On 2016-Aug-04, at 11:46 PM, Brad H wrote:
> Dave
> Yes.. I tried 7 bits.. different parity settings, speeds etc. Couldn't quite
> nail it down. In every tutorial online for the 6800 being used with PC
> terminal, they go 8 N 1.. nobody mentions specifically if you are supposed to
> use hardwa
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Brad H
> Sent: 05 August 2016 07:46
> To: General Discussion: On-Topic and Off-Topic Posts
>
> Subject: RE: SWTPC 6800
>
>
>
> Yes.. I tried 7 bits.. different parity settings, speeds etc. Couldn't
> Interesting. When looking at this I tripped over another DEC related item:
>
> http://www.ebay.com/itm/DEC-DIGITAL-EQUIPMENT-CORPORATION-REEL-GO-NOGO-GAUGE/112082166031
>
> I'm not sure what you'd use it for unless you were manufacturing DECtape
> reels, but it certainly is interesting. You
> On Aug 4, 2016, at 4:49 PM, Wayne Sudol wrote:
>
> Just spyed this on Ebay - a box of DEC Transistors for sale.
> Might be useful to have if you like to repair DEC boards.
>
> http://www.ebay.com/itm/DEC-DIGITAL-EQUIPMENT-CORPORATION-TRANSISTOR-ASSORTMENT-NOS-/112082168459?hash=item1a189e2a8
> On Aug 5, 2016, at 10:43 AM, tony duell wrote:
>
>
>> Interesting. When looking at this I tripped over another DEC related item:
>>
>> http://www.ebay.com/itm/DEC-DIGITAL-EQUIPMENT-CORPORATION-REEL-GO-NOGO-GAUGE/112082166031
>>
>> I'm not sure what you'd use it for unless you were manufact
but as with all problem solving, Conan Doyle had it right when he said
"after eliminating the impossible, whatever is left, however improbable,
must be the solution"
That quote is often horribly abused. Diagnosis by elimination
is inherently faulty. Beginners, and "experts", will often
use
On Thursday (08/04/2016 at 11:46PM -0700), Brad H wrote:
>
>
> Yes.. I tried 7 bits.. different parity settings, speeds etc. Couldn't quite
> nail it down. In every tutorial online for the 6800 being used with PC
> terminal, they go 8 N 1.. nobody mentions specifically if you are supposed
Well come look for me and say HI. I'll be there.
corey cohen
uǝɥoɔ ʎǝɹoɔ
On Aug 4, 2016, at 12:25 PM, Ali wrote:
>> I am heading to VCF West after a stop over in San Fran today...I am
>> looking forward to meeting up with everyone. I will be there all day
>> Friday as a set-up volunteer, Sat
On Thu, Aug 4, 2016 at 12:25 PM, Ali wrote:
> > I am heading to VCF West after a stop over in San Fran today...I am
> > looking forward to meeting up with everyone. I will be there all day
> > Friday as a set-up volunteer, Sat and Sunday morning. I was at the
> > last VCF before it was called "
I'll answer by number here:
1) MP-S is in Slot 1, per instructions.
2) This MP-A board has been modified for both SWTBUG and Flex. I noted the
traces that were cut and matched to both configs.
3) Ah, this may be part of my problem. I don't quite understand memory
addressing yet. The instructi
RAM could certainly be an issue. I had *tons* of bad RAM dogging me with my
Digital Group Z80. That took two weeks of testing to get through it. I might
just test out all this RAM in the DRC boards first and see if I can get away
with just using those rather than bringing the soldered MP-M bo
I am here now, will be around all day helping set up. I have not been to
the CHM since the last VCF...The space for the event looks good, tables are
out and waiting for exhibitors.
On Fri, Aug 5, 2016 at 12:07 PM, Josh Dersch wrote:
> On Thu, Aug 4, 2016 at 12:25 PM, Ali wrote:
>
> > > I am he
I don't think I have the right baud rate at all... as I mentioned, my MSI
6800 has a very well labelled serial card and I set it to whatever baud rate
I was going for, set my terminal up and it wouldn't work. It was only by
accident that I discovered if I set the terminal to 9600 baud it worked.
S
So here's a video I made of the terminal connected to my SWTPC. I set
hyperterminal to 8, N, 1. As you can see there's no action with the reset
button, but there is a random character on power up.
https://www.youtube.com/watch?v=dvT_KYyRVWo
I then tried 7 N 1 (that's how my CT1024 terminal is s
I'll be there. Flying down from Seattle after work with an Amiga 4000 060
and a GRiD in my carry-on.
I wanted to bring a Symbolics machine, but they happen to be quite heavy. ;)
On Fri, Aug 5, 2016 at 10:01 AM, william degnan
wrote:
> I am here now, will be around all day helping set up. I have
Here is a picture/thread about the wiring of the MP-S and cable comparing
Teletype with RS232.
http://vintagecomputer.net/browse_thread.cfm?id=174
Here is a thread I made, plus a special file I created for loading TSC BASIC
http://vintagecomputer.net/browse_thread.cfm?id=416
hope this helps.
On 2016-Aug-05, at 9:55 AM, Brad H wrote:
>
> 3) Ah, this may be part of my problem. I don't quite understand memory
> addressing yet. The instructions said you needed RAM at A000 if the 6810
> chip was disabled (which it appears to be, the correct trace is cut). My
> machine has 4 RAM boards.
Okay thanks. I gues where I'm getting confused is Michael Holley's guide to
new 6800 users says because of the 6810 being cut you want RAM at $A000.. what
you're suggesting sounds like the opposite? Maybe I'd better reread those
instructions.
Sent from my Samsung device
Origi
On Fri, 5 Aug 2016, Brad H wrote:
I then tried 7 N 1 (that's how my CT1024 terminal is set up). This time I
got more consistent characters. If I hit reset, there is also a response.
If and when you get consistent characters, no matter how wrong, then it's
time to look at the bit patterns of
Yeah to be honest.. I'm not sure I'm the biggest serial terminal computer fan.
I find them way harder to diagnose than computers with video cards. But, the
SWTPC is an iconic system.. so I'll just keep muddling until I figure it out.
Sent from my Samsung device
Original messag
On Friday (08/05/2016 at 11:23AM -0700), Brad H wrote:
>
>
> Okay thanks. I gues where I'm getting confused is Michael Holley's guide to
> new 6800 users says because of the 6810 being cut you want RAM at $A000..
> what you're suggesting sounds like the opposite? Maybe I'd better reread
> > I then tried 7 N 1 (that's how my CT1024 terminal is set up). This time I
> > got more consistent characters. If I hit reset, there is also a response.
>
> If and when you get consistent characters, no matter how wrong, then it's
> time to look at the bit patterns of what you get V what you
On Fri, 5 Aug 2016, Brad H wrote:
I'm certain cabling is an issue here. I get a bit dyslexic with pins and
understanding how things change on a cable like a null modem.
OK, I don't know what your level of knowledge is on it. Mine is NOT very
high, so please don't be offended if I tell grandm
On Friday (08/05/2016 at 06:50PM +), tony duell wrote:
>
> Am I the only person who rarely, if ever, has RS232 problems?
No. ;-)
--
Chris Elmquist
>
> > Am I the only person who rarely, if ever, has RS232 problems?
>
> No. ;-)
I should have been more specific and added something like
'even though I have plenty of classic computers with RS232 ports,
serial terminals, serial printers, and so on' :-)
-tony
On Friday (08/05/2016 at 07:05PM +), tony duell wrote:
> >
> > > Am I the only person who rarely, if ever, has RS232 problems?
> >
> > No. ;-)
>
> I should have been more specific and added something like
> 'even though I have plenty of classic computers with RS232 ports,
> serial terminals
On Friday (08/05/2016 at 06:50PM +), tony duell wrote:
Am I the only person who rarely, if ever, has RS232 problems?
On Fri, 5 Aug 2016, Chris Elmquist wrote:
No. ;-)
OK, that's TWO.
The rest of us are still struggling with our ignorance.
Your explanation of baud-rate and bit numbere/p
Hi Brad. Troubleshooting baud rate and parity issues can be very
frustrating. Might i suggest using an simple rs-232c breakout box to see
what signals are being produced on the port? Check if the txd and rxd
blink when you hit the carriage return on your pc? Then you'll know if the
garbage seen is
My 2cents
Some of this may have been mentioned. Your going to need an oscilloscope,
and a scope probe with a good ground. Your 'scope probe should
be less than 15 pF. Anymore and the probe will start to filter out any high
frequency noise.
Is the supplies output grounded ?, If so that point is wh
Progress on getting the MVII up and running:
I ordered the SCSI2SD adapter and it has come in, the plan is to use it
as the system disk on the MVII.
The hobbyist VMS PAKS have arrived and I was able to download the VMS
7.3 iso, not sure what I can do with it since I think it must be burned
t
> On Aug 5, 2016, at 1:42 PM, Douglas Taylor wrote:
>
> Progress on getting the MVII up and running:
>
> I ordered the SCSI2SD adapter and it has come in, the plan is to use it as
> the system disk on the MVII.
>
> The hobbyist VMS PAKS have arrived and I was able to download the VMS 7.3
>
I think I will have to figure out how to do that. Additionally I have one of
those PC based oscilloscopes on the way. I don't know how to use them 100% but
I'm about to learn I guess. :)
I have one more question for you guys -- I have a few CT-1024 terminals and
would really like this system
I'll be there with some of my HP equipment. On my way there soon.
Marc
Sent from my iPad
> On Aug 5, 2016, at 10:08 AM, Ian Finder wrote:
>
> I'll be there. Flying down from Seattle after work with an Amiga 4000 060
> and a GRiD in my carry-on.
> I wanted to bring a Symbolics machine, but they
On Aug 5, 2016, at 3:48 PM, dersc...@gmail.com wrote:
>
>> On Aug 5, 2016, at 1:42 PM, Douglas Taylor wrote:
>>
>> Progress on getting the MVII up and running:
>>
>> I ordered the SCSI2SD adapter and it has come in, the plan is to use it as
>> the system disk on the MVII.
>>
>> The hobbyist V
On 08/05/2016 02:15 PM, Brad H wrote:
> I think I will have to figure out how to do that. Additionally I
> have one of those PC based oscilloscopes on the way. I don't know
> how to use them 100% but I'm about to learn I guess. :)
>
> I have one more question for you guys -- I have a few CT-1024
Make this yet another person as well in BC who would be jumping on it . I
got almost no use for a card reader if I have no way to punch the cards.
>Ditto. I'd be all over that if I wasn't in BC.
Is anyone shooting video for those of us that can't go? I really enjoyed the
videos of VCF East I found on Youtube. I'll likely never get to one of these
things being up here in Canada.. still fun to check out virtually.
Brad
Sent from my Samsung device
Original message --
I'd really like the AT&T 4425 terminal, which doesn't seem to have
been claimed. I spent a couple of years with one on my desk. Any
chance they'd ship?
My wife and I have an agreement that if I bring home any more VME kit
I have to get rid of an equivalent tonnage of other things. So unless
tha
On 8/5/2016 4:48 PM, dersc...@gmail.com wrote:
On Aug 5, 2016, at 1:42 PM, Douglas Taylor wrote:
Progress on getting the MVII up and running:
I ordered the SCSI2SD adapter and it has come in, the plan is to use it as the
system disk on the MVII.
The hobbyist VMS PAKS have arrived and I was
On 8/5/2016 6:18 PM, Jerry Weiss wrote:
On Aug 5, 2016, at 3:48 PM, dersc...@gmail.com wrote:
On Aug 5, 2016, at 1:42 PM, Douglas Taylor wrote:
Progress on getting the MVII up and running:
I ordered the SCSI2SD adapter and it has come in, the plan is to use it as the
system disk on the MVII.
On Fri, Aug 5, 2016 at 7:44 PM, Douglas Taylor
wrote:
> On 8/5/2016 4:48 PM, dersc...@gmail.com wrote:
>
>>
>> On Aug 5, 2016, at 1:42 PM, Douglas Taylor
>>> wrote:
>>>
>>> Progress on getting the MVII up and running:
>>>
>>> I ordered the SCSI2SD adapter and it has come in, the plan is to use i
I've been restoring a HeathKit capacitor checker.
I also have a couple HP counters with Nixies.
I even have a 10 channel printer ( need to repair the
roller ). I've found that one doesn't need the expensive
ink roller ( though I'd love to have one, used or not ).
I use the two layer impact pap
Hi
Note that the combo card does not work reliably above
4800 baud. It feeds the serial through an optical isolator,
even when doing RS232. It is really intended to do current loop
at lower speeds.
Dwight
From: cctalk on behalf of Bill Sudbrink
Sent: Mond
> On Aug 5, 2016, at 10:24 PM, Douglas Taylor wrote:
>
> On 8/5/2016 6:18 PM, Jerry Weiss wrote:
>> On Aug 5, 2016, at 3:48 PM, dersc...@gmail.com wrote:
On Aug 5, 2016, at 1:42 PM, Douglas Taylor wrote:
Progress on getting the MVII up and running:
I ordered the SCSI2S
"I've been restoring a HeathKit capacitor checker."
Which one, the IT-28? Those are really handy for finding leakage in
high-voltage caps, as they have a crazy-high (like 600V ?) power supply.
Unlike modern SS units, the IT-28 can test at practical working voltages.
There's data out there on how
Does anyone happen to have the IBM Diskette OEM Information manuals:
GA21-9190 one-sided
GA21-9257 two-sided
I'm specifically NOT looking for the Diskette General Information
Manual, GA21-9182, unless someone has an edition earlier than Fourth
or later than Sixth.
The OEM Information ma
Okay so.. I decided to try the MP-C board out, just for kicks. No change.
Then I decided to add one of the RAM boards.. the next one up in addresses.
Got a little bit when I powered on. Added one of the old MPM boards.. one that
has memory chips all piggybacked on one another. Now when
Do you have some RAM at $A000+ yet?
That's all that should matter as far as required RAM goes.
Presuming this is the holley page you were referring to:
http://www.swtpc.com/mholley/HiTerm/Test6800_Index.html
he does mention RAM needed at A000 for the BUGs, as Chris and I have been
saying.
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