DOS ain't dead

UIDE and AHCI support (Miscellaneous)

posted by Jack , Fresno, California USA, 26.05.2010, 19:36

> Jack,
> what is the possibility for, or status on adding AHCI support to the UIDE
> driver? Is it technically feasible? I enable AHCI on all machines I
> reimage, and often run DOS diagnostics on the same machines. AHCI
> support would of course mean that I don't need to switch controller modes
> for DOS/UIDE and then remember to switch back again for Windows.

Of course I could add AHCI to UIDE -- if I wanted to buy a new system, with
an AHCI mainboard. But in fact I do NOT! NOBODY yet has noted that AHCI
gains ANYTHING in speed/performance and likely IT NEVER WILL, as that would
require something called a "driver" to be written by "Gates & Co."!! Does
the expression "Good LUCK, Sucker!!" mean anything to you??!!

AHCI's "selling point" is being able to "chain" disk commands and demand no
software handling in-between disk transfers. That is for an "asynchronous
I-O" system like Windows/Unix, NOT for DOS which does one at a time I-O and
CANNOT indicate which of MULTIPLE transfers are COMPLETED, on an interrupt!
So, DOS cannot use "actual" AHCI, and I see NO reason to write 500 bytes of
AHCI run-time logic, plus up to 1000 more of AHCI initialization, into UIDE
only to avoid "switching modes" on DOS/Windows systems. A rather POOR use
of my time!

I suggest you simply keep your DOS/Windows systems in "compatibility" or in
"legacy IDE" mode, whatever the BIOS guys call it "today"! And I will bet
you lose LITTLE speed/performance, not before "Gates & Co." at-LAST "figger
out" a disk driver WORTH enabling AHCI!! To my knowledge, they still have
NO decent disk driver for SATA/IDE -- Lucho noted to me in 2008, re: UIDE's
performance v.s. Windows "You beat THEM, three MONTHS ago!!" -- and I would
NOT "hold your breath!!" for a decent Windows AHCI driver, either!!

---
(Account disabled on user's request.)

Complete thread:

• UIDE and AHCI support - Drewfus, 26.05.2010, 01:09 (Miscellaneous)
  • UIDE and AHCI support - Laaca, 26.05.2010, 09:22
    • UIDE and AHCI support - roytam, 26.05.2010, 12:58
      • UIDE and AHCI support - RayeR, 26.05.2010, 13:18
        • UIDE and AHCI support - Drewfus, 27.05.2010, 14:14
          • UIDE and AHCI support - RayeR, 27.05.2010, 19:23
  • UIDE and AHCI support - Jack, 26.05.2010, 19:36
    • UIDE and AHCI support - RayeR, 27.05.2010, 10:05
    • UIDE and AHCI support - Drewfus, 27.05.2010, 14:10
      • UIDE and AHCI support - Jack, 27.05.2010, 17:10
        • UIDE and AHCI support - Drewfus, 27.05.2010, 17:52
          • UIDE and AHCI support - Jack, 27.05.2010, 21:34
            • UIDE and AHCI support - Drewfus, 28.05.2010, 02:44
              • UIDE and AHCI support - DOSferatu, 01.06.2010, 16:05
                • UIDE and AHCI support - tom, 01.06.2010, 16:14
                  • UIDE and AHCI support - DOSferatu, 01.06.2010, 23:50
                  • UIDE and AHCI support - Drewfus, 02.06.2010, 02:47
                • UIDE and AHCI support - Drewfus, 02.06.2010, 02:44
                  • UIDE and AHCI support - DOSferatu, 02.06.2010, 16:54
                    • UIDE and AHCI support - RayeR, 03.06.2010, 00:47
                      • UIDE and AHCI support - DOSferatu, 03.06.2010, 19:23
                        • UIDE and AHCI support - DOSferatu, 08.06.2010, 23:41
                          • UIDE and AHCI support - RayeR, 12.06.2010, 13:27
        • UIDE and AHCI support - yuhongbao, 04.10.2010, 03:51