Alright,
I'm getting ready to make my 11/23+ available online for people to play
with, but I'm a bit stumped as far as how I should attach the serial
lines to my Ethernet network.
Now, I have a Sun server running Solaris 10 which I was able to connect
a couple serial lines to and then tunneled that through a telnet port,
but I'd rather not do that...with the setup I'm thinking of, we're
talking about a whole lot of cable running into that box.
Does anyone here have suggestions on what I should use for a terminal
server? If I could just mount a DECserver box in my PDP-11 chassis that
would be great, but isn't the Ethernet port DECnet-only?
I don't know what I'm doing when it comes to this, so feel free to
correct me.
As always, any help is appreciated
Julian
Not long ago, there was a discussion about the proliferation of reading
lamps that were powered from USB ports.
In the same vein, I give you:
http://www.thanko.jp/usbslippers/index.html
USB-powered slippers!
To make this on-topic, this would be a good thing with which to start your
USB classic peripherals collection...
Cheers,
Chuck
>From: "Chuck Guzis" <cclist at sydex.com>
>
>On 11/28/2005 at 11:21 PM Ethan Dicks wrote:
>
>>Dunno how much work it would be to make something like that for a WD
>>FDC-based machine, like a PeeCee.
>
>How about attaching the read data and index lines on the floppy drive on
>one machine to the FDC on another? Format the diskette and write the data
>to be transfered on a given track. Allow the other machine to read it.
>
>Klutzy, but it ought to work with very little in the way of extra logic.
>
>Cheers,
>Chuck
>
>
Hi
I was thinking that as well but you couldn't have any
of the special characters that are used to mark the various
fields. It would work if the files had ASCII text only but
many of the FxH values would do funny things( for your standard
controller chip, as I recall ) if the files had binary data.
Dwight
>From: "Allison" <ajp166 at bellatlantic.net>
>> From: woodelf <bfranchuk at jetnet.ab.ca>
---snip---
>
>>Did anybody ever use a serial chip and a data separater
>>rather than a floppy disk controler?
>
>Yes, many. usually its a sync chip.
>
>Allison
Hi
Besides the HeathKit hard sectored controller board,
used on both the H8 and the H89, Polymorphics also
used a serial chip to do data. In both of these
cases, as you state, they used synchronous serial
chips and not async.
Dwight
>
>Subject: Re: CP/M 2 - what's its legal status?
> From: "Chuck Guzis" <cclist at sydex.com>
> Date: Tue, 22 Nov 2005 21:37:58 -0800
> To: cctalk at classiccmp.org
>
>On 11/22/2005 at 9:18 PM Fred Cisin wrote:
>
>>... just to add to the bad news,...
>>I've seen numerous TM100-4M drives that were labelled TM100-4 !
>>So, a visual inspection may be inadequate to identify it.
>
>Vector Graphic was suprisingly stubborn about retaining the 100 tpi HS
>format long after it had become pass?. I've had HS 100 tpi diskettes
>from the Vector 4. I think Vector used some Micropolis drives and some
>Tandon. They may have also used some MPI drives in the 100 tpi format.
>
>What I can't explain are the small cables between the RAM cards in the
>middle of the card cage and whatever the cards are at the rear.
>
>Cheers,
>Chuck
Battery backup for the ram?
Allison
About 6 months ago, someone on the list contacted me about a 1700 spares. I
can't get to my archive for another couple of weeks. But I don't know where
a 1700 memory is and available at for price to be negotiated.
Could whoever was after this please get in touch with me off list and I'll
get the two of you together.
Billy Pettit
billy.pettit at wdc.com
>From: "Allison" <ajp166 at bellatlantic.net>
>
>>
>>Subject: Re: Pinout for SED9421
>> From: "Dwight K. Elvey" <dwight.elvey at amd.com>
>> Date: Mon, 28 Nov 2005 10:46:28 -0800 (PST)
>> To: cctalk at classiccmp.org
>>
>>>From: "Allison" <ajp166 at bellatlantic.net>
>>
>>>> From: woodelf <bfranchuk at jetnet.ab.ca>
>>---snip---
>>>
>>>>Did anybody ever use a serial chip and a data separater
>>>>rather than a floppy disk controler?
>>>
>>>Yes, many. usually its a sync chip.
>>>
>>>Allison
>>
>>Hi
>> Besides the HeathKit hard sectored controller board,
>>used on both the H8 and the H89, Polymorphics also
>>used a serial chip to do data. In both of these
>>cases, as you state, they used synchronous serial
>>chips and not async.
>
>Err, Yes that's what I did say. Sync chips were the norm
Hi Allison
I'm not contridicting, just pointing out some cases
to support. As I recall, the N* controller also used
the synchronous serial chip. I don't know of a case
that used a async part. All of these were used on
hard sectored disk.
I don't know of any soft sectored that used serial
chips. I suspect that it is because these depended
on using illegal data clocking sequences in order
to mark sectors. This would require more external
circuits.
Dwight
>for brewed designs there were not OSI or done with TTL.
>
>Often they were used because WD could not supply or was
>not viewed as the desireable item due to lack of second
>source (at least early on). Some did it to have a
>propritory format.
>
>
>Allison
>
>
>
>From: "Chuck Guzis" <cclist at sydex.com>
>
>On 11/28/2005 at 10:46 AM Dwight K. Elvey wrote:
>
>> Besides the HeathKit hard sectored controller board,
>>used on both the H8 and the H89, Polymorphics also
>>used a serial chip to do data. In both of these
>>cases, as you state, they used synchronous serial
>>chips and not async.
>
>To put a reverse twist on this, has anyone ever used two floppy controllers
>to transfer data between two systems? I know it'd take a little extra
>hardware (something has to provide address headers outside of a format
>operation), but it should still be quite possible to do so.
>
>I've never tried, however. Ethernet is so much easier.
>
>Cheers,
>Chuck
Hi
I've used slightly modified cassette tape software
to transfer data to and from a Poly88 to a PC. The only
part I recall changing was the initialization code and
the sync detect. They used a 8251 so there was little
other modifications. The Poly88 thought it was otherwise
just doing a tape transfer. I initialized the 8251
as async to match the PC end.
I suspect that one could do a controller to controller
method but one would need to generate the index pulses.
A simple 555 circuit would most likely be enough.
You might need to add a little analog filtering to
match up the compensation that is usually added to the
write data on the higher density drives.
Dwight
