Re: VAX 780 on eBay

> On Jan 2, 2022, at 4:20 PM, Chris Zach via cctalk > wrote: > > On 1/2/2022 6:21 PM, Mark J. Blair via cctalk wrote: >> I am seriously lusting after that VAX-11/780 system on eBay > I keep thinking about it, but no. The 780 was neat from a historical > perspect

Re: VAX 780 on eBay

In the unlikely event that I win the lottery before that 11/780 batch sells, I'm going to buy it, buy a box truck, go pick it up, and then leave the box truck parked outside while I build a new building to put it all in. :D -- Mark J. Blair Blog:https://www.nf6x.net Git:

Re: 11/785 on ebay (2018) - was Re: VAX 780 on eBay

> On Jan 2, 2022, at 1:03 PM, Toby Thain via cctalk > wrote: > > On 2022-01-02 2:48 p.m., Noel Chiappa via cctalk wrote: >> > From: Jonathan Chapman >> > Last one that went auction-style on eBay went for $1,178.00 >> When was that? >> Do you have any details of the machine's config?

Re: VAX 780 on eBay

The poles supplying my rural property just have one phase of 12kV on them, so even if SCE was willing to provide 3ø service to me, I bet it would be *expensive* to get the whole line upgraded to 3ø service all the way up to the last pole with all three phases present. I think that's probably

Re: tamayatech let down

> On Dec 26, 2021, at 10:00 PM, Chuck Guzis via cctalk > wrote: > > I got a kick out of the eBay sellers flogging logic analyzers without > the pods, advertising them as "working". How can you tell? I guess that at least reveals sellers whose item condition statements cannot be trusted.

Re: PDP-11/44 gas struts

Like Steve, I don't know about the original application. My own 11/44 project pile has the slide out and rotate style of slides, to the extent that it has any slides at all. When I need gas struts and cannot identify a source for exact original replacements, I usually look at McMaster-Carr

Re: DEC BA11-K KY11-L mounting brackets -- how?

I'm not at home with the machine now, but if I remember (or get reminded in the next day or three), I'll try to take some pictures of my PDP-11/34A to help you out. -- Mark J. Blair, NF6X https://www.nf6x.net/

Re: Looking for VAXSET Software Engineering Tools for VMS 4.x

> On Apr 16, 2021, at 11:38 AM, Malte Dehling via cctalk > wrote: > > Whether VAXSET is on there or not, I would be very interested in ISOs of > both of these either way! If Antonio does not mind sharing them a bit more widely, I would also like to have ISOs of them. I'm interested in

Re: misc stuff - free

> On Dec 15, 2020, at 11:09 AM, Johan Helsingius via cctalk > wrote: > > This is one of the reasons why I miss good old USENET - with a public list > of groups, and a clear hierarchy. USENET is still around. But much like the rest of the infinite groups, it's not where everybody is. Sigh.

Re: VT-320 interfacing

> On Nov 9, 2020, at 5:53 PM, Grant Taylor via cctalk > wrote: > >> The VT320 only has the DEC-423 MMJ, no RS-232. > > I /thought/ that Modified Modular Jack was simply a physical thing and > completely independent of Recommended Standard 232. DECconnect (aka MMJ) interface uses RS-423

Re: Unable to download Dave Dunfield's ImageDisk

> On Mar 25, 2020, at 9:22 AM, Seth Morabito via cctalk > wrote: > > On Wed, Mar 25, 2020, at 4:47 AM, Dave Dunfield via cctalk wrote: >> >> Should be fixed now - may have to refresh your browser if It cached >> the bad links. >> >> Dave > > By the way, Dave, I just wanted to say thanks

Re: [HECnet] VAX/VMS 3.0 Distribution Available for Download --> Decnet

> On Mar 21, 2020, at 7:20 AM, R. Voorhorst via cctalk > wrote: > > It looks there is some decnet on the disk. > Exec list gives phase-III router: Which VMS release introduced DECnet Phase IV? -- Mark J. Blair http://www.nf6x.net/

Re: PDP - 8 Front panels

> On Nov 28, 2019, at 2:40 AM, Rod Smallwood via cctalk > wrote: > > Hello Everybody > > After a two year pause due to my wife having been ill but now fully > recovered I am back to starting making pdp-8 front panels again Welcome back! -- Mark J. Blair, NF6X http://www.nf6x.net/

Re: flux to imd

The list isn’t broken. This thread started off-list, and the Chuck CC’d the list late in the thread. -- Mark J. Blair http://www.nf6x.net

TU58 Archival (Was: Re: Tektrionix VAXBI board and DC100 training tapes?)

> On Sep 21, 2019, at 12:17 PM, Mattis Lind wrote: > > I dumped some 40 TU58 tapes a year ago. I replaced the band directly with 90 > mm plastibands without even trying to run the tape. This was my procedure: > Open up the tape cartridge. Then the old band was removed carefully by >

Re: Tektrionix VAXBI board and DC100 training tapes?

> On Sep 21, 2019, at 11:19 AM, Al Kossow via cctalk > wrote: > I've got over a hundred TU58s I need to look at some day as well. > Fixed the pinch rollers on some TU58s a year or two ago, just too many other > things to do. I have about a dozen TU58 cartridges which came with my

Re: Tektrionix VAXBI board and DC100 training tapes?

> On Sep 19, 2019, at 12:45 PM, Mattis Lind via cctalk > wrote: > > Then there were some DC100 tapes in a huge heap of TU58 diagnostic tapes > for VAX-11/730 and VAX-11/750 that looked different. [...] > BTW. What are the status of various 11/730 and 11/750 diagnostics on TU58. > Are those

Shugart-Interface 8" Floppy Diskette Drive Configurability

I've been contemplating a floppy diskette drive emulator with features to make it fit better into systems using 50-pin Shugart style floppy drive interfaces vs. the other emulators already on the market. Studying manuals for various 8" floppy diskette drives, I see that they generally provided

Re: TRS-80 Fireworks

> On Aug 28, 2019, at 2:07 AM, Guy Dunphy via cctalk > wrote: > An extremely common problem with all old electronics from around that era. > The mains filter caps are commonly 'RIFA' brand metalized polyester film, > encapsulated in a clear-honey-coloured resin. > The problem is that the

Re: Pertec Interface Cable Length

> On Aug 10, 2019, at 1:57 AM, Dave Wade via cctech > wrote: > >> >> I have a question about cable length - any electrical engineers in the house? > > Its electronics, rather than electrical engineering. Electrical Engineering > is power distribution. At least in the US, "Electrical

Re: Announcing Cadetwriter

> On Aug 1, 2019, at 9:15 AM, Dave Babcock via cctech > wrote: > > Cadetwriter is being released. [Cadetwriter is the official name of our > general-purpose, Wheelwriter-based Computer Terminal.] The public unveiling > will be at this weekend's VCF West at the Computer History Museum in

Re: Scotch 777 "blue label" tape blues confirmed

> On Jul 20, 2019, at 9:38 AM, Chuck Guzis via cctalk > wrote: > > your cleaning machine I do not have a cleaning machine. Do you suppose a cyclomethicone applicator fabricobbled into the tape path of a tape drive might work? I haven't encountered these sorts of issues in 9-track tapes

Re: WordPerfect 5.1+ for VMS

> On Jul 17, 2019, at 10:43 PM, Dave Wade via cctalk > wrote: > I think even if you have the key it fails today. There was a thread recently > on comp.os.vms > > Saying it expires after days and theirs had just expired... Oh, now that's just obnoxious. Requiring a license refresh

Re: DEC Purchase Specifications, particularly 23-000A9-01

> On Jul 17, 2019, at 3:56 PM, Eric Smith via cctalk > wrote: > > I expect that 70ns doesn't meed the DEC purchase specification for > 23-000A9-01, but unless we turn up a copy of the actual purchase > specification, we won't really know. It seems likely that the purchase > specification

Re: DEC Purchase Specifications, particularly 23-000A9-01

At 70ns, I can make the design pretty simple by using an EEPROM. I did some trial synthesis targeting a Lattice MachXO2 part, and I think I could get the speed down into the 20ns range that way, at the cost of a more complex board design and needing to use Lattice's synthesis tool to prepare

Re: DEC Purchase Specifications, particularly 23-000A9-01

> On Jul 17, 2019, at 1:20 AM, Paul Birkel wrote: > From some notes (origin misplaced!) you'll need a typical access time of > 40ns from address, or 20ns from /CS: Thank you! That rules out using a 70ns EEPROM, then. I think I have a line on most of the bootstrap PROMs that I will need, but

DEC Purchase Specifications, particularly 23-000A9-01

I've been studying scanned documents for the M9312 UNIBUS bootstrap/terminator card because of reasons. They refer to Digital Equipment Corporation Purchase Specifications 23-000A9-01 and 23-000F1-01 for the PROMs, and I'm wondering whether those documents have been preserved anywhere? I'd love

Re: Posting of set of boards from a data General nova 3 triple option

> On Jul 12, 2019, at 9:27 PM, Jeffrey Birkin via cctalk > wrote: > > I have a set of boards from a data General nova 3 triple option > Location: Vancouver Island Canada > If interested please email jeffreybir...@hotmail.com I have a Nova 3 system, but I am not familiar with what the

Emulex SC11 Documentation Wanted

I'm looking for documentation covering a board set which came with my new PDP-11/34A. It looks like an Emulex SC11 disk controller, but it appears to be a newer version than what is covered in the 1979 manual scan which I found on Bitsavers. I have pictures of the board set on my blog:

Re: Recovering the ROM of an IBM 5100 using OCR (among other things)

> On Jun 27, 2019, at 8:21 AM, Warner Losh via cctalk > wrote: > > Back when I got to school and I was hanging around the computer room on > campus (back when it was THE room on campus with computers), I saw this > half-dollar sized plastic fob on the desk and asked what it was for. The >

Re: Kids these days...

I wouldn’t invest in an IoT buzzword company whose web page admits that the products they are talking about don’t exist yet, headed by a non-engineer, even without the fishy international money laundering smell. It’s interesting how quickly you ferreted that out, William. I don’t have a clue

Re: 9-Track Magtape Drive ID

> On Jun 1, 2019, at 4:22 PM, Steve Malikoff via cctalk > wrote: > > BTW If the old rubber rings one the hubs are too > expanded and won't allow a tape reel to slide on, just replace with a # BS336 > O-ring > from a bearings/seals/gasket shop. These are cheap, readily available and > takes

Re: 9-Track Magtape Drive ID

> On Jun 1, 2019, at 15:27, John H. Reinhardt via cctalk > wrote: > > Congrats!! Should be fun to play with. I just picked up a Micro PDP-11/53 > which is about the biggest I can fit into my office/computer room. lol > Neat! I’d like to get a PDP-11 in that form factor someday.

Re: 9-Track Magtape Drive ID

> On Jun 1, 2019, at 14:57, John H. Reinhardt via cctalk > wrote: > Is this the system that was on Reddit? Yes. I’ll be fetching it next weekend. I’m excited! I wonder if the hard drive is still usable, and if there is anything interesting on it? By a chance meeting with my neighbor today, I

Re: 9-Track Magtape Drive ID

Cool. So that means that this 11/34A has more backplane slots than the base model? The programmer panel is also appealing. I presume that the Kennedy 9000 doesn’t have a Pertec interface, then? It remains to be seen whether I ever start my 11/44 restoration vs. moving it along to another

Re: 9-Track Magtape Drive ID

Thanks! I am taking the whole system. It's in a rack with a PDP-11/34A, a System Industries 9400 controller, and what looks to me like a Fujitsu M228x series hard drive: https://pbs.twimg.com/media/D77fRMFU0AEQtSO.jpg I grabbed the M228x manuals from Bitsavers to look up how the spindle and

9-Track Magtape Drive ID

Does anybody here recognize the make and model of this tape drive? https://pbs.twimg.com/media/D7_mfdfUIAMcTly.jpg -- Mark J. Blair, NF6X http://www.nf6x.net/

Re: Newbie Punch Tape Questions

> On Dec 24, 2018, at 11:33 AM, Columbia Valley Maker Space via cctalk > wrote: > > The Mylar reel would have been the programming for a CNC machine. I > suspect the first part of the reel may be some boot loader or init > routine. I could definitely be mistaken, but my first guess would

Re: VAX 9440

What a majestic system! When I saw the teaser picture of the backs of racks on Twitter, I was assuming something in the 11/78x series. I don't know anything about the 9440 yet, so it'll be fun to read up on that. -- Mark J. Blair, NF6X http://www.nf6x.net/

Re: desoldering (was Re: VAX 9440)

On the topic of desoldering tweezers: I don't like them. I've done tons of rework of components down to 0201 size. I consider 0201 to be difficult, but I found that once I could work on 0201 components at all, 0402 suddenly seemed easy to work with! Anyway, the tweezers I've used had poor tip

Re: Advice requested on proper disposal of Seagate ST3000DM001 disk drives

How about removing the (presumably aluminum) platters, case castings, and any other aluminum parts, grinding it all down to fine aluminum flakes, making thermite out of that, then using it to slag the rest of the non-aluminum parts? Then shoot the slag pile with a .50 BMG. Then drop that

Re: Fall cleaning - 9-track drives available

> On Sep 21, 2018, at 7:44 PM, Bob Rosenbloom via cctalk > wrote: > > > All are located in Santa Cruz, CA and need to be gone soon, I need the room > in my hangar. Come get them! > > Photos here: http://dvq.com/fall_cleaning/ If I'm not mistaken, that CDC drive uses the same mechanism as

Re: Fall cleaning - 9-track drives available

I'm sure relieved that you didn't say "DEC TU77 drive" and "near Riverside, CA", because I lack spare cash, empty floor space, and impulse control! :) -- Mark J. Blair http://www.nf6x.net/

Re: Oddball Terminals (Was: Re: VT100's)

That’s it! The terminal I had was definitely the one in this picture: http://bitsavers.org/pdf/dec/terminal/vt02/vt02_1.jpg -- Mark J. Blair http://www.nf6x.net

Re: Oddball Terminals (Was: Re: VT100's)

Thanks for digging that up! I had never managed to google up any details before. -- Mark J. Blair http://www.nf6x.net

Re: Oddball Terminals (Was: Re: VT100's)

> On Sep 7, 2018, at 8:41 AM, Bob Rosenbloom via cctalk > wrote: > > The display was most likely a Tektronix 611. DEC used them with their point > plot display systems like the VC8E. I am pretty sure that the display was a 611 in its vertical configuration:

Oddball Terminals (Was: Re: VT100's)

A long time ago, I had the incomplete remnants of an oddball terminal which I retrieved from a junk pile at a small, obscure school in Pasadena. I'll try to describe it as best I can, based on old memory. I could have sworn that it had a dataplate label identifying it as a DEC VT02, but that

Re: Pdp 11/34 System for sale in Riverside,ca

> On Aug 1, 2018, at 8:32 AM, Wayne S via cctalk wrote: > > http://www.ctonlineauctions.com/detail.asp?id=746466 > > From the pictures it looks to be a fairly complete system with Kennedy tape > drive. > Has a System industries controller but doesn't appear to have a disk drive. Looks like

Re: Pdp 11/34 System for sale in Riverside,ca

Ok, I've studied the pictures carefully and given it some deep consideration, and I've decided that I do not want it. I hope that somebody adopts it! Judging by the power tools that are also listed in the same event, I'd say that the person whose estate this is from was definitely One Of Us.

Re: Pdp 11/34 System for sale in Riverside,ca

It looks lovely, and I live just outside the Riverside city limits. I'm awfully short on both money and indoor storage space right now, though. :( -- Mark J. Blair, NF6X http://www.nf6x.net/

Re: Thicknet/10base5 Test Segment: The Cable is In!

> On Jun 25, 2018, at 2:20 PM, systems_glitch via cctalk > wrote: > I do have a very > few NOS Cabletron ST-500-01 transceiver/non-intrusive tap kits as well. What does non-intrusive mean in this context? I thought that thick ethernet taps always required drilling a hole in the cable. --

Re: CDC 6600 display character generation

> On Jun 6, 2018, at 11:50 PM, Rick Bensene via cctalk > wrote: > > Believe me, the console did spit out a lot of sparks and little blobs of > molten metal, along with quite a bit of smoke. I still have a small > scar on my left leg where one of the little blobs of metal burned me > after

Re: Modifying microcode

> On Jun 3, 2018, at 7:37 PM, Ethan Dicks via cctalk > wrote: > > We used to purchase 11/725s for parts to keep our 11/730 running. > Much cheaper because "nobody" wanted an 11/725 in the early 90s (I > still have one. I wish I could afford a Unibus controller to replace > the KLESI/U and

Re: I ran across this strange modernistic? Data General ...odd?

> On May 26, 2018, at 9:38 AM, Bruce Ray via cctalk > wrote: > > And 'yes', Novas and its derivatives are still used today... That's news to me, and it sounds quite interesting. Would you mind elaborating on that? -- Mark J. Blair, NF6X

Re: (OT) Re: Is This A Shill?

On May 2, 2018, at 09:08, Chuck Guzis via cctalk wrote: > > Although eBay in the past has tried to kill off sniping because it > reduces the number of visits an individual might pay to their site, I > think they've given up with trying to kill the sniping system. If eBay

Re: TRS-80 Fragmentation

> On Apr 26, 2018, at 14:25, Geoffrey Oltmans via cctalk > wrote: > > TRS-80 Model II and 16, 68k based "business" machines The Models II and 12 were Z80 based machines. The models 16 and 6000 were the same Z80 based machines with 68k subsystems added via additional

Re: Rick Dickinson, ZX Spectrum designer, RIP

Over here in the US, I remember seeing the Sinclair QL in a magazine (probably Byte?) and thinking it looked exotic and interesting. I thought the little tape drives looked neat, and didn’t know enough to appreciate how much better a floppy drive would have made the system. I have no regrets

Re: new disassembler vs IDA (was Re: 8085 Dissasembly?)

> On Apr 19, 2018, at 9:19 AM, Eric Smith via cctalk > wrote: > > For the 1802, I've used a really crude disassembler written in C. The 1802 > instruction set isn't very complicated, so a disassembler for it isn't > either. It's been so many years since I actually

Re: 8085 Dissasembly?

> On Apr 18, 2018, at 2:50 AM, Torfinn Ingolfsen via cctech > wrote: > > Since it has not been mentioned yet: NF6X's dismantler supports the > 8085 (and a couple of other CPUs): https://github.com/NF6X/dismantler > It is written in Python, so it should run on any

Software for AN/UGC-144 Communications Terminal?

I posted this originally on the ArmyRadios mailing list, but I think it's just computery enough that it may be of interest here, too. And maybe somebody here even has the answers to my questions! I just got an AN/UGC-144 communications terminal. It looks unused, and it came with cables and

Re: Identifying vacuum tube module

> On Mar 25, 2018, at 12:34, Kyle Owen via cctalk wrote: > > Anyone knows what these go to? > > https://imgur.com/a/CpxLs If the 5815 is a Federal Supply Classification, then the module would most likely be used in some sort of teletype or

Re: IBM 6094-010 "Dials" protocol?

> On Mar 24, 2018, at 22:29, Michael Brutman via cctalk > wrote: > > Picture here: https://i.imgur.com/ClCw070.jpg > Neat! I haven't seen one of those since 1987, when I briefly played with a workstation that had one of those in an

Re: WTB Intel 7110 Bubble Memory Subsystem or Chipset

> On Feb 23, 2018, at 07:11, Anders Nelson wrote: > > That's one of the most beautiful machines I've ever seen! Are they > rare/expensive? (I'm guessing yes) Yes to both! I don't know how many are out in the wild today, and I don't know how many were made. I don't

Re: WTB Intel 7110 Bubble Memory Subsystem or Chipset

> On Feb 22, 2018, at 2:33 PM, Eric Smith via cctalk > wrote: > > If you do lose the formatting of an Intel 7110 bubble memory device, to > reformat it you need something Intel called a "seed module". The > instructions to build a seed module are in the BPK72 manual.

Re: A couple of RL02 questions

> On Jan 28, 2018, at 20:56, Marc Howard via cctalk > wrote: > > I've got two RL02 units. One is a parts unit and has an access plate for > the door solenoid. I can open it. The other has no access plate nor is > there a cutout for one. How do I open this cover with

Re: ultrasonic cleaning for disk heads

Speaking of these drives, I have a single decpack cartridge which hitchhiked along with a purchase of RL02 packs. It's marked "decpack 2200 BPI-12" and has 12 sector notches in the hub. Does that mean that it was most likely used with an RK05 drive in a PDP-11 system? I seem to recall that

Re:

> On Jan 27, 2018, at 10:23, Adrian Stoness via cctech > wrote: > > ipa as in beer? Isopropyl alcohol. Not very good for drinking; even store-brand vodka in plastic jugs is less harsh. :) -- Mark J. Blair, NF6X http://www.nf6x.net/

Re: ultrasonic cleaning for disk heads

I thoroughly enjoyed Marc's video of the head cleaning. Some dumb questions from a guy who has not yet experienced his first head crash on a removable-pack hard drive: When it happens, am I correct in assuming that the pack is toast, and should never be loaded again? My removable-pack drives

Re: A walk through of my legendary warehouse sale in the 1990s.

> On Jan 20, 2018, at 18:26, Paxton Hoag via cctalk > wrote: > > This is a digitized HI8 tape of a walk through of an early Warehouse Sale I > ran from 1995 to 1998. There is a small sections of collectable computers > in the middle of the tape with a few others

Re: DECtape madness

> On Jan 13, 2018, at 08:52, Bill Gunshannon via cctalk > wrote: > > So, where were all these people when I was trying to clean out > my old house a couple years ago? I threw out piles of tapes of > various formats because I couldn't find anyone to take them for >

Re: QSIC update and request

This looks pretty interesting! I think I've managed to miss previous discussion of it. I wonder if it might also be useful in any of the QBUS MicroVAXen? -- Mark J. Blair, NF6X http://www.nf6x.net/

Re: Attaching SIMH devices without halting simulation?

> On Dec 31, 2017, at 5:07 PM, J. David Bryan via cctalk > wrote: > > > You mentioned that you "tried putting the system console on a telnet port," > so you might have used the "SET CONSOLE TELNET" command (section 3.14 in > the user's guide). Ah, yes, I think that's

Re: Attaching SIMH devices without halting simulation?

> On Dec 31, 2017, at 14:10, william degnan wrote: > > I thought you set all devices you planned to use "online" so you could mount > them later? I don't simh vax much so thanks for the correction as to the > procedure. I mostly do pdp8 or pdp11 stuff, or esoteric

Re: Attaching SIMH devices without halting simulation?

> On Dec 31, 2017, at 13:52, J. David Bryan wrote: > > See section 3.15, "Remote Console" in the SIMH User's Guide. The "SET > REMOTE TELNET" command will allow you to attach and detach while the > simulator is running. That appears to work perfectly. I don't know what I

Re: Attaching SIMH devices without halting simulation?

> On Dec 31, 2017, at 13:47, william degnan wrote: > > Yes, but you were not able to attach in your startup script? That's when to > do it. > It's common practice, and frequently a necessity, to mount media such as tapes without rebooting the machine they're being

Attaching SIMH devices without halting simulation?

I've been experimenting with the SIMH VAX simulators a lot lately. The only way I know of to mount a tape, disk pack, CD-ROM, etc. after boot time is to halt the simulation with ^e to get to the SIMH command prompt, ATTACH the desired image, and then resume the simulation with CONTINUE. Is

Re: Dec-10 Day announcement from Living Computers: Museum + Labs

> On Dec 10, 2017, at 00:21, Rich Alderson via cctalk > wrote: > > Happy DEC-10 Day! > > It is my honor to announce that we at Living Computers: Museum + Labs > are releasing to the computing community our Massbus Disk Emulator > and all the associated software. This

Re: WTB: HP-85 16k RAM Module and HPIB Floppy Drive

> On Nov 15, 2017, at 8:27 PM, Curious Marc wrote: > >> I think that the upgraded B model ROMs in the PRM-85 are supposed to let it >> use the newer drives. > Yes it does. I have an HP 85A, the PRM 85 and a 9122, and that combo works > beautifully. I am not sure I

Re: "Personal" Computers (Was: Details about IBM's early 'scientific' computers)

> On Nov 15, 2017, at 5:09 PM, Paul Koning via cctalk > wrote: > > > Earlier, there was the SAGE computer (the air defense one, not the PC by the > same name), which had built-in ash trays at each operator station. With all of the possibly apocryphal stories of

Re: WTB: HP-85 16k RAM Module and HPIB Floppy Drive

> On Nov 15, 2017, at 4:45 PM, Eric Schlaepfer wrote: > > It'd be interesting to find out how well that PRM-85 works. I've laid out a > board for a rough equivalent but I haven't fabbed it out. It may be cheaper > for me to buy that instead. > > I've also got a 9122C but I

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

> On Nov 15, 2017, at 09:44, Fred Cisin via cctalk > wrote: > >>> No, the 9122C model has two 1.44M drives. HP made several earlier 3.5" > On Wed, 15 Nov 2017, Christian Corti via cctalk wrote: >> No, the 9122C has two high-density, two-sided 80 cylinder drives. A drive

Re: WTB: HP-85 16k RAM Module and HPIB Floppy Drive

> On Nov 15, 2017, at 09:33, Paul Berger via cctalk > wrote: > > 720K media is pretty easy to get as well, I bought 100 "used" disks from > floppydisk.com, and it is hard to tell they have ever been used and I have > not had any problems with them. I also bought a lot

Re: WTB: HP-85 16k RAM Module and HPIB Floppy Drive

> On Nov 15, 2017, at 01:31, Christian Corti via cctalk > wrote: > > No, the 9122C has two high-density, two-sided 80 cylinder drives. A drive has > no capacity, this is the function of the on-disk format. > ;-) Ah! That's technically correct, which is, of course, the

Re: WTB: HP-85 16k RAM Module and HPIB Floppy Drive

> On Nov 14, 2017, at 10:57 PM, Ed Sharpe via cctalk > wrote: > > you have me real curious,as to what is in that padded hp case.. What are you referring to? -- Mark J. Blair, NF6X http://www.nf6x.net/

Re: WTB: HP-85 16k RAM Module and HPIB Floppy Drive

> On Nov 14, 2017, at 20:44, Ed Sharpe via cctalk wrote: > > remember too.. there were hpib 8 inch and 5 inch drives wish I had saved > some!!! Those would certainly interest me if I happen upon any at a price that I like. Same goes for an HPIB 9 track tape

Re: WTB: HP-85 16k RAM Module and HPIB Floppy Drive

> On Nov 14, 2017, at 20:33, Ed Sharpe via cctalk wrote: > > ok back in my day.. I do not think 85 adressed modern drive of 1.44 meg..? so > that was what I was going on.. yes if you can use 1.44 do so.. older new > media hard to find... I am still new to this HP-85

Re: WTB: HP-85 16k RAM Module and HPIB Floppy Drive

> On Nov 14, 2017, at 20:11, Ed Sharpe via cctalk wrote: > > wondervifcthec9122 drives,will work on 85? > I think I can guess what you meant to say there... :) I’ve ordered a PRM-85 (a modern reprogrammable ROM drawer replacement) which includes the HP-85B version of

Re: WTB: HP-85 16k RAM Module and HPIB Floppy Drive

> On Nov 14, 2017, at 7:24 PM, Ed Sharpe via cctalk > wrote: > > try 9121 drives!!!. ed! No, thanks. I'd like a 9122C drive. -- Mark J. Blair, NF6X http://www.nf6x.net/

Re: WTB: HP-85 16k RAM Module and HPIB Floppy Drive

> On Nov 14, 2017, at 6:35 PM, Paul Berger via cctalk > wrote: > > Well I do have a surplus 9122C however only one drive works and I am on the > other side of the continent. Hmm, I'll consider yours if a more workinger one doesn't appear. That locational thing can be

Re: WTB: HP-85 16k RAM Module and HPIB Floppy Drive

> On Nov 14, 2017, at 5:24 PM, william degnan wrote: > > Those drives are 720 each 3.5". No, the 9122C model has two 1.44M drives. HP made several earlier 3.5" drive units with either 360k or 720k drive capacities. I don't have a compatible IEEE-488 card for use with

WTB: HP-85 16k RAM Module and HPIB Floppy Drive

I just got my HP-85 working for the first time over the weekend (except for its tape drive, which is still a work in progress). I'd like to acquire some accessories for it: 1) HP 82903A 16k RAM module 2) HP 9122C dual 1.44M 3.2" floppy diskette drive Do any of y'all have either of those items

Re: RL02 Spinup fails

> On Nov 6, 2017, at 10:21, Aaron Jackson via cctalk > wrote: > > I based my terminator off Mark > Blair's RL02 to USB project: > > https://github.com/NF6X/RL02-USB/blob/master/pcbs/RL02-USB-terminator/RL02-USB-terminator.pdf Hi there! Just one warning: My project

Re: Wanted: small composite CRT monitor

I suggest that you keep your eyes open for a small CRT-based CCTV monitor. Possible sources include eBay, Craigslist, Goodwill, etc., as well as folks on lists like this one. I've been looking for an old Sanyo VM-4209 or VM-4509 monochrome monitor for a while, to put on my SOL-20. One of those

Re: The Name of the disk (Was: Disk imaging with IMD - question

> On Aug 9, 2017, at 12:08, Fred Cisin via cctalk wrote: > > [...] > I'm keeping your rant as reference material. Thanks! The Tandy Portable Disk Drive (TPDD) for the Model 100 series is one of the odd-ball "rare" configurations: 3.5", 40 track (later, 80 track on

Re: Convex documentation online (C220 arrived)

> On Aug 7, 2017, at 12:13 AM, Camiel Vanderhoeven > wrote: > > That would have been the CPU cabinet for the C240 (which is twice as wide > as the C220¹s CPU cabinet. The C240¹s CPU consumes - i.e. converts to heat > - about 20 kilowatts of power, so that

Re: Convex documentation online (C220 arrived)

Wow! I fondly remember the air exhaust from the power supply cabinet of the Convex C240 as being the warmest spot in the UCI computer room at 6AM, when the main Computer Science building A/C turned on and the computer room temperature plummeted. Maybe I should finally learn how to use one for

Re: Cipher F880 with S100 interface card on local CL

> On Jul 10, 2017, at 09:15, Jon Elson via cctalk wrote: > > You could do a controller using the Beagle Bone black and the PRU devices, > which are 200 MHz 32-bit microcontrollers built into the Bone's processor. That's the scheme I have in mind for making a Pertec

Re: tape baking

> On Jul 6, 2017, at 3:34 PM, jim stephens via cctalk > wrote: > > > > On 7/6/2017 10:59 AM, Chuck Guzis via cctalk wrote: >> Go figure. Perhaps nobody owns a line printer that takes continuous >> forms any more. > I'm moving a Data Products 2230 this weekend. Oooh,

Re: tape baking

> On Jul 6, 2017, at 11:50 AM, Chuck Guzis via cctalk > wrote: > > I've uploaded the files to my Box account: > > https://app.box.com/s/liuljs46noaz58grdwuj170mjh66qzm8 > > I have the permission of the owner to share these. Note that many of > them depend upon

Re: tape baking

> On Jul 6, 2017, at 12:42 PM, Rob Jarratt wrote: > > > Why not give baking a go then? Or have I missed something? I would of course > recommend trying with an unimportant tape first until you get a time and > temperature that works for your setup. Oh, it's on my

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