Re: Looking for a home for most issues of BYTE Magazine

On 12/15/2018 12:54 AM, Randy Dawson via cctalk wrote: Zane, your comments are appreciated. I have paid for subscriptions to ebooks that cost ~10 a month, and they are OK for text, but when a schematic comes up, it sucks (scribd) you cant zoom or increase the resolution. I also follow you on you

Re: Looking for a home for most issues of BYTE Magazine

Kilobaud is also up on the Internet archive. https://archive.org/details/kilobaudmagazine Kilobaud Microcomputing Magazine - Internet Archive Kilobaud Microcomputing was a magazine dedicated to the computer homebrew hobbyists from the end of the 1970s

Core memory emulator using non volatile ram.

I have an idea to produce an MM-8 clone using RAM that acts like core when turned off. Can anybody suggest a chip that will do this? Rod Smallwood Sent from Mail for Windows 10

Latest batch of goodies from Sellam's VWoCW plus 10% off!

Merry Christmas and Happy Hanukkah, folks! And holiday greetings to the rest of us celebrating Festivus! It's time to treat yourself or your favorite nerd for the holidays, so as my gift to you I'm offering 10% off anything with a listing date prior to 2018. Check the "Date Added" column in the

Re: Tektronix X11 terminal

hi im interested if its dual voltage (110 or 240v 50/60hz) unfortunately i live in australia so postage maybe an issue but i have a us address i could ship it to On 15/12/2018 6:14 AM, Carlo Pisani via cctalk wrote: hi I have a xp217 tektronix terminal for sale with its PSU and firmware let

Re: Researching IBM rare equipment from 50s to 80s

I worked with an ex-IBMer who told me about this thing. It was nick-named "The Noodle Snatcher" - with a puff of air it wiggled the mag tape and wrapped it around a drum for read/write. It had a nasty habit of mis-handling the tape. He told me that during a sales presentation to a customer, th

RE: Core memory emulator using non volatile ram.

Perhaps Cypress FM1808 (32Kx8). Obsolete, but available on eBay. SOP for a bit of extra challenge! -Original Message- From: cctech [mailto:cctech-boun...@classiccmp.org] On Behalf Of Rod G8DGR via cctech Sent: Saturday, December 15, 2018 4:22 AM To: General Discussion: On-Topic and Off

Re: Core memory emulator using non volatile ram.

Ramtron had most of the patents on Ferroelectric RAM in the past. Cypress acquired them many years ago. New production FRAM is still sold on Digikey - in 5V SOIC packages. Not cheap though: 8K x 8 - $12.72 (qty 1): https://www.digikey.com/product-detail/en/cypress-semiconductor-corp/FM1

Re: Looking for a home for most issues of BYTE Magazine

these  may already  be scanned and  out there.   we  have   hardcopy  and   what a  joy to  sit  and   just  look  though in  a  big  arm chair   If  you have  space   always  great to have  them in  prit  as  the images  for  displays  etc   are  better     than what usually is  out   c

Re: Core memory emulator using non volatile ram.

Texas Instruments' MSP430 MCUs use FRAM. This one for example: http://www.ti.com/product/msp430fr5969 costs ~$2.30. You could do some emulation in the same package, too. Not sure what your speed requirements are of course! =] -- Anders Nelson +1 (517) 775-6129 www.erogear.com On Sat, Dec 15,

Re: Core memory emulator using non volatile ram.

Another vote for RAMtron/Cypress FeRAM. I've used their FeRAMs in a number of systems, here's a writeup on my "core board" for S-100: http://www.glitchwrks.com/2016/03/29/ferroelectric-ram-part-1 I've got a bunch of FM18W08s in stock if you need one, I can stick it on a DIP adapter if needed. One

Re: Core memory emulator using non volatile ram.

On 12/15/2018 1:22 AM, Rod G8DGR via cctalk wrote: I have an idea to produce an MM-8 clone using RAM that acts like core when turned off. Can anybody suggest a chip that will do this? Rod Smallwood Sent from Mail for Windows 10 I used Everspin MRAM chips for my PDP-8e memory cards. It's ju

RE: Core memory emulator using non volatile ram.

All very interesting.. 1201 alarm while I deal will all of the information Rod Sent from Mail for Windows 10 From: systems_glitch via cctalk Sent: 15 December 2018 16:40 To: Anders Nelson; General Discussion: On-Topic and Off-Topic Posts Subject: Re: Core memory emulator using non volatile ram.

RE: Core memory emulator using non volatile ram.

1201.. 1201 .. Processing large amount of data... Rod Sent from Mail for Windows 10 From: Bob Rosenbloom via cctalk Sent: 15 December 2018 16:45 To: cctalk@classiccmp.org Subject: Re: Core memory emulator using non volatile ram. On 12/15/2018 1:22 AM, Rod G8DGR via cctalk wrote: > I have an id

Re: Tektronix X11 terminal

On 12/14/18 12:14 PM, Carlo Pisani via cctalk wrote: hi Hi, I have a xp217 tektronix terminal for sale with its PSU and firmware Where are you / is it located? let me know if someone wants it I've had a passing interest in an X11 terminal for a while now. -- Grant. . . . unix || die

Re: Core memory emulator using non volatile ram.

On 12/15/2018 03:22 AM, Rod G8DGR via cctalk wrote: I have an idea to produce an MM-8 clone using RAM that acts like core when turned off. Can anybody suggest a chip that will do this? Any CMOS SRAM chips can do this, with a backup battery. I used a IS62WV6416DBLL in a project a while ago.

Re: Core memory emulator using non volatile ram.

FRAM or MRAM. I make extensive use of them in my projects. Everspin has a few (all SMT and 3.3v). As I recall they run ~$20/ea for 4Mb (512K x 8 or 256K x 16). TTFN - Guy > On Dec 15, 2018, at 1:22 AM, Rod G8DGR via cctalk > wrote: > > I have an idea to produce an MM-8 clone using RAM tha

Re: Looking for a home for most issues of BYTE Magazine

> On Dec 14, 2018, at 11:54 PM, Randy Dawson wrote: > > Zane, your comments are appreciated. > > I have paid for subscriptions to ebooks that cost ~10 a month, and they are > OK for text, but when a schematic comes up, it sucks (scribd) you cant zoom > or increase the resolution. > I also foll

Re: Core memory emulator using non volatile ram.

On 12/15/18 10:01 AM, Guy Sotomayor Jr via cctalk wrote: > FRAM or MRAM. I make extensive use of them in my projects. > > Everspin has a few (all SMT and 3.3v). As I recall they run ~$20/ea for 4Mb > (512K x 8 or 256K x 16). As neither MRAM nor FRAM requires a write-after-read refresh, I fail

Re: Core memory emulator using non volatile ram.

Chuck, FRAM is destructive read on the die, from what I understand. It's just that the onboard controller takes care of it for you, much like a core subsystem. Thanks, Jonathan On Sat, Dec 15, 2018 at 1:55 PM Chuck Guzis via cctalk < cctalk@classiccmp.org> wrote: > On 12/15/18 10:01 AM, Guy Sot

Re: Core memory emulator using non volatile ram.

If you want the real deal you can always make a driver out of a bunch of H-bridge ICs and an old core plane. I'll skip suggesting you weave your own core... On Sat, Dec 15, 2018, 2:01 PM systems_glitch via cctalk < cctalk@classiccmp.org wrote: > Chuck, > > FRAM is destructive read on the die, fro

Re: Data Electronics Incorporated (DEI) CMTD-300S2 tape drive manual

I've got a 3M DCD drive that's very similar--fixed multi-track head. I've never seen a practical use for it, however, given the terribleness of old QIC carts. DEI also re-packaged the Exabyte 8mm transports in their own enclosures with their own LCD readouts. I've got one such drive here. --Chu

AW: Core memory emulator using non volatile ram.

Hi Rod, take some microcontroller and some serial flash memory. With best regards Gerhard -Ursprüngliche Nachricht- Von: cctalk [mailto:cctalk-boun...@classiccmp.org] Im Auftrag von cctalk-requ...@classiccmp.org Gesendet: Samstag, 15. Dezember 2018 19:00 An: cctalk@classiccmp.org Betref

Re: Looking for a home for most issues of BYTE Magazine

Thank you all for all of the interest. The first person who wrote me isn't far away at all and will give it a good home, so I'm going to go with him. While I'm fetching those, I'm going to make a list of other older hardware for which I'd like to find homes, so I'll post about that, and possibl

Re: Core memory emulator using non volatile ram.

Serial flash has an endurance between 10K-100K writes per cell so I think that would break down quickly. Wear-leveling on a serial device would be very slow... On Sat, Dec 15, 2018, 3:33 PM Gerhard Kreuzer via cctalk < cctalk@classiccmp.org wrote: > Hi Rod, > > take some microcontroller and some

Re: Core memory emulator using non volatile ram.

On 12/15/2018 02:45 PM, Anders Nelson via cctalk wrote: Serial flash has an endurance between 10K-100K writes per cell so I think that would break down quickly. Wear-leveling on a serial device would be very slow... If you intend to use it as main core memory on an old CPU, it will perform VER

Re: Core memory emulator using non volatile ram.

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

Re: Core memory emulator using non volatile ram.

On Sat, Dec 15, 2018, 1:51 PM Jon Elson via cctalk On 12/15/2018 02:45 PM, Anders Nelson via cctalk wrote: > > Serial flash has an endurance between 10K-100K writes per cell so I think > > that would break down quickly. Wear-leveling on a serial device would be > > very slow... > > > > > If you in

Re: Core memory emulator using non volatile ram.

> On Dec 15, 2018, at 1:18 PM, Warner Losh via cctalk > wrote: > > On Sat, Dec 15, 2018, 1:51 PM Jon Elson via cctalk wrote: > >> On 12/15/2018 02:45 PM, Anders Nelson via cctalk wrote: >>> Serial flash has an endurance between 10K-100K writes per cell so I think >>> that would break down qu

Re: Core memory emulator using non volatile ram.

On Sat, Dec 15, 2018, 2:25 PM Guy Sotomayor Jr > > On Dec 15, 2018, at 1:18 PM, Warner Losh via cctalk < > cctalk@classiccmp.org> wrote: > > > > On Sat, Dec 15, 2018, 1:51 PM Jon Elson via cctalk < > cctalk@classiccmp.org > > wrote: > > > >> On 12/15/2018 02:45 PM, Anders Nelson via cctalk wrote:

Re: Core memory emulator using non volatile ram.

On 12/15/18 1:30 PM, Warner Losh via cctalk wrote: > True. Lessening the pain still doesn't make it right :). MRAM or FRAM does > sound a lot simpler to use... How about nvRAM? Faster, with high capacity. Stores into flash (every CMOS RAM cell is paired with a flash cell) when the supply drops

Christmas came early...

In the form of an estate sale. The first in a long while where I found anything interesting. In addition to buying a large box of 7400 and 4000 series chips, all with 1970's date codes, I got two vintage keyboards: http://wsudbrink.dyndns.org:8080/images/kb_pics/20181215_162104.jpg http://wsu

Re: Christmas came early...

Hi Bill, They are both great looking period keyboards but I do particularly love the George Risk keyboard. It might not be a model 756 but I do have some documentation and hopefully it can help. Check http://vintagecomputer.ca/files/George%20Risk%20Industries/ On Sat, Dec 15, 2018 at 5:34 PM

RE: Christmas came early...

Thanks for the link. I just opened both of them (I didn’t take pictures, maybe later). The GRI is a factory 753. It is spotless inside, wired per spec. I made a 753 work-alike for my IMSAI with the Processor Technology Subsystem B board set: http://q7.neurotica.com/Oldtech/VCF-East2009/I

flashx20 - Floppy and screen for the Epson HX-20

Hi, the Epson HX-20 handheld computer offered an interesting way to connect it with peripheral devices. The serial port at the back of the computer can talk to external hardware using an Epson-specific protocol for data exchange. As this protocol is quite well documented, I wrote a little pro

Re: Core memory emulator using non volatile ram.

On Sat, Dec 15, 2018 at 11:55 AM Chuck Guzis via cctalk < cctalk@classiccmp.org> wrote: > On 12/15/18 10:01 AM, Guy Sotomayor Jr via cctalk wrote: > > FRAM or MRAM. I make extensive use of them in my projects. > > > > Everspin has a few (all SMT and 3.3v). As I recall they run ~$20/ea for > 4Mb

Re: Core memory emulator using non volatile ram.

On Sat, Dec 15, 2018 at 6:15 PM Rod G8DGR via cctalk wrote: > All very interesting.. 1201 alarm while I deal will all of the information > Rod > > 1202 coming up... I don't know specifically about the various memory types being bandied about, but I do know that the destructive read behavior of

Re: flashx20 - Floppy and screen for the Epson HX-20

On Sat, Dec 15, 2018 at 5:47 PM Norbert Kehrer via cctalk wrote: > With that, you get a big screen (the PC monitor) and disk space for > programs and data on the PC's hard disk, which can then also be used for > data and program exchange. This is great - thank you for writing it! I have at leas

Re: flashx20 - Floppy and screen for the Epson HX-20

On Sat, Dec 15, 2018 at 5:47 PM Norbert Kehrer via cctalk wrote: With that, you get a big screen (the PC monitor) and disk space for programs and data on the PC's hard disk, which can then also be used for data and program exchange. On Sun, 16 Dec 2018, Jason T via cctalk wrote: This is great

8-Update

Sheesh!! Well what a response. This stems from my (so far) successful major over haul of my PDP-8/e. I found one failed 7474 and one failed 8881 – replaced and now working. I think I have the rim loader toggled in and will attempt to send a paper tape image from Hyperterm Strangely I do have at