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Groups > comp.sys.ibm.ps2.hardware > #71522

Re: W95 and SCSI

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Aha... I recall those drivers now, and they are state of the art.

Was there ever an ABIOS disk driver for Windows 95? I know NT had one,
called, well, ABIOSDSK.SYS.

ABIOSDSK.386 should not be considered to be "high performance" just yet.
It does its fair share of double buffering to avoid the pitfalls of DMA.

Louis Ohland <ohland@charter.net> wrote:
> Unal Z and WBST snuck out for some really good smokes. They aren't 
> taking any text messages.
> 
> https://ardent-tool.com/utils/#Win_Utils
> 
> SPOCK206.ZIP SPOCK206 Driver for Windows 95/98 by Unal Z (info)
> https://ardent-tool.com/IBM_SCSI/spock206.html
> 
> SPOCK2NT.ZIP SPOCK206 Driver for Windows NT by Unal Z (info)
> https://ardent-tool.com/IBM_SCSI/spock206.html
> 
> AHA206.ZIP AHA-1640 Windows 95/98 driver by Unal Z (info)
> https://ardent-tool.com/SCSI/aha206.html
> 
> Josh Rodd wrote:
> > Presenting ABIOSDSK.386: 32-bit disk access finally gets here for your
> > PS/2 with gigantic, clanking MFM drives and irreplaceable ESDI drives.
> > 
> > This has been about 35 years in coming, ever since as a sprightly 11
> > year old I was miffed that my fancy PS/2 P70 just wouldn't let me click
> > the "32-bit Disk Access", despite me barely understanding what was even
> > for. Of course, we now know that that means you can do things like open
> > a couple DOS windows on your 2MB machine and listen to the fixed disk
> > (or, more likely, a hard drive, since this wasn't happening on real IBM
> > computers with real IBM fixed disk adapters/A) thrash like crazy.
> > 
> > Nonetheless, here it is. It is based on IBM2ADSK.ADD from the OS/2 DDK
> > and WDCTRL from the Windows 3.1 DDK. So far, testing has been really
> > thorough: I tested it on 86Box with a Type 2 Model 80, ESDI adapter
> > card, PC DOS 3.30, 4MB and 2MB configurations, Windows 3.1. A test suite
> > program is included which tries to really exercise the disk and get
> > Windows' multitasking really crankin' with a couple DOS windows open.
> > 
> > Download it for yourself at:
> > https://github.com/sbooks-org/ABIOSDSK386
> > Direct link for 720kB floppy image, because how else would you get it on
> > your PS/2?
> > https://github.com/sbooks-org/ABIOSDSK386/releases/download/v0.90/ABIOSDSK.IMG
> > 
> > No warranty is implied, particularly given this is the kind of code
> > whose failure mode will mean you get to reformat your fixed disk and
> > reinstall everything.
> > 
> > I plan to do SCSI support next (it's easier than it sounds; it's just
> > another ABIOS interface). Can someone remind me what the state of
> > Windows 95 support for ABIOS disk adapters (MFM, ESDI, etc.) and the
> > PS/2 SCSI adapter is?
> > 

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Thread

ABIOSDSK.386: 32-bit disk access for your PS/2's MFM and ESDI drives "Josh Rodd" <joshua.at.rodd.dot.us@rodd.us> - 2026-08-08 02:48 +0000
  W95 and SCSI Louis Ohland <ohland@charter.net> - 2026-08-07 22:06 -0500
    Re: W95 and SCSI "Josh Rodd" <joshua.at.rodd.dot.us@rodd.us> - 2026-08-08 03:10 +0000
      Re: W95 and SCSI Louis Ohland <ohland@charter.net> - 2026-08-07 22:33 -0500
        Re: W95 and SCSI "Josh Rodd" <joshua.at.rodd.dot.us@rodd.us> - 2026-08-08 14:33 +0000
  FD had 32-bit BDA? Louis Ohland <ohland@charter.net> - 2026-08-07 22:08 -0500
    Re: FD had 32-bit BDA? "Josh Rodd" <joshua.at.rodd.dot.us@rodd.us> - 2026-08-08 03:11 +0000
    Re: FD had 32-bit BDA? "Josh Rodd" <joshua.at.rodd.dot.us@rodd.us> - 2026-08-08 03:12 +0000
  These are not the hard drives you are looking for Re: ABIOSDSK.386 Louis Ohland <ohland@charter.net> - 2026-08-08 07:03 -0500
    Re: These are not the hard drives you are looking for Re: ABIOSDSK.386 "Josh Rodd" <joshua.at.rodd.dot.us@rodd.us> - 2026-08-08 14:27 +0000
      -TC on A30 Re: ABIOSDSK.386 Louis Ohland <ohland@charter.net> - 2026-08-08 09:44 -0500
        Re: -TC on A30 Re: ABIOSDSK.386 "Josh Rodd" <joshua.at.rodd.dot.us@rodd.us> - 2026-08-08 14:55 +0000

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