Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?
One last tidbit on the Micropolis floppy drives--the early drives (1014, etc.) used a body/chassis made of steel plate. The later drives (1115) used cast body parts. It's also worth observing that the leadscrew positioner is probably the best, as it's the dominant technology in 135 tpi 3.5" drives. --Chuck
Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?
> > Of course, neither Tandon nor MPI produced a drive that was even close > to Micropolis. But almost nobody was as expensive as Micropolis either. > Micropolis never gave up, IIRC, on its 4-steps-per-cylinder precision > leadscrew setup. > > I've got a Micropolis 1115-VI drive here and it's a heavy wonder to > behold. The whole stepper motor, leadscrew and head assembly pivots on > the drive door--usually, the stepper is attached to the main body of the > drive. > > Further, it's a drive that features a microcontroller for drive spindle > speed control (no adjustments) as well as for providing a "buffered > seek" capability. Fire step pulses at it at rates slower than 6 > msec/step and it behaves normally. Fire pulses at between 3-5 msec and > the drive goes into buffered seek mode. > > It's a wonder to behold and, IIRC, was substantially more expensive than > anyone else's 5.25" floppy drives. Sort of the antithesis of Jugi > Tandon's "make 'em cheap" approach. > > No wonder Micropolis went out of the floppy business. > > --Chuck > Not sure if you have ever compared MPI, Tandon, and Micropolis versions of the Commodore CBM 8050 dual IEEE disk drives. Each had a totally different approach to the same job, the diagnostics used to rest them were totally different. Bill >
Re: Does anyone recognise these boards please
On 2018-Oct-05, at 5:38 PM, Kevin Parker via cctalk wrote: > Be most grateful if anyone can advise here please. Rescued a TRS-80 MC10 from > deceased estate recently - it was headed for the bin > but got saved. > > The original owner was a bit of an electronics hobbyist and his > brother-in-law tossed these boards in with the bundle I grabbed. > > http://koken.advancedimaging.com.au/index.php?/albums/boards/ Regarding the 2nd board: Is there a likelihood this board could trace back to the Vancouver, B.C., Canada region? - there was an "Intek Electronics" near the south end of Main St in Vancouver in that era (70s-80s). I don't know if they had other outlets across the country. It was a component supplier/retailer but like other such retailers it might have been a kit or in-house effort made and sold by them.
Re: Ethernet names...
> On Oct 4, 2018, at 11:00 PM, Eric Smith via cctalk > wrote: > > On Thu, Oct 4, 2018, 14:19 Eric Smith wrote: > >> except that in the Pelkey account the Alto network wasn't designed and >> built until June, _after_ the name change. >> > > I should have written that it the design and construction _started_ in > June. The initial Ethernet wasn't completed until late 1974. Below, my interpretation of Dr. Metcalfe’s talk. Dates were generally backed up by pictures of documents, with dates visible on the covers, so I suspect the timelines given are reasonably accurate. I didn’t hear anything to contradict the timeline Grant was describing. The talk was fun to listen to, lots of dry humor and very good scene-setting and reminders of what the computational environment used to be like. ——— Metcalfe claimed he got his start at serial data transmission "Sending bits 1 at a time down an acoustic delay line memory”. The other parts of that project didn’t deliver, but he learned a lot from that. He went on to connect a PDP-10 to the network at MIT, using similar serial technology. He showed a document dated Oct. 1972, "Scenarios for using the Arpnet” He got a Harvard PhD in 1972 He went to Xerox PARC in 1972 He showed a later photo of a Xerox Parc Alto personal computer, with Ethernet, and stated the intent there was to put that on the desk of all of the engineeris at PARC. He started with 1/2" yellow coax - yellow because that was the color his group decided to order. He says that is the standard color, which standard is almost universally ignored. He showed a diagram, including both the term "ether” - because the medimum could be coax cable - or telephone “ether", or radio “ether” - which presages the 802.11 standards. He showed a photo of an Aloha packet network radio system circa 1970. To the question, why did they not go not straight to wi-fi? He responded that RF technology would support no more than 4kbits at the time, while semiconductors developed in the 1990's allowed transition to radio at hundreds of kbits/s. They wanted at least hundreds of kbits/s, so they went with cable. The first version worked at 2.94 Mbits/s, due to card space restrictions - a 170 ns clock present on the backplane of the Xerox Alto was the determinant, since there was no place to put a clock on the original card (which had to go into the Alto). The bandwidth to his office went up by * 10,000 on installation of his card, vs. the old 300 bps modem it replaced. He founded 3Com corporation in 1980, named for "Computer Communications Compatibility", intending to generate that compatibility via standards. He said he would not start a company name with a number if he had it to do over again. Steve Jobs helped him start the company, invited him to the premier of Toy Story and sent a limo, and introduced him to Regis Mckenna (sic?) who was the marketing guy for 3Com for a few years. 3Com’s first shipping hardware was a transceiver running at 10 Mbits/s, costing $750. PC's at the time were not powerful enough to merit 10 Mbits/s, so 3Com pivoted to supply to Unix workstations, including Sun. By then they were moving to thin-net. He showed a draft Standard "blue book" Sept. 1980. Digital, Intel, Xerox were major participants. Competition from IBM and GM (?) led to 3 competing standards: IEEE 802.3, 802.4, 802.5. He said 3Com shipped token ring devices before IBM did, but had "compatibility” issues in IBM environments due to IBM implementation. In Sept. 1982, 3Com shipped etherlink for IBM PC at $1000/card. He showed a graphic of a 3Com sales tool Circa 1982, showing a plot of the value of the network as being proportional to the number of “connections” which is the square of the number of nodes. This formula was described as "Metcalfe's law" in Forbes magazine in 1995. Part of 3Com’s success was its ability to demonstrate network effectiveness as it would be ~10 years in the future by looking at PARC, which his competitors could not do. He referred to this as a “time machine” in marketing research. —— There was more to the talk, but that’s most of the historically relevant things he said. Hope this is helpful. - Mark
RE: Does anyone recognise these boards please
Sorry old chap – link to boards comes up as forbidden R Sent from Mail for Windows 10 From: Kevin Parker via cctalk Sent: 06 October 2018 01:42 To: cctalk@classiccmp.org Subject: Does anyone recognise these boards please Be most grateful if anyone can advise here please. Rescued a TRS-80 MC10 from deceased estate recently - it was headed for the bin but got saved. The original owner was a bit of an electronics hobbyist and his brother-in-law tossed these boards in with the bundle I grabbed. http://koken.advancedimaging.com.au/index.php?/albums/boards/ Kevin Parker
Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?
On 10/05/2018 05:42 PM, Fred Cisin via cctalk wrote: >> On 10/5/18 4:21 PM, Chuck Guzis via cctalk wrote: >>> I seem to remember that there was a "combo" manual that covered the >>> 51/52, 91/82 and 101/102. Also, there was a 52M, but I never >>> encountered it in the wild. > > On Fri, 5 Oct 2018, Al Kossow via cctalk wrote: >> double sided 48tpi, with some micropolis-unique feature? Again, I don't recall. I do have a couple of 100 tpi MPI 5.25" drives--I'm just not sure about what they're called. Micropolis interface also, IIRC, had a *slightly* different pinout from the standard Shugart SA400. (pause while he checks) Pin 2 - Head load Pin 6 - Ready Pin 34 Drive select 4 Just different enough to make for a little confusion. I do have a Tandon TM-100-4M here with a "96 TPI DSR" sticker under the latch, so the factory probably wasn't too careful about that. Of course, neither Tandon nor MPI produced a drive that was even close to Micropolis. But almost nobody was as expensive as Micropolis either. Micropolis never gave up, IIRC, on its 4-steps-per-cylinder precision leadscrew setup. I've got a Micropolis 1115-VI drive here and it's a heavy wonder to behold. The whole stepper motor, leadscrew and head assembly pivots on the drive door--usually, the stepper is attached to the main body of the drive. Further, it's a drive that features a microcontroller for drive spindle speed control (no adjustments) as well as for providing a "buffered seek" capability. Fire step pulses at it at rates slower than 6 msec/step and it behaves normally. Fire pulses at between 3-5 msec and the drive goes into buffered seek mode. It's a wonder to behold and, IIRC, was substantially more expensive than anyone else's 5.25" floppy drives. Sort of the antithesis of Jugi Tandon's "make 'em cheap" approach. No wonder Micropolis went out of the floppy business. --Chuck
Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?
On 10/5/18 4:21 PM, Chuck Guzis via cctalk wrote:
I seem to remember that there was a "combo" manual that covered the
51/52, 91/82 and 101/102. Also, there was a 52M, but I never
encountered it in the wild.
On Fri, 5 Oct 2018, Al Kossow via cctalk wrote:
double sided 48tpi, with some micropolis-unique feature?
Interesting.
http://www.mfarris.com/floppy/mpi.html
shows 'M', 'S', and "M-S" suffixes.
In OTHER brands, the Tandon TM100-4M was much like the TM100-4, except
with 100TPI, instead of 96TPI. ("M for Micropolis compatible", and some
of the TM100-4M drives did not have an 'M' on the nameplate!)
(For those not familiar, Micropolis made a 100 TPI drive, and a few
companies made provision for that.)
But, what Micropolis features would be desirable in a 48TPI drive?
And what was the difference between a 92M, a 92S, a 92M-002, and a 102M-S
If it were "91"/"92"/"91M"/"92M", then that would seem comparable to the
Tandon TM100-3/TM100-4/TM100-4M.
And what is the 101/102, if not 100tpi versions of the 91/92?
Course, thei all might be irrelevant if the differences were lead-screw
(what my micropolis 48tpi had), V split band positioner, (like my MPI
B51s, which were the only MPIs that I had)
OR difference in OTHER specs such as for faster drives? (Lead screw tends
to be slower than split-band)
Was there ever any brand of drive where the alignment of the second side
head was a DIFFERENT offset than the USUAL offset from the position of the
first side head?
Over the lifespan of 5.25" drives, there have been a few changes in some
signals, such as READY, DiskChange, Density, etc. Even to the point that
Tandy used pin 32 for fourth drive select, and then the drive
manufacturers used it for side select.
Does anyone recognise these boards please
Be most grateful if anyone can advise here please. Rescued a TRS-80 MC10 from deceased estate recently - it was headed for the bin but got saved. The original owner was a bit of an electronics hobbyist and his brother-in-law tossed these boards in with the bundle I grabbed. http://koken.advancedimaging.com.au/index.php?/albums/boards/ Kevin Parker
Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?
On 10/05/2018 05:05 PM, Al Kossow via cctalk wrote: > > > On 10/5/18 4:21 PM, Chuck Guzis via cctalk wrote: > >> I seem to remember that there was a "combo" manual that covered the >> 51/52, 91/82 and 101/102. Also, there was a 52M, but I never >> encountered it in the wild. > > double sided 48tpi, with some micropolis-unique feature? Check my shelves, I think the 52M is Micropolis, but 100 tpi. I'd have to double-check, but it looks that way at first glance. Damn, I'm getting old. I used to remember stuff like this. --Chuck
Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?
On 10/5/2018 4:04 PM, Bill Degnan via cctalk wrote: On Fri, Oct 5, 2018, 6:43 PM Fred Cisin via cctalk wrote: On Fri, 5 Oct 2018, steve shumaker via cctalk wrote: I've scanned something called the "MPI Flexible Disk Drive Interfacing Guide" for the Model 51/52 floppy units Is that the same as: http://www.osiweb.org/manuals/MPI_B51-B52_Product_Manual.pdf ? Q: Is the 91/92 being asked about merely a 96TPI version of the MPI In 1982, this Infoworld article shows MPI in on a standards group for microfloppies. They were not a player with a lot of room to stumble, and I believe they didn't do much with the 91/92 technology because of lack of sales. They were betting on the 3 1/2" market, and will look around to see if I can find info on that. The following google scan barf is for Infoworld, September 13, 1982, page 6. https://books.google.com/books?id=EDAEMBAJ=PA6=PA6=magnetic+peripherals+inc+mpi+chatsworth+ca+-control+-data+-cdc=bl=J9seBGsWD7=7Mvc7_wqSCkt48EydabdDozjbho=en=X=2ahUKEwj55tS9tfDdAhUJrlQKHXs7CxUQ6AEwAXoECAQQAQ#v=onepage=magnetic%20peripherals%20inc%20mpi%20chatsworth%20ca%20-control%20-data%20-cdc=false Lists members of a group to standardize form, as well as that there are those working on a 3" media. The 1982 time frame fits with our maintaining their Microdata system, and worth mentioning we lost them as a customer for that due to their business not going so well. In Jan 1983, they bought for stock a head company https://www.upi.com/Archives/1983/01/24/BUSINESS-BRIEFS/1727412232400/ "Micro Peripherals Inc. said Monday it has acquired in return for MPI stock assets of the floppy disk magnetic recording head operations of Information Magnetics Corp., a subsidiary of Computer & Communications Technology Corp." There isn't much in the trade press other than this I found. thanks Jim thanks Jim
Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?
Nope. not the same. did a page by page comparison, *very* close on most of the specs - but when you get to a J1 pinout diagram for the cable, there are significant differences. The 51/52 uses extra lines that the B51/52 shows as not used. Steve On 10/5/2018 3:43 PM, Fred Cisin via cctalk wrote: On Fri, 5 Oct 2018, steve shumaker via cctalk wrote: I've scanned something called the "MPI Flexible Disk Drive Interfacing Guide" for the Model 51/52 floppy units Is that the same as: http://www.osiweb.org/manuals/MPI_B51-B52_Product_Manual.pdf ? Q: Is the 91/92 being asked about merely a 96TPI version of the MPI B51/B52? The QT Systems ad in Infoworld that Google comes up with as an early hit says 77 track (not 80). It correctly refers to the B51 as "Sgl sided, Sgl/Dbl Den", but refers to the B52 as "Sgl Sided, Dbl Den", rather than double sided single/double density. So, although 77 V 80 tracks is a definite possibility in those days, the reliability of the specs in that ad are questionable. The B51 was the first non-SHugart 5.25" drive that I ever had. substituting it for the SA400 was truly trivial. Motor speed seemed to wander a bit, but the track alignment held more stably than the SA400. -- Grumpy Ol' Fred ci...@xenosoft.com
Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?
On 10/5/18 4:21 PM, Chuck Guzis via cctalk wrote: > I seem to remember that there was a "combo" manual that covered the > 51/52, 91/82 and 101/102. Also, there was a 52M, but I never > encountered it in the wild. double sided 48tpi, with some micropolis-unique feature?
Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?
On Fri, 5 Oct 2018, Bill Degnan wrote: The 91/92 is pretty rare compared to the 51/52. I bet one could glean *most* of what one would need from the 51/52 manual, but not all. Could be totally different too. The guy who contacted me I think wants to make his 91 "into" a 51. But wow the 91/92 manual is not already scanned, surprised. Converting a 91/92 into a 51/52 would require a different HEAD, as well as changing the stepper. Stepping could be dealt with in software, to double step, but the narrower head means that it would not do an acceptable job of RE-writing tracks that had been previously written by a "normal" 48tpi drive, and that would ever need to be READ later by a "normal" 48tpi drive. Unless there is some DESPERATE need for the push button door latch, cosmetic match, or something, it would make more sense to find a 48tpi drive. OTOH, it is likely (NOT A CERTAINTY) that the 91/92 is similar enough that parts other than head or stepper from 91/92 could be used to repair a broken 51/52. -- Grumpy Ol' Fred ci...@xenosoft.com
Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?
On 10/05/2018 04:04 PM, Bill Degnan via cctalk wrote: > The 91/92 is pretty rare compared to the 51/52. I bet one could glean > *most* of what one would need from the 51/52 manual, but not all. Could be > totally different too. The guy who contacted me I think wants to make his > 91 "into" a 51. But wow the 91/92 manual is not already scanned, > surprised. I seem to remember that there was a "combo" manual that covered the 51/52, 91/82 and 101/102. Also, there was a 52M, but I never encountered it in the wild. --Chuck
Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?
On 10/5/2018 3:43 PM, Fred Cisin via cctalk wrote: On Fri, 5 Oct 2018, steve shumaker via cctalk wrote: I've scanned something called the "MPI Flexible Disk Drive Interfacing Guide" for the Model 51/52 floppy units Is that the same as: http://www.osiweb.org/manuals/MPI_B51-B52_Product_Manual.pdf ? I have the MPI version of this manual. There is also a schematic for the board I grabbed somewhere. Q: Is the 91/92 being asked about merely a 96TPI version of the MPI B51/B52? I believe it is. The QT Systems ad in Infoworld that Google comes up with as an early hit says 77 track (not 80). It correctly refers to the B51 as "Sgl sided, Sgl/Dbl Den", but refers to the B52 as "Sgl Sided, Dbl Den", rather than double sided single/double density. So, although 77 V 80 tracks is a definite possibility in those days, the reliability of the specs in that ad are questionable. The B51 was the first non-SHugart 5.25" drive that I ever had. substituting it for the SA400 was truly trivial. Motor speed seemed to wander a bit, but the track alignment held more stably than the SA400. -- Grumpy Ol' Fred ci...@xenosoft.com
Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?
On Fri, Oct 5, 2018, 6:43 PM Fred Cisin via cctalk wrote: > On Fri, 5 Oct 2018, steve shumaker via cctalk wrote: > > I've scanned something called the "MPI Flexible Disk Drive Interfacing > Guide" > > for the Model 51/52 floppy units > > Is that the same as: > http://www.osiweb.org/manuals/MPI_B51-B52_Product_Manual.pdf > ? > > Q: Is the 91/92 being asked about merely a 96TPI version of the MPI > > > -- > Grumpy Ol' Fred ci...@xenosoft.com The 91/92 is pretty rare compared to the 51/52. I bet one could glean *most* of what one would need from the 51/52 manual, but not all. Could be totally different too. The guy who contacted me I think wants to make his 91 "into" a 51. But wow the 91/92 manual is not already scanned, surprised. B > >
Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?
On Fri, 5 Oct 2018, steve shumaker via cctalk wrote: I've scanned something called the "MPI Flexible Disk Drive Interfacing Guide" for the Model 51/52 floppy units Is that the same as: http://www.osiweb.org/manuals/MPI_B51-B52_Product_Manual.pdf ? Q: Is the 91/92 being asked about merely a 96TPI version of the MPI B51/B52? The QT Systems ad in Infoworld that Google comes up with as an early hit says 77 track (not 80). It correctly refers to the B51 as "Sgl sided, Sgl/Dbl Den", but refers to the B52 as "Sgl Sided, Dbl Den", rather than double sided single/double density. So, although 77 V 80 tracks is a definite possibility in those days, the reliability of the specs in that ad are questionable. The B51 was the first non-SHugart 5.25" drive that I ever had. substituting it for the SA400 was truly trivial. Motor speed seemed to wander a bit, but the track alignment held more stably than the SA400. -- Grumpy Ol' Fred ci...@xenosoft.com
Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?
On 10/5/2018 9:43 AM, Bill Degnan via cctalk wrote: On Fri, Oct 5, 2018 at 12:42 PM Bill Degnan wrote: Al, so you're saying, "yes please scan the MPI 91/21 product manual"? MPI 91/92 I meant. I've scanned something called the "MPI Flexible Disk Drive Interfacing Guide" for the Model 51/52 floppy units steve
Re: Ethernet names...
> On Oct 4, 2018, at 11:00 PM, Eric Smith via cctalk > wrote: > > On Thu, Oct 4, 2018, 14:19 Eric Smith wrote: > >> except that in the Pelkey account the Alto network wasn't designed and >> built until June, _after_ the name change. >> > > I should have written that it the design and construction _started_ in > June. The initial Ethernet wasn't completed until late 1974. > > CAUTION: This email originated from outside SwRI and it may contain > attachments and/or links. Do not open attachments or click on links unless > you recognize the sender and know the content is safe. Good talk. I’ll summarize my notes and post tonight. Apologies for top-posting earlier, I was in a hurry. - Mark
Re: Ethernet names...
Listening to Bob Metcalfe talk right now (15:30 CST), and there may be a question and answer session. Any questions? - Mark 210-522-6025 office 210-379-4635cell > On Oct 4, 2018, at 11:00 PM, Eric Smith via cctalk > wrote: > > On Thu, Oct 4, 2018, 14:19 Eric Smith wrote: > >> except that in the Pelkey account the Alto network wasn't designed and >> built until June, _after_ the name change. >> > > I should have written that it the design and construction _started_ in > June. The initial Ethernet wasn't completed until late 1974. > > CAUTION: This email originated from outside SwRI and it may contain > attachments and/or links. Do not open attachments or click on links unless > you recognize the sender and know the content is safe.
Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?
On Fri, Oct 5, 2018 at 12:42 PM Bill Degnan wrote: > Al, so you're saying, "yes please scan the MPI 91/21 product manual"? > MPI 91/92 I meant.
Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?
Al, so you're saying, "yes please scan the MPI 91/21 product manual"? On Fri, Oct 5, 2018 at 12:17 PM Al Kossow via cctalk wrote: > I did a scan of the CHM catalog, and we don't appear to have it > We do have some other things, which I'll scan today > > On 10/5/18 6:36 AM, Bill Degnan via cctalk wrote: > > > So there are no scans of this drive otherwise going once going > twice... > > > > b > > > >
Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?
I did a scan of the CHM catalog, and we don't appear to have it We do have some other things, which I'll scan today On 10/5/18 6:36 AM, Bill Degnan via cctalk wrote: > So there are no scans of this drive otherwise going once going twice... > > b >
Re: Digico computer
[...] "Is it red?" [...] LOL I love it! Some beautiful hardware on the list this week, I wish I snagged that DG MicroNova... =] -- Anders Nelson +1 (517) 775-6129 www.erogear.com On Fri, Oct 5, 2018 at 10:07 AM Rod G8DGR via cctalk wrote: > http://www.vintage-icl-computers.com/icl49c > > Drawings for 16V here > > > Sent from Mail for Windows 10 > > From: Christian Corti via cctalk > Sent: 05 October 2018 12:42 > To: cctalk@classiccmp.org > Subject: Digico computer > > We recently got a Digico Micro 16V computer including a Pertec 3342 disk > drive. It is a 16 bit minicomputer based on 74181 ALUs and a couple of 4k > core memory modules. > Since the condition of the system is not the best (dirt, dust, some > bent wirewrap pins), I'm looking for the usual information :-)) > - technical manual, schematics > - software > I'm thankful for any information. > > Christian > >
RE: Digico computer
http://www.vintage-icl-computers.com/icl49c Drawings for 16V here Sent from Mail for Windows 10 From: Christian Corti via cctalk Sent: 05 October 2018 12:42 To: cctalk@classiccmp.org Subject: Digico computer We recently got a Digico Micro 16V computer including a Pertec 3342 disk drive. It is a 16 bit minicomputer based on 74181 ALUs and a couple of 4k core memory modules. Since the condition of the system is not the best (dirt, dust, some bent wirewrap pins), I'm looking for the usual information :-)) - technical manual, schematics - software I'm thankful for any information. Christian
RE: Digico computer
Hi I worked with DIGICO’s in 1974. Is it red? Does it have a manual pull through paper tape reader? Was it made in the UK? I am most interested Rod Smallwood Sent from Mail for Windows 10 From: Christian Corti via cctalk Sent: 05 October 2018 12:42 To: cctalk@classiccmp.org Subject: Digico computer We recently got a Digico Micro 16V computer including a Pertec 3342 disk drive. It is a 16 bit minicomputer based on 74181 ALUs and a couple of 4k core memory modules. Since the condition of the system is not the best (dirt, dust, some bent wirewrap pins), I'm looking for the usual information :-)) - technical manual, schematics - software I'm thankful for any information. Christian
Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?
> > On 10/4/2018 8:34 PM, Bill Degnan via cctalk wrote: > > I got a request for a scan of the Micro Peripherals Inc MPI 91/92 Product > > Manual. I have the manual, I will scan it and post if no one has a copy. > > But I don't want to go through the effort if it exists somewhere already. > > I noticed on bitsavers there was no MPI nor Micro Peripherals Inc section > > so it very well may be that there is no copy of this manual out there.. > > > > Thanks in advance. > > > > Bill > > Is this the floppy drive outfit in Chatsworth or there bouts? > Yes, Chatsworth, CA USA > > I'd love to have the manual, as I think I've got some of the drives it > that is what these are. > > Another vote for yes, make a scan. So there are no scans of this drive otherwise going once going twice... b
Digico computer
We recently got a Digico Micro 16V computer including a Pertec 3342 disk drive. It is a 16 bit minicomputer based on 74181 ALUs and a couple of 4k core memory modules. Since the condition of the system is not the best (dirt, dust, some bent wirewrap pins), I'm looking for the usual information :-)) - technical manual, schematics - software I'm thankful for any information. Christian
