the 8088 can support 64k ports, so logically the lower
16 address lines would be utilized to address them.
A16-19 were multiplexed with other pin functions. IIRC
the pc only allows for 256. Probably a good book on
the topic is Interfacing to the IBM PC by Eggebrecht
(Sams). Dont rely on that being the exact title or the
way the authors name is spelled. Chances are its
available on Amazonia for a song.
__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
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Hi,
My name is Francisco T?boas. I read that you have the operator manual for a
solartron 7150 multimeter.
Im very interested on having a copy of it. Do you know where I can find it?
Ade Vickers wrote:
> Currently, Egg are running a series of amusing UK comercials featuring a
> bunch of gerbils - some of whom are having financial problems.
>
> In order to help them out, Egg "give" the gerbils a computer(!) - which is
> clearly a stylised CBM Pet, albeit with the incongruous addition of a large
> trackball. Egg do, conversely, stick faithfully to the green-on-black
> display, even if their gerbil-scale Pet seems to exhibit better graphics
> resolution than the prototype...
>
> Cheers!
> Ade.
>
>
http://www.visit4info.com/moredetails.cfm?adnum=29668http://www.visit4info.com/moredetails.cfm?adnum=28418
has the ads... FYI - they are guinea pigs! :)
Cheers,
Bryan
>I don't understand how a receptacle can trip a circuit breaker. At worst,
>it would seem that it would fail to make contact or have high resistance
>contacts.
I don't understand the etiology of the problem myself, but that is what we heard back after the district sent in several electricians. Several possibilities: breakdown of insulation or impurities in insulation, mechanical failure due to stressed parts, or transmission error (district says: shoddy wiring, [they even used the] cheap plugs - the part in brackets gets dropped out, etc.)
Anyway, there is a very noticeable difference between the cheapie wiring supplies and the nicer "commercial grade" stuff, similar to the difference between a modern cheap PeeCee and a real computer.
Hi Guys,
Since you seem to be the ones who "didn't throw that stuff away", like me :-)
Thought you might like to look at this:
P.R.CRANE is a Computer Demolition Project that creates a PC-Controlled
Robot Crane.
You can control the crane manually with the arrow keys, have it learn a
series of steps, and create and edit a robot control program. P.R.CRANE is
made from an old IBM 5152 Graphics Printer, plus about $25 of parts
available at the hardware store and Radio Shack
You can find this at www.terryking.us (Hit the PARPORT button), and then
PRCrane is a one-liner near the top.
Somehow I think you'd also have an old DOS machine to run this... If not,
there are ways to force
XP to let go of it's IO-Priviledge compulsion...
Let me know if you get one of these running... I have some photos of kids
running these a few years ago.
Also: Anyone have an old XT that you want to know what to do with??? I have
an idea.
Regards, Terry King ...On The Mediterranean in Carthage
terry at terryking.us
Regards, Terry King ...On The Mediterranean in Carthage, Tunisia
terry at terryking.us
I'm looking to buy a Kyocera "Keytronics 85". This was the base model for
the Tandy Model 100 / Olivetta Model 10 / NEC PC-8201 portables from 1983.
I have the Tandy Model 100 but would prefer the Kyocera if anyone prefers to
trade.
Contact me OFF-LIST please. :)
-----------------------------------------
Evan Koblentz's personal homepage: http://www.snarc.net
Computer Collector Newsletter:
>> http://news.computercollector.com
Mid-Atlantic Retro Computing Hobbyists & Museum:
>> http://www.marchclub.org
>> http://groups.yahoo.com/group/midatlanticretro/
FYI
>Date: Sun, 19 Feb 2006 09:02:32 -0500
>From: ROBERT KRYL <r.kryl at worldnet.att.net>
>Subject: Commodore 64 free to a good home
>To: rigdonj at cfl.rr.com
>X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1409
>X-Mailer: Microsoft Outlook Express 6.00.2800.1409
>X-MSMail-priority: Normal
>Original-recipient: rfc822;rigdonj at cfl.rr.com
>
>Hello, Joe,
>
>We are moving from Delray Beach to Minnesota, and we must find a good home
>for a much loved Commodore 64 that has (I am told) virtually all the
>programs available, monitor, cpu---the works.
>
>We move next weekend, and finally my guy has agreed to leave it in Florida
>(between us we have three others!)
>
>If interested, pleas let me know asap! If you know someone else who is,
>please pass the word quickly! Thank you.
>
>Cherie cboen at charter.cnet
>
>They are--probably around $5 in single-unit quantities. I use one on my
>automatic dishwasher.
>
>It's the hospital-grade receptacles and plugs that are dear here. Aside
>from an additional endorsement and a different color, I don't know if they
>differ much from the ordinary consumer grade stuff.
>
>Cheers,
>Chuck
For anything except the most basic use, get the commercial grade. We had big problems at the computer lab at my school because the original electrician used the cheap receptacles, and they started tripping the breakers last year . . .
I think most of the plugs you can get are pretty well made, though. Expect to spend about $7-$10 for a grounding plug with screw terminals.
I tried to add the TU58 emulation (of Will Kranz) to my 11/34, but
it does not work. Here is what I have done so far.
I added an SLU/RTC (M7856) in the 11/34, and while I worked that out,
I added a M7856 page to my website. The intention is to use the added
DL11-W for a connection to the TU58 emulation on a (DOS) PC.
I configured the DL11-W to CSR 776500 and the vector to 300, for DD:.
LTC is disabled, as this is the second DL11-W in the system.
The first DL11-W is the system console port.
The serial TX and RX channel are set to 9600,N,8,1.
When I boot RT11 and enter .SH DEV the output shows that the DD driver
is installed and sitting at 776500, with vectors 300 and 304. When the
DL11-W is not installed in the system, RT11 reports DD not installed.
Next, I made a cable to connect the DL11-W to the serial port of the PC.
To check the cable between the PC and the M7856, I started Win98 and
used a terminal program. When I enter a character in the terminal app,
I can read that character in the RBUF (776502). When I deposit a value
in XBUF (776506), I see that character in the receive window of the
terminal application.
So, the cable is fine. BTW, I use only 3 wires: RxD, TxD, and Gnd ...
I boot the PC to DOS, actually Win98 command prompt, not to Win98 itself
and then starting a DOS box.
Then I run TU58.EXE, for example "TU58 -cTST58.TAP". TU58 seems happy,
it takes a second (to format the new "tape") and then reports to be
"waiting for a BREAK, or enter Escape to continue".
So, I enter ESC.
Now the TU58 emulation says that it is waiting for packets ...
I have RT11 running on the /34. Then I enter on the PDP-11 console
.DIR DD0:
Nothing happens, no output appears on the TU58 emulation on the PC.
RT11 seems to hang, at least when I enter text on the PDP-11 console,
that text is echoed on the VT102, but that's all!
Entering control-C prints ^C, but does not return me to the . prompt.
BTW, the TU58.INI file has these lines:
port 0
baud 9600,N,8,1
That means that I am not using interrupts (on the PC), but polling.
I assume that when you enter .DIR DD0: on the PDP-11 console, the TU58
emulation should at least print a "received packets", but nothing is
happening. BTW, I also tried with an "irq 4" line in the tu58.ini file,
but that gives the same results.
I have the feeling that I am overlooking something obvious, or doing
something stupid. Should there be some data (receiving packets from
the PDP-11) appearing in the TU58 emulation screen?
thanks,
- Henk, PA8PDP.
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Thank you for your cooperation.
> There's a 27C256 on it and a 20 MHz XCO and some assorted glue.
> The largest package is a Mitsubishi MN8601ME1, 64 pin "shrink DIP".
> Next to it is a MN8611A 42 pin "shrink DIP" and a QFP MN51040MGU,
> which I believe is a gate array.
> Does anyone have a clue as to what the heck this is?
Some Mitsubishi MCUs have 65C02 cores in them, do you have a dump of
the EPROM yet? The contents of that are probably your best clue.
Lee.
