Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

                                                     ◄Up► ◄Next► ◄Previous►
────────────────────────────────────────────────────────────────────────────
 
include vmm.inc
 
mov     esi, VM                         ; VM handle
mov     eax, [esi + CB_VM_Status]       ; virtual machine status
mov     eax, [esi + CB_High_Linear]     ; high linear address
mov     eax, [esi + CB_Client_Pointer]  ; points to a Client_Reg_Struc
mov     eax, [esi + CB_VMID]            ; virtual machine ID
 
The control block for a virtual machine contains information and status for
the virtual machine. Virtual devices can use the following symbols to access
useful fields in the control block:
 
Offset             Description
────────────────────────────────────────────────────────────────────────────
CB_VM_Status       Specifies the status for the virtual machine. It can be a
                   combination of the following values:
 
                   Value                   Meaning
                   ─────────────────────────────────────────────────────────
                   VMStat_Exclusive        Virtual machine is in exclusive
                                           mode.
 
                   VMStat_Background       Virtual machine runs in the
                                           background.
 
                   VMStat_Creating         Virtual machine is being
                                           created.
 
                   VMStat_Suspended        Virtual machine is not
                                           scheduled.
 
                   VMStat_Not_Executeable  Virtual machine is partially
                                           destroyed.
 
                   VMStat_PM_Exec          Virtual machine execution
                                           currently in a protected-mode
                                           application.
 
                   VMStat_PM_App           Virtual machine contains a
                                           protected-mode application.
 
                   VMStat_PM_Use32         Virtual machine contains a 32-bit
                                           protected-mode application.
 
                   VMStat_VxD_Exec         Virtual machine has received a
                                           call from a virtual device.
 
                   VMStat_High_Pri_Back    Virtual machine has high priority
                                           background execution.
 
                   VMStat_Blocked          Virtual machine is blocked on a
                                           semaphore.
 
                   VMStat_Awakening        Virtual machine is waking up
                                           after being blocked on a
                                           semaphore.
 
                   VMStat_PageableV86      Virtual machine has pageable V86
                                           memory (protected-mode
                                           application). The default
                                           behavior for one or more pages in
                                           V86 memory has been modified and
                                           the _GetV86PageableArray service
                                           returns at least one nonzero bit
                                           in the array.
 
                   VMStat_V86IntsLocked    Virtual machine locks any V86
                                           memory that is not pageable.
                                           Locking regardless of the pager
                                           type has been enabled for the
                                           virtual machine.
 
                   VMStat_TS_Sched         Virtual machine is scheduled by
                                           the time slicer.
 
                   VMStat_Idle             Virtual machine has released its
                                           time slice.
 
                   VMStat_Closing          Virtual machine has received a
                                           Close_VM message.
 
CB_High_Linear     Specifies the liner address in the VMM linear address
                   space of the virtual machine memory. Virtual devices can
                   add a V86 linear address to this value calculate the
                   location of a virtual machine memory in the VMM address
                   space.
 
CB_Client_Pointer  Specifies the address of a Client_Reg_Struc structure
                   containing the register values for the virtual machine.
 
CB_VMID            Specifies the virtual machine identifier.
 
See Also
 
Close_VM, Client_Reg_Struc
 
 
                                      ♦