack pointer
 Then in the INT 2Eh call, add some wraparound code to save and then restore
 the stack registers.
 ie:
    ...
    push    CS
    pop     DS
    mov     [_SS],SS    ;save the stack regs prior to INT call
    mov     [_SP],SP
    int     2Eh         ;call command, stack regs are screwed
    push    CS
    pop     DS
    mov     SS,[_SS]    ;restore them back again
    mov     SP,[_SP]
    ...
 Another thing which seems to be a problem, is the "memory allocation error"
 thing. This seems the result of not enough memory to execute the command.
 Therefore some memory must be freed so the command can be executed. A
 harder task, when you're executing the command from within a program.
 Especially if that program is large itself! (I imagine some kind of swaping
 system would be in order)]
Kind Regards,
  Denis Boyles
... The OFFICIAL tagline of the 1996 Olympics!
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