DOS ain't dead - SATA - PATA, "native"

SATA - PATA, "native" - "legacy" (Announce)

posted by Japheth , Germany (South), 03.12.2007, 15:45

> But to be sure, how can I detect if INT13h services use DMA?

That's tricky. :-D

100% safe options are:

- reverse engineer BIOS
- write a JLM which traps IDE port access

Not 100% safe, but good guesses are:

- read the drive's config sector. There are some bits which tell if UDMA is activated and what UDMA mode is set.
- in v86-mode, the BIOS has to do VDS calls (int 4Bh) if it uses DMA, which can be trapped easily.

---
MS-DOS forever!

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Complete thread:

Jemm v5.68 - Japheth, 03.12.2007, 09:09 (Announce)
- Jemm v5.68 - RayeR, 03.12.2007, 11:51
  - SATA - PATA, "native" - "legacy" - Japheth, 03.12.2007, 13:00
    - SATA - PATA, "native" - "legacy" - RayeR, 03.12.2007, 13:22
      - SATA - PATA, "native" - "legacy" - rr, 03.12.2007, 13:57
        SATA - PATA, "native" - "legacy" - RayeR, 03.12.2007, 15:12
        SATA - PATA, "native" - "legacy" - Japheth, 03.12.2007, 15:45
        SATA - PATA, "native" - "legacy" - tom, 03.12.2007, 18:44
        SATA - PATA, "native" - "legacy" - Japheth, 03.12.2007, 18:57
      - SATA - PATA, "native" - "legacy" - Rugxulo, 04.12.2007, 09:43
      - SATA - PATA, "native" - "legacy" - RayeR, 05.12.2007, 03:29
        SATA - PATA, "native" - "legacy" - Japheth, 05.12.2007, 09:27
        SATA - PATA, "native" - "legacy" - RayeR, 05.12.2007, 20:59
        SATA - PATA, "native" - "legacy" - Laaca, 05.12.2007, 22:16
        SATA - PATA, "native" - "legacy" - Japheth, 05.12.2007, 23:04
        SATA - PATA, "native" - "legacy" - RayeR, 06.12.2007, 03:51
        SATA - PATA, "native" - "legacy" - Japheth, 06.12.2007, 07:35
        SATA - PATA, "native" - "legacy" - RayeR, 06.12.2007, 12:36
        SATA - PATA, "native" - "legacy" - rr, 06.12.2007, 17:42
        SATA - PATA, "native" - "legacy" - RayeR, 06.12.2007, 17:55
        SATA - PATA, "native" - "legacy" - rr, 07.12.2007, 09:48
        SATA - PATA, "native" - "legacy" - RayeR, 07.12.2007, 10:46
        SATA - PATA, "native" - "legacy" - Rob, 07.12.2007, 11:33
        SATA - PATA, "native" - "legacy" - Japheth, 07.12.2007, 12:15
        SATA - PATA, "native" - "legacy" - rr, 07.12.2007, 12:35
        SATA - PATA, "native" - "legacy" - Rob, 07.12.2007, 14:05
        SATA - PATA, "native" - "legacy" - tom, 07.12.2007, 14:58
        SATA - PATA, "native" - "legacy" - rr, 07.12.2007, 15:10
        SATA - PATA, "native" - "legacy" - tom, 07.12.2007, 15:20
        SATA - PATA, "native" - "legacy" - RayeR, 07.12.2007, 22:22
        SATA - PATA, "native" - "legacy" - Japheth, 07.12.2007, 15:00
        SATA - PATA, "native" - "legacy" - Rob, 07.12.2007, 17:48
        SATA - PATA, "native" - "legacy" - rr, 07.12.2007, 12:38
        SATA - PATA, "native" - "legacy" - RayeR, 18.12.2007, 02:03