Hi guys,
I've managed to get my grubby paws on a Seagate ST22R RLL controller,
and a matching ST-277R-1 hard drive (half-height 5.25in, 60MB ish). As
part of my "pre-installation research", I Googled the part number of the
one apparently-non-Seagate-custom part on the ST22R -- an Adaptec
AIC-010 RLL controller. Turns out the datasheet for this part is on
Bitsavers too.
The datasheet provides a decent overview of the on-disc format
(specifically: it's a tweaked variant of the IBM floppy disc low-level
format, sitting on top of (2,7)RLL). What it doesn't really cover is the
32-bit error-correction code and its polynomial. There is a slightly
oblique reference to Fire codes, there are two polynomials (forward and
reverse), and data is loaded in shift-register style.
Does anyone know what sort of error-correction codes were used on the
AIC-010 and AIC-100 controller chips, or the polynomials used?
Thanks,
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/
On Thu, Sep 30, 2010 at 10:37 PM, Zane H. Healy <healyzh at aracnet.com> wrote:
> At 9:44 PM -0700 9/30/10, Mark Davidson wrote:
>>
>> Ok, can't resist. ?I'm just so happy to have this machine!
>
> I don't blame you, I'm not into HP systems, but that's a seriously cool
> sounding system. ?I'd love to try MPE.
I have a special spot in my heart for HP3000 systems. MPE is a
seriously cool OS, and I attended UTC, home of the HP3000 mailing
list. My mother also worked at the university for 20+ years. I grew
up spending summers on the campus, in the library and in their
computer center, using their 3000 (and their 1000).
Mark
So now that I know that my recently restored Apple II is going to turn into dust in the not too distant future, how can It best be demonstrated to illustrate why it was so awesome back in '78? For example, with an Altair, you can either load Billy's Micro Soft Basic or play "Fool on the Hill" through your AM radio. But what application do you run on an Apple II that epitomizes Steve and The Woz's gift to man kind?
-Mardy
Hi all --
My club (MARCH) is scheduled to exhibit at the inaugural Maker Faire
NYC. I'm starting to have second thoughts because we don't "make"
anything, we just make old things work again. Who here has been to a
Maker Faire event, and if so, would a vintage computers exhibit be well
received by the audience?
