Int 21 Fn 2538  P - Phar Lap 386/dos-ext Vmm V3.0 - Read Protmode Regs Af  [E]

   AX = 2538h
   DS:EBX -> buffer for registers (see AX=2528h)
   ECX = register record to retrieve
       00h first interrupt state
       01h next interrupt state
       EDX = handle for current interrupt state

Return: CF clear if successful
       DS:EBX buffer filled
       EDX = handle of current interrupt state
       ESI = number of interrupt which occurred
   CF set on error
       EAX = error code
       81h invalid handle in EDX
       83h register saving not enabled
       84h no more interrupt states

See Also: AX=2527h,AX=2528h