Re: PDP-11/60 manuals needed
On Wed, Feb 27, 2019 at 5:09 PM Noel Chiappa via cctalk wrote: > > From: Ethan Dicks > > Is it by any chance EK-KD11K-TM-001? > > > That part number is for a print-set > > Uhh, no. Looking at the fiche version, EP-KD11K-TM-001, it has lots and lots > of text blocks (which I can't read without a fiche reader, of course). Ah... I've seen Tech Manuals printed as 2-up on C-sized paper, sometimes with interstitial 11"x17" drawings that would have been fold-outs in 8.5"x11" format. > We do seem to have the print sets: > > MP00166 11/60 System (chassis, power contoller, etc) > MP00409 KD11-K CPU > MP00500 WCS (M7870) > MP00429 FP11-E Cool (MPx should be Maintenance Prints) > but I'm not desperate enough to learn the -11/60 by looking at them! Totally fair. > > I'm following the discussion because I have the two BA11 cabinets for > > an 11/60, the PSUs, and the front panel (I'm missing the rack). > > And by 'the rack', I'm guessing that includes the backplane? Looking through > the prints, I think I didn't see details on it (alas). No... "the rack" is just the outer box with rails (not an H960 - whatever the designation is for the odd 11/60 cabinet). The backplanes are in the BA11s. I seem to have both MOS and core memory and, I am fairly sure, an RK611, along with the CPU. I need to take a module inventory. -ethan
Re: PDP-11/60 manuals needed
my recollection of the JO KD11-K is dusty. It was under development at the same time my group was working on the DMC/KMC11 products. The similarity of the /60 and the DMC/KMC was the fact that they were both based on Harvard architecture implementations. . A Harvard arch implementation of the PDP11 ISP is an interesting challenge. On Wed, Feb 27, 2019 at 5:09 PM Noel Chiappa via cctalk wrote: > > > From: Bill Degnan > > > The 11/60 handbook doesn't have that kind of designation. It's EB06498 > > Yeah, that's the processor handbook, which is the paperback-sized thing which > is mostly a programmer's reference; I've got that, its the 8-1/2x11 sized > things I'm after. > > > > From: Ethan Dicks > > > Is it by any chance EK-KD11K-TM-001? > > > That part number is for a print-set > > Uhh, no. Looking at the fiche version, EP-KD11K-TM-001, it has lots and lots > of text blocks (which I can't read without a fiche reader, of course). > > We do seem to have the print sets: > > MP00166 11/60 System (chassis, power contoller, etc) > MP00409 KD11-K CPU > MP00500 WCS (M7870) > MP00429 FP11-E > > but I'm not desperate enough to learn the -11/60 by looking at them! > > > I'm following the discussion because I have the two BA11 cabinets for > > an 11/60, the PSUs, and the front panel (I'm missing the rack). > > And by 'the rack', I'm guessing that includes the backplane? Looking through > the prints, I think I didn't see details on it (alas). > > Noel
Re: PDP-11/60 manuals needed
> From: Bill Degnan > The 11/60 handbook doesn't have that kind of designation. It's EB06498 Yeah, that's the processor handbook, which is the paperback-sized thing which is mostly a programmer's reference; I've got that, its the 8-1/2x11 sized things I'm after. > From: Ethan Dicks > Is it by any chance EK-KD11K-TM-001? > That part number is for a print-set Uhh, no. Looking at the fiche version, EP-KD11K-TM-001, it has lots and lots of text blocks (which I can't read without a fiche reader, of course). We do seem to have the print sets: MP00166 11/60 System (chassis, power contoller, etc) MP00409 KD11-K CPU MP00500 WCS (M7870) MP00429 FP11-E but I'm not desperate enough to learn the -11/60 by looking at them! > I'm following the discussion because I have the two BA11 cabinets for > an 11/60, the PSUs, and the front panel (I'm missing the rack). And by 'the rack', I'm guessing that includes the backplane? Looking through the prints, I think I didn't see details on it (alas). Noel
Re: PDP-11/60 manuals needed
On Wed, Feb 27, 2019 at 1:04 PM Ethan Dicks via cctalk < cctalk@classiccmp.org> wrote: > On Wed, Feb 27, 2019 at 3:10 PM Bill Degnan via cctalk > wrote: > > > Yes, it almost certainly is (without seeing it, I can't be 100%, but it > > > sounds like it is). Is it by any chance EK-KD11K-TM-001? > > That part number is for a print-set, specifically the Technical Manual > for the KD11K processor, revision 1. > > > The 11/60 handbook doesn't have that kind of designation. It's EB06498 > > That is a paperback. > > Correct. It's like all the other DEC handbooks from that era, printed on that lovely grade triple-Z paper that falls apart if you look at it wrong. This one's held together better than most. Happy to send it to Noel if it's actually of use. - Josh > I'm following the discussion because I have the two BA11 cabinets for > an 11/60, the PSUs, and the front panel (I'm missing the rack). There > is scant info out there and I'm interested in anything that turns up. > > -ethan >
Re: PDP-11/60 manuals needed
On Wed, Feb 27, 2019 at 3:10 PM Bill Degnan via cctalk wrote: > > Yes, it almost certainly is (without seeing it, I can't be 100%, but it > > sounds like it is). Is it by any chance EK-KD11K-TM-001? That part number is for a print-set, specifically the Technical Manual for the KD11K processor, revision 1. > The 11/60 handbook doesn't have that kind of designation. It's EB06498 That is a paperback. I'm following the discussion because I have the two BA11 cabinets for an 11/60, the PSUs, and the front panel (I'm missing the rack). There is scant info out there and I'm interested in anything that turns up. -ethan
Re: Another DEC UNIBUS signal adapter: UniProbe
Did you happen to take a look at my UA11? It’s different in that it goes into an SPC slot. TTFN - Guy > On Feb 26, 2019, at 11:07 PM, Jörg Hoppe via cctech > wrote: > > Hi, > > most people dealing seriously with older PDP-11s have found means to monitor > the UNIBUS traffic. > My latest approach is www.retrocmp.com/tools/uniprobe > UniProbe is a M9302 terminator, a LED display, a probe for logic analyzer. > It can be mounted in Standard or Modified UNIBUS sockets. > > I'm ordering a batch of PCBs in a few days and will show this and other stuff > (UniBone, BlinkenBone) at VCFPNW in Seattle. > https://vcfed.org/wp/festivals/vintage-computer-festival-pacific-northwest/ > > best regards, > Joerg >
Rainbow 100 PSU capacitor list
Hi, I think that I need to re-cap the power supply in a Rainbow 100. Does anyone here know if anyone has put together a list of capacitors used in the power supply that I can use to order parts? alan
Re: Another DEC UNIBUS signal adapter: UniProbe
Hi, Did you happen to take a look at my UA11? It’s different in that it goes into an SPC slot. Yes, I was pointed to it after UniProbe was out. Good I saw it not earlier, would have killed my project ;-) best regards, Joerg TTFN - Guy On Feb 26, 2019, at 11:07 PM, Jörg Hoppe via cctech wrote: Hi, most people dealing seriously with older PDP-11s have found means to monitor the UNIBUS traffic. My latest approach is www.retrocmp.com/tools/uniprobe UniProbe is a M9302 terminator, a LED display, a probe for logic analyzer. It can be mounted in Standard or Modified UNIBUS sockets. I'm ordering a batch of PCBs in a few days and will show this and other stuff (UniBone, BlinkenBone) at VCFPNW in Seattle. https://vcfed.org/wp/festivals/vintage-computer-festival-pacific-northwest/ best regards, Joerg
Re: PDP-11/60 manuals needed
Ho Noel, 2485 "11/60" text items in the CHM Collection here: https://www.computerhistory.org/collections/search/?s=11%2F60=text HTH - Lee C. On Wed, Feb 27, 2019 at 11:38 AM Noel Chiappa via cctalk < cctalk@classiccmp.org> wrote: > Hi, does anyone have any PDP-11/60 manuals? I went to do articles on the > -11/60 and its CPU (KD11-K), but there isn't much online. > > Bitsavers has EK-KD11K-TD-PRE, but it only covers the maintenance features, > not the whole CPU; there is a tech manual - KD11K-TM-001 (I have it in > fiche, > but my fiche reader has a burned out bulb which I have not yet been able to > replace, so it doesn't do me much good). There is a user manual for the > FP11-E, which has a certain amount of useful details, but it refers to the > technical manual, which is not there. And there's EK-11060-SV-01, which > covers > the cabinet and power supply. > > So if anyone has the general -11/60 manual, or the KD11-K tech manual, > those > would be super useful. The FP11-E tech manual would be nice to have, but > isn't > as important as the others. > > Thanks (I hope!)! > >Noel > -- Lee Courtney +1-650-704-3934 cell
Re: PDP-11/60 manuals needed
> > > > > Yes, it almost certainly is (without seeing it, I can't be 100%, but it > sounds > like it is). Is it by any chance EK-KD11K-TM-001? > > Thanks! > > Noel > The 11/60 handbook doesn't have that kind of designation. It's EB06498
Re: PDP-11/60 manuals needed
> From: Josh Dersch > I recently picked up a copy of the PDP-11/60 Processor Handbook, not > sure if that's useful for your research Yes, it almost certainly is (without seeing it, I can't be 100%, but it sounds like it is). Is it by any chance EK-KD11K-TM-001? Thanks! Noel
Re: PDP-11/60 manuals needed
On Wed, Feb 27, 2019 at 11:38 AM Noel Chiappa via cctalk < cctalk@classiccmp.org> wrote: > Hi, does anyone have any PDP-11/60 manuals? I went to do articles on the > -11/60 and its CPU (KD11-K), but there isn't much online. > > Bitsavers has EK-KD11K-TD-PRE, but it only covers the maintenance features, > not the whole CPU; there is a tech manual - KD11K-TM-001 (I have it in > fiche, > but my fiche reader has a burned out bulb which I have not yet been able to > replace, so it doesn't do me much good). There is a user manual for the > FP11-E, which has a certain amount of useful details, but it refers to the > technical manual, which is not there. And there's EK-11060-SV-01, which > covers > the cabinet and power supply. > > So if anyone has the general -11/60 manual, or the KD11-K tech manual, > those > would be super useful. The FP11-E tech manual would be nice to have, but > isn't > as important as the others. > > Thanks (I hope!)! > >Noel > I recently picked up a copy of the PDP-11/60 Processor Handbook, not sure if that's useful for your research, but if it is let me know... - Josh
PDP-11/60 manuals needed
Hi, does anyone have any PDP-11/60 manuals? I went to do articles on the -11/60 and its CPU (KD11-K), but there isn't much online. Bitsavers has EK-KD11K-TD-PRE, but it only covers the maintenance features, not the whole CPU; there is a tech manual - KD11K-TM-001 (I have it in fiche, but my fiche reader has a burned out bulb which I have not yet been able to replace, so it doesn't do me much good). There is a user manual for the FP11-E, which has a certain amount of useful details, but it refers to the technical manual, which is not there. And there's EK-11060-SV-01, which covers the cabinet and power supply. So if anyone has the general -11/60 manual, or the KD11-K tech manual, those would be super useful. The FP11-E tech manual would be nice to have, but isn't as important as the others. Thanks (I hope!)! Noel
Re: DECserver 700 PSU fix, H7881-AA
Hi folks, Thanks for the links, I should’ve said I work for a DEC/HPE reseller so I can get replacements through work but I thought there might be some folk here who’ve fixed one before and might have some tips. Cheers again Adrian > On 27 Feb 2019, at 18:06, Electronics Plus via cctalk > wrote: > > https://shop.mitservices.com/product/digital-dec-server-700-psu-h7881-aa/ > in stock in the UK. > > -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Gregory > Beat via cctalk > Sent: Monday, February 25, 2019 12:48 PM > To: binarydinosa...@gmail.com; cctalk@classiccmp.org > Subject: Re: DECserver 700 PSU fix, H7881-AA > > Adrian - > > ASTEC is now owned by Emerson Power (UK address below). > Emerson Power Catalog (find the 57 watt models): > https://www.mouser.com/catalog/supplier/library/pdf/Emersonpower_catalog.pdf > > PowerClinic in Dallas/Fort Worth area > services a large number of Switch-Mode power supplies. > http://portal.powerclinicinc.com/web/services > Power Clinic Inc. > 3732 Arapaho Rd > Addison, TX 75001 > USA > == > H7881-AA (Refurbished), $177.00 USD > https://www.tamayatech.com/parts.php?g=H7881AA > > H7881-AA Power Supply, 57 watt , $450.00 USD > https://www.ipsystemsinc.com/shopping/pgm-more_information.php?id=630 > > ASTEC - Europe (UK) > Waterfront Business Park > Merry Hill, Dudley > West Midlands, DY5 1LX > United Kingdom > Telephone: +44 (0) 1384 842 211 > Facsimile: +44 (0) 1384 843 355 > == > From: Adrian Graham > To: "General Discussion: On-Topic and Off-Topic Posts" > Subject: DECserver 700 PSU fix, H7881-AA > > Hi folks, > > My trusty DECserver has bitten the dust in a silent and non-violent way > with the fuse still intact so has anyone got tips on troubleshooting? I > know it's the PSU because I 'borrowed' another PSU from work and the unit > is running again. It's an ASTEC unit under the hood, and in my experience > of fixing the older types like the AC8151 (Memotech, TRS80 II/III, Osborne > etc) the chief culprits on an utterly dead PSU are the input caps and/or > the small 220uF or 330uF startup cap in the feedback circuit. > > I haven't checked bitsavers etc for a schematic yet, does such a thing > exist? > Hopefully the ASTEC board has a model number on it. > > Cheers > -- > adrian/witchy > Owner of Binary Dinosaurs, the UK's biggest private home computer > collection? > t: @binarydinosaurs > f: facebook.com/binarydinosaurs > w: www.binarydinosaurs.co.uk > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > -- adrian/witchy Owner of Binary Dinosaurs, the UK's biggest private home computer collection? t: @binarydinosaursf: facebook.com/binarydinosaurs w: www.binarydinosaurs.co.uk
RE: DECserver 700 PSU fix, H7881-AA
https://shop.mitservices.com/product/digital-dec-server-700-psu-h7881-aa/ in stock in the UK. -Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Gregory Beat via cctalk Sent: Monday, February 25, 2019 12:48 PM To: binarydinosa...@gmail.com; cctalk@classiccmp.org Subject: Re: DECserver 700 PSU fix, H7881-AA Adrian - ASTEC is now owned by Emerson Power (UK address below). Emerson Power Catalog (find the 57 watt models): https://www.mouser.com/catalog/supplier/library/pdf/Emersonpower_catalog.pdf PowerClinic in Dallas/Fort Worth area services a large number of Switch-Mode power supplies. http://portal.powerclinicinc.com/web/services Power Clinic Inc. 3732 Arapaho Rd Addison, TX 75001 USA == H7881-AA (Refurbished), $177.00 USD https://www.tamayatech.com/parts.php?g=H7881AA H7881-AA Power Supply, 57 watt , $450.00 USD https://www.ipsystemsinc.com/shopping/pgm-more_information.php?id=630 ASTEC - Europe (UK) Waterfront Business Park Merry Hill, Dudley West Midlands, DY5 1LX United Kingdom Telephone: +44 (0) 1384 842 211 Facsimile: +44 (0) 1384 843 355 == From: Adrian Graham To: "General Discussion: On-Topic and Off-Topic Posts" Subject: DECserver 700 PSU fix, H7881-AA Hi folks, My trusty DECserver has bitten the dust in a silent and non-violent way with the fuse still intact so has anyone got tips on troubleshooting? I know it's the PSU because I 'borrowed' another PSU from work and the unit is running again. It's an ASTEC unit under the hood, and in my experience of fixing the older types like the AC8151 (Memotech, TRS80 II/III, Osborne etc) the chief culprits on an utterly dead PSU are the input caps and/or the small 220uF or 330uF startup cap in the feedback circuit. I haven't checked bitsavers etc for a schematic yet, does such a thing exist? Hopefully the ASTEC board has a model number on it. Cheers -- adrian/witchy Owner of Binary Dinosaurs, the UK's biggest private home computer collection? t: @binarydinosaurs f: facebook.com/binarydinosaurs w: www.binarydinosaurs.co.uk --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
Re: Mystery old computer & terminals on eBay UK
Go me :) I've not laid eyes on one of those since I hefted them out of the main computer suite in TnMOC's H-Block back in the noughties so we could clean the room before the arrival of the ICL 2966. I hope they're still around. -- adrian/witchy Owner of Binary Dinosaurs, the UK's biggest private home computer collection? t: @binarydinosaursf: facebook.com/binarydinosaurs w: www.binarydinosaurs.co.uk On Wed, 27 Feb 2019 at 11:41, Liam Proven via cctalk wrote: > On Wed, 27 Feb 2019 at 12:24, Jonathan Katz wrote: > > > > Some google shows BCL=Business Computers Limited (potentially) > > Foolishly I didn't read the comments first. > > It's one of these: > > http://www.ps8computing.co.uk/bcl.html > > -- > Liam Proven - Profile: https://about.me/liamproven > Email: lpro...@cix.co.uk - Google Mail/Hangouts/Plus: lpro...@gmail.com > Twitter/Facebook/Flickr: lproven - Skype/LinkedIn: liamproven > UK: +44 7939-087884 - ČR (+ WhatsApp/Telegram/Signal): +420 702 829 053 >
Re: Mystery old computer & terminals on eBay UK
On Wed, 27 Feb 2019 at 12:24, Jonathan Katz wrote: > > Some google shows BCL=Business Computers Limited (potentially) Foolishly I didn't read the comments first. It's one of these: http://www.ps8computing.co.uk/bcl.html -- Liam Proven - Profile: https://about.me/liamproven Email: lpro...@cix.co.uk - Google Mail/Hangouts/Plus: lpro...@gmail.com Twitter/Facebook/Flickr: lproven - Skype/LinkedIn: liamproven UK: +44 7939-087884 - ČR (+ WhatsApp/Telegram/Signal): +420 702 829 053
Re: Mystery old computer & terminals on eBay UK
I thought that was a variant of the BCL Mollie, aka Molecular 18 but google disagrees with me. TnMOC have 2 of them so I'll ask the volunteers. -- adrian/witchy Owner of Binary Dinosaurs, the UK's biggest private home computer collection? t: @binarydinosaursf: facebook.com/binarydinosaurs w: www.binarydinosaurs.co.uk On Wed, 27 Feb 2019 at 11:13, Liam Proven via cctalk wrote: > I don't recognise this, but I'm no expert. > > https://www.ebay.co.uk/itm/113665872765 > > -- > Liam Proven - Profile: https://about.me/liamproven > Email: lpro...@cix.co.uk - Google Mail/Hangouts/Plus: lpro...@gmail.com > Twitter/Facebook/Flickr: lproven - Skype/LinkedIn: liamproven > UK: +44 7939-087884 - ČR (+ WhatsApp/Telegram/Signal): +420 702 829 053 >
Re: Mystery old computer & terminals on eBay UK
Some google shows BCL=Business Computers Limited (potentially) Or maybe one of these: http://webcache.googleusercontent.com/search?q=cache:mBGDWqY-bzkJ:www.tnmoc.org/special-projects/lost-systems/bcl-molecular-computer+=4=en=clnk=uk On Wed, Feb 27, 2019 at 11:13 AM Liam Proven via cctalk < cctalk@classiccmp.org> wrote: > I don't recognise this, but I'm no expert. > > https://www.ebay.co.uk/itm/113665872765 > > -- > Liam Proven - Profile: https://about.me/liamproven > Email: lpro...@cix.co.uk - Google Mail/Hangouts/Plus: lpro...@gmail.com > Twitter/Facebook/Flickr: lproven - Skype/LinkedIn: liamproven > UK: +44 7939-087884 - ČR (+ WhatsApp/Telegram/Signal): +420 702 829 053 > -- -Jon +44 7792 149029
Re: Mystery old computer & terminals on eBay UK
On Wed, Feb 27, 2019, 6:13 AM Liam Proven via cctalk wrote: > I don't recognise this, but I'm no expert. > > https://www.ebay.co.uk/itm/113665872765 > > -- > Could be a 9 track tape or storage drive/cart storage unit? Or some sort of peripheral? Bill >
Mystery old computer & terminals on eBay UK
I don't recognise this, but I'm no expert. https://www.ebay.co.uk/itm/113665872765 -- Liam Proven - Profile: https://about.me/liamproven Email: lpro...@cix.co.uk - Google Mail/Hangouts/Plus: lpro...@gmail.com Twitter/Facebook/Flickr: lproven - Skype/LinkedIn: liamproven UK: +44 7939-087884 - ČR (+ WhatsApp/Telegram/Signal): +420 702 829 053
Re: HP 85 tapes
Christian, the TAPDUP binary and associated utility programs in BASIC was used to create EPROMs with programs and data for the 9915 Series-80 box. It can be used to read the directory record and then to read tokenized PROGrams as data on a file-record base - not at low record level. The package also contains programs to massage the PROG data into BASIC DATA statements for creating EPROM burner files. You could use it to read the tape directory and individual PROG files but right now I am not aware of a program which would write this data back to a tape. You would open the directory, look up a file and then OPEN IMAGE it. Next you would READ RECORD IMAGE$ the program record by record. In the end you have not gained much compared to the simple COPY statement. Except for the copy of the directory with attributes and security flags. Alternative: There are also READSECTOR binary programs for reading raw 256 byte records/sectors from disks. They also work on the tape ":T" but seem to start their record count after the directory records. On disks, record 0 is the first real sector. So, to get the complete binary content one could use C$=CATALOG$ from TAPDUP to read the directory record READSECTOR N,R$,D from to read the subsequent raw "data" records. Here are my notes on some of the functions in this binary program: The TAPDUP Binary (Notes by M. Hepperle) This binary contains functions to read tapes (HP-85, 9915) at low level. It does not handle disks. The program was part of the "Tape Duplication and EPROM Programming Pack" (09915-10010). As the original software was not available the binary was re-assembled from an assembler source file. This source file was obviously created by disassembling the original binary. It was found at M. Craggs web site: http://www.biblewitness.org/technical/HP_Series-80/HP-85/ASSM . Martin Craggs home-made disassembler produced many unnecessary DRP and ARP statements, which could be cleaned up to improve readbility. Functions in the TAPDUP binary: C$=CATALOG$ Return the directory record of the tape in form of a 512 byte buffer (2 records). C$ must be DIMed to at least 512. OPEN IMAGE F$ Find the file F$ and open it for reading. ERRN=67: file not found T=READTYPE Return the file type of the currently opened image (the file image must be opened by a preceding call to OPEN IMAGE) 34 = PROG N$=READNAME$ Return the file name of the currently opened image (the file image must be opened by a preceding call to OPEN IMAGE) R$=READ RECORD IMAGE$ Read the next record of the currently opened file. The record has a length of 256 bytes. Reading can be continued by another READ RECORD IMAGE$ until ERRN=71 indicates a read behind the end of the file. See lines 440 ff in IMAGE program for a typical reading loop. (the file image must be opened by a preceding call to OPEN IMAGE) ERRN=71: end of file reached. CREATE IMAGE S$,I,J,K 3 numeric parameters WRITE IMAGE R$ Write record to (where?) "Error 244: No file open" WRITE CATALOG C$ Writes the catalogue back to disk. C$ must contain a valid catalog structure, otherwise your tape will be unreadable afterwards. READLOGLEN Read the logical record length, which is 256. Another useful function in the Program Development ROM C$=CHECKSUM$(S$) Return the IBM SDLC CRC checksum of the given string (the length of the checksum is two bytes). Example: dumping the tape catalog Each catalog entry is 12 bytes 10 DIM C$[512] 20 C$=CATALOG$ 30 K=1 40 FOR I=1 TO 504 STEP 12 50 FOR J=1 TO 12 60 PRINT C$[K,K]; 70 K=K+1 80 NEXT J 90 PRINT 100 NEXT I 110 PRINT 120 END Tape documentation lifted from Everett Kaser's Series-80 Emulator (I hope Everett won't sue me for this blatant copyright infringement): TAPE LAYOUT --- The HP-85 tape cartridges contained at most 43 files. File 0 was always the TAPE DIRECTORY, and was always 4 records long. Files 1-42 were the user-created files. The tape itself had 2 TRACKS, 0 and 1. There were TWO COPIES of the TAPE DIRECTORY, one in records 0 and 1 of file 0, and a second in records 2 and 3 of file 0. Record 2 was an exact duplicate of record 0, and record 3 was an exact duplicate of record 1. Only one record of the directory could be read into memory at a time, so the system had to keep track of whether the first 1/2 or the second 1/2 of the directory was in memory (or neither). Each DIRECTORY RECORD consisted of 21 12-byte directory entries, which equals 252 bytes. The final 4 bytes of each record as follows: 252 directory segment flag (0 or 1). 253 FILE# of file that wraps from the end of TRACK 0 to the beginning of TRACK 1. 254 (2 bytes) RECORD# of first record of the split file 255 that's on TRACK 1. Each DIRECTORY ENTRY consists of 12 bytes, allocated thusly: BYTES DESCRIPTION - - 0-5 ASCII FILE NAME, blank filled 6 EXTENDED File Type
Another DEC UNIBUS signal adapter: UniProbe
Hi, most people dealing seriously with older PDP-11s have found means to monitor the UNIBUS traffic. My latest approach is www.retrocmp.com/tools/uniprobe UniProbe is a M9302 terminator, a LED display, a probe for logic analyzer. It can be mounted in Standard or Modified UNIBUS sockets. I'm ordering a batch of PCBs in a few days and will show this and other stuff (UniBone, BlinkenBone) at VCFPNW in Seattle. https://vcfed.org/wp/festivals/vintage-computer-festival-pacific-northwest/ best regards, Joerg
Re: HP 85 tapes
On Tue, 26 Feb 2019, Paul Berger wrote: Well a quick google and I found this http://vintagecomputers.site90.net/hp85/hp9915_eprom.htm it would seem that this was one of the tools used to build images of programs to burn into EPROMs for 9915 which is a version of the 85 designed to be used as an embedded controller. I don't think this is the same program. The TAPDUP I'm looking at has 13 tokens/commands, none of which is mentioned in any of the 9915 docs. Christian
