test-drb June 2008

test-drb@ccmp.vtda.org

194 participants
304 discussions

by mross666＠hotmail.com

Well, here's what happened: http://www.corestore.org/coremove.htm Some days I wish I had taken up stamp collecting... Thanks to all who volunteered to give a home to the Convex! Mike http://www.corestore.org _________________________________________________________________ Search that pays you back! Introducing Live Search cashback. http://search.live.com/cashback/?&pkw=form=MIJAAF/publ=HMTGL/crea=srchpaysy…

16 years, 1 month

CP/M Z80 home brew computer circuit board

by lynchaj＠yahoo.com

> -----Original Message----- > From: Andrew Lynch [mailto:lynchaj at yahoo.com] > Sent: Friday, June 13, 2008 6:58 PM > To: 'cctalk at classiccmp.org' > Subject: CP/M Z80 home brew computer circuit board > > Hi, > > If anyone would like to make their own low cost home brew Z80 CP/M > computer please contact me by email. > > I have manufactured PCBs available for sale for $20 each plus shipping. > Preprogrammed EPROMs are also available for sale. > > The hardware and software are documented including schematics, source > code, binary images, PCB layout, parts list, etc. > > Details of the single board computer are available at: > > http://groups.google.com/group/n8vem > > Thanks! > > Andrew Lynch [AJL>] Hi All, Just in case anyone is still interested in building their own Z80 CP/M home brew SBC here is your opportunity. I have sold most of the PCBs in the first batch. As of this morning, I have less than 25% of remaining stock. I recommend that if you are going to order one of these PCBs then you should do it soon. I do not know if or when there will be another batch. If there is, it takes three weeks from my order to delivery and delivery to you is on top of that. Most likely, the demand for home brew / classic computer PCBs is fairly limited to a small group of enthusiasts. Ordering more PCBs at a practical unit cost is a delicate issue since I would like to get them out for people but also want to limit my personal expenses on this to a reasonable level. I do not expect to fully break even on the project but at least not lose my shirt on it either. Probably it means the next batch will involve a waiting list until there are enough people signed up to make the order practical. If anyone has better suggestions on how to do an amateur electronics project or a better idea, I am open to *constructive* input. I do appreciate your helpful comments. Please do not reply with "I don't like your project because..." Those comments aren't very helpful and IMO generally just contribute to the noise on CCTALK. Thank you in advance and have a nice day! Andrew Lynch

16 years, 1 month

INFOREX Core Memory Controller with DATARAM core memory cartridge / daughter card.

by billdeg＠degnanco.com

I received a box a while back containing an INFOREX Core Memory Controller >from late 1970 / early 1971 and a DATARAM core memory cartridge / daughter card. The DATARAM core is 4K I believe, but I did not open it to check. The box also contained a document (not the product docs) ranging from 1971-1978 about this type of 4K and 8K core memory, and some interesting pages about installing and using core memory with an S-100 data bus. It looks like the original owner was trying to figure out how to use this card. I assume that this particular DATARAM core memory could be used in both the pictured below DEC-like controller and a homebrew S-100 controller, but it was originally built for systems in the late 60's early 70's before the S-100 bus, etc... Given the condition of the card and memory, it's very possible that these components work. Now I just need a computer to put them in...hmmm. I have a basic idea of what the A, B and C card connectors do from some notes included with the board on a scrap of paper (assuming they're correct). For example pin 22 of connector A is a master reset, 25 is read enable, 26 is write enable. B 9 is a strobe and 13-19 are data in, etc. Let me know what info I can provide. I am not an engineer however. Pictures: http://www.vintagecomputer.net/inforex/ Can anyone shed light on the history/use of this? Thanks. Bill

16 years, 1 month

Listing paper FTGH (Yorks, UK)

by roger.holmes＠microspot.co.uk

On 21 Jun, 2008, at 08:52, cctalk-request at classiccmp.org wrote: > > Message: 33 > Date: Fri, 20 Jun 2008 22:12:04 +0100 > From: "John & Rachel" <john.haigh at zoo.co.uk> > Subject: Listing paper FTGH (Yorks, UK) > To: <cctech at classiccmp.org> > Message-ID: <000501c8d31a$4fa20dd0$4401a8c0 at JOHN> > Content-Type: text/plain; charset="iso-8859-1" > > Must be a common problem getting rid of spare paper. Did you get > any takers as I have some too. Anyone who was disapointed? Hi, Not disappointed, but Yorkshire is just too far away and paper is heavy so shipping is too expensive. If anyone in the Kent/Sussex/ Essex area has any cheap listing paper at least 13" wide (for a 120 column drum line printer) I would be interested. I am also interested in punched card drawers, paper tape cabinets, one more paper tape winder, an engineer who can repair IBM keypunches, 4mm patch cables for IBM patch panels (they have ball bearings in the plugs), an IBM keypunch control drum, data plugs or cables for connecting to IBM keypunches and Flexowriters. Any documentation or other items related to the ICT 1300 series, especially the mysterious 1302 would be a real gem to find. I have quantities of blank paper tape and blank punched cards if anyone needs them, though I am always on the look out for more in different colours so I can easily recognise programs at a distance. Roger Holmes

16 years, 1 month

Good Composite->VGA converters for classic computers (& video games...)

by derschjo＠msu.edu

Anyone out there use a composite->VGA upscaler for their classic computing and/or gaming needs? I've been looking to shave a bit of space off my workbench and just use a single SVGA monitor instead of that and an old composite monitor. I picked up one of these: http://www.amazon.com/gp/product/B000XXZQWQ and while it works great for certain systems (the C64 and NES, for example) it gets really confused by the composite signal coming from other systems (like the Apple II and Sega Genesis) and is unusable with them. Anyone have any recommendations? Thanks, Josh

16 years, 1 month

Daystar Universal PowerCache & SE/30...

by derschjo＠msu.edu

Scored a nice find for 50 cents today, a 50Mhz 68030 Daystar "Universal PowerCache" accelerator card. From my research on the web this should be SE/30 compatible, but requires some manner of a PDS adapter which is essentially impossible to find. The card won't physically fit in the SE/30 due to the metal chassis getting in the way -- anyone know if this is the only reason the adapter is needed, or are there electrical differences as well? As my SE/30 is kind of a mongrel anyway I wouldn't mind hacking up the chassis a bit to allow the card to fit, but if the adapter is actually necessary I won't bother... Thanks, Josh

16 years, 1 month

One tonne 'Baby' marks its birth

by ray＠arachelian.com

http://news.bbc.co.uk/1/hi/technology/7465115.stm One tonne 'Baby' marks its birth By Jonathan Fildes Science and technology reporter, BBC News Baby project team The four remaining members of the Baby team will be honoured in Manchester Sixty years ago the "modern computer" was born in a lab in Manchester. The Small Scale Experimental Machine, or "Baby", was the first to contain memory which could store a program. The room-sized computer's ability to carry out different tasks - without having to be rebuilt - has led some to describe it as the "first modern PC". <snip>

16 years, 1 month

Ted - Historian George Dyson tells stories from the birth of the modern computer -- from its 16th-century origins to the hilarious notebooks of some early computer engineers.

by ray＠arachelian.com

http://www.ted.com/index.php/talks/view/id/278 Historian George Dyson tells stories from the birth of the modern computer -- from its 16th-century origins to the hilarious notebooks of some early computer engineers.

16 years, 1 month

sell/donate: Wang Professional Computer in Columbus Ohio

by tosteve＠yahoo.com

------------------------------------------------------------ This is not my system, please email Martha if interested. ------------------------------------------------------------ From: Martha Shaw <mshaw at columbusschoolforgirls.org> Subject: RE: selling a Wang Wordprocessor Date: Wednesday, June 18, 2008, 3:45 PM I have a Wang word processor from the 1980's. I would like to sell it or donate it (take a deduction) if I can. It's called the Wang Professional Computer in it's manual which is copyrighted 1985. This one was used for training when the person who owned it worked at home and trained others when she worked for Wang. It works and has a printer, as well as 10 printer wheels and 11 ribbons. Martha Shaw ------------------------------------------------------------ This is not my system, please email Martha if interested. ------------------------------------------------------------

16 years, 1 month

IBM Switch assembly

by cclist＠sydex.com

> Date: Fri, 20 Jun 2008 20:45:45 -0700 > From: jim s > not impossible it's off a 1620. have you searched photos of it? Not a 1620--the system used a much wider row of switches and indicators. Not a 1401 or 7090 match either, from my memory, but could be a 704 power switch assembly. Cheers, Chuck

16 years, 1 month

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test-drb June 2008