RE: SWTPC 6800

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 hardware or xo/off or nothing though.  So that's another

Re: SWTPC 6800

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

RE: SWTPC 6800

"Random Stuff" on serial ports can be a speed, data-bits, or even parity mis-match. I assume you have tried tweaking these? Dave > -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Brad H > Sent: 05 August 2016 06:58 > To: 'General Discussion:

RE: SWTPC 6800

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Brad H > Sent: 05 August 2016 06:58 > To: 'General Discussion: On-Topic and Off-Topic Posts' > > Subject: RE: SWTPC 6800 > > I think this 6800 is live but I am being dogged by

Re: SWTPC 6800

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

Re: VCF West - going?

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

RE: SWTPC 6800

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.

Re: VCF West - going?

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

Re: VCF West - going?

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

RE: SWTPC 6800

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

RE: SWTPC 6800

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

Re: VCF West - going?

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

Re: SWTPC 6800

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.

RE: SWTPC 6800

> -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

Re: SWTPC 6800

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.

RE: SWTPC 6800

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

Re: SWTPC 6800

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

RE: SWTPC 6800

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

RE: SWTPC 6800

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

RE: SWTPC 6800

> > > 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

Re: SWTPC 6800

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

Re: SWTPC 6800

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

Re: SWTPC 6800

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

RE: SWTPC 6800

> > 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

Re: SWTPC 6800

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

Re: SWTPC 6800

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

Re: SWTPC 6800

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

MicroVax II update

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

Re: MicroVax II update

> 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

Re: SWTPC 6800

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

Re: VCF West - going?

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

Re: the value of old test and repair equipment

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

RE: [IBM1130] 029 keypunch available

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.

Re: MicroVax II update

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

Re: AT 3b2, IBM RT, others

I'd really like the AT 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 that

Re: MicroVax II update

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

Re: How to get a Heathkit H8 to work with a serial terminal

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

Re: MicroVax II update

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

Re: VCF West - going?

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

Re: MicroVax II update

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

Re: the value of old test and repair equipment

"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

Re: SWTPC 6800

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

Re: MicroVax II update

> 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

IBM Diskette OEM Information manuals wanted

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

RE: SWTPC 6800

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

Re: SWTPC 6800

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

Re: DEC Transistor assortment on Ebay

> 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. > >

Re: DECtape reel gauge

> 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

RE: DEC Transistor assortment on Ebay

> 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.

RE: SWTPC 6800

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