Int 69 Fn FF  - 10net V5.0 - Syssvc.com - Signal System Error              [N]

   AH = FFh

Return: never???

Notes: displays "System Error" message and register dump, then halts system
   INT 69 is the default, and may be set to any interrupt from 60h-7Fh;
     the signature "SYSV" immediately before the interrupt handler serves
     as the installation check

See Also: AX=4001h,AH=49h