Re: More cleaning out the Bob basement

I did finally dump the first wife.  The second one is just too good to dump. On 9/18/2021 8:36 PM, Alexandre Souza wrote: I'd dump the wife... Enviado do meu Tele-Movel Em sáb, 18 de set de 2021 22:33, Mike Katz via cctalk mailto:cctalk@classiccmp.org>> escreveu: I have a ba

Re: More cleaning out the Bob basement

I have a basement but I also have a wife who complains everytime I bring some orphaned computer part (or camera) home and to the basement.  In her eyes it's all junk. Which is worse, no basement or a wife  It was because of my first wife (now ex) that I sold my 2 full racks of PDP-8/E

Re: More cleaning out the Bob basement

I'm sorry if I made a bad joke.  Please understand this was all tongue in cheek. As for plans, I had a massive heart attack in June and nearly died.   8 stents and a pacemaker later I am alive and kicking. My suggestion's are: Make a will. Put all of your real estate and investments in a

Re: Burnable, patched Microvax-2000 SCSI-boot EPROM images?

I just purchased an RK05 Controller for my PDP-8/E, does this emulator work to emulate RK05 packs?  If it does then maybe I can use it as mass storage until i can find an RK05 (or Plessey or Diablo clones) . Thanks... On 9/24/2021 3:19 PM, David Gesswein via cctalk wrote: On Tue, Sep 21,

Re: Found my favorite DOS editor

Fred Cisin said "'course, then there are the MAJOR religious battles.  Such as VI VS EMACS." I cannot agree more.  I know many people who live in VI thought I cannot fathom why.  My first screen based editor (as opposed to a text editor), in 1980, was John F. Wakerly's Programma Improved

Re: Found my favorite DOS editor

To Exit EMACS:  Control-X Control-C On 9/28/2021 5:02 PM, jim stephens via cctalk wrote: On 9/28/2021 2:48 PM, Al Kossow via cctalk wrote: "I've been using vi for about two years, mostly because I can't figure out how to exit it." :q you're welcome Or having to power cycle the

Re: Found my favorite DOS editor

Editors are like religion once you have a favorite you defend it like crazy. I discovered the Basic Reconfigurable Interactive Editing Facility (Brief), initially sold by Underware and then Solution Systems, in the late 80s.  It quickly became my favorite editor.  Eventually Borland bought

Re: Found my favorite DOS editor

Hold down the shift key and press the letter Z twice. You're free, you're free and freedom tastes like reality... On 9/28/2021 4:44 PM, Cameron Kaiser via cctalk wrote: 'course, then there are the MAJOR religious battles. Such as VI VS EMACS. "I've been using vi for about two years, mostly

Re: Found my favorite DOS editor

You are correct, in WordStar I was Control-K + C for copy, Control-K + V for move block.  In Windows it's Control-C for copy and Control-V for paste. I was wrong about control P, that is print in windows. Sorry, my memory is going. In my defense its still C for copy and V for paste in both.

Re: Found my favorite DOS editor

Control-C, Control-X & Control-P for copy, cut and paste in Windows 11 dates back to Wordstar on 8-Bit CPM systems in the 80s. On 9/28/2021 6:36 PM, Chuck Guzis via cctalk wrote: On 9/28/21 3:49 PM, Guy Sotomayor via cctalk wrote: Yes.  There is an elisp package called EVIL (Extensible VI

Terminal Emulator

I am looking for a good terminal emulator.  Not for connecting to older computers serially but to connect with my embedded designs. Do any of you have any recommendations. I've been using Realterm for years but it's not very good. I used UCON, hyper term, terra term, telix (going way back) and

Re: Terminal Emulator

I personally preferred Telix to Procomm. It doesn't surprise me that this thread changed from what terminal program will meet my needs today to what Terminal program have you used in the past. That's because all of us are just as vintage as our computers  On 10/2/2021 9:54 PM, Ali via

Re: Linux and the 'clssic' computing world

The is also the Windows Subsystem for Linux, which basically runs Linux under Windows. https://docs.microsoft.com/en-us/windows/wsl/ On 9/27/2021 9:07 AM, Joshua Rice via cctalk wrote: Claiming one OS is better than another is always a contentious issue, and i'd rather prefer that this

Re: RK11-C indicator panel inlays?

One dumb suggestion to make it easier to control 144 lamps is to use addressable LEDs.  You can control them in banks or all in a single serial line.  If you use a single line you can control all of them with just 1 GPIO. Each LED requires 24 bits of data.  That would be 3,456 bits.  The

Re: RK11-C indicator panel inlays?

specify the board especially for the PDP-8 Omnibus which should have gold fingers on the edge connectors? Thanks and good luck,   Mike On 12/6/2021 2:07 PM, David Bridgham via cctalk wrote: On 12/6/21 10:36 AM, Mike Katz via cctalk wrote: Each LED requires 24 bits of data

Re: RK11-C indicator panel inlays?

ike On 12/6/2021 3:05 PM, Ethan Dicks wrote: On Mon, Dec 6, 2021 at 10:36 AM Mike Katz via cctalk wrote: One dumb suggestion to make it easier to control 144 lamps is to use addressable LEDs. You can control them in banks or all in a single serial line. If you use a single line you can control

Re: PDP - 11 was RK11-C indicator panel inlays? -

i'm interested in the RK05 Replica also. On 12/6/2021 2:27 PM, ben via cctalk wrote: On 2021-12-06 8:13 a.m., Henk Gooijen via cctalk wrote: Van: David Bridgham via cctalk Verzonden: maandag 6 december 2021 15:52 Aan: General Discussion: On-Topic and Off-Topic

Re: RK11-C indicator panel inlays?

For other boards without gold fingers where would you recommend and how expensive for omnibus size boards? On 12/6/2021 5:07 PM, Guy Sotomayor via cctalk wrote: On 12/6/21 2:45 PM, Mike Katz via cctalk wrote: If I may8 ask a question.  I have never had boards made before. How do I find

Re: RK11-C indicator panel inlays?

Thank you. On 12/6/2021 6:33 PM, Jon Elson via cctalk wrote: On 12/6/21 5:50 PM, Mike Katz via cctalk wrote: For other boards without gold fingers where would you recommend and how expensive for omnibus size boards? I've been using PCBway in China.  Usually, the DHL shipping is more

Re: RK11-C indicator panel inlays?

I am currently using kicad for the stuff from other PDP-8/omnibus creators but I intensely dislike the user interface paradigm on kicad. We use Altium at work and I have been thinking about using that. On 12/6/2021 6:44 PM, David Bridgham via cctalk wrote: On 12/6/21 17:45, Mike Katz wrote:

Re: TU56 DECtape takeup reel needed

I am also in need of emtpy reels.  I purchased a TU56 that had been taken apart to restore and the restoration had never been finished. The empty reels were not in the box of parts. Has anyone tried 3D printing these? On 12/17/2021 8:01 AM, Jay Jaeger via cctalk wrote: On 12/12/2021 1:08 PM,

Re: OT: Traveling to Zurich in February

If you are in Zurich you might want to go to Lucerne.  It's about 30 minutes away from Zurich and is a beautiful city. Also, if you are in Zurich you might want to go to Confiserie Sprüngli on Bahnhofstrasse (https://www.spruengli.ch/en/). It is a well known restaurant in Zurich. On

Re: OT: Traveling to Zurich in February

You might wan to go to vcfed.org and there you might be able to see what vintage computer museums are available in Europe. On 12/17/2021 11:25 AM, Bill Degnan via cctalk wrote: On Fri, Dec 17, 2021 at 11:06 AM Christian Corti via cctalk < cctalk@classiccmp.org> wrote: On Fri, 17 Dec 2021,

Rk05 to RK8E cables

This weekend I'm picking up an RK05 drive that does not have the M993 to 40 pin berg cables and may not have the M930 terminator. I know that Roland designed a cable kit for it. Does anyone have a spare M993 (preferably the C model with the buffer chip) or one of Roland's kits for sale or

Re: I-4004

As for microprocessors, there are MANY MANY micros that preceded the PC. You can find a list here:  https://en.wikipedia.org/wiki/Microprocessor_chronology The 8088 is a late comer to the microprocessor world. On 11/16/2021 4:08 PM, Murray McCullough via cctalk wrote: Did the 4004 chip

Re: Apple cube cleaning

Have you tried Goo Gone? On 11/18/2021 8:34 AM, jacob--- via cctalk wrote: I got a Apple cube here as part of a larger haul, at some point someone placed a bit of tape on the clear polycarbonate case, the tape is long gone but the yellow glue remains. Am unsure about the hardness of it, if

Re: memory assignment jumpers MM8EJ

This should help: On the G104 board there are some jumpers EMA0, EMA1 and EMA2.  These correspond to the the bits of the extended address of the board. A jumper inserted means 0 and a jumper removed means a 1. EMA    0     1 2   0  In In In   1  In In Out   2 

Re: 8" disk drive questions...

I'm not as familiar with 8" drives but in the 5.25" drives there were small punches you could buy that were designed to punch an additional index hole so single sided floppies could be used as flippies. I think it was Wangco that made a single sided drive that had dual write protect and dual

Re: Linux and the 'clssic' computing world

One major issue with any patch or code change is regression testing.  Any given change may fix a particular issue but what are the ramifications for the entire system across all circumstances. Though a change or fix may seem simple to integrate, the time is takes to fully vet that fix could

Re: Siemens T100 Terminal with Paper Tape - Available

1 PM, Mike Katz via cctalk wrote: Wow 6 bit baudot paper tape I think. That's an oldie藍 On 12/8/2021 12:50 PM, Monty McGraw via cctalk wrote: I have this terminal in my garage - sitting on its custom stand. I purchased it years ago, but don't have a use for it. Here is my photo of

Re: Siemens T100 Terminal with Paper Tape - Available

You are correct, I counted wrong.  Can I chalk it up to old date and bad eyes? On 12/8/2021 1:52 PM, Paul Koning wrote: No, it's 5 bit tape. 2 data bits, transport sprocket holes, 3 data bits -- top to bottom on the reader (right side), left to right on the punch (left side). DEC PDP-10

Re: Siemens T100 Terminal with Paper Tape - Available

Wow 6 bit baudot paper tape I think.  That's an oldie藍 On 12/8/2021 12:50 PM, Monty McGraw via cctalk wrote: I have this terminal in my garage - sitting on its custom stand. I purchased it years ago, but don't have a use for it. Here is my photo of it:

Re: Siemens T100 Terminal with Paper Tape - Available

correction old age, arthritic fingers and old age? On 12/8/2021 2:57 PM, Mike Katz via cctalk wrote: You are correct, I counted wrong.  Can I chalk it up to old date and bad eyes? On 12/8/2021 1:52 PM, Paul Koning wrote: No, it's 5 bit tape.  2 data bits, transport sprocket holes, 3 data

Re: PDP-11/70 Boards

More accurately up to it's rated wattage "Power = Voltage * Current" after all. If you have a 100W max variac you can draw 20A @ 5V (approx) but only 1A at 100V. On 12/8/2021 4:44 PM, Mike Katz via cctalk wrote: "As a general rule, a variable transformer (Variac) can prov

Re: PDP-11/70 Boards

? -Original Message- From: cctalk On Behalf Of Mike Katz via cctalk Sent: Wednesday, December 8, 2021 5:58 PM To: General Discussion: On-Topic and Off-Topic Posts ; wrco...@wrcooke.net Subject: Re: PDP-11/70 Boards More accurately up to it's rated wattage "Power = Voltage * Current"

Re: PDP-11/70 Boards

"As a general rule, a variable transformer (Variac) can provide full rated current at any output voltage. So a 2.5A unit can provide 2.5 A at 1V, 10V, 120V, etc. With a 20V output, that is 50 VA (Watts, sort of)." Up to the current rating of the variac.  When you draw more current than the

Re: Wanted: IBM PC compatible 8 or 16 bit Arcnet cards

For my kids and their friends I used to set up several (up to  like 5) bare motherboards first with lantastic 2MB cards and then NE2000 10mB compatible cards and play Doom over IPX back in the 90's. On 12/13/2021 2:09 PM, Grant Taylor via cctalk wrote: On 12/12/21 10:28 PM, Ethan Dicks via

Re: Memory Tech you don't see very often

://www.rcaselectron.com/sel1024.html (2 by 512) 256 Bit Selectron Pics http://www.rcaselectron.com/sel256.html (2 by 128) 9 Bit Selectron Pics http://www.rcaselectron.com/sel9.html On 1/6/2022 8:10 PM, Eric Smith wrote: On Thu, Jan 6, 2022, 08:45 Mike Katz via cctalk wrote: There was also a 1K by 4

Re: 8" Floppy Drives needed

Richard, Please let me know the cost and I will be happy to paypal it to you. thank you, Mike +1 (773) 414-1044. On 1/12/2022 11:31 AM, Richard Loken wrote: I have, as far as I recall, a 8" single sided full height Shugart drive here that I swapped out of my Trash 80 Model

8" Floppy Drives needed

I am looking for one or two 8" floppy drives, preferably Shugart compatible at a reasonable price. Does anyone have anything like this laying around, unused, in their basement, storage locker, garage, etc. I am looking to make a RX01 (and hopefully RX02) disk formatter and copier. Thanks,  

Re: NEXT/LISP Mirror has viruses

I am looking for one or two 8" floppy drives, preferably Shugart compatible at a reasonable price. Does anyone have anything like this laying around, unused, in their basement, storage locker, garage, etc. I am looking to make a RX01 (and hopefully RX02) disk formatter and copier. Thanks,  

Re: 8" Floppy Drives needed

A completely software driven controller could handle reading an RX02 disk it if it knows to expect it. There is a switch on the logic board inside the RX02 to indicate whether the drive should be RX01 or RX02 compatible On 1/12/2022 2:23 PM, Noel Chiappa via cctalk wrote: > On Wed, Jan

Re: 8" Floppy Drives needed

I am looking into the fluxengine system and a Raspberry Pi. On 1/12/2022 3:28 PM, Chuck Guzis via cctalk wrote: On 1/12/22 12:23, Noel Chiappa via cctalk wrote: Given how arcane the RX02 format is (sector _headers_ are written in single density; sector _data_ is written in double) I'd be

Re: Rack Discussion Continued - Slide lubricant

Good point. On 3/4/2022 3:06 PM, Peter Coghlan via cctalk wrote: I have several difficult slides in my H960 rack. What is the best lubricant for the slides? I was wondering if graphite would work better than oil due to the fact that it won't pick up dirt and dust. Powdered graphite for

Re: Looking for computer and individual to read old floppy disks

I use a greaseweazle to read and format DEC RX01/RX02 8" diskettes. It supports all sizes and formats. https://github.com/keirf/greaseweazle https://decromancer.ooo/greaseweazle/ https://retrocmp.de/hardware/greaseweazle/greaseweazle.htm https://www.tindie.com/search/?q=greastweazle On

Re: Seeking paper tape punch

If you can find on a Teletype ASR33 is the perfect example of a reader/punch and a hard copy terminal all at the same time. If you find 2, please let me know :) On 2/21/2022 3:26 PM, Guy Fedorkow via cctalk wrote: [apologies if this is a dup, but I didn't see it coming back in any of the

Rack Discussion Continued - Slide lubricant

I have several difficult slides in my H960 rack. What is the best lubricant for the slides? I was wondering if graphite would work better than oil due to the fact that it won't pick up dirt and dust. On 3/2/2022 10:45 AM, Chris Elmquist via cctalk wrote: On Tuesday (03/01/2022 at 04:36PM

Re: Origin of "partition" in storage devices

In those cases the bits/inch changed to keep a constant data rate and constant number of bits and sectors per track. On 2/1/2022 11:21 AM, Paul Koning wrote: On Feb 1, 2022, at 12:16 PM, Mike Katz via cctalk wrote: In the rotating drive world there is constant linear velocity (CLV

Re: Origin of "partition" in storage devices

In the rotating drive world there is constant linear velocity (CLV) and constant angular velocity (CAV) drives. On CLV drives the speed of rotation would vary based on the track (slower in the inner tracks and faster on the outer tracks).  This meant that the data rate and number of

Re: Origin of "partition" in storage devices

OS/8 Partitioned the RK05 into 2 (or 4 for the RK05F) partitions due to the limitations of 12 bit addressing in the 70's. On 1/31/2022 7:41 PM, Bill Degnan via cctalk wrote: OS/8 partitioned RK02 disk packs. On Mon, Jan 31, 2022 at 2:38 PM Warner Losh via cctalk < cctalk@classiccmp.org>

Re: Origin of "partition" in storage devices

The RK02/RK03 (Diablo predecessor to the DEC RK05) were introduced in 1972 so partitioning goes back that far at least. My guess is it goes back even further. On 1/31/2022 7:41 PM, Bill Degnan via cctalk wrote: OS/8 partitioned RK02 disk packs. On Mon, Jan 31, 2022 at 2:38 PM Warner Losh via

Re: DECTape head problem

I wonder if there are any professional audio multi-track recorders that match the tape width, number of tracks and tack pitch and have the necessary frequency response. On 2/7/2022 3:05 PM, Marc Howard via cctech wrote: 8 track tapes use 1/4" wide tape. Most 8 track units use heads with only

DEC Tape TU56 head pictures

I am in the process or restoring a TU56 so it's in pieces.  Pictures of the head were requested so here they are. These were taken with my phone so the quality is only mediocre. This, like the rest of the drive, is in the process of being restored. I'm still not sure how to clean the front of

Re: DEC Tape TU56 head pictures

What about corrosion or calcification or whatever that crusty stuff is on the heads. I used 3M Scotchbrite to clean the sides. On 2/9/2022 11:23 AM, Paul Koning wrote: On Feb 9, 2022, at 11:11 AM, Mike Katz via cctalk wrote: I am in the process or restoring a TU56 so it's in pieces

Re: DEC Tape TU56 head pictures

Thank you. On 2/9/2022 3:46 PM, Chuck Guzis via cctalk wrote: On 2/9/22 12:44, Gavin Scott via cctalk wrote: On Wed, Feb 9, 2022 at 10:11 AM Mike Katz via cctalk wrote: I'm still not sure how to clean the front of the head where the tape touches the head. Any ideas? Back in the day

Re: MG10 parts

I added descriptions. On 1/31/2022 3:55 AM, Paul Anderson via cctalk wrote: While moving some things around I found the following: 7 M8588 Parity Check 6 M8591 Address Receivers 6 M8592 Port Address Interface 4 M8593 MG10 Data Registers 14 M8594 MG10 Data Transceivers All appear to be

Re: seeking Motorola M68MM01A2 documentation

I think it might be easier to modify the 680 prom for the I/O addresses of the board rather than modify the board to match the ROM. Especially if the address decoding for the I/O is done in PAL (10L8 for example). Some 6800 address decoding was done with 74LS138s.  This had the potential to

Re: AOL diskettes

I just love that table On 1/18/2022 3:21 PM, Peter Coghlan via cctalk wrote: On Tue, 18 Jan 2022 at 13:38:32 -0700, Adam Thornton via cctalk wrote: I wish I'd kept some. I had some AOL CDs from slightly later that made decent coasters for decades. Although I guess with the shutter, the

Re: seeking Motorola M68MM01A2 documentation

If the software is using ROM routines then the address doesn't matter for the applications.  If not, you can create an abstraction layer (set of drivers for the ACIA, 6875 Timer and PIA) and if all of the code is written to the abstraction layer then all you need to do is link in the

Re: seeking Motorola M68MM01A2 documentation

If you include the 6875 Timer chip, follow the data sheet carefully, it's a little tricky in its discretes (I don't remember from 40 years ago what exactly it is). The biggest disadvantage to the 6850 ACIA and 14411 Baud rate generator is the baud rate is NOT software selectable. SWTBUG was

Re: DEC RX01 Parts

02 OS/8 driver and have the RX28 controller card). Thanks again,     Mike On 1/21/2022 6:26 PM, Charles Dickman wrote: On Fri, Jan 7, 2022 at 7:41 PM Mike Katz via cctalk wrote: I don't know if the circuit boards are compatible with the RX8E Controller. The Read/Write Co

Re: Memory Tech you don't see very often

There was also a 1K by 4 version of this tube. On 1/6/2022 3:03 AM, Brent Hilpert via cctalk wrote: On 2022-Jan-06, at 12:19 AM, Joshua Rice via cctech wrote: Not cost effective at nearly $10,000! I understand they're very rare, given they were only used for a few years in industry and

DEC RX01 Parts

I have acquired an RX01 dual drive set from a VAX780 (RX01W-VA). I am converting it to fit in my PDP-8 rack. I removed the VAX cabinet frame. I have the front panel but I need the following parts: IMC PEWEE BOXER 80mm fan PWS2107FL-1000 cooling fan (this unit has an individual fan for each

Re: seeking Motorola M68MM01A2 documentation

Johnathan, I saw you will be ordering boards pretty soon. I need to order some boards for my PDP-8/E but I've never ordered boards before. What board house do you use?  Have you ever specified gold fingers before? Any advice would be greatly appreciated. Thanks,    Mike            

Re: Advice on Desoldering an IC

I have to second this comment. I learned to solder in the early 70s building kits and again professionally in the early 80s. In the early days of thicker circuit boards (2 layer only).  A solder sucker and solder wick would work. However, the most expedient and safest way in terms of

[cctalk] Re: Silly question about S-100 and video monitors

Composite will 99.99% of the time be better than RF modulated due to the bandwidth of NTSC (American) Televisions.  The NTSC television standard was not what I would exactly call high tech or high resolution.  It was 525 scan lines interlaced at 30Hz meaning that there was only 262.5 lines

[cctalk] Re: Silly question about S-100 and video monitors

OMG Flavor Radio, that brings back memories of working at Radio Shack in 1977 fresh out of high school. Thanks for the trip down memory lane and making me feel old again (or is that still). On 8/31/2023 3:52 PM, Chris Zach via cctalk wrote: Which is weird, since Radio Shack was renowned

[cctalk] Re: Silly question about S-100 and video monitors

You are correct for some but I do recall some with a composite output in that little switch box as well.  Maybe I'm misremembering from 50 years ago. On 8/31/2023 6:02 PM, Fred Cisin via cctalk wrote: On Thu, 31 Aug 2023, Mike Katz wrote: The roots of this standard go all the way back to the

[cctalk] Re: PDP-8/L $15,000

However, epay does charge an insertion fee so they will have to pay even when it doesn't sell. On 8/28/2023 1:37 PM, Bill Degnan via cctalk wrote: On Mon, Aug 28, 2023, 1:46 PM Chuck Guzis via cctalk wrote: On 8/28/23 10:30, Bill Degnan via cctalk wrote: It can be yours for only $15,000

[cctalk] Setup for VCFMW

What time is setup Tomorrow (Friday, 8-Sep-23) for VCFMW?

[cctalk] Re: Vintage Computer Fest Midwest "DECnut" pizza party

360-838-3675 https://infocom.ai On Sep 7, 2023, at 5:07 PM, Mike Katz via cctalk wrote: My sympathies to both of you and wishes for a good and complete recovery. 2 years ago I had a heart attack in my dojo.   8 stents and a pacemaker later I was back on the mat in 3 weeks. It was 6 mon

[cctalk] Re: Vintage Computer Fest Midwest "DECnut" pizza party

With Dorothy and the Tin Woodsman as their salespeople 藍 I think those would be micro-vaxen because they are only single user. On 9/7/2023 4:44 PM, ste...@malikoff.com steven--- via cctalk wrote: On 09/07/2023 2:36 AM AEST Mike Katz via cctalk wrote: Does VAX have nothing to do with vacuum

[cctalk] Re: Vintage Computer Fest Midwest "DECnut" pizza party

My sympathies to both of you and wishes for a good and complete recovery. 2 years ago I had a heart attack in my dojo.   8 stents and a pacemaker later I was back on the mat in 3 weeks.  It was 6 months before I was able to go full speed. Getting old sucks!!! On 9/7/2023 6:58 PM, KenUnix

[cctalk] Re: PDP-8/L $15,000

DEC did make the Interprocessor Buffer (M8326) for the Ominibus. That allowed for relatively high speed communications between machines.  You could also do some kind of serial network like Lantastic.    I know some company made an SDLC board set for the omnibus. On 8/30/2023 8:04 AM, Paul

[cctalk] Re: Silly question about S-100 and video monitors

-330+ maxes out at 19,200. Remember the teletypes ran at 110 baud or slower.  The decwrite and GE Terminet were speed demons at 300 and 1200 baud. On 8/30/2023 3:02 PM, Warner Losh wrote: On Wed, Aug 30, 2023 at 1:52 PM Mike Katz via cctalk wrote: I had a video board and keyboard on my

[cctalk] Re: Silly question about S-100 and video monitors

I had a video board and keyboard on my Gimix SS-50 system. Why? 1.  The video board/monitor is much faster than a terminal even at 115,200 baud. 2.  A Video board, keyboard and monitor was way cheaper back then than a terminal (Yes there was the SWTPc CT64 and the Lear Siegler ADM-3A kits,

[cctalk] Re: VCFMW vendor tables

I have to second the motion.  In my opinion in general social media is a waste of time and energy. I understand the time it takes to run VCF but to have multiple possible different places (webiste, ICM, discord, etc) to get information is a bit much, especially for us old farts. Discord

[cctalk] Re: VCFMW vendor tables

30, 2023, at 11:11, Mike Katz via cctalk wrote: I have to second the motion. In my opinion in general social media is a waste of time and energy. I understand the time it takes to run VCF but to have multiple possible different places (webiste, ICM, discord, etc) to get information is a bit

[cctalk] Re: Silly question about S-100 and video monitors

The probem with RF Modulators is that due to the National Television Standards Committee standards for American television there wasn't enough bandwidth to display 80 characters x24  lines (or 25 lines with status). Generally 64 x 16 was the maxmimum that would be readable on a standard black

[cctalk] Re: Silly question about S-100 and video monitors

I think you forgot the most common storage back then.  Audio cassette at 300 or 1200 baud. On 8/30/2023 5:39 PM, Fred Cisin via cctalk wrote: On Wed, 30 Aug 2023, Wayne S wrote: When s-100 machines came out, they were standalone. The serial port was for sending serial data not for a terminal.

[cctalk] Vintage Computer Fest Midwest "DECnut" pizza party

Do you understand "Stop this RIM RAM or I will DEC you"? Do you know what PDP is an acronym for? Do you think in PDP-11 Assembler. Do you know the difference between OS/8 and RTS/8. Is EMACS your friend? Can you discuss the advantages of Tops 10 over Tops 20. Have you ever programmed a DEC

[cctalk] Re: Vintage Computer Fest Midwest "DECnut" pizza party

e occasion of the 20th anniversary of the PDP-11. If so that would have been 2000. I still have the poster that went with it somewhere. And I remember the question I contributed: "On what model and under what circumstances will the PC increment by 1?" paul On Sep 6, 2023, at 12:

[cctalk] Re: Good C to FPGA/PLA compiler

My plan is to have both a serial port for connection to a PC/Terminal and an I2C output to a multi line display. Thanks for the suggestion. On 9/22/2023 4:45 PM, ben via cctalk wrote: On 2023-09-22 3:16 p.m., Mike Katz via cctalk wrote: Martin, The debug board will need to have

[cctalk] Re: Good C to FPGA/PLA compiler

with the OmniBus A BeagleBone, using the PRUs - which are ~microcoded, would be in with more of a chance Industrial grade SoCs / FPGAs should have no difficulty Martin -Original Message- From: Mike Katz via cctalk [mailto:cctalk@classiccmp.org] Sent: 23 September 2023 00:27 To: General Discussion

[cctalk] Re: Good C to FPGA/PLA compiler

I have no plans to emulate the CPU.  This is intended to be a board to help debug programs and possibly some hardware issues. On 9/22/2023 6:06 PM, Martin Bishop via cctalk wrote: Chuck, Your point is wholly valid, although the core will run more at 1 GHz than 200 MHz. The UniBone

[cctalk] Re: Good C to FPGA/PLA compiler

Martin, The debug board will need to have the following functionality: 1. Read and write to/from memory when the CPU is running using one cycle data break (DEC's version of DMA for the PDP-8). Single Cycle DMA requires some interesting signaling, including putting the priority on the

[cctalk] Re: Good C to FPGA/PLA compiler

I plan on controlling the gate array with an RP2040 dual core cortex M0 running at 133 MHz and 8 PIO processors. However, the Data Break (DMA) timings on the Omnibus are in the 100nS range.  The bus runs 6 different timing signals plus manipulating all of the other signals to implement Data

[cctalk] Good C to FPGA/PLA compiler

I'm working on the design for an Omnibus (PDP-8/E) debug board and I am not very good at circuit design.  I know there are programs that will compile something that looks like C into Verilog/VHDL/Abel/Etc for use on some kind of large (more than 64 pins) programmable logic device. Can any of

[cctalk] Teletypes for sale

Hey folks. I need to re-home a bunch of cool old Teletype Corporation machines. Working condition unknown, and also have some spare parts. I am not out to make a mint, so make offer! They seem mostly complete, in varying condition. Some are nicer than others. They all worked when stored

[cctalk] Teletypes for sale - redux with pics on google drive and contact info.

Hey folks. I need to re-home a bunch of cool old Teletype Corporation machines. Working condition unknown, and also have some spare parts. I am not out to make a mint, so make offer! They seem mostly complete, in varying condition. Some are nicer than others. They all worked when stored (years

[cctalk] Re: What happened to the PDP-8 on ebay?

The original listing price was $25,000 and was reduced to $18,000 when there we no bids at the original price. On 10/5/2023 2:34 PM, Sellam Abraham via cctalk wrote: On Tue, Oct 3, 2023, 9:18 PM jim stephens via cctalk wrote: On 10/3/23 21:23, Bill Degnan via cctalk wrote: There was a

[cctalk] I am looking for the Popular Electronics Digital Logic Micro Lab ( SWTPC Logic Demon)

This was the kit that matched the article in April 1970 Issue of Popular Electronics. Yes I can build one from modern parts but I used one of these in 1972 and I would love to get my hands on one, at a reasonable price. Here is a link to the article:

[cctalk] Re: PDP-8/L $15,000

I forgot to mention that I was playing the Focal version on a PDP-8/L coincidentally. On 8/28/2023 4:16 PM, Mike Katz via cctalk wrote: I played the graphics lunar lander on a PDP-9 with a graphics display and push buttons (not the sw) in a back room in the Kiewit Computation Center

[cctalk] Re: PDP-8/L $15,000

it's been there for over a week. In unknown condition. I think that price is disgustingly high. I would love to have one but that is the down payment on a car, not a used computer.  Antique or not. On 8/28/2023 12:30 PM, Bill Degnan via cctalk wrote: It can be yours for only $15,000 plus

[cctalk] Re: PDP-8/L $15,000

I played the graphics lunar lander on a PDP-9 with a graphics display and push buttons (not the sw) in a back room in the Kiewit Computation Center at Dartmouth in like 1972 or 1973, the same time I was playing it in text on a teletype ASR-33 in Focal.  Hand typed in and punched to paper tape.

[cctalk] Re: PDP-8/L $15,000

I hate what epay is doing to our hobby. I prefer to sell and trade between our selves as reasonable prices understanding that a lot of what we do is sweat equity. On 8/28/2023 3:56 PM, Sellam Abraham via cctalk wrote: On Mon, Aug 28, 2023 at 11:50 AM Mike Katz via cctalk wrote: However

Re: interesting DEC Pro stuff on eBay

Intel has never understood interrupts or good cpu architecture. Look at the segment:offset architecture of the 8086 and of course it's single interrupt (without the separate interrupt controller chip) vs the 68000 somewhat orthogonal 32 bit architecture and 256 interrupts with 8 levels built

Re: idea for a universal disk interface

Which is more generic. ESDI, SMD or SCSI. In my opinion, SCSI is as close are you are going to get to a universal interface. As for reading raw data from a drive.  The newer the drive, the higher the bit density and lower the strength of the magnetic fields and hence the lower the flying

Re: IMSAI SIO2 cable part number

Standard 100mil (.1 inch center) edge connectors are still very common and available from most electronic parts distributors. For example: https://www.mouser.com/c/connectors/card-edge-connectors/ On 4/18/2022 5:48 PM, Jon Elson via cctalk wrote: On 4/18/22 14:03, Bill Degnan via cctalk

Oracle Releases Solaris 11.4 "CBE" Free For Open-Source Developers / Non-Production Use

I don't know if this has been posted already or not so I thought I would show it here. https://www.phoronix.com/scan.php?page=news_item=Oracle-Solaris-11.4-CBE

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