DOS ain't dead

AHCICD.SYS alternatives? (Users)

posted by RayeR , CZ, 21.01.2021, 02:13

> Ok, but don't forget that you have to provide physical addresses for the
> DMA engines.

Do all ATA commands over AHCI requires use DMA? E.g. ATA identify or read/write a single sector? On old (S)ATA there was choice to use DMA commands except e.g. TRIM that requres strictly DMA.

> I'm still wondering how the BIOS of my "AHCI only without IDP"-machine
> manages HD access in v86-mode. How does it access the HBA registers without
> using unreal mode? I cannot imagine that it uses Int 15h, ah=87h or VCPI.

Maybe some SMM magic? What transfer rate you got cca under DOS?

---
DOS gives me freedom to unlimited HW access.

Complete thread:

• AHCICD.SYS alternatives? - Japheth, 12.01.2021, 14:57
  • AHCICD.SYS alternatives? - mceric, 12.01.2021, 17:21
    • AHCICD.SYS alternatives? - tom, 12.01.2021, 19:22
      • AHCICD.SYS alternatives? - Khusraw, 13.01.2021, 09:32
        • AHCICD.SYS alternatives? - RayeR, 13.01.2021, 13:36
        • AHCICD.SYS alternatives? - tom, 13.01.2021, 23:22
        • AHCICD.SYS alternatives? - Japheth, 15.01.2021, 08:47
    • AHCICD.SYS alternatives? - Japheth, 12.01.2021, 20:31
  • AHCICD.SYS alternatives? - RayeR, 13.01.2021, 02:45
    • AHCICD.SYS alternatives? - Japheth, 13.01.2021, 04:52
      • AHCICD.SYS alternatives? - RayeR, 13.01.2021, 05:56
        • AHCICD.SYS alternatives? - RayeR, 13.01.2021, 13:44
      • AHCICD.SYS alternatives? - rr, 13.01.2021, 11:14
        • AHCICD.SYS alternatives? - Japheth, 13.01.2021, 13:43
          • AHCICD.SYS alternatives? - Laaca, 13.01.2021, 23:16
            • AHCICD.SYS alternatives? - Japheth, 14.01.2021, 04:54
  • AHCICD.SYS alternatives? - RayeR, 14.01.2021, 01:31
    • AHCICD.SYS alternatives? - Japheth, 14.01.2021, 04:48
      • AHCICD.SYS alternatives? - RayeR, 14.01.2021, 08:12
        • AHCICD.SYS alternatives? - Japheth, 14.01.2021, 10:08
          • AHCICD.SYS alternatives? - Japheth, 14.01.2021, 13:27
            • AHCICD.SYS alternatives? - Laaca, 14.01.2021, 17:05
              • AHCICD.SYS alternatives? - Japheth, 15.01.2021, 08:39
            • AHCICD.SYS alternatives? - RayeR, 16.01.2021, 02:51
              • AHCICD.SYS alternatives? - Japheth, 16.01.2021, 06:15
                • AHCICD.SYS alternatives? - RayeR, 20.01.2021, 15:40
                  • AHCICD.SYS alternatives? - Japheth, 20.01.2021, 20:45
                    • AHCICD.SYS alternatives? - RayeR, 21.01.2021, 02:13
                      • AHCICD.SYS alternatives? - Japheth, 21.01.2021, 02:55
                        • AHCICD.SYS alternatives? - Khusraw, 22.01.2021, 21:49
                          • AHCICD.SYS alternatives? - Japheth, 23.01.2021, 08:54
                        • AHCICD.SYS alternatives? - RayeR, 23.01.2021, 20:28
                          • AHCICD.SYS alternatives? - Japheth, 23.01.2021, 22:30
      • AHCICD.SYS alternatives? - rr, 14.01.2021, 14:41
        • AHCICD.SYS alternatives? - mceric, 14.01.2021, 17:30
          • AHCICD.SYS alternatives? - rr, 14.01.2021, 18:54
            • AHCICD.SYS alternatives? - RayeR, 14.01.2021, 21:31