8-bit IDE

From: Chuck McManis <cmcmanis_at_mcmanis.com>
Date: Mon Apr 17 12:10:34 2000

I didn't follow this too closely but there were a couple of 8-bit IDE
interface boards in terms of "ISA 8 bit" vs "ISA 16 bit". JDR used to sell
one as an "upgrade" option for the XT and its ilk. However, it was only IDE
(no EIDE) and generally some BIOSes couldn't boot from it (it had BIOS boot
roms but not all systems (I think Leading Edge were a big problem here)
actually used them.)

Now as far as talking to a drive across the 40 pin cable in "8 bit mode",
that I've no clue on.

--Chuck

At 12:33 PM 4/17/00 -0400, you wrote:
>> an answer to the question I've put forth. The 8-bit interface feature is
>> written in the purported ANSI standard for ATA interfacing, yet nobody seems
>> to have experience with it. I was hopeful that someone would know about
>> this.
>
>Very simply. I tried that and it's bogus! It does not work. Therefor
>expereince with it is limited to trying to make it work.
>
>It may be proposed and would be nice but it's a no-op as far as I can test
>it.
>
>> features as shown in table 14.
>>
>> +=====+=============================================================+
>> | 01h | Enable 8-bit data transfers (see 6.2.5) |
>
>
>Allison
>
>
Received on Mon Apr 17 2000 - 12:10:34 BST