anyone else having trouble accessing bitsavers in the last couple of days?
transfers seem to be prone to massive slowdowns ( < 2KB/s ) from here (but
other sites are fine).
(I don't have Al's address handy or I'd ask direct if he's got some monster
update going on or something)
thanks
J.
Well, I got my 11/34 working, it comes up to a console and it all works
great.
I have a second M7800 card but I'm not real sure how to configure the
address and interrupt vectors on the card. I did figure out that:
A. I have the 4.608 mhz crystal, allowing me to do 9600 baud with it.
B. I removed the two caps that were in place according to the manual
"FOR 110 and 150 BAUD ONLY"
C. How to set the 9600 baud rate for both send and receive
D. How to set 1 stop bit, no parity, and 8 data bits.
So I'm good to go with it except for two problems:
1. When it is put in to replace the DL11-W (which would be much easier
to reconfigure later, what with its switches), it causes the machine to
halt at 173524 on powerup (this also happened before I removed the two
caps, so it's not that).
I just want to set this thing up as the serial console, for 9600, N/8/1.
Can someone help me out?
Thanks
Julian
>>A lot of RS422 equipment uses TTL level to create the +/- signal lines
>>- hooking it directly to RS232 may blow up your tranceivers, not work,
>>or both. Or, it may work - I think old Macs were tolerant enough to
>>do that.
>Yes, Macs with RS-422 ports usually could take RS-232 (using a converter
>cable) without a problem. I did this all the time.
SGI Indy/Indigo2 era machines have mini-DIN 8 serial ports that would do either depending on which device file you used, Sun machines (SS5 and U1, haven't poked around
in my Ultra 10 that much yet) had jumper-selectable RS232 or 422. I think DEC423 was very close to RS422, and there are few conversion problems there (reduced max cable
length, I think).
Hi,
Can anyone shed any light on these beasts? They,
apparently, are the only cards supported for use
with my Opus PM. Has that market become *so*
much of a commodity market that my chances of finding
one of these are slim-to-none? :-(
Thanks!
--don
I posted a couple of weeks ago that Spare Time Gizmos was planning a "last
buy" order for the SBC6120, a PDP-8 clone that you build yourself. To make
a long story short, we did find enough customers to go forward with the last
buy, and the chips and PC boards are here now. We'll start shipping them as
soon as the bus connectors arrive, which should be before the end of the
week.
Most of the last buy kits have already been sold, but there are enough
parts left over for about a dozen units. If you want one, then this is
your chance! You can order one here:
http://www.sparetimegizmos.com/Hardware/SBC6120-2.htm#Ordering
If you've never heard of it before, the SBC6120 is a PDP-8 clone,
including an optional front panel, that you build yourself
http://www.sparetimegizmos.com/Hardware/SBC6120-2.htmhttp://www.sparetimegizmos.com/Hardware/SBC6120_Front_Panel.htm
Thanks,
Bob Armstrong
All:
I'm working on re-archiving the CPMUG ARKives into ZIP files
and I've encountered a few files with filenames containing invalid
characters in DOS (primarily the "/" character). I can extract with
wildcards but the de-archiver (arce40g) doesn't seem to allow renaming
on extraction, so I can't extract and rename at the same time.
Any idea on how do accomplish this?
Rich
> From: Jules Richardson <julesrichardsonuk at yahoo.co.uk>
> I've got some equipment here that has RS422 serial on it - i.e. it uses
> differential signal pairs rather than RS232's reference against ground.
>
> Question is, can I wire up a cable so that I can use an RS232 terminal with
> this RS422 equipment? (running over a short distance)
A lot of RS422 equipment uses TTL level to create the +/- signal lines
- hooking it directly to RS232 may blow up your tranceivers, not work,
or both. Or, it may work - I think old Macs were tolerant enough to
do that.
The only "proper" way is to use a RS232 tranceiver chip (like MAX232)
and 422 tranceiver chips (such as 75176(? - it's been a while)) or a
creative arrangement of transistors and resistors.
I can send you a quick schematic if you need.
Joe.
Philip:
I just tired this method and it works pretty well. All you have
to do is replace "/" with "-" and it extracts fine.
Rich
-----Original Message-----
From: cctalk-bounces at classiccmp.org
[mailto:cctalk-bounces at classiccmp.org] On Behalf Of Philip Pemberton
Sent: Tuesday, June 27, 2006 8:29 AM
To: General at wolf.philpem.me.uk; On-Topic and Off-Topic Posts
Subject: Re: Uncrunching files with invalid characters
Cini, Richard wrote:
> I'm working on re-archiving the CPMUG ARKives into ZIP
files
> and I've encountered a few files with filenames containing invalid
> characters in DOS (primarily the "/" character). I can extract with
> wildcards but the de-archiver (arce40g) doesn't seem to allow renaming
> on extraction, so I can't extract and rename at the same time.
> Any idea on how do accomplish this?
How about hexediting the ARK files, or writing a little program to go
through
them, read in the filenames and make them DOS compatible?
I'd probably do the latter. I think the ARK format might be on
<http://www.wotsit.org/>.
--
Phil. | Kitsune: Acorn RiscPC SA202 64M+6G
ViewFinder
philpem at dsl.pipex.com | Cheetah: Athlon64 3200+ A8VDeluxeV2
512M+100G
http://www.philpem.me.uk/ | Tiger: Toshiba SatPro4600 Celeron700
256M+40G
I've done something similar and it worked fine. Back in the EARLY PC
days I was helping set up a company in Canada (Orlikon Aerospace) and we
had to post data from a Martin Marietta IBM system to a MicroVax. The
company in Canada was using a PC linked to the MicroVax to load the data
which had been send from MMC on a pile of 5 1/4" floppy disks. The company
in Canada could not get the data to transfer and I was there as a tech rep
and knew something about PCs so the job was dumped in my lap. Among other
problems, I found that their file transfer program crashed when it
encountered certain characters in the data from MMC. I ended up using
WordStar in a non-document mode to search for those characters and replace
them with Zs. I choose Zs since they were very uncommon in the data and
would be easy to find and correct once the data was in the MicroVAX. The
beauty of WordStar (besides being one of the FEW PC programs available in
that time and location) was that it will open ANY size or type file. At
that time the ONLY PC available was an early IBM XT with a 10 Mb hard
drive. I erased EVERYTHING off the harddrive even the OS and I was barely
able to sqeeze all the data onto it. I even ran WordStar from a floppy
disk. I took about 30 hours for WS to replace all of the invalid characters
but when it finished we were finally able to load everything into the
MicroVAX after 8 months of failed attempts.
Joe
At 08:46 AM 6/27/06 -0400, you wrote:
>Philip:
>
> I just tired this method and it works pretty well. All you have
>to do is replace "/" with "-" and it extracts fine.
>
>Rich
>
>-----Original Message-----
>From: cctalk-bounces at classiccmp.org
>[mailto:cctalk-bounces at classiccmp.org] On Behalf Of Philip Pemberton
>Sent: Tuesday, June 27, 2006 8:29 AM
>To: General at wolf.philpem.me.uk; On-Topic and Off-Topic Posts
>Subject: Re: Uncrunching files with invalid characters
>
>Cini, Richard wrote:
>> I'm working on re-archiving the CPMUG ARKives into ZIP
>files
>> and I've encountered a few files with filenames containing invalid
>> characters in DOS (primarily the "/" character). I can extract with
>> wildcards but the de-archiver (arce40g) doesn't seem to allow renaming
>> on extraction, so I can't extract and rename at the same time.
>> Any idea on how do accomplish this?
>
>How about hexediting the ARK files, or writing a little program to go
>through
>them, read in the filenames and make them DOS compatible?
>
>I'd probably do the latter. I think the ARK format might be on
><http://www.wotsit.org/>.
>
>--
>Phil. | Kitsune: Acorn RiscPC SA202 64M+6G
>ViewFinder
>philpem at dsl.pipex.com | Cheetah: Athlon64 3200+ A8VDeluxeV2
>512M+100G
>http://www.philpem.me.uk/ | Tiger: Toshiba SatPro4600 Celeron700
>256M+40G
>
All this talk about gold made me think of a recent purchase. I bought a
pair of VME wire-wrap boards with the intent of using them to make a
homebrewed CPU. Unfortunately they're too short my card cage (which is
220mm deep). These cards are 160mm deep.
Anyone interested?
--
David Griffith
dgriffi at cs.csubak.edu
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
