test-drb

test-drb@ccmp.vtda.org

101090 discussions

by walkerpa＠ihug.co.nz

Tony > How much memory? My 9817 has 2 megabytes. Should be ample. > Of course the drive unit in the 9154 is very much HP custom, with a > _strange_ interface (parallel 8 bit data bus for head > positioning/control, and then the raw data lines for read/write). So no > real chance of using something else there. > > How useful is a hard drive? I know the previous owner of my 9817 ran it > from a 9122 floppy drive only. Convenience, I suppose, to eliminate disk swapping / floppy drive wear / grease problem. My 9153 continues to function, and I am religious about cleaning the floppy drive. And using new or newish floppy disks. Regards, Peter -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.405 / Virus Database: 268.12.9/456 - Release Date: 25-09-2006

19 years, 8 months

Commodore keyboards and PCs

by dm561＠torfree.net

--------------Original Message: Date: Fri, 22 Sep 2006 07:47:11 +0100 From: Gordon JC Pearce <gordon at gjcp.net> Subject: Re: Commodore keyboards and PCs >M H Stein wrote: >> Not to take any business away from Jim and they are a little expensive, >Erm... If you just wanted to encode switch presses to a PS/2 input, why >not just buy an el-cheapo keyboard for about ?2 from your friendly >neighbourhood computer shop and set about it? Bit better than the $100... >Gordon -------------Reply: True enough, but you don't have the look & feel or the C64 key labels & layout; I think the idea is to use a defunct C64 and use it as a keyboard for the emulator. In fact, since it's a snap to upload different conversion tables into it you could use it for several different emulators of systems using RS-232 or matrix (and probably ASCII as well) keyboards, all on the same computer; just plug in the appropriate keyboard, upload the matching table and it's just like the real thing but without the "real" hardware. Also I thought I'd mention it for the RS-232<>PC keyboard option, something I've found useful for several applications; interfacing to otherwise inaccessible systems and replacing terminal keyboards are two examples. Finally, the folks at Hagstrom have always been friendly & helpful and I thought I'd give 'em a plug :) m

19 years, 8 months

Dymo Labelwriter 330 Turbo (data)

by aliensrcooluk＠yahoo.co.uk

Hi folks, I was wondering if anyone has any data on the Dymo Labelwriter 330 Turbo? I would like to use it with my Amiga 600, but alas Dymo haven't made a driver for it! I tried writing to them attempting to get some technical documents on the printer with no luck. Has anyone attempted to write (or written) a driver for it for retro computers? Does anyone have one and (sorry!) a PC/laptop? I nee d some kind person to intercept and retrieve the data sent from the PC to the printer when printing a blank label and a completely black label, so I can compare the data between the two. Regards, Andrew B aliensrcooluk at yahoo.co.uk

19 years, 8 months

RX02 Problem solved...

by gkaufman＠the-planet.org

Thanks to tremendous help from several folks I've isolated my formatting problem. Turns out to be a hardware issue with the DY1: drive. I've tried cleaning heads etc. The read/write boards are fine ( I swapped them with my Decmate I to check). So now I need a single drive for an RX02. Any idea's of a source? Many thanks! - Gary

19 years, 8 months

Fwd: [clue-tech] OT: Old equipment to give away / donate

by rtellason＠verizon.net

Found on another list... ---------- Forwarded Message ---------- Subject: [clue-tech] OT: Old equipment to give away / donate Date: Sunday 24 September 2006 03:19 pm From: "Chris N. Brown" <katanacb at comcast.net> To: "CLUE tech" <clue-tech at cluedenver.org> Sorry for the off-topic posting. I've got some old Sun and Intel-based equipment that I'd like to get rid of. I'm not sure if they are of value to anyone (if so, email me and I'll let you know what I've got) but I was wondering if anyone had any ideas or information on places to dispose of it all. Things range from a Sun 17" monitor to misc peripherals to towers. I'm planning to put an ad up on, say, craigslist saying "if you want them come get them" but on the chance that no one does, was looking for some pointers on proper disposal. (recycling, donation, give 'em to Goodwill, etc). Cheers, Chris _______________________________________________ clue-tech mailing list clue-tech at cluedenver.org http://www.cluedenver.org/mailman/listinfo/clue-tech ------------------------------------------------------- -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, a critter that can be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin

19 years, 8 months

Bet you didn't know...(PDP-11)

by bqt＠softjar.se

Allison <ajp166 at bellatlantic.net> wrote: >>Subject: Re: Bet you didn't know...(PDP-11) >> From: "Zane H. Healy" <healyzh at aracnet.com> >> Date: Tue, 19 Sep 2006 08:30:40 -0700 >> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>, >>cctech at classiccmp.org >> >>At 7:09 AM -0400 9/19/06, Allison wrote: >> >>> > >>> >>>>Subject: Bet you didn't know...(PDP-11) >>>> From: Julian Wolfe <fireflyst at earthlink.net> >>>> Date: Tue, 19 Sep 2006 00:07:49 -0500 >>>> To: "General Discussion: On-Topic and Off-Topic Posts" >>>><cctalk at classiccmp.org> >>>> >>>>As of September 30, 2006, the last PDP-11 that rolled off the line >>>>will finally be 10 years old. >>>> >>>>The PDP-11 EOL was actually September 30,1996. >>> >>>Mentec continued it and you can still buy new 11 based boards. >>> >>>Allison >> >>Is Mentec still selling them? From the last time I looked at the >>website, it looked like they were only reselling emulators instead of >>real hardware now. >> >>Still up until recently they were selling new boards. >> >> Zane > > > They may well have stopped cpu production but only recently.The only CPUs > that have been around near as long in production are: > > PDP-8 (cmos 6100 and 6120) > 1802 > Z80 Well, you can maybe still buy Quckware PDP-11 boards, so there are still new PDP-11 systems shipped. http://www.quickware.com/ Also, I'm not sure what I would call Strobe Data's Osprey systems... (http://www.strobedata.com/) But yeah, I think Mentec have stopped selling hardware. None of the CPUs mentioned above comes near the PDP-11 in longevity, even though they are long runners. The best candidate is maybe the Z80, since it's still in production and going strong. Not sure if the 1802 still is around, both the 1802 and Z80 came years after the PDP-11. The PDP-8 systems stopped manufacturing quite a while ago, and while they started before the PDP-11, I think the PDP-11 have passed them now. Johnny

19 years, 8 months

RX02 drives / RT11

by gkaufman＠the-planet.org

I'm relearning RT-11 on an 11/23 I was kindly given (thanks David!). I'm having trouble with the RX02 drives. I can boot RT11, and .format DY1: About 1/3rd of the time I get an error while formatting, this is on known good 8" SS/DD media that has been extensively tested on a CP/M system in both SD and DD modes. On media which does format fine, I get gobs of bad blocks using .initialize/badblocks DY1: The only media that seems to work fine is "real" RX02 media. Is the RX02 incapable of formatting it's own media? Is there a common hardware problem that I should look for? Filter caps? Clean the stepper motor? Many thanks. - Gary

19 years, 8 months

Getting started with HP9000/200

by walkerpa＠ihug.co.nz

Hi Tony > 1) What softwware do people recomend? HP BASIC looks reasonable, > actually, it does at least support named procedures with formal > parameters. Anything else reocmended? HP BASIC is quick to put together and powerful. The documentation is good and available (as you've seen, or got). I think the documentation was one of HP's strong points with these machines. HP Pascal gives you the speed, but you'll definitely need more memory ... > 2) How much RAM do I reasonably need. If I pulled one of the 256K cards > from the 9816 so I could add a DIO I/O card, would the machine still be > useful? My programming career started with HP9816s' with only the 256K on-board RAM; that was using Basic 2 originally, then Basic 3. And we got by - the company didn't want to spend any more than it had too! That was in civil engineering & construction where we were able to put together costing, critical path planning, and some envelope & pre-stress design software. Whilst it is certainly constraining, so you'll probably be ok with one add-on RAM card for a lot of things. Later on, I got involved with a land surveying package, which besides being able to do a multitude of cadastral calculations, included a fairly comprehensive CAD facility. That definitely needed more RAM, and was standardised with a 1MB add-on card. For all above software, the only IO we did was RS232 for HPGL plotting, so only needed the built-in port. > 3) I've been reading the 9836 service manual [2]. I makes reference to > the 'Developer's Documentation' or some such, which apparently contains > information for people who want to design DIO cards and/or port OS's to > the machines. Does anyone have this (it's not on bitsavers or the > Australian museum that I can see). It certainly sounds like something I > should read if I can. Haven't seen or heard of this. > 4) Anything elase I need, or should keep an active lookout for? Probably 913x/915x spare hard drives, unless you're able to get the drives at http://www.bering.com/main.htm Regards, Peter Walker --HP9000/200 tinkerer, and still looking for Pascal 3.1! -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.405 / Virus Database: 268.12.8/455 - Release Date: 22-09-2006

19 years, 8 months

New find, Heathkit H89 computer.

by ajp166＠bellatlantic.net

> >Subject: New find, Heathkit H89 computer. > From: "Bob Shannon" <bshannon at tiac.net> > Date: Sat, 23 Sep 2006 20:44:31 -0400 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > >I've just come across a new vintage system. > >I've been given a Heathkit H-89 computer with some documentation and one >bootable diskette. > >Its booting HDOS, but I don't have any HDOS specific documentation, just the >'Operation' and >assembly manuals (the 'Operation' manual is really theory of operation >material). > >Does anyone have the ability to make a set of 'distribution' HDOS disks >(100K floppy)? > >Is CP/M also available, or the Heathkit diagnostics disk? > >I've not been able to find much HDOS documentation on-line, does anyone have >pointers? CP/M was available. One thing, which disk controller does it have? If memory serves there were several different ones between heath and aftermarket. Allison >

19 years, 8 months

Data General Nova 3 manuals needed

by g-wright＠att.net

Hi, I have a Nova 3 that I would like to get to know a little better. I do not have any manuals and a quick search came up with a dead end. Info on testing and how to interface to the console port ?? (external term). Is it TTY or RS232 and of coarse which pins or ??? Bruce are you out there ???? ;-) Below is the card lay out Thanks, Jerry Function MFG No. EK No. -12 Transport 4190/4041/4044 063-130 -11 FMDET 4190/4041/4042/4044 063-147 -10 <- B side oneida, Vanes A side -> MBD 4042 063-131 -09 -08 Disk Cartridge Controller DG 6030 -07 -06 -05 Mos Memory DG 8543 -04 Cassette I/O DG 4075 4077 4078 4079 -03 Mos Memory DG 8543 -02 Nova 3 Triple options bd. DG 8553/8531/8535 -01 Nova 3 CPU DG 8530/8531 W/ARST. APL

19 years, 8 months

360kB HH Floppy Drive

by Mzthompson＠aol.com

Try the following link: http://marina.mfarris.com/theref/theref.html Text from the search engine: > TheRef(tm) is also available in file form. The latest version is 4.5a, > released on 6 May 1996, which is a partial update to the last full > version, 4.3. ... Has info on FDD, HD and optical drives. As it says above "available in file form", but I did't look for it when I was there just now. If it is not available anymore in file form, I have the files from downloading them back in 1997. Mike

19 years, 8 months

Heathkit H89

by jack.rubin＠ameritech.net

> Date: Sat, 23 Sep 2006 20:44:31 -0400 > From: "Bob Shannon" <bshannon at tiac.net> > Subject: New find, Heathkit H89 computer. > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: <001e01c6df72$d19c6030$0100a8c0 at screamer> > Content-Type: text/plain; format=flowed; charset="iso-8859-1"; > reply-type=original > > I've just come across a new vintage system. > > I've been given a Heathkit H-89 computer with some > documentation and one > bootable diskette. > > Its booting HDOS, but I don't have any HDOS specific > documentation, just the > 'Operation' and > assembly manuals (the 'Operation' manual is really theory of > operation > material). > > Does anyone have the ability to make a set of 'distribution' > HDOS disks > (100K floppy)? > > Is CP/M also available, or the Heathkit diagnostics disk? > > I've not been able to find much HDOS documentation on-line, > does anyone have > pointers? > > Come on by and visit us at www.sebhc.org , a site dedicated to the Heathkit 8-bit computers (mostly H8 and H89, but the 680x trainers as well). We have extensive online archives with docs and software. Also, be sure to take a look at Eric Rothfus' SVD ( www.thesvd.com/SVD ) which includes HDOS and CP/M boot images ready to plug and ply on the H89. Jack -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.405 / Virus Database: 268.12.8/455 - Release Date: 9/22/2006

19 years, 8 months

360kB HH Floppy Drive

by ajp166＠bellatlantic.net

> >Subject: Re: 360kB HH Floppy Drive > From: "Charles E. Fox" <cfox1 at cogeco.ca> > Date: Sat, 23 Sep 2006 16:33:21 -0400 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > > > Is there any easy way of telling a 360 K from a 1.2 Meg? I >have a bunch of 5 1/4 drives. > > Charlie Fox Yes. The model numbers on the drive. 360k drives are 40 track, 2 sided 48tpi. Here are a few... For Teac: FD55A Full height FD55B 48tpi 40 track two sided FD55c ???? FD55D ???? FD55E 96tpi 80 track single sided. FD55F 96tpi 80 track two sided FD55G 96tpi 80 track two sided dual speed Fujitsu 2851A 40 track 2 sided Toshiba 5425 40 track 2 sided Shugart SA400 35 track 1 side full height SA400L 40 track 1 side full height SA450 40 track 2 side full height Allison

19 years, 8 months

Commodore keyboards and PCs

by joachim.thiemann＠gmail.com

> From: Jim Brain <brain at jbrain.com> > To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> > Date: Fri, 22 Sep 2006 17:10:39 -0500 > Subject: Re: Commodore keyboards and PCs > Technically, C=Key is designed to work inside a perfectly functional C64 > or C128. If the 64 is on, it will convert PS2 inputs to C64 keypresses > (in combination with the current 64 KB). If the 64 is off, it will > convert the C64 KB actions to PS2 KB events. I was thinking... isn't the PS/2 keyboard protocol simply a low-bitrate serial protocol at TTL levels? Could the 6510 then not act as the microcontroller? That is, why not connect the user port to the PS/2 port and run a program on the C64 to send the keypresses to the PC? Of course, this runs dangerously into the direction of a "why use an emulator if you have the real thing" kind of debate... :-) Joe.

19 years, 8 months

Getting started with HP9000/200 series machines

by ard＠p850ug1.demon.co.uk

I seem to be getting interested in HP9000/200 stuff.... So far I've got (IIRC) : HP9816 with the compact keyboard. This has 768K RAM (256K on the CPU board, 2 off 256K RAM boards, one in each DIO slot). HP9817 + HP-HIL keyboard and monitor. 2M RAM (2 off 1M RAM cards), text and graphics video boards. And therefore 2 empty DIO slots, both with external access [1] [1] These machines have expansion slots called 'DIO'. Some cards have brackets with connectors on them, for example an RS232 board. The spacing of the slots in the backplane is half the height of the connector bracket, so such cards go in every alternate slot. The intermediate slots can be used for RAM cards, the DMA controller, and so on. The video card in the 9817 takes a pair of slots, the text card has a bracked with aBNC connector fro video output, the graphics card fits in the slot immediately above it, and carries a ribbon cable that links to the text card. HP9836A. This one is hard to get to at the moment, so I am working from memory. I think it has 1M RAM (4 off 256K cards), and therefore 4 avaialbe DIO slots, all with external access. I have the monitor, and of course it has 2 built-in 5.25" floppy drives. Assorted DIO cards. The useful ones are a couple of GPIOs, a low-speed HPIB DMA controller,, and an RS232 card. The last will almost certainly end up in the 9836, which doesn't have RS232 as standard (my other 2 machines do). As regards drives, I have a 9122 with the normal grease problem (hut the heads are OK). I can probably find a few 9121a, a 9133H, and a 9154, if they're going to be useful. I also have HP BASIC 5.0 and 5.1 on original 3.5" disks. I'll prboably use these machines (as far as I use them at all) in much the way HP intended -- as control/logging systems. Questions : 1) What softwware do people recomend? HP BASIC looks reasonable, actually, it does at least support named procedures with formal parameters. Anything else reocmended? 2) How much RAM do I reasonably need. If I pulled one of the 256K cards >from the 9816 so I could add a DIO I/O card, would the machine still be useful? 3) I've been reading the 9836 service manual [2]. I makes reference to the 'Developer's Documentation' or some such, which apparently contains information for people who want to design DIO cards and/or port OS's to the machines. Does anyone have this (it's not on bitsavers or the Australian museum that I can see). It certainly sounds like something I should read if I can. 4) Anything elase I need, or should keep an active lookout for? [2] Yes, it's a boardswapper guide. No, I don't approve of boardswapping. But that doesn't mean I don't read the manuals. There are some useful points in it. -tony

19 years, 8 months

CompuPro floppy controller differences

by ajp166＠bellatlantic.net

> >Subject: Re: CompuPro floppy controller differences > From: ard at p850ug1.demon.co.uk (Tony Duell) > Date: Fri, 22 Sep 2006 23:42:29 +0100 (BST) > To: cctalk at classiccmp.org > >> >Are they really that common in the States? They are not at all common in >> >the UK any more, so don't think of that as being a source for 50Hz pulleys... >> >> If you were her than 50hz pulleys are a non issue. ;) > >Sure, but if anyone was mad enough to bring their collection across to >England, they would not be able to find the right pulleys... > >> >> Lifes rough. The solution I used once for a 50hz and later a 400hz motor >> was a simple transformer output pushpull amp fed with a wein bridge osc, > >Sure. > >I am told (and probably have the service sheet for) there was an AC/DC >mains radiogram sold in the UK that had an AC motor for the record >turntable. There was a unit, only used on DC mains, that consisted of 3 >valves, acting as an oscillator and push-pull output (the last 2 valves >were probably 50L6s.). Of course there was no HT rectifier, since it was >only used on DC mains (The radio/amplifier section was the normal >series-string heaters and half-wave rectifier type of thing). > Not the same thing though may be the same idea. What I have is a unit I designed as a variable frequency power source (115-125VAC) self contained that runs off line power (has own PS) and run AC motors to 100W in the range of 25-500hz. Very handy for older audio tape decks that are slightly off speed or if you slew the tape while hearing it (off speed). Mine is a proto I built 30 years ago and the production version was used to run a 3M 1" 8track commercial deck for studio use. Many of the multitrack decks had DC motor contros but not all. That variation allowed for a computer interface to alter speed off spec to find and sync timecodes on the tape. The controller also managed the deck for FF, forward, rewind, speed select and stop. Very impressive to see two decks running 14 tracks of music and this would sync both perfectly or offset as desired (for effects). That system used sinewave drive to keep noise out of the system as we found square waves worked fine but the amps and all tended to hear it.. and harmonics of it. I also have a smaller version that runs from 12V battery for smaller motors to 30watts. Most motors tolerate a squware wave source so efficientcy can be very high. The trick of running AC motors off variable frequency also is used for my antenna rotator (ham radio) so I can make large changes in azmuth with acceleration and deceleration as most rotator are AC motors and the antennas have some interta (15 and 18 foot booms). This also has a microcontroller (8749) to manage the position and motor controls. Doing it with a solidstate converter is far more efficient than motor driven alternators for frequency conversion at low power. Much quieter too. I've since seen the same thing for done for large (10hp and up) motor controller. The whole show comes from the days of doing audio consoles both analog and early digital. Obviously the method could also produce 230V AC if desired. So 50hz pulleys, no problem! Allison

19 years, 8 months

Amiga 2000

by chrism3667＠yahoo.com

intererted if it works...located in NE Pennsyltucky LOL __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

19 years, 8 months

Amiga 2000

by tpeters＠mixcom.com

I need to get rid of an Amiga 2000. Any interest? IF there's a few buck in it for me, hurrah, else I'd like it to have a decent home with someone who's interested in Amiga. It was Don's. -T

19 years, 8 months

CompuPro floppy controller differences

by ajp166＠bellatlantic.net

> >Subject: Re: CompuPro floppy controller differences > From: ard at p850ug1.demon.co.uk (Tony Duell) > Date: Wed, 20 Sep 2006 23:16:24 +0100 (BST) > To: cctalk at classiccmp.org > >> >> On Tuesday 19 September 2006 18:57, Tony Duell wrote: >> > > I also have/had a horrible one, originating from a Philips mini (PTS6000) >> > > which used 115VAC for one of the motors >> > >> > Most [1] 8" droves had mains-operated spindle motors, often 115V >> > (although 230V versions did exist). Note that the spindle speed depends >> >> Actually, I've got one that is set to run on 240V, 60Hz. It's out of a > >Needless to say the voltage is not that critical. 220V, 230V, 240V are >all the same :-) > >> (broken and now disassembled) IBM 3274 terminal controller (for the microcode >> floppy, of course). >> >> > [2] One reason I wouldn't conssider moving my collection to the States. >> >> Oh come on, The Great Dr. Duell isn't afraid of replacing SMT chips on boards, >> but is afraid of having to change a few pulleys? Something sounds fishy >> here... > >Oh, I'd be happy to change the pulleys and reset the belt tensions. The >problem is _getting_ the pulleys. Do you want to be the chap who phones >Seagate and says 'Hello, I think you used to be Shugart, do you have the >60Hz conversion kits for the SA801, SA851 and SA4000 in stock' Pft! If you brought them here you'd find spares from used drives or even working domestic versions. Non of those floppies are exactly rare and even the SA4000 is still around. Allison

19 years, 8 months

Commodore keyboards and PCs

by dm561＠torfree.net

Date: Sat, 23 Sep 2006 09:13:18 +0100 From: Gordon JC Pearce <gordon at gjcp.net> Subject: Re: Commodore keyboards and PCs >>> Erm... If you just wanted to encode switch presses to a PS/2 input, why >>> not just buy an el-cheapo keyboard for about ?2 from your friendly >>> neighbourhood computer shop and set about it? Bit better than the $100... >> >>> Gordon >> >> -------------Reply: >> >> True enough, but you don't have the look & feel or the C64 key labels & layout; >> I think the idea is to use a defunct C64 and use it as a keyboard for the emulator. >That's why you use an el-cheapo keyboard and pull the board from it, and >hook up your own matrix... Ah, I misunderstood; I thought you meant just relabel the keys. Mind you, rewiring the matrix would make the keyboard incompatible with the C64 (although it'd be a relaxing project for a Saturday afternoon...) I didn't mean that it _had_ to be defunct, just that if you only had a non-repairable C64 this'd be a good way to have its equivalent; if your PC had video out as many of them do these days, you could even hook it up to a Commodore monitor for the real look&feel. But if all you need is input from a few buttons or switches like for a dedicated MP3 player for example, using the guts from a keyboard is a quick & easy way to go (as ethan described); have done that too for a few projects. Interesting to see how they've shrunk over the years, from 2 or 3 LSI and a half-dozen TTL glue chips to a tiny blob of epoxy... mike

19 years, 8 months

360kB HH Floppy Drive

by ploopster＠gmail.com

Does anyone have an extra 360kB HH 5.25" PC-compatible floppy drive lying around? Or maybe two? Peace... Sridhar

19 years, 8 months

11/34 failing trap test

by pete＠dunnington.plus.com

On Aug 19 2006, 9:38, Wolfe, Julian wrote: > I got the 11/34 up and running, and I loaded XXDP. It fails the trap > test. The instructions state you should examine the stack pointer > (777706) which shows it to be a value of 000470. This is supposed to > tell you the address of the Program Counter, right? So I load address > 470, and the value is 000330. What instruction is failing? Am I > reading this right? Yes, the stack pointer points to the last address used on the stack, and that will be the value of the PC when it called the error subroutine, or to put it another way, the address of the next instruction to be executed had the JSR not been taken. It's failing at whatever test was just before location 330 -- which is surprisingly low. You'd need to look at the listing to see what the test was. -- Pete Peter Turnbull Network Manager University of York

19 years, 8 months

CompuPro floppy controller differences

by ajp166＠bellatlantic.net

> >Subject: Re: CompuPro floppy controller differences > From: ard at p850ug1.demon.co.uk (Tony Duell) > Date: Thu, 21 Sep 2006 22:28:09 +0100 (BST) > To: cctalk at classiccmp.org > >> >Oh, I'd be happy to change the pulleys and reset the belt tensions. The >> >problem is _getting_ the pulleys. Do you want to be the chap who phones >> >Seagate and says 'Hello, I think you used to be Shugart, do you have the >> >60Hz conversion kits for the SA801, SA851 and SA4000 in stock' >> >> Pft! If you brought them here you'd find spares from used drives or even >> working domestic versions. Non of those floppies are exactly rare and even >> the SA4000 is still around. > >Are they really that common in the States? They are not at all common in >the UK any more, so don't think of that as being a source for 50Hz pulleys... If you were her than 50hz pulleys are a non issue. ;) >And those were the easy drives. I guess RK05s wouldn't be too hard to >find 60Hz pulleys for either. What about RX01s/02s? Do RK07s need >converting? RL's I know don't. But my ASR33 would. And all my audio tape >recorders (some of which may never have had 60Hz varients). Lifes rough. The solution I used once for a 50hz and later a 400hz motor was a simple transformer output pushpull amp fed with a wein bridge osc, a very good way to generate variable frequency sinewavs in the <100W class. so happens I had a 12.6V CT (12A) transformer with the requisite 120V primary. Into a lamp load it was under 1% THD and voltage stability was as good (5%). I ended up using it for all sorts of AC motor control solutions. Didn't require special parts or machine shop either. >Don't worry, I am not going to move to the States. It would be totally >impractical for a lot of other reasons. Whats practicality got to do with anything? :) Allison

19 years, 8 months

Commodore keyboards and PCs

by dm561＠torfree.net

Not to take any business away from Jim and they are a little expensive, but wouldn't an off-the-shelf keyboard encoder do the job? I've used Hagstrom's KE24s ($99.99) for years, albeit in RS-232<>PS/2 mode. User-programmable matrix or discrete switch inputs to PC keyboard or RS-232, as well as RS-232 to/from PC keyboard. www.hagstromelectronics.com/modules.html mike -----------Original messages: Date: Thu, 21 Sep 2006 07:27:40 -0400 From: "Richard A. Cini" <rcini at optonline.net> Subject: RE: Commodore keyboards and PCs To: "'General Discussion: On-Topic Posts Only'" <cctech at classiccmp.org> Message-ID: <005901c6dd70$f2f2c570$6401a8c0 at bbrrooqpbzx6tz> Content-Type: text/plain; charset=US-ASCII Yep, saw the DIY package. I was looking for the boards already done. This is not a front burner project for me just yet (other things in the hopper right now), so I'll keep an eye out. Any idea of timing for boards? Rich Rich Cini Collector of classic computers Lead engineer, Altair32 Emulator Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/ Web site: http://www.altair32.com/ /***************************************************/ -----Original Message----- From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org] On Behalf Of Jim Brain Sent: Wednesday, September 20, 2006 10:07 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: Commodore keyboards and PCs Richard A. Cini wrote: > All: > > > > I'm playing around with VICE, the Commodore emulator and I > wondered how others who use it deal with key remapping. Sometimes I find it > hard locating the mapped keys because I look at the keycap and of course, > the key is wrong (like TAB is CTRL, ESC is RUN/STOP, etc.) > > > > I'm looking for suggestions beyond sticking little labels on my > keyboard :-) > > www.jbrain.com/vicug/gallery/c=key/ Jim

19 years, 8 months

DG Nova 3 wanted (UK)

by julesrichardsonuk＠yahoo.co.uk

Had a query from a chap looking for a DG Nova 3 in the UK, as part of a museum project for English Heritage. I'm still gathering details, but I'm getting the impression that the look is far more important than operational status, as the software (and associated network) that used to run with the particular system he's trying to recreate is long-gone. (Hence I've mentioned just getting a mock-up done as one possibility) Anyone have a line on any Nova 3 systems left in the UK though? They never did seem that popular outside the US; I know all we have at the museum are a few stray boards. cheers Jules -- If you've ever wondered how you get triangles from a cow You need buttermilk and cheese, and an equilateral chainsaw

19 years, 8 months

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