test-drb December 2010

test-drb@ccmp.vtda.org

154 participants
208 discussions

by scanning.cc＠gmail.com

I just bought a Data I/O 29B with an Unipak 2B from Epay. Everything seems okay BUT the pinout cartridge ( the little module that plugs in the end of the 2B ) is missing. I suspect that all it has is some kind of simple interlock like two pins tied together to tell the Data I/O the cartridge is there ( probably so you can't run the unit with that HAZARDOUS 20 volts on the open connector. Anybody know how to get around this or fake it ? The unit won't do squat without it.... Have not been able to find a schematic of the 2B or the pinout cartridge. Thanks. Best regards, Steven

13 years, 3 months

Would a bog-standard 4164 be a suitable replacement for a MCM4517 in a Sega SC3000H? (was Re: Introduction - Terry Stewart (tezza))

by ethan.dicks＠gmail.com

On 10/19/10, Mike van Bokhoven <mike at fenz.net> wrote: > Hi Terry, > > Welcome to the list, from another NZ classic-cmper. Whereabouts in NZ are > you located? Hi, Terry, I'm curious, too. I've spent about six months of the past 15 years in NZ, mostly in Christchurch, with trips to Wellington, Auckland, and Hamilton. > I also enjoy getting dead machines going; my current challenge is finding > RAM for a Sega SC3000H. I was hoping someone might have some spare MCM4517s > for sale (from memory, hopefully that number's right), Those are just +5V-only 16Kx1 DRAMs, right? The pinout is the same as the 4164 except for pin 9 (NC on a MCM4517, A7 on a 4164). Could you use a 4164 instead? (it might require a pull-up or pull-down on pin 9 so it doesn't float). Those are rather abundant and still available from a number of sources. -ethan

13 years, 3 months

Emailing: SCSI to IDE.htm

by lynchaj＠yahoo.com

SCSI to IDE Tom Gardner thomas.gardner <mailto:cctalk%40classiccmp.org?Subject=Re%3A%20SCSI%20to%20IDE&In-Reply-To= %3C5450F2940A10417780E426EC57A9C5E1%40tegp4%3E> at sbcglobal.net Wed Dec 1 17:35:52 CST 2010 * Previous message: SCSI to IDE <http://classiccmp.org/pipermail/cctalk/2010-December/294657.html> * Next message: SCSI to IDE <http://classiccmp.org/pipermail/cctalk/2010-December/294665.html> * Messages sorted by: [ date ] <http://classiccmp.org/pipermail/cctalk/2010-December/date.html#294658> [ thread ] <http://classiccmp.org/pipermail/cctalk/2010-December/thread.html#294658> [ <http://classiccmp.org/pipermail/cctalk/2010-December/subject.html#294658> subject ] [ author ] <http://classiccmp.org/pipermail/cctalk/2010-December/author.html#294658> _____ I haven't been following this thread too closely so I may have missed something, but it seems to me that the proposed solutions are overly complex. One simple solution that comes to mind is to define a set of vendor unique SCSI commands, one for each of the registers in the IDE command stack and then do all the emulation in the device driver on the host side. The interface card is just then a simple state machine; really simple if u make it a non arbitrating protocol implementation and use PIO for data transfers (SCSI-1 lives :-). Tom _____ * Previous message: SCSI to IDE <http://classiccmp.org/pipermail/cctalk/2010-December/294657.html> * Next message: SCSI to IDE <http://classiccmp.org/pipermail/cctalk/2010-December/294665.html> * Messages sorted by: [ date ] <http://classiccmp.org/pipermail/cctalk/2010-December/date.html#294658> [ thread ] <http://classiccmp.org/pipermail/cctalk/2010-December/thread.html#294658> [ <http://classiccmp.org/pipermail/cctalk/2010-December/subject.html#294658> subject ] [ author ] <http://classiccmp.org/pipermail/cctalk/2010-December/author.html#294658> _____ More information <http://www.classiccmp.org/mailman/listinfo/cctalk> about the cctalk mailing list _____ -----REPLY----- I agree and have started a new thread for a SCSI to IDE converter board over on Vintage-Computer.com forums. If you or anyone is interested in the project stop on by and help out. http://www.vintage-computer.com/vcforum/showthread.php?22906-SCSI-1-to-from- IDE-drive-converter The project is a Z80 CPU, NVSRAM, EEPROM, UART, 8255 PPI IDE, and Z53C80 SCSI-1 controller. The UART is for a serial port to program the converter board and store parameters in the NVSRAM and allows for ROM reprogramming in circuit. It is on a dual layer Eurocard and uses 14 ICs plus connectors, passives, etc. Thanks and have a nice day! Andrew Lynch

13 years, 3 months

the new manx is live

by legalize＠xmission.com

Manx is an online catalog of computer documentation. The new manx is up for beta testing here: <http://manx.classiccmp.org> Paul Williams created manx as a series of perl scripts and a database of online computer manuals. Paul has graciously provided us with a copy of the data from the database from which I reverse engineered a compatible implementation in PHP. Later, Paul provided me with the perl scripts which I used as a referene for finishing off the PHP implementation. The new manx is an open source project hosted at <http://manx.codeplex.com>. Please use the issue tracker on codeplex to report any problems you find with this new manx. You can also browse the existing issues in the tracker to see the planned enhancements. The main planned enhancement to come is supporting users and roles to allow community contributions to the database so that new additions don't have to go through a single person. Thanks to Paul Williams for providing the database dumps and scripts and Jay West for hosting the finished application. -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://legalizeadulthood.wordpress.com/the-direct3d-graphics-pipeline/> Legalize Adulthood! <http://legalizeadulthood.wordpress.com>

13 years, 3 months

H960 rack available

by quapla＠xs4all.nl

Available for one who wants it, a Dec H960 rack. No sidepanels, nor a masthead. Note, the rack is in the Netherlands. Will go to the scrappers at the end of June. -- Dit is een HTML vrije email / This is an HTML free email.

13 years, 3 months

Discferret questions

by dgriffi＠cs.csubak.edu

I'm looking at my aging desktop machine and realize that its replacement probably won't have a native floppy interface, so I started thinking about the super-powered USB-floppy interface previously discussed here. I forgot what it was called, so I stumbled across this page: http://www.deviceside.com/. I quickly figured out what I wanted was the Discferret. Does anyone know anything about this anemic alternative? This led me to some more questions: 1) Can the Discferret handle flippies? 2) Can I daisychain two drives to a single Discferret? 3) How much more work would it be to make a Discferret talk to an 8-inch drive? I'd buy one or two now, but finances aren't that great right now. -- David Griffith dgriffi at cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

13 years, 3 months

Happy New Decade

by ard＠p850ug1.demon.co.uk

Happy new decade to all members of this list and their families. [Yes, I do start counting from 0 normally. But the calendar doesn't :-(, and thus I think that new centrieies, decades, etc start with years ending in '1'.] -tony

13 years, 3 months

C64/C128 CP/M Cartridge Interest?

by brain＠jbrain.com

Would anyone on the list with CP/M or Z80 experience be interested in helping design a CP/M cart for the C64 and C128? I'd like to learn more about CP/M and the Z80, and I thought a revamped cartridge might be a nice way of learning and tying back to my CBM bias. Jim

13 years, 3 months

Source for OKI clock chip?

by snhirsch＠gmail.com

I'm trying to find a source for an OKI MSM6242 RTC chip (18-pin DIP package). As usual, all my Google searches turn up dozens and dozens of sleazy-looking "we can get you anything, submit an RFQ.." sites. This is the chip used in Amiga 2000s. I'm not sure if there are any workable cross-references. Steve --

13 years, 3 months

FS: Texas Instruments POS terminal

by charlesmorris800＠centurytel.net

No, not that kind of POS, but "Point Of Sale"! http://i1181.photobucket.com/albums/x426/DrCharlesMorris/P2150003.jpg http://i1181.photobucket.com/albums/x426/DrCharlesMorris/P2150005.jpg http://i1181.photobucket.com/albums/x426/DrCharlesMorris/P2150004.jpg It has an 8080A processor, a vacuum fluorescent display, keypad, 20 LED's, and line-operated (120 ac) power supply. I bought it from Jameco many, many (25+) years ago and am tired of tripping over it. I hate to strip it just for the 8080A and EPROMs since it looks like a good foundation for... something. Would someone like it for the bargain price of $7.00 plus the actual shipping from US zip 65775? thanks Charles

13 years, 3 months

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test-drb December 2010