Thanks, Al, for the microcode rom dumps (however the 12823-80020.bin, F-SIS
is missing - lost somehow during copying?).
--
It should be there now
I've seen that the base ROMs slightly differ from the microcode listing in
the 2109-90004_1000EF_uPrgRef_Apr80.pdf from your site. What is the
relation between both sets?
--
The set that is up there was the last released set, and uses x8 proms instead
of x4. Release histories of the firmware can be found starting on page 33-1
of the CE manual.
I've hacked together a simple microcode disassembler for these ROMs, with the
exception of the 1816-* ROMs that I do not know how to handle (any further info?).
--
That is the MX IOP firmware. They are x4 parts (256x4, 82S129's to be exact)
I suspect Bob Supnik or Mike Gemeny may already have disassemblies of that.
On Nov 24, 12:45, Dwight K. Elvey wrote:
> >From: "Pete Turnbull" <pete(a)dunnington.u-net.com>
> >
> >On Nov 24, 9:08, Dwight K. Elvey wrote:
> >> Hi
> >> Pairs of switching power supplies often interreact to
> >> make a sound like hissing. There may not be anything
> >> wrong with it. Still the electrolytic leaking might
> >> be a problem.
> >
> >OfficeConnect hubs, switches, whatnots, are very small devices that
> >have an external wall-wart PSU and no fan, and are normally
absolutely
> >silent.
> >
>
> Ok, how about one of those little beeper/speakers? Does
> it have one of those? Otherwise, it is most likely an
> electrolytic.
Nope. Nothing at all that *ought* to make a noise :-)
--
Pete Peter Turnbull
Network Manager
University of York
>From: "Pete Turnbull" <pete(a)dunnington.u-net.com>
>
>On Nov 24, 9:08, Dwight K. Elvey wrote:
>> Hi
>> Pairs of switching power supplies often interreact to
>> make a sound like hissing. There may not be anything
>> wrong with it. Still the electrolytic leaking might
>> be a problem.
>
>OfficeConnect hubs, switches, whatnots, are very small devices that
>have an external wall-wart PSU and no fan, and are normally absolutely
>silent.
>
Ok, how about one of those little beeper/speakers? Does
it have one of those? Otherwise, it is most likely an
electrolytic.
Dwight
I wrote:
>The largest real Access system I ever owned/ran had 1 7920 and 3 7900s.
What
> is that, about 47MB. So two 2883s at about 25 MB each would just over the
>largest real system I ever ran.
Frank McConnell wrote:
>Hmm? A 7920 is 50MB, unless maybe TSB had trouble with that many bits on
>one device.
Yep, as I recall it was the limit of the ADT (Available Disk Table). I want
to say that the ADT was swapped in and out of core on a per-drive-basis as
needed. But the core allocated was only big enough to hold 32MEG worth of
available disk bits (per drive).
So, 3*5=15, 15+32=47
I?m just going on memory on all of this, and that?s been 20 years ago now.
Feel free to chime in here if my memory is not serving well enough.
Mike Gemeny.
I took a look at Paia's website, but it wasn't listed in the archives. You might want to go to www.paia.com and look for a phone number or email link. They like to hear from people with old Paia gear, and I'm sure there's someone there who will be able to tell you what it is.
Paul
ORIGINAL MESSAGE FOLLOWS:
I acquired a PAIA PVI-1 circuit board yesterday, and a Google search
brings up no information about this board. The main chip seems to be a
GI 2513 with some 8 7400 and CMOS support chips. On the circuit board
are two RCA jacks labeled TV and VID, two pots labeled "H POS V", a
jumper for selecting 32 or 64, and another YES or NO jumper for the
cursor. The code date on some of the chips are in the 1977 era. Does
anyone know what this thing is, and does anyone have any docs?
In the haul I picked up last week, one of the advertised VT-100s turned
out to be a VT-103 and I am beginning to suspect ... with John's help :)
... that the dual 8" RX02 drives go to this unit. No software but it
looks like an interesting find!
Hi
Pairs of switching power supplies often interreact to
make a sound like hissing. There may not be anything
wrong with it. Still the electrolytic leaking might
be a problem.
Dwight
>From: "Curt Vendel" <curt(a)atarimuseum.com>
>
>No fans.... Hmmmm, see its a design flaw ;-)
>
>
>Curt
>
>----- Original Message -----
>From: "Fred N. van Kempen" <waltje(a)pdp11.nl>
>> On Sun, 23 Nov 2003, Curt Vendel wrote:
>>
>> > Might be a fan has cracked a bearing, you should try using a wooden
>pencil
>> > or other non-conduct stick-like object and stop each of the fans and
>see if
>> > the noise stops, then you'll find the culprit.
>> OfficeConnect 8's dont have fans. They're little white boxes
>> with an external DC power supply (which, at least for the 240VAC
>> European version, sucks.) I assume it fried one or more of your
>> caps, probably the ones that try to flatten the voltage's curve :)
>>
>> "3Com - Just Say No!"
>>
>> --f
>>
>
>
Can someone point me at the requirements for running a version of RT-11
(like v4 or v5.3, v5.4) on a PDP-11/20. I'm pretty sure I can
get enough memory (in a BA11-K expansion chassis) but I want to know if
there are other "gotchas" (like having an EAE).
Also does anyone know where there is a reasonable copy of DOS/BATCH? I
tried an RK05 image that's around on the 'net on one of the simulators
and had little success. Did any version support RX01's?
Thanks.
--
TTFN - Guy
