Date: Tue, 30 Sep 2008 03:48:31 +0000
From: Ethan Dicks <ethan.dicks at usap.gov>
Subject: Re: LED displays (TIL305, TIL308, etc.)
>I have one or two of a few different types, but no loose 9368s (only
>installed in boards already).
>One thought I had for trying to use a reduced-pin-count MCU-based numeric
>display was a 7447-type chip on 4-bits of an I/O port, and a 74145-type
>BSD decoder on the other half of the port - up to 10 digits easily, or 9
>with simple blanking (write 0 to the '145 and don't hang a digit off of it).
That's the way it was usually done, although depending on display size (current)
a '145 might not have enough oomph to drive the digits directly without a buffer.
I have a few 9368s if you're desperate; it decodes to hexadecimal (for common
cathode displays), whereas the 7446/7/8 displayed those odd symbols (and
blank for F of course).
I turned on my VT220 for the first time in nearly a year. The
screen says "VT220 Keyboard Error 4", all four green LED's (on the
top right of the keyboard) stay lit, and nothing appears on the
screen when I type.
Disconnecting and reconnecting the coiled-cord between the
keyboard and the terminal causes a cursor block to appear on the
screen, but the keyboard is still locked and the LEDs stay on.
Power-cycling the terminal shows the same error message.
However, the boot prompts from the 11/23+ are displayed normally,
so the receive part of the terminal at least is working.
Where should I start looking, before replacing the keyboard?
thanks for any hints
I also recall one of the magazines from the early days championing computer-readable strips printed in the magazine, similar to a UPC code but obviously much longer. Byte? Kilobaud? It's not coming up from long-term archive....
From: cctalk-bounces at classiccmp.org [cctalk-bounces at classiccmp.org] On Behalf Of Chuck Guzis [cclist at sydex.com]
Sent: Tuesday, September 30, 2008 4:39 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Vinyl Data- Classic Computers / Indie music tricks crossover
--- On Tue, 9/30/08, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
> Not the same thing, but I beleive that Elektor magazine sold vinyl
> records of programs for their computer projects (the TV games computer,
> Junior computer, SC/MP system, etc). These were programs only, no
> human-type music on the same disk.
In keeping with the spirit of this list, who's going to be the first
to encode CUTS data on a wax cylinder?
>> I have little experience with newer terminals, but the one I've wanted
>> for a while is a GiGi (VK100?).
> I had seen one of these when it first came out. I think we got a poor
> demo at the time from what I read of the specifications now.
> I picked up a couple of these from ebay recently.
Someone was looking for someone to dump the roms from a GIGI a few months ago.
My JrCaptain and its power supply (the wall wart) have become separated.
I'm pretty sure I still have it, it's just that I don't know which one
it is. Naturally none have the Tecmar name. I'm sure someone here has
one of these, so would you please look at the wall wart or power brick
and tell me what it says?
> I've been told using the compact Macs are an exercise in futility.
> But what about the Mac II's? (original II, IIx, IIfx, IIcx).
> I was just curious.
Right. For a pre-Mac II (e.g. Mac Plus), even Appletalk network file
sharing was an exercise in futility, let alone Ethernet. Until the
Quadras came along, an Ethernet interface was not built-in. You had
to buy a separate network card for you Mac II, and more likely than
not, it used "thin ethernet" (coax) not 10-base-T. I did use some 10-
base-T SCSI Ethernet adapters for non-expandable Mac laptops around
1975, but they were barely up-to-snuff.
While I was in grad school, from 1997 through 1999, I used a Quadra
700 running IE for browsing the web. It seemed unbearably slow even
then, and I think I switched to Netscape because its rendering engine
was more efficient (IE often had to redraw the whole web page twice--
e.g. to figure out how big the images were, and on a 68040 that was a
noticeable delay). Plus a lots of things have changed since then. I
don't think I even needed a Flash plugins at the time. Not that you
would even think of watching a YouTube video on a processor that
slow. For email I used GNU emacs RMAIL running on my group's Unix
server. I had to abandon it when MIME became the norm around 2000.
Bottom line: For small values of "access the internet" the older
Macs were serviceable. By modern standards, the old browsers are
curiosities at best. But if you need to transfer some old files off
your old Mac, the connectivity is there, and I have been grateful
that FTP still works even today.
I just had a bout with Colon Cancer and will have to start downsizing my
Computer collection which goes back to the early 80's got some S-100
stuff then PC's from the first thru XT, AT, 286, 386, 486's, 586, up to
I also have a complete IBM Series/! 110V half rack and full rack and
spare External floppy. Plus 4978, some 3101's some TI 810 printers
Cabling. Everything has to go. I also have a Pair of NEC APC's that run.
Got two old IMS 8000 8080 cabinets. Have some S-100 cards and 8"drives.
Got a Teletek Systemaster 65K CP/m SBC that used to work. even a boot
floppy and Docs.
THIS Has been sold
Got a Mariposa Design 64K Static Memory Board plus Manual.;
Even have a Tarbell SBC 8-16 that used to run Got all the Boots and Docs
Boy Am I Puter POOR. Got a N* Horizon and a ton of Cards thats up for Grabs.
Got a Cromemco ZPU and a 16K static card Plus an 8K ByteSaver fully
populated sans Proms.
Got a ADS Promblaster wating for one chip. Found one at Unicorn but need
to sell something to get the Bread to purchase
Got a Advanced Digital Corp S-100 MFM Controller but not sure of its
Got a Tarbell FDC 1011C and a 1011D Fully populated that ought to work
Got two Vector Graphic CPUs and a Z80
Got some spare Compu-Pro cards 8085, Disk1 that needs fixing, Disk3,
couple RAM22.s RAM17.s Interfacer 3 and 4 that I may put up if the
price is right
Looking for Shipping and Handling and a few Bucks to put my pocketbook
I'd go the E-Bay Route but they only allow Credit cards for PayPal and I
don't have one. I am strictly "Cash on the Barrel head" which includes
My E-Mail is good if anyone is interested.
I am located just NW of Milwaukee in Menomonee Falls right off of US
41-45 for PICK-UPS
I will be posting Vintage Computer Market Place and Comp.os.cpm and
Maybe even E-BAY
Bob in Wisconsin
I have a person whom was kind enough to post the PDF excerps from scanning "Practical Microprocessors"
which is the lab manual for the HP 5036 microprocessor trainer..
I scanned the schematics, rom listing and a few other pages.
You can find it on Dave's site here
be warned that in order to make it worth while to read its 125 megs I suggest that you print it out the 40 so pages.
I printed it to make sure that its readable. Spent a day to scan it and build the pdf so I hope those with the trainer
and have no manual will find it usefull.