test-drb December 2005

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Anyone interested in a group purchase of MCM68766 chips?

by Useddec＠aol.com

Hi Julian, I have complete M8189's for $100. Thanks, Paul

18 years, 9 months

Fujitsu SMD drive

by silvercreekvalley＠yahoo.com

Hi Recently received a Fujitsu SMD drive (85M) which seems to be in great shape. Fortunately the heads were locked when the drive was last powered down. I have the Xylogics card and cables and also various power cables. I noticed however that the drive does have 4 mounting points with rubber bushes. Does anyone have any experience in installing these drives, and what the mechanical requirements are? Were there special cases to contain the drives for example? Thanks Ian. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

18 years, 9 months

CUBIX/6809 updates

by ajp166＠bellatlantic.net

> >Subject: Re: CUBIX/6809 updates > From: Jos Dreesen <jos.mar at bluewin.ch> > Date: Tue, 13 Dec 2005 22:20:15 +0100 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > > >Am dinsdag, 13.12.05, um 16:45 Uhr (Europe/Zurich) schrieb >dave04a at dunfield.com: >>> >> >> Possibly - Although Cubix was originally designed to be the OS for my >> main >> computer, and by that fact is pretty close to what I envisioned. It >> was however >> done 25+ years ago, and there is room for improvement. I'd wait until >> some >> more people have gotten into it and see what feedback develops. >> > >A workaround for the floppy dataseparator would be very nice... > > Jos Dreesen one possible design but not tested. There are others that are better. www.analog-innovations.com/SED/FloppyDataExtractor.pdf

18 years, 9 months

Anyone interested in a group purchase of MCM68766 chips?

by ISC277＠CLCILLINOIS.EDU

Hey everyone, Are any of you interested in a group purchase of MCM68766 EPROM chips? These are used in M8189s and possibly in some other DEC equipment. I'm looking to upgrade my M8189 to a -BJ with these chips. Unfortunately the places that sell them are asking for a $150-200 minimum order. If you're interested, let me know. Julian

18 years, 9 months

Obscure Fuji Unix Computer

by bvdb＠cruzpro.com

Hi Dan, I came upon your old post and was wondering if you ever got a response. We have one working and one ocassionally working MCS16F and would love to know more about the operating system. Best Regards, Bert van den Berg bvdb at cruzpro.com Hi Everybody, If you come across the following computer, or know where to find one, or know anything interesting about it, please let me know! Labelled as: Fuji MCS-16F Alleged OS: Unix OS9 Custom User Interface Software: Fuji MCS/2E V3.33 Installed Custom I/O Cards visible on back: 1. VM1161 2. VM1410 3. VM1310 There is one 5-1/4" floppy drive installed. This appears to be a mid-1980's era customized controller, and is being used to control a mid-1980's era Fuji SMT system. The problem is that the system owners are beginning to be very nervous about the long-term feasibility of the computer/controller and are searching for a backup while preparing for a surprisingly expensive software upgrade sometime in the future. Fuji no longer supports the installed software. This is also the type of thing that one may encounter in the usual places... in a dumpster, or in a pile at an auction or, well, you know, where ever. Rest assured that this particular model of obscure computer has some worth left in it, so please let me know if you encounter one! Thanks, Dan M Bellows Falls, Vermont USA

18 years, 9 months

CUBIX/6809 updates

by henk.gooijen＠oce.com

but it would make the entry of an address (16-bit) cumbersome. You must enter it as an 8-bit high and an 8-bit low address. I'd definately would go for 16 switches in this case, and also 16 LEDs for the address. Perhaps a matter of taste ... What if you need access to xxx.nnn where xxx != 000 or 777? Why pose limits that early in the design? You might regret such a decision later ... - Henk, PA8PDP ________________________________ Van: cctalk-bounces at classiccmp.org namens woodelf Verzonden: ma 12-12-2005 23:05 Aan: On-Topic and Off-Topic Posts Onderwerp: Re: CUBIX/6809 updates Gooijen, Henk wrote: >Using the pdp8/e design fron panel for the 6809 is possible, but ... >there are only 15 Address LEDs (12 plus 3 for EMA), and the other row is >12 LEDs, so the upper 4 would not be used. The rotary knob could be used >to display A or B (or DP or CC) but to display X, Y, U, SP, PC you need >16 LEDs. There are just 12 switches, and you could use the SW switch as >the 13th, but still, to enter a 16-bit address would be cumbersome. >So, the pdp8/e panel is not the best choice, but the implementation >-hardware wise- is always possible. Software is what makes it 'tick' :-) >and I am sure that's "piece of cake" for you, Dave. > > As you all know by now I am building a 9/18 bit cpu. My front panel will be limited to 9 data switches and a address page switch. This lets me access 000.nnn and 777.nnn memory on address load. Since I plan only to use the swr for short programs on page zero and have a bootstrap rom and I/O on the last page this more than ample for me. A similar restricted front panel may be possible as well for the 6809 as data is byte orientated. Ben alias woodelf This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.

18 years, 9 months

8-bit 1.44 Drive Controller (Was: Fancy Font?)

by r_a_feldman＠hotmail.com

You can buy these new from JDR Microdevices for $28.88. You have to use this one as the primary disk controller, but it supports up to four 360kB, 720kB, 1.2MB or 1.44MB floppy drives. http://www.jdr.com/interact/item.asp?itemno=MCT-FDC-HD4 I have an earlier version that could be used as a secondary controller. I've been using it for 15 years at least. The only changes to Config.sys or Autoexec.bat that are needed are to point to the hard drive: it gets bumped up one drive letter for each floppy you add (my one 3.5" floppy is drive C: and the hard drive is then D:). Message: 12 Date: Tue, 13 Dec 2005 08:14:12 -0800 (PST) From: Al Hartman <alhartman at yahoo.com> Subject: Fancy Font? To: cctalk at classiccmp.org Message-ID: <20051213161412.18248.qmail at web30612.mail.mud.yahoo.com> Content-Type: text/plain; charset=iso-8859-1 <snip> BTW... Anyone got an AST SixPak Plus they are willing to part with? I built an XT for old times sake, but it only has 256k. I have to find one of those controller cards that will support a 1.44mb FDD also... Maybe at the Trenton Computer Festival next spring... Al

18 years, 9 months

cctalk Digest, Vol 28, Issue 39

by dm561＠torfree.net

-------------Original Message--------------- Date: Tue, 13 Dec 2005 08:14:12 -0800 (PST) From: Al Hartman <alhartman at yahoo.com> Subject: XT expansion (was Fancy Font?) BTW... Anyone got an AST SixPak Plus they are willing to part with? I built an XT for old times sake, but it only has 256k. I have to find one of those controller cards that will support a 1.44mb FDD also... Maybe at the Trenton Computer Festival next spring... Al ----------Reply--------------- Might have both for ya; contact me off-list pls. mike

18 years, 9 months

Ee?prom burners [Was: Re: CUBIX/6809 updates]

by dwight.elvey＠amd.com

>From: "Brian Wheeler" <bdwheele at indiana.edu> ---snip--- > >That said, the only thing that's really kept me from building machines >(heh, besides time and money!) is the lack of an eprom (or eeprom) >burner. > >What do you guys recommend? Are there instructions for PC-driven >burners online somewhere that seem reasonable? If not homebuilt, what's >a reasonable price for one? > Hi I recommend not getting one at all. I recommend using flash memory. There are a number of boot flash memories that would work well. You put some simple code in the boot part to get things bootstrapped up and then use the other segments of the flash for your development. Of course, you need to program the flash for the first time. For this, you could get someone to program one with your bootstrap code. Just remember, the bootstrap code should be something really simple. You might even make it something simple with a parallel port that handshakes the data. That way you could even avoid debugging the initialization sequence for a serial chip. The bootstrap code should only load into memory a fixed amount of code and then jump to that code. 256 bytes should be enough. From there, you increase the complexity as much as you like. The parallel port could be just 2 bits out and 2 bits in. Just my thoughts. Dwight >Thanks! >Brian >

18 years, 9 months

Ee?prom burners [Was: Re: CUBIX/6809 updates]

by ajp166＠bellatlantic.net

> >Subject: Re: Ee?prom burners [Was: Re: CUBIX/6809 updates] > From: "Dwight Elvey" <dwight.elvey at amd.com> > Date: Tue, 13 Dec 2005 13:55:36 -0800 (PST) > To: cctalk at classiccmp.org > >>From: "Brian Wheeler" <bdwheele at indiana.edu> >---snip--- >> >>That said, the only thing that's really kept me from building machines >>(heh, besides time and money!) is the lack of an eprom (or eeprom) >>burner. >> >>What do you guys recommend? Are there instructions for PC-driven >>burners online somewhere that seem reasonable? If not homebuilt, what's >>a reasonable price for one? >> > >Hi > I recommend not getting one at all. I recommend using >flash memory. There are a number of boot flash memories >that would work well. You put some simple code in the >boot part to get things bootstrapped up and then use >the other segments of the flash for your development. > Of course, you need to program the flash for the first >time. For this, you could get someone to program one >with your bootstrap code. Just remember, the bootstrap >code should be something really simple. You might even >make it something simple with a parallel port that >handshakes the data. That way you could even avoid >debugging the initialization sequence for a serial >chip. The bootstrap code should only load into >memory a fixed amount of code and then jump to that >code. 256 bytes should be enough. From there, you >increase the complexity as much as you like. > The parallel port could be just 2 bits out and >2 bits in. > Just my thoughts. >Dwight For CUBIX that means a bit of work as the OS is rom resident. Building a parallel port EEprom burner is trivial, Eprom for a limited design say one type is fairly easy. Code the drive the parallel port is a PC coding problem and I hate PCs. there are PCport designs on the net. myself I have a S100 board that does 2716->27128 and through a hack I've done 27512s and 27010s. Allison

18 years, 9 months

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test-drb December 2005