Groups > comp.sys.ibm.ps2.hardware > #71533

Re: -TC on A30 Re: ABIOSDSK.386

From	"Josh Rodd" <joshua.at.rodd.dot.us@rodd.us>
Newsgroups	comp.sys.ibm.ps2.hardware
Subject	Re: -TC on A30 Re: ABIOSDSK.386
Date	2026-08-08 14:55 +0000
Organization	csiph.com Internet News Service
Message-ID	<6a774347.251dacdf204d68f6@csiph.com> (permalink)
References	<6a76990b.28d2603ac1f0639e@csiph.com> <11575uq$2sdl$1@csiph.com> <6a773cb4.7fdf0bb513b83fba@csiph.com> <1157fba$9q$1@csiph.com>

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Louis Ohland <ohland@charter.net> wrote:
> Looking at the DBA-ESDI header pin-out, A30 is -TC
> 
> Huh.

A34 is M/-IO, , but with only A0-A15, it wouldn't be able to be a memory
slave for anything other than 0-64K.

The DBA ESDI card (for the 50Z?) had ROM on it, probably for this exact
reason.

Note that if you design a CompactFlash, etc. adapter for this, as long
as it does translation to "speak" ESDI or MFM, the PS/2's BIOS will
support it. This would be harder than it sounds since that means DMA.

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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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