test-drb March 2007

test-drb@ccmp.vtda.org

239 participants
488 discussions

2708 EPROM progreammer - old magazines designs

by swtpc6800＠comcast.net

> I am thinking of building a programmer for the 2708 EPROM, that can also > read an EPROM and dump it to a serial port. > Here are the schematics and software for a MC6800 based design from 1977. http://www.swtpc.com/mholley/MicroWorks/B09_Index.htm Michael Holley

17 years, 8 months

BA23 setup and DZQ11 configuration

by dbetz＠xlisper.com

I'm starting to collect some qbus equipment again and am trying to setup a system around a KDJ11-AA CPU. My current configuration is: BA23 enclosure KDJ11-AA (m8192) MSV11-QC (m7551 cf) DZQ11-M (m3106) RQDX3 (m7555) TQK50-AA (m7546) First, will it be possible to boot this configuration? Can I setup to start the KDJ11 in ODT mode and enter a bootstrap for the RQDX3 by hand? How long a program would I have to enter? Also, I've done a Google search but have been unable to find documentation on how to configure the DZQ11 module. I'd like to configure it so that I can use one of its ports as the console port for ODT. Is that possible? I'm planning on using a Maxtor XT-2190 190mb hard drive. If that won't work, I have a number of RD53 drives I can use instead. Is this a workable configuration or do I need a boot module like the MXV11? Thanks, David

17 years, 8 months

BA23 setup and DZQ11 configuration

by ajp166＠bellatlantic.net

> >Subject: Re: BA23 setup and DZQ11 configuration > From: David Betz <dbetz at xlisper.com> > Date: Tue, 27 Mar 2007 08:40:03 -0400 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > >> >>> I'm starting to collect some qbus equipment again and am trying >>> to setup a system around a KDJ11-AA CPU. >>> My current configuration is: >>> BA23 enclosure >>> KDJ11-AA (m8192) >>> MSV11-QC (m7551 cf) >>> DZQ11-M (m3106) >>> RQDX3 (m7555) >>> TQK50-AA (m7546) >>> First, will it be possible to boot this configuration? Can I setup >>> to start the KDJ11 in ODT mode and enter a bootstrap for the >>> RQDX3 by hand? How long a program would I have to enter? >> > >Jerome, > >Thanks for your detailed response. In fact, I'd like to thank >everyone on cctalk for the great advice I've received. Based on all >of your input, I've arranged the following change to my PDP-11 >configuration: > >BA23 enclosure >KDJ11-B CPU (includes console port and boot rom) (m8190) (thanks Dave!) >MSV11-QC 4mb memory (m7551 cf) >Sigma RQD11-EC ESDI controller >RQDX3 for RX50 (m7555) >TQK50-AA for TK50 (m7546 >DLV11-J (for extra serial ports) (thanks Julian!) >Possibly a Viking SCSI controller (for CD-ROM and maybe a hard drive) > >I have at least one working ESDI hard drive so that will be my boot >device. My real problem is removable media. Even though I have an >RQDX3 to control an RX50 drive, I don't have a working RX50 drive. >Same goes for the TK50. I have non-working versions of both drives >but nothing I can use to move software onto my system. Anyone have a >working RX50 and/or TK50 drive they can spare? A good substitute for RX50 is an RX33 (aka TEAC FD55GFR) or an FD55F setup as non1.2mb. RX50 drives are actually two platters but one head positioner and they are 96TPI like the mentioned FD55F or G. These work fine with RQDX2/3 as a RX50 substitute. I have one configured that way. Allison

17 years, 8 months

2708 EPROM progreammer - old magazines designs

by john_a_s2004＠hotmail.com

Hi, I am thinking of building a programmer for the 2708 EPROM, that can also read an EPROM and dump it to a serial port. As 2708s are obsolete few moern programmers support them, apart from a few that cost many $100s. So I thought why not try and build one? I've found references to the following classic magazines, and I would be willing to pay a small fee for photocopies or scans of the articles: Program your next EROM in BASIC. Schematic for a 2708 erasable read only memory reader and programmer which uses parallel IO ports to set data and address. The software to drive the programmer is written in BASIC. Byte - March 1978 page 84 on (main article) Byte - April 1978 page 62 (Byte Bugs) How to program 2708 EPROM's using this circuit board and program. Byte - April 1980 page 198 on (main article) Byte - September 1980 page 321 (follow-on) A Simple 2708 EPROM Programmer ... For the Motorola D2 kit ... Frank W. Summers. Kilobaud - February 1980, page 138 (magazine is currently on eBay) #638 2708 EPROM programmer. Electronics Today International (ETI) - July 1978 Instead of money I can provide (or copy / scan articles) any of 24 issues of Byte from 1981 to 1997 (including 11 issues from 1986) which I don't want to keep. or I can photocopy / scan articles from nearly any copy of Practical Computing from 1978 to 1985 (which I do want to keep). If you have built your own design of 2708 programmer and want to share that would be great too. Thanks, John _________________________________________________________________ Match.com - Click Here To Find Singles In Your Area Today! http://msnuk.match.com/

17 years, 8 months

cctalk Digest, Vol 43, Issue 85

by doug＠stillhq.com

Subject: Re: 2708 EPROM progreammer - old magazines designs To: cctech at classiccmp.org Message-ID: <20070327233303.GA39659 at silme.pair.com> Content-Type: text/plain; charset=us-ascii John S wrote: > > As 2708s are obsolete few moern programmers support them, apart from a few > > that cost many $100s. So I thought why not try and build one? I've found > > references to the following classic magazines, and I would be willing to pay > > a small fee for photocopies or scans of the articles: > > > > Program your next EROM in BASIC. Schematic for a 2708 erasable read only > > memory reader and programmer which uses parallel IO ports to set data and > > address. The software to drive the programmer is written in BASIC. > > Byte - March 1978 page 84 on (main article) > > Byte - April 1978 page 62 (Byte Bugs) > I have a programmer designed by Steve Ciarcia from BYTE - It uses an 8051AH-Basic (The 8051 with basic embedded) as the controller - and still works a treat - to this day. - Standalone board, interface via serial. It was fun to see peoples faces when you shipped a ^C down the serial line, and dropped through to a READY prompt. I can find the doco for yo, but it is a high end solution to a simple problem. Alternately, I'm more than happy to read an eprom for you, and email contents - I'm in Oz though. Perhaps there is somebody in the US who could do the same. Doug

17 years, 8 months

Nicolet NICE Z80 Hardware emulator

by doug＠stillhq.com

Hi Guys n Gals, Just a quick second request, Does anybody have a manual - or even a quick reference sheet - for the Nicolet NICE Z80 Hardware pod released in about 1980-1981. I just received one, and there was no manual. I've figured out some of the commands, as there are only 26 letters in the alphabet, but a photocopy or scan of the book, or a quick summary from somebody else, would be invaluable. Take care, Doug

17 years, 8 months

AlphaStation 200/250 and 255 - ebay observations

by ddsnyder＠zoominternet.net

AlphaStation 500's are less expensive, but be aware the memory is unusual. Form factor 168pin dimm, 5v, FPM. The machine has two banks, each requires 4 dimms per bank. I have not been able to find any of these dimms. The AS500/400 I currently have, has both banks filled with 8x64M dimms (512M), the way it was configured when I received it. Dan @ Butler, PA

17 years, 8 months

Vintage Computer footage in "The Trap"

by roger.holmes＠microspot.co.uk

> Message: 25 > Date: Tue, 27 Mar 2007 22:49:28 -0700 > From: "Chuck Guzis" <cclist at sydex.com> > > How many different systems has any of the UK contingent been able to > identify on the BBC 2 Adam Curtis series "The Trap"? He certainly > seems to like his tape drives! Though I did not see it myself, I've been told there was a shot of the one inch version of the ICT 1300 series magnetic tapes about 25 minutes into the first episode. They were Ampex decks, either TM1 or TM2, I can't remember which. The chap who told me has it on VHS which I am going to digitise after I see him in July. Roger.

17 years, 8 months

Speed of text editors on 808x platform

by trixter＠oldskool.org

I spent the weekend obsessing over what the fastest editor I could find for a 4.77MHz 8088, DOS, CGA platform. The results, if anyone is interested, are here: http://www.oldskool.org/guides/texteditors No doubt I will get some scorn for knocking Brief and other venerable editors, but the truth is I have very specific needs: 1. Instant screen response to user input, and 2. a functional undo. That's it, really, and I was surprised how many text editors did not fit the bill. -- Jim Leonard (trixter at oldskool.org) http://www.oldskool.org/ Help our electronic games project: http://www.mobygames.com/ Or check out some trippy MindCandy at http://www.mindcandydvd.com/ A child borne of the home computer wars: http://trixter.wordpress.com/

17 years, 8 months

2708 EPROM progreammer - old magazines designs

by john_a_s2004＠hotmail.com

John_a_s at hotmail.com wrote >I've found references to the following classic magazines, and I would be >willing to pay a small fee >for photocopies or scans of the articles: Program your next EROM in BASIC. Schematic for a 2708 erasable read only memory reader and programmer which uses parallel IO ports to set data and address. The software to drive the programmer is written in BASIC. Byte - March 1978 page 84 on (main article) Byte - April 1978 page 62 (Byte Bugs) How to program 2708 EPROM's using this circuit board and program. Byte - April 1980 page 198 on (main article) Byte - September 1980 page 321 (follow-on) A Simple 2708 EPROM Programmer ... For the Motorola D2 kit ... Frank W. Summers. Kilobaud - February 1980, page 138 (magazine is currently on eBay) #638 2708 EPROM programmer. Electronics Today International (ETI) - July 1978 >Instead of money I can provide (or copy / scan articles) any of 24 issues >of Byte from 1981 to >1997 (including 11 issues from 1986) Apoloiges I should have written 'as well as sending money I can also provide copies / scans etc.' Steve Robertson (steerex at mindspring.com) wrote: >I recently bought a "Willem" programmer off Ebay Thanks, I've borrowed one of these in the past, and it worked fine with single voltage EPROMs (like 2764s) but most 2708s require 3 rails including -5V and -12V. Also the Willem has a limited programming voltage (unless you add an external PSU). Adam Goldman (adamg at pobox.com) wrote: >be aware that the Ciarcia's Circuit Cellar articles in Byte were also >published in book form OK, thanks for that. I've just found on comp.os.cpm that Steve's articles are also in his book 'Build your own Z80 computer'. I don't think these books will be in our local library, they tend to clear old old books to make way for new ones. I would welcome offers from anyone with the book versions also. Regards, John _________________________________________________________________ Get Hotmail, News, Sport and Entertainment from MSN on your mobile. http://www.msn.txt4content.com/

17 years, 8 months

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test-drb March 2007