Motorola SDA7 Dual Transistor

I am trying to LTSpice simulate a DEC H-724 power supply from a PDP-12. It includes a Motorola SDA7 dual transistor. I can find any information on this part. Anyone have any info? -- Michael Thompson

Re: Anybody has Control Data (CDC) disk packs for 841 and 844 disk drives to spare with?

On 06/04/2017 02:43 PM, jim stephens via cctalk wrote: > Note as a side story, they had been doing something similar to a > source control program, so though the above sounds like a fantastic > amount of software, some times one or two card drawer racks contained > dozens of revisions of the same

RE: Anybody has Control Data (CDC) disk packs for 841 and 844 disk drives to spare with?

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of jim > stephens via cctalk > Sent: 04 June 2017 22:43 > To: General Discussion: On-Topic and Off-Topic Posts > Subject: Re: Anybody has Control Data (CDC) disk packs for 841 and

Re: Pet 8032 in 40 column mode?

Doe this command in basic cause your 8032 into thinking it's a VIC 20": poke41,16:poke4096,0:new I did not actually try this, does it work? Bill On Sun, Jun 4, 2017 at 5:57 PM, Ray Arachelian via cctalk < cctalk@classiccmp.org> wrote: > Hi, I seem to vaguely recall that there was a poke to

Pet 8032 in 40 column mode?

Hi, I seem to vaguely recall that there was a poke to enable 40 column mode on the 8032, anyone know what it is? Couldn't find it in the Pet FAQ.

Re: RK11-D print set

> From: Marc Howard > Although I can find the RK11D users manual on the web there doesn't > appear to be print set (schematics) out there. Does this exist > somewhere under a non-obvious name? ??? I just did a quick Google for 'RK11-D" (note quotes), and it turned up:

Re: Anybody has Control Data (CDC) disk packs for 841 and 844 disk drives to spare with?

> On Jun 4, 2017, at 12:02 PM, Chuck Guzis via cctalk > wrote: > > On 06/04/2017 11:47 AM, Al Kossow via cctalk wrote: >> >> >> On 6/4/17 3:35 AM, ANDY HOLT via cctalk wrote: >> >>> I would think it "not too difficult" to build a modern controller >> >> The

Re: Anybody has Control Data (CDC) disk packs for 841 and 844 disk drives to spare with?

On 6/4/2017 2:11 PM, Rob Jarratt wrote: In my case this is not with the intention of running anything, I don't have an ICL 1905E (!). All I want to do is recover the data on the disk as it may contain what is possibly the only copy anywhere of an operating system that was built at

Commodore Pet 8032 keyboard repair - conductive or capacitive?

I have a pair of 8032 Pets. One of them has a short on the motherboard that causes the fuse to blow whenever it's turned on - looks like its previous owner tried to repair it as the power connector is a bit burned and a new, non-pet power connector has been added. Likely one of the power

RE: Anybody has Control Data (CDC) disk packs for 841 and 844 disk drives to spare with?

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of jim > stephens via cctalk > Sent: 04 June 2017 21:41 > To: Chuck Guzis via cctalk > Subject: Re: Anybody has Control Data (CDC) disk packs for 841 and 844 disk > drives to

Re: Anybody has Control Data (CDC) disk packs for 841 and 844 disk drives to spare with?

On 6/4/2017 12:02 PM, Chuck Guzis via cctalk wrote: It doesn't even have to be poorly stored. I moved a system with 4 300mb memorex 10 (or so) platter drives eons ago, which had been running for a year or more. After setup and service it ran 2 hours before eating one of the drives. That

Re: Anybody has Control Data (CDC) disk packs for 841 and 844 disk drives to spare with?

On 06/04/2017 11:47 AM, Al Kossow via cctalk wrote: > > > On 6/4/17 3:35 AM, ANDY HOLT via cctalk wrote: > >> I would think it "not too difficult" to build a modern controller > > The electronics isn't the problem. Getting a poorly stored > electromechanical device to not turn your or any

Cdc 883-91

I have a crashed CDC 883-91 disk pack. Looks clean, stored properly. Bill Degnan twitter: billdeg vintagecomputer.net

Re: RK11-D print set

Marc Howard wrote: > Although I can find the RK11D users manual on the web there doesn't appear > to be print set (schematics) out there. Does this exist somewhere under a > non-obvious name? The RK11-D controller maintenance manual is on Bitsavers at:

Re: RK11-D print set

weird I would have missed that, it's the most common unibus disk interface there is http://www.computerhistory.org/collections/catalog/102749003 I'll have it up on bitsavers by noon PDT On 6/3/17 5:56 PM, Marc Howard via cctalk wrote: > Although I can find the RK11D users manual on the web

Re: RK11-D print set

I'M slowly going through my library and should be done in a few months. I should have an extra copy somewhere, but it will probably be a while. I've already decided to sell off all VAX, massbus, and most qbus. Do you want a hard copy when I find it? Paul On Sat, Jun 3, 2017 at 7:56 PM, Marc

RK11-D print set

Although I can find the RK11D users manual on the web there doesn't appear to be print set (schematics) out there. Does this exist somewhere under a non-obvious name? Thanks, Marc Howard

360KB and 1.2MB floppy drives

https://www.linkedin.com/in/tecserve/ This guy had hundreds of them, will ship internationally. He is in Uruguay. Cindy Croxton

Re: Anybody has Control Data (CDC) disk packs for 841 and 844 disk drives to spare with?

I am looking for someone who can read an ICL EDS8 disk pack. I am told that it would have been used in an ICT type 2802/2 drive on an ICL 1905E, but that it is also compatible with an IBM 2311 disk drive and that it uses a mechanical assembly based on a CDC 9450. Given the mention of the 2311