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DJGPP - Mapping small blocks of physmem beyond 1MB - __dpmi? (Developers)

posted by Japheth , Germany (South), 14.07.2011, 09:15

> __dpmi_physical_address_mapping() but I read this function has some
> limits like minimum size should be 4kB and in multiple of 4kB blocks

> BTW why __dpmi_physical_address_mapping() needs size
> paramerer at all?

Because it consumes resources - linear address space and physical memory for page table entries. The larger the size, the more of these resources are needed.

> I checked that meminfo.address didn't changed when I
> changed the size and call __dpmi_physical_address_mapping() again...

Perhaps this will change if you do call int 31h, ax=0501h ( allocate memory ) between those calls?

---
MS-DOS forever!

Complete thread:

• DJGPP - Mapping small blocks of physmem beyond 1MB - __dpmi? - RayeR, 13.07.2011, 14:58
  • DJGPP - Mapping small blocks of physmem beyond 1MB - __dpmi? - Japheth, 14.07.2011, 09:15
    • DJGPP - Mapping small blocks of physmem beyond 1MB - __dpmi? - RayeR, 14.07.2011, 15:09
      • DJGPP - Mapping small blocks of physmem beyond 1MB - __dpmi? - Laaca, 15.07.2011, 12:47
        • DJGPP - Mapping small blocks of physmem beyond 1MB - __dpmi? - RayeR, 17.07.2011, 02:06
          • DJGPP - Mapping small blocks of physmem beyond 1MB - __dpmi? - RayeR, 17.07.2011, 14:47
            • DJGPP - Mapping small blocks of physmem beyond 1MB - __dpmi? - RayeR, 02.08.2011, 13:08
              • DJGPP - Mapping small blocks of physmem beyond 1MB - __dpmi? - Rugxulo, 05.08.2011, 22:25
                • DJGPP - Mapping small blocks of physmem beyond 1MB - __dpmi? - RayeR, 06.08.2011, 11:56