This is a long shot -- anyone have a spare "STP Connector Card" for a
VT103? This is a small paddle board that plugs into the main VT100
circuit board (on the J3 slot). Basically it re-routes the external
serial port internally in order to allow it to connect to the VT-103's
internal PDP-11.
It's a completely passive device and I have the schematic, PCB layout,
and pinouts so it's not looking like it would be too difficult to just
build one, but I figured I'd ask before I went through the effort.
(And for those interested, I'm finally doing something fun with the
VT-103 I got a few years ago. I've upgraded the backplane to 22 bits,
and I've installed a QED 993 board (a 3rd-party 11/93 clone with 4mb
memory onboard). Now I just need to work out the SLU connections for
the terminal itself (hence the STP connector) and work out some
storage... maybe I'll just borrow the SCSI card from my MicroVAX...)
Thanks as always,
Josh
Chuck said:
> Well, if you want "vintage" (and I assume you do) there was at least
> one such project in an old issue of Byte or Kilobaud (IIRC).
Wow, that takes me back. I built one back in late 1984 on a board to
fit into the expansion port of the C64. I believe it was Byte and I
believe the project was originally for the Apple II.
AFAIR
The board had 16 buffers on the address lines feeding two precision
resistor networks. One network for the lower 8 address lines connected
to the oscilloscope X input. The other network for the upper 8 address
lines fed the Y input. Giving you a 256 x 256 vector display of where
the processor was accessing memory.
I had a paying job to break software protection on some C64 games.
And this help alot to determine which parts of memory where pieces of
code were being stored.
For a while I toyed with the idea of writing a vector verse of Tic-Tac-Toe
by programatically putting jmp code pieces out in memory and jump from piece
to piece in a loop create the graphics on the oscilloscope.
--Doug Coward Poulsbo, WA
The new home of the
Analog Museum and History Center is
http://www.cowardstereoview.com/analog
On Thu, 8 Dec 2011, Bill Sudbrink wrote:
> Al Kossow wrote:
>> On 12/8/11 5:27 PM, Bill Sudbrink wrote:
>>> too expensive
>>
>> typical here.
>>
>> glad to see your time is worthless.
>
> Quite the contrary, I enjoy designing and constructing digital
> electronics. I consider it a pleasant use of my time.
Bill, are you planning on something similar to the ZVG or something more
complex? I'm going to need an X/Y driver myself here pretty soon. (I
also need to find a good 4" round vector tube...)
g.
--
Proud owner of F-15C 80-0007
http://www.f15sim.com - The only one of its kind.
http://www.diy-cockpits.org/coll - Go Collimated or Go Home.
Some people collect things for a hobby. Geeks collect hobbies.
ScarletDME - The red hot Data Management Environment
A Multi-Value database for the masses, not the classes.
http://www.scarletdme.org - Get it _today_!
Political correctness is a doctrine, fostered by a delusional, illogical
minority, and rabidly promoted by an unscrupulous mainstream media, which
holds forth the proposition that it is entirely possible to pick up a turd
by the clean end.
On the off chance somebody here has done this:
I have 2 wireless routers, one connects to cable and I have an internet connection. Its a wifi too.
I want to pick up that wireless signal with another router, locate it in the other part of the house to connect a wired ethernet device. its as if I want a wireless adapter, but not having an output that is usb, but a ethernet jack.
Is this possible?
Its to avoid running a long cat 5 cable thru the house.
Randy
On 12/8/11 4:47 PM, Bill Sudbrink wrote:
> Hi All,
>
> I'm thinking of building a "somewhat vintage" two-channel DAC board,
> intended to drive an oscilloscope as a vector display. I'm just considering
> parts now, unless someone has a really good design already set to build.
>
http://www.zektor.com/zvg/
Hi All,
I'm thinking of building a "somewhat vintage" two-channel DAC board,
intended to drive an oscilloscope as a vector display. I'm just considering
parts now, unless someone has a really good design already set to build.
By "somewhat vintage" what I mean is that I don't want to just drop in
a modern "super chip" that will have ten (or more) times the power of the
intended host computer which, by the way, is an SWTPc 6800. I figure the
board will have some 8-bit processor on it. I'm leaning towards a Z-80.
It will have an EPROM, some scratch static RAM, some glue logic to manage
the communication with the SS-30 bus... and this is where I get fuzzy... a
1Kx8 dual ported static RAM and two DACs. These last two elements (the
dual ported SRAM and the DACs) are where I don't have any experience. A
little googling has led me to the IDT7130 for the dual ported SRAM and the
DAC0830 for the DACs. Does anybody in cctalk land have experience with
either or both of these chips? I have a source for the DAC0830, but I don't
have a source for the IDT7130 yet. The basic idea of the design is for the
6800 to write a vertex list into the dual ported SRAM which the Z-80 then
reads and pushes to the DACs. I'm hoping I can just hang these chips off of
the Z-80 address and data busses like the RAM and EPROM but I need to do
some more reading of the spec sheets.
Any help greatly appreciated,
Bill S.
Does anyone have the "Unibug" ROM that was supplied with the TI
TM990/189 University Board? This was an educational and evaluation
board for the TMS9980 microprocessor, an 8-bit-bus version of the TMS9900.
It's not hard to find images of the "University BASIC" ROMs on the net.
Those ROMs replaced the Unibug ROM.
Thanks,
Eric
vintagecoder at aol.com wrote:
> I didn't know there was any non-magical way to convert Bookmanager
> to PDF. Are you saying you can do that?
I can work with DCF and Bookmaster _source_ documents, not compiled
binary Bookmanager, unfortunately.
> I certainly am, since I have and have access to a bunch of
> Bookmanager doc that is worthless on PCs although I love it on
> mainframes.
The comments I wrote yesterday (and posted to cctalk-request by
mistake) are about the import and export filters provided with Word,
WordPerfect, OpenOffice etc, not about DCF/Bookmaster, which really
live in another world. I'll post those comments shortly.
Bookmaster is pretty great, and it converts to DITA XML in a rather
straightforward way, which is no surprise since the latter is a direct
descendent of the former.
1978:
:note text='Warning'.
Don't run with scissors.
:enote.
2011:
<note type='warning'>
Don't run with scissors.
</note>
DCF (which is the IBM branch of the RUNOFF family tree, upon which
Bookmaster is based) is another story. In the hands of documentation
folks, it was a markup format. In the hands of engineers, it was a
programming language. When engineers wrote documentation, it was a
hairy mess. I've untangled some "interesting" DCF documents.
Brian
