Hi guys,
Just a quick update regarding the disc reader project. I've added
sync-on-MFM-word to the microcode, and the software MFM decoder is working.
I got the first valid MFM decode using the "soft-PLL" decoder engine
about five minutes ago -- the first 16 bytes of an MS-DOS 5.0 boot
sector. I can see all the sector headers, address marks and pad bytes
displayed on the screen. "Just a bit" more than the PC disc controller
lets you see... :)
Now to find a disc with a slightly less ordinary format... perhaps a BBC
Micro (Acorn DFS) disc? My target is still an Amiga disk, if I can get
my hands on one with known contents.
More to come when I've had some sleep... I'll see if I can get some
photos of the hardware (and maybe schematics) uploaded in the next
couple of days.
Cheers,
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/
On 7 Dec 2009 at 21:37, Chuck Guzis wrote:
> My first instinct says "flyback transformer".
Which reminds me, if only I can get the flyback transformer fixed on my old Mac SE I could get it working again! But it's rather specialised I fear :-)
-cheers from Julz @P
Hi all. I got an email from the Computer History Museum (that's the BIG
one in California) ... says they're closing the main exhibit this month,
and it will re-open bigger and better toward the end of next year. So
now's a good time to go visit them before they redesign it.
I'm looking for information on the Excellon CNC-6 controller. I
believe this is a Z8000-based system from the 80's still in fairly
wide use. Mostly, I'm interested in general information regarding
details on the hardware.
If you can offer some illumination, please contact me off-list, if
you feel that this isn't appropriate for discussion (I've not seen
much mention of CNC controllers to date).
Thanks,
Chuck
Okay, this is the first time I've ever had to worry about this. When
is it to cold to run a computer? It's 35F out in the garage, and it
is supposed to get a lot colder tonight. I just shut the
dehumidifier down (to cold to run it) and setup a heater near the
computers (and other stuff I don't want to freeze).
Zane
--
| Zane H. Healy | UNIX Systems Administrator |
| healyzh at aracnet.com (primary) | OpenVMS Enthusiast |
| MONK::HEALYZH (DECnet) | Classic Computer Collector |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| PDP-10 Emulation and Zane's Computer Museum. |
| http://www.aracnet.com/~healyzh/ |
On 12/9/09, Sridhar Ayengar <ploopster at gmail.com> wrote:
> I know for a fact that there once was made a USB interface for
> non-Cardbus PCMCIA, because I have one. I would assume this card would
> Just Work(tm) in an ISA->PCMCIA adapter.
What's the vendor and part number? I once had a Dell Latitude LM I
bought new in 1996 that was running Solaris 7 or RedHat Linux
depending on what disk I had installed (I recently saw the Solaris 7
disk for it in my box of 2.5" IDE disks). The Dell FAQ at the time
said that there was no way to put a USB port on the machine (I think
it was one of the last name-brand laptops to not have that
capability). For machines of that era, a PCMCIA (not-Cardbus) USB
adapter would be perfect, depending on driver support (i.e. -
something more than Win95 or Win98).
I have some interesting machines, like a Planar-brand 486-based
"medical PC" that's sort of like a wall-mount tablet or laptop - no
batteries, but has a built-in LCD, PCMCIA, one ISA, *external* IDE
CD-ROM interface (DB-44HD), external floppy (DB-25), that could use a
USB 1.1 interface for either external storage or unusual HID goodies.
-ethan
Not too sure, but I remember reading an article about the IBM PS/2 model 25,
and how they had to sit and come to room temperature after being moved or
something would fry....
On Tue, Dec 8, 2009 at 11:19 PM, Zane H. Healy <healyzh at aracnet.com> wrote:
> Okay, this is the first time I've ever had to worry about this. When is it
> to cold to run a computer? It's 35F out in the garage, and it is supposed
> to get a lot colder tonight. I just shut the dehumidifier down (to cold to
> run it) and setup a heater near the computers (and other stuff I don't want
> to freeze).
>
> Zane
>
>
> --
> | Zane H. Healy | UNIX Systems Administrator |
> | healyzh at aracnet.com (primary) | OpenVMS Enthusiast |
> | MONK::HEALYZH (DECnet) | Classic Computer Collector |
> +----------------------------------+----------------------------+
> | Empire of the Petal Throne and Traveller Role Playing, |
> | PDP-10 Emulation and Zane's Computer Museum. |
> | http://www.aracnet.com/~healyzh/<http://www.aracnet.com/%7Ehealyzh/> |
>
I've been trying to find a chart of support hardware under the various
releases of DEC's ULTRIX flavor of UNIX, but am drawing a blank.
I have a couple of systems that came to me with versions of ULTRIX,
a MicroVAX II/GPX running v2.2, and a DECSystem 5400
(RISC-based) running v4.2 (I've since upgraded this to v4.5...thanks
Barry!)
So, I'm curious about which VAX and RISC systems were supported
by which versions of ULTRIX.
A lengthy Google search finally turned up a chart for VMS/OpenVMS at:
http://h71000.www7.hp.com/openvms/hw_supportchart.html
which is useful for the VMS side of things. Glad to have found it.
Can anyone point me to a similar reference related to ULTRIX?
-- Jared