DOS ain't dead - For Rayer - shared resources between DOS and WinXP

For Rayer - shared resources between DOS and WinXP (Announce)

posted by Japheth , Germany (South), 17.07.2008, 08:20

> > Usually, inside the VDD, if you got addresses
> > from the DOS app, you will translate them by a call of VdmMapFlat() -
> this
> > call translates SEGMENT:OFFSET or SELECTOR:OFFSET into FLAT.
>
> If I would forward SELECTOR:OFFSET to VDD how it can translate it? It
> should neeed to look-up to LDT od my DJGPP program first for base of the
> selector's descriptor - do it automatically?

Yes, of course. The LDT is not a part of your program.

> Unforetunatelly I'm stucked with compiling vdd sample code in mingw and
> don't have much free time to messing with it now.
>
> And please, do you have a complette prototype of VdmMapFlat?
> PVOID VdmMapFlat(IN WORD Segment, IN ULONG Offset, IN VDM_MODE Mode);
>
> What type is VDM_MODE and what is VDM_PM, VDM_V86 valuses? I cannot find
> it in any .h either on google.

the VDM stuff is included in Win2k/WinXP ddk, there's a help file, include files (vddsvc.h, nt_vdd.h, isvbop.h) and an import lib (ntvdm.lib).

> And the VdmMapFlat() can be called only after registering vdd? If I tried
> to call it in stand-alone exe it returns A0000 for A000,0,0 input instead
> null.

Looks ok to me. A000,0,0 means segment=A000, offset=0, pmode=FALSE, that should return linear address A0000.

---
MS-DOS forever!

Post reply

Complete thread:

For Rayer - shared resources between DOS and WinXP - Laaca, 05.07.2008, 10:08 (Announce)
- For Rayer - shared resources between DOS and WinXP - Japheth, 05.07.2008, 11:27
  - For Rayer - shared resources between DOS and WinXP - RayeR, 06.07.2008, 13:26
    - For Rayer - shared resources between DOS and WinXP - Japheth, 07.07.2008, 09:19
      - For Rayer - shared resources between DOS and WinXP - RayeR, 08.07.2008, 14:02
        For Rayer - shared resources between DOS and WinXP - Japheth, 08.07.2008, 17:08
        For Rayer - shared resources between DOS and WinXP - RayeR, 11.07.2008, 02:53
        For Rayer - shared resources between DOS and WinXP - Japheth, 11.07.2008, 09:30
        For Rayer - shared resources between DOS and WinXP - RayeR, 11.07.2008, 11:18
        For Rayer - shared resources between DOS and WinXP - Japheth, 11.07.2008, 11:38
        For Rayer - shared resources between DOS and WinXP - RayeR, 11.07.2008, 14:12
        For Rayer - shared resources between DOS and WinXP - Japheth, 11.07.2008, 20:39
        For Rayer - shared resources between DOS and WinXP - RayeR, 16.07.2008, 15:51
        For Rayer - shared resources between DOS and WinXP - Japheth, 17.07.2008, 08:20
        For Rayer - shared resources between DOS and WinXP - RayeR, 17.07.2008, 12:25
        For Rayer - shared resources between DOS and WinXP - Japheth, 17.07.2008, 13:38
        For Rayer - shared resources between DOS and WinXP - RayeR, 17.07.2008, 14:05
        For Rayer - shared resources between DOS and WinXP - Rugxulo, 17.07.2008, 14:35
        For Rayer - shared resources between DOS and WinXP - RayeR, 17.07.2008, 18:55
        For Rayer - shared resources between DOS and WinXP - Rugxulo, 18.07.2008, 13:50
        For Rayer - shared resources between DOS and WinXP - RayeR, 22.07.2008, 10:24
        For Rayer - shared resources between DOS and WinXP - Rugxulo, 23.07.2008, 00:51
        For Rayer - shared resources between DOS and WinXP - RayeR, 23.07.2008, 16:56
        For Rayer - shared resources between DOS and WinXP - Rugxulo, 24.07.2008, 07:06
        For Rayer - shared resources between DOS and WinXP - Rugxulo, 23.07.2008, 01:00
- For Rayer - shared resources between DOS and WinXP - RayeR, 11.07.2008, 23:04
  - For Rayer - shared resources between DOS and WinXP - RayeR, 11.07.2008, 23:19
- For Rayer - shared resources between DOS and WinXP - ho1459, 13.07.2008, 08:40