I have a few questions:
1)
Does anyone have the voltage for the backlight on a Toshiba TLX-1342-G3B1
CGA LCD? It was pulled from a Tandy 1400HD laptop.
2)
Is there any way to connect a non-Apple monitor to the RGB port on an Apple
//c? It's a 15-pin connector, like a PC joystick/MIDI connector. Being a
15-pin connector, would a VGA monitor work with it? Or would it just need
to be a CGA, or would I just have to get an Apple monitor?
3)
I know it's pretty rare, but does anyone have an LCD panel for the //c?
ThAnX,
--
-Jason
(roblwill(a)usaor.net)
ICQ#-1730318
How about building an 'information appliance' toaster, like Microsoft
wants you to? For purely parody purposes, of course. Maybe I'll do
something like that.
Maybe it will have a network card, and I'll demonstrate toaster
operation with CGI scripting. And put up a toastercam. I'm not
kidding, this seems interesting...
>
>I don't count 'Insert VGA card tab 'A' into slot 'B'' as being
'building
>a computer'. When I talk about building a machine I mean from chips and
>wire and hand-etched (or wire-wrapped) boards.
>
>> If its a computer or controller (or something, haven't gotten around
to
>> laying out the ground rules yet) and you built it from the chip,
>> transistor or sand level, its admissable.
>
>I personally think that you should remember that when homebrewing was a
>lot more common (or was at least a larger part of home computing), a
lot
>of the projects were expansion cards for the Apple ][ etc. And that
there
>certainly should be a category for homebrewed cards in commerical
>machines.
>
>> > Does it have to be a complete machine, or will an add-on/interface
for a
>> > commercial computer count?
>>
>> Probably, but it would have to do something really cool! Like allow
you
>> to choose the speed on your blender from a radio-button on your
computer
>> or something.
>
>You mean a calculator with a colour video display and a robot arm
doesn't
>count? No I didn't homebrew the calculator, but everything else is
>mine.... Details available from HPCC if you're mad enough to want to
>build one...
>
>Seriously, I wasn't thinking of having the expansion cards in the same
>group as totally homebrewed machines (including the CPU). But as a lot
of
>'classic' homebrewing was interfacing, then it should be included
somehow.
>
>Perhaps have several categories. The ones off the top of my head are :
>
>Homebrew CPU - Anything where the CPU is not a standard commercial
>chip/machine. Homebuilt CPUs from relays, transistors, TTL, FPGAs, etc
>
>Homebrew microcomputer - Using a standard CPU chip (any), make a
computer
>not using standard PCBs. A general purpose machine which can run user
>programs, I think, though.
>
>Controller - a homebrew embedded control system using just about
anything...
>
>Interface - a homebrew expansion card/interface module for a (classic?)
>computer.
>
>Homebrew == built from chips/transistors/relays/valves. Not plugged
>together from standard boards...
>
>-tony
>
>
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
>Homebrewing is still going on. Its just not as prevalent any more because
>each year the art dies a little more.
I think the tales of homebrewing's demise are being a bit exaggerated.
Certainly, the character of homebrewing has changed greatly over
the past 20 years. It is true that some of today's tools of the trade -
for example, a good PAL/GAL programmer - are
more expensive than many of tools of 1975. But in real dollars,
today's $800 device programmer is much cheaper than, say, an 8080A
CPU, which had a street price of US$250 or so in 1975.
And many folks are doing very interesting things with programmable
devices. You can get into PIC programming for well under $100, and
there's lots of really interesting things you can do with that.
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology Voice: 301-767-5917
7328 Bradley Blvd Fax: 301-767-5927
Bethesda, MD, USA 20817
< Take a PIC17C42. This chip executes a respectable number of
< instructions/sec out of external memory. Link it up to some EPROMs - 16
< bits wide for the PIC instruction and enough extra bits to control the
< data path + rest of the homebrew processor. The PIC is not going to
I did that in 1980 using a 8048, slower but the same idea.
Allison
>Does anyone have really good references on learning basic computer
>design and implementation? To put things in perspective, right now
>I'm at a "Getting Started in Electronics" and "Introduction to Digital
>Electronics" Radio Shack level -- please hold back your laughter :)
The classic reference would be Don Lancaster's _TTL Cookbook_, which
is still being published in pretty much its original early-1970's
version.
For a slightly broader view of electronics - and a very solid
introduction to both digital and analog techniques - you'll
also want Horowitz and Hill's _The Art of Electronics_. Mr.
Transistor Man, here you come!
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology Voice: 301-767-5917
7328 Bradley Blvd Fax: 301-767-5927
Bethesda, MD, USA 20817
>hard to come by these days, but how about modern equivalents? I think
>that's the lowest level I'll personally go, although it would be really
>fun to build a 4-bit computer out of transistors, anything more complex
>is probably really difficult.
Why not go for a bit-serial (aka 1-bit) CPU? It's an extremely classic
design, and is certainly the way to go to minimize total transistor
count.
>I've got some plans of designing a computer this year. I'll probably
>get my feet wet with a simple 4-bit design, but I'd like to do a 12-bit
>computer (since my "inspiration" is a PDP-8).
The PDP-8/S is a -8 done in a bit-serial implementation. 78 microseconds
for some instructions!
If you don't mind making about a 15-year advance in the electronics
you'll be using, you might also seriously consider making a CPU via the
state machine route, using an EPROM and some counters. All math and logic
operations can very easily be done via table look-up in the EPROM. This
is a rather common assignment in lower-level computer engineering courses,
as it's something that can be easily wire-wrapped in an afternoon or two,
and it is extremely easy to try new microcode revisions.
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology Voice: 301-767-5917
7328 Bradley Blvd Fax: 301-767-5927
Bethesda, MD, USA 20817
My God... as little as six months ago, 11/44's seemed rare. Now it
seems like they're coming out of the woodwork!
Another free system over in Texas. Contact the fellow directly if
interested...
-=-=- <snip> -=-=-
On 2 Oct 1998 02:01:12 GMT, in alt.sys.pdp11 you wrote:
>>From: "Eric" <evb(a)citx.com>
>>Newsgroups: alt.sys.pdp11
>>Subject: pdp11/44 free to good home in TX
>>Date: 2 Oct 1998 02:01:12 GMT
>>Organization: http://www.supernews.com, The World's Usenet: Discussions Start Here
>>Lines: 13
>>Message-ID: <01bdeda9$0467a840$22a442c6(a)moonpie.citx.com>
>>NNTP-Posting-Host: 198.66.164.34
>>X-Trace: 907293672 0R4SAZH0CA422C642C usenet54.supernews.com
>>X-Complaints-To: newsabuse(a)supernews.com
>>X-Newsreader: Microsoft Internet News 4.70.1155
>>Path: blushng.jps.net!news.eli.net!spamkiller1.cwix.com!newsfeed.cwix.com!199.60.229.5!newsfeed.direct.ca!Supernews73!supernews.com!Supernews69!not-for-mail
>>
>>11/44 CPU
>>TS11 tape drive
>>(2) RK07 disk units
>>many rk07 packs
>>decwriterII
>>vt100 terminal
>>manuals, service history
>>unit operational at de-installation
>>deinstalled from a school
>>
>>30 days and it's going to the metal scrapyard, would rather see her have a
>>good home.
-=-=-=-=-=-=-=-=-
Bruce Lane, Owner and head honcho,
Blue Feather Technologies -- kyrrin (at) jps [dot] net
Web: http://table.jps.net/~kyrrin
"...No matter how we may wish otherwise, our science can only describe an object,
event, or living thing in our own human terms. It cannot possibly define any of them..."
< and peripherals together to make a (shudder) PC. I'm talking about
< *REAL* iron (or aluminum.) Starting from basic relay, transistor, or I
Lessee, I do much of my own bent metal, cases cost! I've been building
hardware for far to many years to count.
< (SSI or MSI only!) and rolling a machine the "hard way." Recreations o
Even the 8008 was considerd LSI!
< old machines (i.e. building your own PDP-1) would make a very
< interesting discussions.
Difficult as well as where down one get core these days?
I'd love to build a PDP-8 from the ground up using current (nonFPGA)
tech. For the moment I've building up a z80/s100 crate and doing a
z280s/CPM project for my self.
Allison
I was sort of interested but the shipping cost Vs what I have on hand was a
debate. I see by a recent posting he has had several offers. If he had
some unusual peripherals I would not have hesitated.
Thanks
Dan
-----Original Message-----
From: Bruce Lane <kyrrin(a)my-dejanews.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Saturday, October 03, 1998 1:08 AM
Subject: FW: pdp11/44 free to good home in TX
My God... as little as six months ago, 11/44's seemed rare. Now it
seems like they're coming out of the woodwork!
Another free system over in Texas. Contact the fellow directly if
interested...
-=-=- <snip> -=-=-
On 2 Oct 1998 02:01:12 GMT, in alt.sys.pdp11 you wrote:
>>From: "Eric" <evb(a)citx.com>
>>Newsgroups: alt.sys.pdp11
>>Subject: pdp11/44 free to good home in TX
>>Date: 2 Oct 1998 02:01:12 GMT
>>Organization: http://www.supernews.com, The World's Usenet: Discussions
Start Here
>>Lines: 13
>>Message-ID: <01bdeda9$0467a840$22a442c6(a)moonpie.citx.com>
>>NNTP-Posting-Host: 198.66.164.34
>>X-Trace: 907293672 0R4SAZH0CA422C642C usenet54.supernews.com
>>X-Complaints-To: newsabuse(a)supernews.com
>>X-Newsreader: Microsoft Internet News 4.70.1155
>>Path:
blushng.jps.net!news.eli.net!spamkiller1.cwix.com!newsfeed.cwix.com!199.60.2
29.5!newsfeed.direct.ca!Supernews73!supernews.com!Supernews69!not-for-mail
>>
>>11/44 CPU
>>TS11 tape drive
>>(2) RK07 disk units
>>many rk07 packs
>>decwriterII
>>vt100 terminal
>>manuals, service history
>>unit operational at de-installation
>>deinstalled from a school
>>
>>30 days and it's going to the metal scrapyard, would rather see her have a
>>good home.
-=-=-=-=-=-=-=-=-
Bruce Lane, Owner and head honcho,
Blue Feather Technologies -- kyrrin (at) jps [dot] net
Web: http://table.jps.net/~kyrrin
"...No matter how we may wish otherwise, our science can only describe an
object,
event, or living thing in our own human terms. It cannot possibly define any
of them..."
