Re: several items for sale and a note.

I can't it's in the way. Space and all are the reasons. You can get the pin out for both ends from the manuals and the prints. If you get it wrong things just don't work but no breakage. On 11/22/19 3:42 PM, Henk Gooijen wrote: >   > >   > > *Van: *allison via cctech

several items for sale and a note.

Note: we have some entity scraping the list(how is not determined). If I post I find that I get spam for about a week after until I post again. Most of the SPAM is scamware. It maybe someone with a virus on their system or a account that is for a bogus user. Take from that what you may. Now

Re: Quantum 2080 and 540 service manuals

On 11/16/19 12:48 AM, Chuck Guzis via cctech wrote: > On 11/15/19 2:21 PM, dwight via cctalk wrote: >> Heads getting stuck on the ramp? >> Maybe it has warn a groove in the plastic. It could be the bearings on the >> head assembly as well. >> Dwight > > Dunno--I only fire the thing up about once

Re: M7264 Troubleshooting

On 06/08/2019 10:37 PM, Noel Chiappa via cctech wrote: > > From: Allison > > > ODT for the two systems are very different. .. KDF-11 the ODT is part > > of the higher level code. The larger cards (11/23 and 23+) boot to > > resident (ep)rom. > > Ah, no. (Well, the KDF11 CPU's can

Re: M7264 Troubleshooting

On 05/29/2019 07:17 AM, Noel Chiappa via cctech wrote: > > From: Josh Dersch > > > how is the backplane in the H11 currently configured? (i.e. what boards > > are in what slots?) Could the issue here be something as simple as a > > break in the qbus due to a misplaced board? > >

Re: Possible PUTR bug?

My Solution is easier, least for me. I have a few Z80 CP/M machines with 765A in it and if it can't read it its likely due to being hard sectored or M2FM. I has 3.6, 5.25 and 8" and the 5.25 are Teac FD55gfh which are dual speed and can do all modes. With my own software and utilities it does

Re: Greetings

On 04/29/2019 11:37 AM, Jon Elson wrote: > On 04/29/2019 06:47 AM, allison via cctech wrote: >> On 04/28/2019 09:28 PM, Grant Taylor via cctech wrote: >>> On 4/28/19 6:27 PM, Ray Jewhurst wrote: >>>> I already have a Hobbyist License.  I am just interested in >>

Re: Greetings

On 04/28/2019 09:28 PM, Grant Taylor via cctech wrote: > On 4/28/19 6:27 PM, Ray Jewhurst wrote: >> I already have a Hobbyist License.  I am just interested in >> experimenting with different OSes and different versions of OSes. > > ACK > > I don't know what VAX hardware VMS 1.5 supported, what

Re: Thinking about PDP11 PC05 Emulation

On 03/11/2019 02:11 PM, Jay Jaeger via cctech wrote: > I have several PDP-11's in my collection (among other things), and not > enough PC05 tape readers (or enough room) to go around. But most if not > all of my machines have M7810 PC11 interfaces, and I have one I could > move from machine to

Re: 11/70 - original or 570 model more desirable?

> On Wed, Jan 30, 2019 at 9:49 PM Bill Degnan via cctech < > cctech@classiccmp.org> wrote: > >> Random question >> would you prefer having, if you had to pick only one, the original PDP >> 11/70 or the newer "blue cabinets" PDP 11/70, assuming both were complete >> configurations with racks of

Re: music dec tapes? (paper)

On 01/03/2019 11:15 PM, Kyle Owen wrote: > On Thu, Jan 3, 2019, 17:48 allison wrote: > >> I don't think this album has been forgotten; I have a copy, and I >> know others with copies, too. It seems as though "Unplayed by >> Human Hands" (both

Re: music dec tapes? (paper)

On 01/03/2019 05:22 PM, Kyle Owen wrote: > On Thu, Jan 3, 2019 at 3:29 PM allison via cctech > mailto:cctech@classiccmp.org>> wrote: > > Those were likely with a PDP12 or LAB-8 with DAC board.  The code > actually is a roughly > digital version of tones in 10 o

Re: music dec tapes? (paper)

On 01/03/2019 09:03 AM, Bill Degnan via cctech wrote: > I have tapes with labels > > 8-152a 8 Music Coding Program Symbolic #1 > 8-152 8 Music Coding Program Symbolic #2 > 8-152 Teddy Bear's Picnic Symbolic > 8-152a Penny Lane Symbolic > 8-152 Joy to the World Symbolic > 8-152 Your Mother

Re: Origin of 'Straight 8' name

On 12/21/2018 01:10 PM, Al Kossow via cctech wrote: > > On 12/21/18 10:03 AM, Al Kossow via cctalk wrote: > >> "Straight-8" seems to be a fairly modern name coming from collectors >> >> I never heard it called that before then. > Anyone feel like doing a alt.sys.pdp-8 search for it by date? > > I

Re: Core memory emulator using non volatile ram.

On 12/15/2018 03:51 PM, Jon Elson via cctech wrote: > On 12/15/2018 02:45 PM, Anders Nelson via cctalk wrote: >> Serial flash has an endurance between 10K-100K writes per cell so I >> think >> that would break down quickly. Wear-leveling on a serial device would be >> very slow... >> >> > If you

Re: Core memory emulator using non volatile ram.

On 12/16/2018 10:07 PM, ben via cctech wrote: > On 12/16/2018 8:00 PM, allison via cctech wrote: > >> In the end, current generation CMOS ram is the easy out, battery is >> small, cost is small,  and >> produces much less of the heat that is killer to systems.  

Re: Core memory emulator using non volatile ram.

On 12/15/2018 09:32 PM, Charles Anthony via cctech wrote: > On Sat, Dec 15, 2018 at 6:15 PM Rod G8DGR via cctalk > wrote: > >> All very interesting.. 1201 alarm while I deal will all of the information >> Rod >> >> > 1202 coming up... > > I don't know specifically about the various memory types

Re: Core memory emulator using non volatile ram.

On 12/15/2018 01:01 PM, Guy Sotomayor Jr via cctech wrote: > FRAM or MRAM. I make extensive use of them in my projects. > > Everspin has a few (all SMT and 3.3v). As I recall they run ~$20/ea for 4Mb > (512K x 8 or 256K x 16). > > TTFN - Guy > >> On Dec 15, 2018, at 1:22 AM, Rod G8DGR via

Re: N8vem and z80sbc

On 12/03/2018 03:34 PM, trtech thetrtech.com via cctech wrote: > Looking for software especially rom code for both of these SBC boards. Does google or other search engine work where you are... First hit was:   http://obsolescence.wixsite.com/obsolescence/the-n8vem-sbc Allison

Re: Datasheet for a NEC Chip in DEC Professional 350

On 11/04/2018 08:10 AM, Rob Jarratt via cctech wrote: >> -Original Message- >> From: Tony Duell [mailto:ard.p850...@gmail.com] >> Sent: 04 November 2018 12:42 >> To: r...@jarratt.me.uk; Jarratt RMA ; General >> Discussion: On-Topic and Off-Topic Posts >> Subject: Re: Datasheet for a NEC

Re: BPK-72 or Bubble Memory Dummy Module + Seed Module

On 10/09/2018 02:42 PM, dwight via cctech wrote: > CHM has these in their collection. Where are you located at? They don't look > really complicated. I'd think one could make one if they had a schematic. > > Dwight > > > > From: cctalk on behalf of Josh via

Re: Teac Mt-2st/20D-12-u

On 10/07/2018 01:48 PM, Craig Ruff via cctech wrote: > I used to have a SCSI interface version of that drive type, I made backups of > my Mac Plus (I think it was) hard drive. Since I don't have it currently, I > believe I gave it to a friend along with the rest of my Mac Plus peripherals. >

Re: VAX 11/785 "Superstar" Backplanes

On 09/05/2018 01:53 AM, Paul Birkel via cctech wrote: > On the 'bay: 183405165416 and 183405165414 "Scrap / Gold Recovery" > > > > Six total. One wonders what the scrappers did with the rest, and where they > came from given that the location is Goffstown, New Hampshire. > > > > paul > There

Re: how good is the data reliability with CD ROM and DVD RAM?

On 07/23/2018 09:21 AM, Devin Monnens via cctech wrote: >> I have a lot of backup here stored in CDs, and I have recently bought >> an SCSI DVDRAM unit to create new backups in caddies DVD-RAMs (of >> 4.2Gbyte each) > > what is your experience? > > > I recently disposed of a couple hundred DVD

Re: Looking for North star software

On 07/03/2018 01:58 PM, Fred Cisin via cctech wrote: > On Tue, 3 Jul 2018, Stephen Pereira via cctech wrote: >> I believe that Mike Douglas has a utility program that you can get >> into a Northstar Horizon, and then it can receive a .DSK image sent >> from the terminal and it will write the disk

Re: Looking for North star software

On 07/02/2018 06:27 PM, Fred Cisin via cctech wrote: > On Mon, 2 Jul 2018, dwight via cctalk wrote: >> I have a machine that I'm just now bringing up. I have some boot >> software but it is TSS/A that is the accounting multi-user package. >> I'd really like the TSS/B floppies instead. I'd settle

Re: Modifying microcode

On 06/01/2018 02:46 PM, Antonio Carlini via cctech wrote: > On 01/06/18 18:40, Eric Smith via cctalk wrote: >> On Fri, Jun 1, 2018 at 11:08 AM, Robert Armstrong wrote: >> Eric Smith wrote: The control stores of the 11/785, 8600, and 8650 were entirely WCS. All other VAXen had

Re: micro pdp11/83 power supply

On 05/13/2018 01:51 AM, Waldemar Brodkorb via cctech wrote: > Hi, > > I started to revive an old Micro PDP11/83 I have for over 12 years > now. It is fully assembled and last time I tried to start the > machine it some kind of started. > My biggest issue at the moment is the power supply. > >

Re: 8085 Dissasembly?

On 04/16/2018 03:01 PM, W2HX via cctech wrote: > Hi friends. I have a 1990's vintage commercial radio system that uses an > 80C85A CPU. I am looking to hopefully modify the firmware to make some small > changes in its behavior. The firmware is contained in two EPROMS. > > > Can anyone recommend

Re: NEC TK-80A Ref Manual Wanted

On 03/06/2018 12:09 PM, Bill Degnan via cctech wrote: > Looking for a reference manual to the NEC TK-80A trainer. Rev A. > > This one: > http://bugbookmuseum.blogspot.com/2015/12/computer-tk-80-single-board-8080.html > > Thanks > > Bill So happens I have one of the TK80A and the manual. 

Re: Maxtor full-height 5.25" drives of death

On 02/22/2018 07:45 AM, Ulrich Tagge via cctech wrote: > /Here is my list. 6x RD54 (Maxtor XT2190) >2x OK, 2x Media Error, 1x > Actuator Issue, 1x Head issue 3x RD53 (Micropolis 1325) >2x Actuator > issue, 1x actuator issue followed by spinning issue (speed sensor?) 1325s with head stuck will

Re: Microvax II 'primer'?

On 01/23/2018 07:58 PM, Jules Richardson via cctech wrote: > On 01/22/2018 02:05 PM, allison via cctech wrote: >> >> >> On 1/22/18 2:18 PM, Douglas Taylor via cctech wrote: >>> I can't believe you 'just carry it into the house' all by yourself, >>> unless y

Re: Microvax II 'primer'?

On 1/22/18 2:18 PM, Douglas Taylor via cctech wrote: I can't believe you 'just carry it into the house' all by yourself, unless you are professional athlete. I also have a MicroVax II in the BA123 world box and it has wheels for a reason!  The damn thing weighs 130 lbs! I took it to the VCF

Epson PX-8 specifically TF-10 problem...

I have several Epson PX-8s and i used them.. They work well with the various wedges I have. I also Have a PF-10 which is the portable 3.5" 40 track two side floppy. The problem is it randomly does not turn the media unless I give it a push to get it turning. Things checked: * Batteries, NEW

Re: Any difference between VAX Q-bus and PDP-11 Q-bus cards?

On 12/06/2017 09:55 PM, Jon Elson via cctech wrote: > On 12/03/2017 10:28 AM, Aaron Jackson via cctech wrote: >> I'm looking after a VAX 4000 for a friend, which has a SCSI Q-bus card >> (M5976). If the card did not have the large metal face, would it work in >> a Q-bus PDP-11? We are not going to

Re: Xerox 820

r who got 10 of them. I think mine is >> still in storage somewhere. >> >> >> >> On Wed, Nov 22, 2017 at 4:54 PM, allison via cctech <cctech@classiccmp.org >> >> wrote: >> >>> On 11/21/2017 10:51 AM, Bill Gunshannon via cctech wrote: >>&g

Re: Xerox 820

On 11/21/2017 10:51 AM, Bill Gunshannon via cctech wrote: > Any interest in a Xerox 820 board that never had it's construction completed? > > It's amazing the stuff I find digging through my boxes of junk. > > bill Bill, I'm likely one of the few around that can populate it with period parts.

Re: Drive capacity names (Was: WTB: HP-85 16k RAM Module and HPIB Floppy Drive

On 11/16/2017 03:30 PM, Geoffrey Reed via cctech wrote: > > On 11/15/17, 9:44 AM, "cctalk on behalf of Fred Cisin via cctalk" > wrote: >> Can you name another 20 exceptions? (Chuck and Tony probably can) >> >> >> -- >> Grumpy Ol'

Re: Which Dec Emulation is the MOST useful and Versatile?

On Oct 24, 2017, at 1:44 AM, Kip Koon via cctalk wrote: Hi DEC Enthusiast's, If I were to have to decide on just one model DEC PDP system to run in a DEC Emulator, which one would be the most useful, versatile and has the most software available for it? I have only

Re: The origin of the phrases ATA and IDE [WAS:RE: formatting MFM drives on a IBM PC]

On 10/2/17 10:13 AM, Jules Richardson via cctech wrote: On 10/02/2017 08:29 AM, allison via cctech wrote: On 10/2/17 8:22 AM, Jules Richardson via cctech wrote: On 10/02/2017 01:46 AM, Alan Perry via cctech wrote: There was a call to form the CAM (Common Access Method) Committee of X3T9.2

Re: The origin of the phrases ATA and IDE [WAS:RE: formatting MFM drives on a IBM PC]

On 10/2/17 9:40 AM, william degnan wrote: ATA-IDE and SCSI (OK SASI) are about the same age but had different adoption and growth rates. Earliest SASI/SCSI was AmproLB+ and Visual 1050 with adaptor.  I have both with hard disks. FYI the Z80 powered AMPROLB+ was 1984

Re: The origin of the phrases ATA and IDE [WAS:RE: formatting MFM drives on a IBM PC]

On 10/2/17 8:22 AM, Jules Richardson via cctech wrote: On 10/02/2017 01:46 AM, Alan Perry via cctech wrote: There was a call to form the CAM (Common Access Method) Committee of X3T9.2 (SCSI-2) on 30 Sept 1988 and they first met on 19 Oct 1988. The primary goal was to come up with a SCSI

Re: Ciarcia Micromint

On 07/02/2017 06:54 PM, Fred Cisin via cctech wrote: > On Sun, 2 Jul 2017, John Wilson wrote: >> That sounds like the MPX16? I thought the SB180 was a Z180 thing. > > You're right. > > Sorry > thinking about the wrong one. Yes for sure, as I have both SB180 and BCC180 both are Z180 based. He also

Re: TV Typewriter project nearing completion

On 06/26/2017 11:29 AM, Brad H via cctech wrote: > Thanks Nick! > > I had thought about selling PCBs or creating a kit, but I lack the skill to > draft it in PCB CAD software. The boards I made come from scans of the plans > (on swtpc.com), and I really had to tweak those to get them to work.

Re: Kryoflux or Catweasle

On 05/24/2017 02:19 PM, ben via cctech wrote: > On 5/24/2017 12:30 AM, Chuck Guzis via cctalk wrote: >> On 05/23/2017 05:31 PM, Andrew Harvey via cctalk wrote: >>> I don't think Indivudual Computers make the catweasle any more. They >>> never >>> released a 64bit Windows driver for it. >> >> In

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

On 05/04/2017 07:39 PM, Terry Stewart via cctech wrote: >> And yet, if there were an RX02 somewhere on this VAX, I don't believe > you'd be able to read them at all... RX02 seeming more likely with a VAX. > > Interestingly PUTR, does seem to accommodate this, and the kind of system I > have set up

Re: PDP-8/a cleaning

On 4/25/17 6:06 AM, Pete Turnbull via cctech wrote: On 25/04/2017 10:08, jim stephens via cctalk wrote: On 4/25/2017 1:39 AM, Pete Turnbull via cctalk wrote: "Little residue" would be more accurate, and some of that residue will be water (look up "azeotrope") - plus you need a lot of

Re: PDP-8/a cleaning

On 04/25/2017 03:45 AM, ben via cctech wrote: > On 4/24/2017 1:19 PM, Pontus Pihlgren via cctech wrote: >> Hi >> >> My PDP-8/A is up for restoration. More specifically and 8A100 according >> to it's ID plate. It is in overall "ok" shape but oh so dusty. >> >> I'd like to give it a good cleaning so

Re: Stuffing boards with pulled QFP chips

On 03/31/2017 02:00 PM, Paul Koning wrote: >> On Mar 31, 2017, at 1:51 PM, allison via cctech <cctech@classiccmp.org> >> wrote: >> >> On 03/31/2017 06:32 AM, David Griffith via cctalk wrote: >>>> I'm down to the last few P112 boards for sale and am

Re: Stuffing boards with pulled QFP chips

On 03/31/2017 06:32 AM, David Griffith via cctalk wrote: >> >> I'm down to the last few P112 boards for sale and am pondering >> another run of them because demand is steady. One of the biggest >> challenges for the last run was getting the QFP-packaged 100-pin >> chips[1] in a state such that

Re: Aquired PDP 11/23

On 03/12/2017 04:56 PM, Systems Glitch via cctech wrote: >> Are dectape II tapes expensive? > TU58? They're hard to come by, but the good news is you can *emulate* them > with a PC and a serial port (or USB adapter). That's how I run XXDP on most > of my systems, and pretty much all of the