I know someone has made an ide hard card for the 8 bit apple 2 bus that takes
modern IDE drives, including the 1 inch notebook drives. I'm unclear how it
was done, but you can buy one at www.allelec.com/harddiap.htm .
>
> Well, I've got one drive, an ST351, I think it is, that responds to the
> 8-bit conditioning. It's a 1.25"-tall 3-1/2" drive, of 44 MB capacity.
> That's not what I want for the "hard-card" on the S-100.
>
> All your assertions about the relative folly of expending effort/resources
> to make the drive talk-8-bits wide has no real purpose except to bind it to
> its historical roots. I'd bet that the logic in the 1003-WAH uses the
> data-width bit to enable the IOCS16- signal and thereby lets the AT bus
> control whether the transfer is 8 or 16 bits wide, since the AT bus is
> required to do that.
>
> The early IDE drives made for COMPAQ by Seagate, were half-high 5-1/4"
> drives from which I've saved one or two of the PCB's. These have all the
> same logic on them that I recognize from the 1003-WA2 which is a WAH with
> the FDC missing, I think. Maybe it's the other way around . . .
>
> Those guys undoubtedly supported the 8-bit mode, since their host was, in
> some cases, an XT-class machine.
>
> Dick
>
> ----- Original Message -----
> From: allisonp <allisonp_at_world.std.com>
> To: <classiccmp_at_classiccmp.org>
> Sent: Monday, April 17, 2000 8:22 PM
> Subject: Re: 8-bit IDE
>
>
> > > "Has anyone got sufficient experience with the IDE in
> non-PC-compatible
> > >applications to say, unequivocally, whether the 8-bit operating mode
> > >described in section 6 of the standard for the ATA (IDE) interface, yes
> > >SPELLED OUT, actually exists in drives of the pre-1996 vintage?" It was
> > >dropped from the standard in 1996. There seem to be many folks with
> > >suggestions about how to implement this extremely elementary interface.
> > >There seem to be few who know whether the standard was every full
> > >implemented.
> >
> >
> > Why would they include that? NONE of the PC hardware they were intended
> > for wants to run as 8bit bus. Even the crippled SL/SLC run as 16bit
> busses.
> >
> > >Allison seems to be the only one who's tried this, and, I fear, it may be
> > in
> > >a PC-compatible, where all bets are off as to what really happens.
> >
> >
> > Obviously visually impaired! I don't hack IO in PCs nor have I tried that
> > yet.
> > I may add why even bother, IDE works there as is.
> >
> > ALL of the IDE work I've done was with 8085, z80s either stand alone
> > (bus less) or S100 Z80s. Further I'm currently working on a Z280 system
> > with IDE (Zbus 16bit). This is where I need interfaces and so I can
> replace
> > older MFM or non-existent hard disks. I currently have one S100 system
> > running a connor3044A (40mb) IDE that will be upgraded to a ST3250
> > (250mb) as it's a better drive.
> >
> > The drives I've tried include:
> >
> > Connor 2022
> > Connor 3044
> > WD2120
> > WD2420
> > St3096A
> > St3144A
> > St3250A
> > St3660
> > Fijitsu 528mb
> > Quantum LPS 80 and 120
> > Maxtor 124mb
> > and afew other sub 60mb WD, NEC, Seagate drives.
> >
> > I now have two 2.5mb IDE in the 700-800mb region I may try one day.
> >
> > I do have two WD PS/2m30 compatable 8bit IDE 20meg drives.
> >
> > I think this is a good cross section
> >
> > Allison
> > >
> > >Dick
> > >
> > >----- Original Message -----
> > >From: Mike Ford <mikeford_at_socal.rr.com>
> > >To: <classiccmp_at_classiccmp.org>
> > >Sent: Monday, April 17, 2000 7:22 PM
> > >Subject: Re: 8-bit IDE
> > >
> > >
> > >> I don't know a hoot about this, but I wonder if taking a look at the
> > >> Sequential Systems Focus card for the Apple II might be instuctive. Its
> a
> > >> controller and notebook IDE drive that all fits on a Apple II slot
> card.
> > >>
> > >>
> > >
> >
>
--
Jim Strickland
jim_at_DIESPAMMERSCUMcalico.litterbox.com
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Received on Tue Apr 18 2000 - 00:58:55 BST