Re: Xerox 820

> > > > I have an 820-II but I also have a lot of 820 1/4 un software diskettes > > (but no 5 1/4" drive. I can image and upload my disks if you'd like. I > > have about 50 or so disks, various software. > > > > My 820-11 was new-old -stock when I got it whatever years ago, still have > > the

Re: TRS80 Model 4P CRT contrast fail

> On 23 Nov 2017, at 20:43, Chuck Guzis via cctalk > wrote: > > On 11/23/2017 11:34 AM, Adrian Graham via cctalk wrote: > >> None of the pots on the video board deal with contrast so I’ve got it out on >> the bench to remove and test the capacitors. What else can I

Re: Xerox 820

On Nov 22, 2017 8:17 PM, "Pete Lancashire via cctech" wrote: > > Wow that brings back some memories. There was about 10 of us who got > together and I can't remember how or who got 10 of them. I think mine is > still in storage somewhere. > > > > On Wed, Nov 22, 2017 at

Re: MXV21 with RX02

Never mind. The manual is not particularly clear. It is for a Shugart drive, which can read/write to RX02 floppies, but does not work with an RX02 drive. Ah well! Thanks, Aaron. Aaron Jackson writes: > Hi all, > > I was given an MTI MXV21 controller which is apparently compatible with > the

Re: TRS80 Model 4P CRT contrast fail

> On 23 Nov 2017, at 21:18, Brent Hilpert via cctalk > wrote: > > On 2017-Nov-23, at 11:34 AM, Adrian Graham via cctalk wrote: >> Hi folks, >> >> A random facebook post made me dig out my model 4P which has never worked as >> long as I’ve owned it, it’s always just sat

Re: DS12887 pcb substitute with battery

Hi Alan > What are you talking about? > > https://www.digikey.com/product-detail/en/maxim-integrated/DS12885/DS12885-ND/1196867 Thank you for your input, however a DS12885 is not a DS1285 (and neither a DS12887/A is a DS1287/A), and I did explain why I only consider an exact replacement

MXV21 with RX02

Hi all, I was given an MTI MXV21 controller which is apparently compatible with the RX02 drive. The card has a 50 pin header, but the RX02 drive has a 40 pin ribbon cable. Does anyone know what am I missing here? I don't see anything about this in the manual:

Re: Xerox 820

Wow that brings back some memories. There was about 10 of us who got together and I can't remember how or who got 10 of them. I think mine is still in storage somewhere. On Wed, Nov 22, 2017 at 4:54 PM, allison via cctech wrote: > On 11/21/2017 10:51 AM, Bill Gunshannon

Re: Xerox 820

On 11/21/2017 10:51 AM, Bill Gunshannon via cctech wrote: > Any interest in a Xerox 820 board that never had it's construction completed? > > It's amazing the stuff I find digging through my boxes of junk. > > bill Bill, I'm likely one of the few around that can populate it with period parts.

Re: Xerox 820

On 11/22/2017 08:51 PM, william degnan via cctech wrote: > On Nov 22, 2017 8:17 PM, "Pete Lancashire via cctech" > wrote: >> Wow that brings back some memories. There was about 10 of us who got >> together and I can't remember how or who got 10 of them. I think mine is >>

Re: PC diskette drives in a HP 9122C was WTB: HP-85 16k RAM Module and HPIB Floppy Drive

On 11/23/2017 07:02 PM, Paul Berger via cctalk wrote: > I have managed to get 2 PC type drives working in a 9122C they are two > different versions of the YE Data YD-702D.  The important thing is the > drive needs to provide a ready signal, diskette change and density.  > Most drives provide the

PC diskette drives in a HP 9122C was WTB: HP-85 16k RAM Module and HPIB Floppy Drive

I have managed to get 2 PC type drives working in a 9122C they are two different versions of the YE Data YD-702D.  The important thing is the drive needs to provide a ready signal, diskette change and density.  Most drives provide the last two but do not have a ready signal.  You also need to

Re: early IBM S360 docs

On 11/23/2017 4:28 PM, steve shumaker via cctalk wrote: Free for shipping from 95006, a stack of original IBM documents for the S/360 including Field Engineering Manuals and Systems Reference Library documents plus others - dumpster rescues from an engineer's estate.  All have been hi res

Re: Looking for AT 3B2 Networking diskettes

* On Tue, Nov 21, 2017 at 08:03:30PM -0800, Seth Morabito via cctalk wrote: > Hi folks, > > I can't seem to find the "Networking Support Utilities" package for > the 3B2 anywhere online. Unfortunately, this package is required in > order to install TCP/IP (which I DO

early IBM S360 docs

Free for shipping from 95006, a stack of original IBM documents for the S/360 including Field Engineering Manuals and Systems Reference Library documents plus others - dumpster rescues from an engineer's estate.  All have been hi res scanned. Titles from the IBM Systems Reference Library as

Re: DR-DOS

On 23 November 2017 at 21:31, Christian Groessler via cctalk wrote: > > When your are talking about editors and DOS, the only answer is BRIEF! Now that I _have_ heard of, yes. Never used it, though. Never really was a programmer. The tiny bit of coding I did on the PC was

Re: DR-DOS

On 23 November 2017 at 21:28, Noel Chiappa via cctalk wrote: > > This must be a uSloth TCP/IP you are speaking of. There's the one from FTP > software which was based on the one done at MIT which was freeware. That one > was definitely DOS-era - it ran on DOS 1 and DOS 2. I

Re: Editor [was: Re: DR-DOS]

On 23 November 2017 at 21:01, Tomasz Rola wrote: > On Thu, Nov 23, 2017 at 06:53:18PM +0100, Liam Proven via cctalk wrote: > [...] >> But only someone who thinks that Emacs or Vi are usable editors could >> think this was an appealing virtualisation solution. > > Oh my, I know you

Re: TRS80 Model 4P CRT contrast fail

On 2017-Nov-23, at 11:34 AM, Adrian Graham via cctalk wrote: > Hi folks, > > A random facebook post made me dig out my model 4P which has never worked as > long as I’ve owned it, it’s always just sat on a shelf looking cute. > > Good old ASTEC PSU problem so I fixed that, reseated all the

Re: TRS80 Model 4P CRT contrast fail

On 11/23/2017 11:34 AM, Adrian Graham via cctalk wrote: > None of the pots on the video board deal with contrast so I’ve got it out on > the bench to remove and test the capacitors. What else can I look at at the > same time? Someone else has already mentioned the transistors Q101, Q102 and >

Re: DR-DOS

On 11/23/17 21:28, Noel Chiappa via cctalk wrote: > From: Liam Proven > TCP/IP basically postdates the MS-DOS era, in PC terms, and it's Bloaty > McBloatface. This must be a uSloth TCP/IP you are speaking of. There's the one from FTP software which was based on the one done at

Re: Slightly OT: Computer internals book recommendations

> From: Eric Christopherson > I have an inside scoop that a certain library is about to get rid of > their 2003 printing (which is apparently 1st edition) ABE seems to have copies for around US$10:

Re: DR-DOS

> From: Liam Proven > TCP/IP basically postdates the MS-DOS era, in PC terms, and it's Bloaty > McBloatface. This must be a uSloth TCP/IP you are speaking of. There's the one from FTP software which was based on the one done at MIT which was freeware. That one was definitely DOS-era

Editor [was: Re: DR-DOS]

On Thu, Nov 23, 2017 at 06:53:18PM +0100, Liam Proven via cctalk wrote: [...] > But only someone who thinks that Emacs or Vi are usable editors could > think this was an appealing virtualisation solution. Oh my, I know you are not offensive and I think flame over editors is really stupid thing to

TRS80 Model 4P CRT contrast fail

Hi folks, A random facebook post made me dig out my model 4P which has never worked as long as I’ve owned it, it’s always just sat on a shelf looking cute. Good old ASTEC PSU problem so I fixed that, reseated all the thankfully socketed chips and it burst into life. Sort of. I know it’s

Re: DR-DOS

On 22 November 2017 at 11:25, Peter Corlett via cctalk wrote: > On Tue, Nov 21, 2017 at 08:15:00PM +0100, Liam Proven via cctalk wrote: > [...] >> A file-based virus could escape _if_ the VM had access to the host >> filesystem. But mine don't, partly because it's

Re: DEC indicator panel 'light shield'

On 11/23/2017 06:39 AM, Noel Chiappa via cctalk wrote: So now I'm trying to make up a prototype 'light shield' (the flat board with all the holes drilled in it); the parts list in the drawings (RF11 engineering drawings, pg. 187) just calls it a 'Benelex', which is the name for the material it

Xerox 820

The 820 is spoken for. Let's see what I find next. bill

DEC indicator panel 'light shield'

So Dave Bridgham and I are continuing to make (slow) progress with the QSIC and indicator panel project; the latest step was to find some LEDs which look much more like the original lights: http://pdp10.froghouse.org/qsic/new-led.jpg So now I'm trying to make up a prototype 'light shield' (the