Re: Tape reading question

On 3/11/19 5:51 PM, Dennis Boone via cctalk wrote: > > I just double-checked and the drive pinouts match the DEI CMTD-3400 manual > > I know, it isn't obvious at all from the maint manual.. > > Was this thing referred to as a "Funnel"? Maybe that was a Prime > specific name though. > My

Re: Thinking about PDP11 PC05 Emulation

On 3/11/2019 4:37 PM, allison via cctech wrote: > 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

Parts source

This may or may not be new or useful to anyone here, but I came across this website by accident today. They have a considerable selection of rather hard to find parts for old home computers, game consoles, and even arcade machines. Figured I would send along the link.

Re: Parts source

On 3/11/2019 8:26 PM, Will Cooke via cctech wrote: This may or may not be new or useful to anyone here, but I came across this website by accident today. They have a considerable selection of rather hard to find parts for old home computers, game consoles, and even arcade machines. Figured

Re: Tape reading question

On 3/11/19 5:51 PM, Dennis Boone via cctalk wrote: > > I just double-checked and the drive pinouts match the DEI CMTD-3400 manual > > I know, it isn't obvious at all from the maint manual.. > > Was this thing referred to as a "Funnel"? Maybe that was a Prime > specific name though. No, that

Re: Thinking about PDP11 PC05 Emulation

On 3/11/2019 5:15 PM, Brent Hilpert via cctalk wrote: > On 2019-Mar-11, at 2:37 PM, allison via cctech wrote: >> 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

Re: Tape reading question

A few years back AJ Palmgren helped me recover data from a S8000 tape using his hacked QIC drive. He fed the data coming off the drive into a Saleae logic analyzer. I took the gigantic dumps and wrote a software decoder. The data on the tape are MFM encoded. It went pretty well and I could

Re: Pioneers of computing

Talking of calculators, my first full time job was selling HP calculators and Apple computers which was appropriate, but not necessary for my second full time job as a calculator. Yes my job title was calculator, where I did actuarial calculations on insurance products for variations. So I went

Re: Pioneers of computing

On 2019-Mar-10, at 5:16 PM, Al Kossow via cctalk wrote: > On 3/10/19 2:18 PM, Murray McCullough via cctalk wrote: >> Historians, though not all, credit this development as the >> beginning of the electronic-computing revolution that was truly underway by >> the mid-70s. > > Scotty, more power to

Re: Pioneers of computing

On 2019-Mar-10, at 3:59 PM, Will Cooke via cctalk wrote: >> On 3/10/2019 3:18 PM, Murray McCullough via cctalk wrote: >>> Back in 1965 Jack Kilby, Jerry Merryman and James Van Tassel at texas >>> Instruments created an integrated circuit designed to replace the >>> calulator. Historians, though

Re: Pioneers of computing

On 3/10/2019 9:11 PM, Will Cooke via cctalk wrote: I have seen some claims that this was the first microprocessor -- although not a single chip https://en.wikipedia.org/wiki/Central_Air_Data_Computer Will I would say it was JUST too early to count as valid microprocessor. I expect they all

Re: Pioneers of computing

On Mon, Mar 11, 2019, 4:50 AM Brent Hilpert via cctalk < cctalk@classiccmp.org> wrote: > On 2019-Mar-10, at 5:16 PM, Al Kossow via cctalk wrote: > > On 3/10/19 2:18 PM, Murray McCullough via cctalk wrote: > >> Historians, though not all, credit this development as the > >> beginning of the

Re: Pioneers of computing

> From: Brent Hilpert >>> Back in 1965 Jack Kilby, Jerry Merryman and James Van Tassel at texas >>> Instruments created an integrated circuit designed to replace the >>> calulator. Historians, though not all, credit this development as the >>> beginning of the

Re: Pioneers of computing

On 03/11/2019 02:35 AM, ben via cctalk wrote: IBM 360 32 bits 16 word reg file - 16 bit word. While some 360 models had a hardware architecture of 8, 16, or even 64 bits, all of the 360s (except the model 20, which was not really a 360) had 16 32-bit registers as the program saw it. Jon

Re: Pioneers of computing

Calculators are clearly a step in the progression. Also, clearly not the beginning. To pick any one even and say that was the beginning is absurd. There are to many steps involved. The need to do mathematical calculations was clearly a driving force but that goes back before Babbage. Dwight

Re: Pioneers of computing

On 03/11/2019 04:49 AM, Brent Hilpert via cctalk wrote: > On 2019-Mar-10, at 3:59 PM, Will Cooke via cctalk wrote: >>> On 3/10/2019 3:18 PM, Murray McCullough via cctalk wrote: Back in 1965 Jack Kilby, Jerry Merryman and James Van Tassel at texas Instruments created an integrated circuit

Re: Tape reading question

On 3/11/19 10:32 AM, Al Kossow via cctalk wrote: > If you open it up, it should have a DEI tape drive in it, which predates QIC > The data coming off the tape is NRZ instead of GCR > > I just double-checked and the drive pinouts match the DEI CMTD-3400 manual > I know, it isn't obvious at all

Re: Old Macs available

On 2019-03-11 18:49, Paul Koning wrote: 15 pin connector combined with BNC connector suggests it might be an Ethernet card -- original 10 Mb/s. Which was pretty much my thought looking at it without opening up the system and looking at the card itself. David Williams www.trailingedge.com

Re: Tape reading question

> I just double-checked and the drive pinouts match the DEI CMTD-3400 manual > I know, it isn't obvious at all from the maint manual.. Was this thing referred to as a "Funnel"? Maybe that was a Prime specific name though. De

Re: Tape reading question

On 3/11/19 5:19 PM, Chuck Guzis via cctalk wrote: > I've got a 3M DCD-3 4-track drive if you're interested. I have some Kennedy drives that should work, just have to find the time to get to it. I'm trying to clear some 1/2" tapes off the shelves this week.

Re: Tape reading question

On 3/11/19 5:51 PM, Dennis Boone via cctalk wrote: > > I just double-checked and the drive pinouts match the DEI CMTD-3400 manual > > I know, it isn't obvious at all from the maint manual.. > > Was this thing referred to as a "Funnel"? sounds familiar. several companies made 6400 bpi

RE: Pioneers of computing

>Date: Sun, 10 Mar 2019 17:18:26 -0400 >From: Murray McCullough >Back in 1965 Jack Kilby, Jerry Merryman and James Van Tassel at texas >Instruments Merryman died on February 27. >From the New York Times (March 7, 2019): Jerry Merryman, Co-Inventor of the Pocket Calculator, Dies at 86

Re: Tape reading question

On 3/10/19 7:48 PM, Patrick Finnegan via cctalk wrote: > One has the TurboDOS backup/install media for a Televideo TS-816 that I got > from Don Maslin back in the day. I think the other one is related too, but > it was unmarked. > TS-816 tapes aren't QIC

Re: Pioneers of computing

> On Mar 11, 2019, at 1:13 PM, Robert Feldman via cctalk > wrote: > >> Date: Sun, 10 Mar 2019 17:18:26 -0400 >> From: Murray McCullough > > >> Back in 1965 Jack Kilby, Jerry Merryman and James Van Tassel at texas >> Instruments > > Merryman died on February 27. > > From the New York

Re: Tape reading question

If you open it up, it should have a DEI tape drive in it, which predates QIC The data coming off the tape is NRZ instead of GCR I just double-checked and the drive pinouts match the DEI CMTD-3400 manual I know, it isn't obvious at all from the maint manual.. This is a problem for a bunch of

Re: Tape reading question

Really? They're DC300 cartridges. On Mon, Mar 11, 2019 at 1:16 PM Al Kossow via cctalk wrote: > > > On 3/10/19 7:48 PM, Patrick Finnegan via cctalk wrote: > > > One has the TurboDOS backup/install media for a Televideo TS-816 that I > got > > from Don Maslin back in the day. I think the other

Re: Tape reading question

On 3/11/19 3:45 PM, Chuck Guzis via cctalk wrote: > I use 4mm ID silicone vacuum hose. Works well and requires no > adhesive--just stretch it over the bare hub. e.g. Something like ebay item 132808966973 I use the red stuff, but it comes in a variety of colors. I re-did the PVC vacuum hoses

Re: Old Macs available

> On Mar 11, 2019, at 3:20 PM, nospam212-cctalk--- via cctalk > wrote: > > ... > 1) Macintosh SE/30 - Appears to have some expansion card of some sort inside > with with a 15 pin connector and what I think was a BNC connector? 15 pin connector combined with BNC connector suggests it might

Old Macs available

I am clearing out a storage space and will be offering up some of the old systems and miscellaneous peripherals currently stored there as I clear and sort things.  To start with I have the following available. If anyone is interested or knows where else to offer the various items contact me off

Re: Thinking about PDP11 PC05 Emulation

snip snip snip > > (I could do it with a PIC - did that for a Documation card reader to PC > interface, but I am really tired of fighting Microchip's IDE.) > > BUT - it also occurs to me someone may have already done something like > this? Any leads / ideas? > > JRJ > Yes, see

Thinking about PDP11 PC05 Emulation

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 machine as needed. Moving a PC05 around would be a lot more

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: Thinking about PDP11 PC05 Emulation

Hi, Henk. Cool - so sort of the complement of what I am considering doing - your interface allows connection of a real device to a simulated hardware processor. Your thorough documentation will be helpful in confirming the signals I plan to use. JRJ On 3/11/2019 1:39 PM, Henk Gooijen wrote: >

RE: Thinking about PDP11 PC05 Emulation

Hi Jay, Have a look at www.pdp-11.nl/peripherals/tape/pc05-simh-pc.html If you are interested I can tell you more … I can read and punch tape. PC05 + interface (PIC 18F4550) connects using RX/TX to USB to PC. Reading one character at

Re: Tape reading question

Ah, interesting. I've got a drives, but bad rollers (and one burned out EOT lamp to replace, which is annoying but should be easy enough). Any suggestions on sizes for the rollers? I have one that is starting to go, and the other one is goo already. I can probably guess at sizes but I thought I

Re: Thinking about PDP11 PC05 Emulation

> BUT - it also occurs to me someone may have already done something like > this? Any leads / ideas? Get an old BlackBox ABCD switch that can handle true 25 pin serial ports? It seems like every year at VCFMW there are a few in the free pile. -- Will

Re: Thinking about PDP11 PC05 Emulation

On 3/11/2019 1:17 PM, William Donzelli wrote: >> BUT - it also occurs to me someone may have already done something like >> this? Any leads / ideas? > > Get an old BlackBox ABCD switch that can handle true 25 pin serial ports? > > It seems like every year at VCFMW there are a few in the free

Re: Thinking about PDP11 PC05 Emulation

On 2019-Mar-11, at 2:37 PM, allison via cctech wrote: > 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

Re: Tape reading question

On 3/11/19 10:49 AM, Patrick Finnegan via cctalk wrote: > Ah, interesting. > > I've got a drives, but bad rollers (and one burned out EOT lamp to replace, > which is annoying but should be easy enough). > > Any suggestions on sizes for the rollers? I have one that is starting to > go, and the

Re: Thinking about PDP11 PC05 Emulation

On 2019-Mar-11, at 2:37 PM, allison via cctech wrote: > 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