Re: was: National Semi... is Apple ][ collectability (if any)

Original message From: "drlegendre ." Date: 2017-01-03 8:03 PM (GMT-08:00) To: "General Discussion: On-Topic and Off-Topic Posts" Subject: Re: was: National Semi... is Apple ][ collectability (if any) "Vent-less case" -

Re: LC8-P (M8365) PDP8 printer interface schematics

If you can't find them, I'll look Sunday. I'll be out of town for a few days. Paul On Tue, Jan 3, 2017 at 7:04 PM, Charles Dickman wrote: > I am looking for schematics or any documentation for the LA180 > interface for the PDP8/e. A scan would be great. I want to see if I >

Re: was: National Semi... is Apple ][ collectability (if any)

"Vent-less case" - LoL!! Add some RAM, maybe a DISC-II card and those things overheated even +with+ the vents.. that's why the Cider fan became popular, among other things. When I was in high school, we'd pop the case tops open, and run them that way. Otherwise, they'd overheat and start

Re: LC8-P (M8365) PDP8 printer interface schematics

On Tue, Jan 3, 2017 at 8:04 PM, Charles Dickman wrote: > I am looking for schematics or any documentation for the LA180 > interface for the PDP8/e. A scan would be great. I want to see if I > can use it to interface to a Centronics interface printer. I don't have the

Re: Fix for 4.3BSD-Quasijarus bootstrap on CMD SCSI controllers

On 1/3/17 12:50 PM, David Brownlee wrote: On 3 January 2017 at 20:11, David Brownlee wrote: On 3 January 2017 at 15:50, Noel Chiappa wrote: > From: Josh Dersch > Thought I'd share this fix with you all just in case someone in the >

Re: LGP-30 Memory Drum Update

On 01/03/2017 01:47 PM, Brian L. Stuart wrote: On Tue, 1/3/17, Cory Heisterkamp wrote: What I’m wondering is if anyone is familiar with the setup/adjustment procedure for getting the heads set correctly. There *might* be a couple of unused tracks I can relocate heads

Re: LGP-30 Memory Drum Update

On 1/3/17 5:42 PM, Al Kossow wrote: > > I think Paul Pierce's machine is at LCM now. They have his LGP-30

Re: LGP-30 Memory Drum Update

On 1/3/17 5:42 PM, Al Kossow wrote: > > Someone should do the same for the surviving G-15s as well. I think Paul > Pierce's machine is at LCM now. > turns out we have it http://www.computerhistory.org/collections/catalog/102728118

Re: LGP-30 Memory Drum Update

On 1/3/17 5:22 PM, Paul Koning wrote: > The key questions for reconstructing such a device is what the modulation > scheme is, and the pulse pattern. There are running LGP-30s. Should be short work with a digital oscillosope to capture the flux changes. Hopefully, someone has done this

Re: LGP-30 Memory Drum Update

> On Jan 3, 2017, at 6:07 PM, Chuck Guzis wrote: > > On 01/03/2017 01:42 PM, Mark Linimon wrote: > >> Very ambitious. IIRC for the G-15 there is/are (one? two?) timing >> track(s) which were written at the factory. Of course whatever that >> machine was, has not survived.

LC8-P (M8365) PDP8 printer interface schematics

I am looking for schematics or any documentation for the LA180 interface for the PDP8/e. A scan would be great. I want to see if I can use it to interface to a Centronics interface printer. -chuck

Re: LGP-30 Memory Drum Update

On Jan 3, 2017, at 2:22 PM, Klemens Krause wrote: > On Tue, 3 Jan 2017, Cory Heisterkamp wrote: >> >> >> What I’m wondering is if anyone is familiar with the setup/adjustment >> procedure for getting the heads set correctly. There *might* be a couple of > We relocated some of the heads on

Re: LGP-30 Memory Drum Update

On 01/03/2017 01:42 PM, Mark Linimon wrote: > Very ambitious. IIRC for the G-15 there is/are (one? two?) timing > track(s) which were written at the factory. Of course whatever that > machine was, has not survived. I remember reading that if you lost > that timing track, your machine was

Re: LGP-30 Memory Drum Update

On 01/03/2017 01:19 PM, Paul Koning wrote: > Metal alloy plating seems common in fixed head disks also, at least > in the ones from DEC I have seen. Making a new drum sounds like a > great class project for an ambitious machine shop student. Modern CNC gear and carbide bits should make this

Re: LGP-30 Memory Drum Update

On Tue, Jan 03, 2017 at 04:19:01PM -0500, Paul Koning wrote: > Making a new drum sounds like a great class project for an ambitious > machine shop student. Very ambitious. IIRC for the G-15 there is/are (one? two?) timing track(s) which were written at the factory. Of course whatever that

Re: LGP-30 Memory Drum Update

> On Jan 3, 2017, at 4:15 PM, Chuck Guzis wrote: > > On 01/03/2017 12:57 PM, Cory Heisterkamp wrote: > >> Once I can make sense of the timing tracks, I think I'll proceed with >> this. Not sure how I feel about using a micro-based solution though. >> Just seems wrong : ) -C

Re: LGP-30 Memory Drum Update

On 01/03/2017 12:57 PM, Cory Heisterkamp wrote: > Once I can make sense of the timing tracks, I think I'll proceed with > this. Not sure how I feel about using a micro-based solution though. > Just seems wrong : ) -C If enough working heads can be found, the drum probably can be

Re: LGP-30 Memory Drum Update

On Tue, Jan 3, 2017 at 1:47 PM, Brian L. Stuart wrote: > On Tue, 1/3/17, Cory Heisterkamp wrote: > > What I’m wondering is if anyone is familiar with the setup/adjustment > > procedure for getting the heads set correctly. There *might* be a

Re: Fix for 4.3BSD-Quasijarus bootstrap on CMD SCSI controllers

On 3 January 2017 at 20:11, David Brownlee wrote: > On 3 January 2017 at 15:50, Noel Chiappa wrote: >> > From: Josh Dersch >> >> > Thought I'd share this fix with you all just in case someone in the >> > future might make use of it. >> >> To

Re: Desparately seeking Cromemco chassis (UK)

- Original Message - From: "James Attfield" To: Sent: Monday, January 02, 2017 4:09 PM Subject: Desparately seeking Cromemco chassis (UK) > Wishing all here a very Happy New Year! > > Along with some other folks in 2017 I have decided I am

Re: LGP-30 Memory Drum Update

On Tue, 3 Jan 2017, Cory Heisterkamp wrote: What I’m wondering is if anyone is familiar with the setup/adjustment procedure for getting the heads set correctly. There *might* be a couple of We relocated some of the heads on our second LGP-30. This is not difficult. We put 3 or 4 layers of 3

Re: Fix for 4.3BSD-Quasijarus bootstrap on CMD SCSI controllers

On 3 January 2017 at 15:50, Noel Chiappa wrote: > > From: Josh Dersch > > > Thought I'd share this fix with you all just in case someone in the > > future might make use of it. > > To help disseminate it, I uploaded the fix to the Computer History wiki: > >

Re: LGP-30 Memory Drum Update

On Tue, 1/3/17, Cory Heisterkamp wrote: > What I’m wondering is if anyone is familiar with the setup/adjustment > procedure for getting the heads set correctly. There *might* be a couple of > unused tracks I can relocate heads to, but my thought is that if half a >

Re: LGP-30 Memory Drum Update

In a message dated 1/3/2017 11:11:54 A.M. US Mountain Standard Time, el...@pico-systems.com writes: On 01/03/2017 10:58 AM, Cory Heisterkamp wrote: > While waiting for the machine, I decided to investigate the stuck drum. > This unit has 71 read/write heads plus what appears to be an

Re: LGP-30 Memory Drum Update

On 01/03/2017 10:58 AM, Cory Heisterkamp wrote: While waiting for the machine, I decided to investigate the stuck drum. This unit has 71 read/write heads plus what appears to be an inductive pickup for the system clock. Upon closer examination I discovered multiple heads in contact with the drum

LGP-30 Memory Drum Update

While waiting for the machine, I decided to investigate the stuck drum. This unit has 71 read/write heads plus what appears to be an inductive pickup for the system clock. Upon closer examination I discovered multiple heads in contact with the drum surface preventing rotation. And in the process

Re: PDP-10 Foonex

thanks. guess I should do that my files in http://bitsavers.org/bits/Foonly/F2 On 1/3/17 4:53 PM, Johnny Eriksson wrote: >> Appeared here: >> >> http://github.com/PDP-10/FOONEX > > The web says: > "Initial checkin whilst I figure out what format the files are" > > I took a quick look and

Re: PDP-10 Foonex

Al Kossow wrote: > Lars Brinkhoff wrote: >> Appeared here: >> http://github.com/PDP-10/FOONEX > wonder if its the code on bitsavers I got from a Symbolics backup tape Yes, it looks much like the contents of your F2/files directory, minus the microcode.

Re: PDP-10 Foonex

How far did Foonex diverge from BB TENEX? If not TOO far, it might be nice to have them both as branches in one repository, for comparison.

Re: IA-1010 Z-80 board difficulties!

Hi, On Mon, Jan 02, 2017 at 10:32:28PM -0800, Richard Pope wrote: >Walter, >. . . . I appreciate all of this information. I have a revision 2.0 >board and my info shows U8 as a 96S02 multivibrator chip. I have tried >to find a replacement for this and I have not been successful.

RE: was: National Semi... is Apple ][ collectability (if any)

>On 1/2/2017 11:26 PM, Brad H wrote: > I brought the RFI thing up with him. No response. There is a legit Rev 1 > there too asking $3500. I don't find Apple IIs below Rev 0 that interesting > anymore, personally. I think even the legit guy would struggle to get much > above $1500. >The

Re: PDP-10 Foonex

> Appeared here: > > http://github.com/PDP-10/FOONEX The web says: "Initial checkin whilst I figure out what format the files are" I took a quick look and guessed a little: #include typedef unsigned long long w36; void pchar(char c) { c &= 0177; if ((c < ' ') || (c ==

Re: Fix for 4.3BSD-Quasijarus bootstrap on CMD SCSI controllers

> From: Josh Dersch > Thought I'd share this fix with you all just in case someone in the > future might make use of it. To help disseminate it, I uploaded the fix to the Computer History wiki: http://gunkies.org/wiki/CDU-710/M_disk_controller > From: Lars Brinkhoff >

Desparately seeking Cromemco chassis (UK)

Wishing all here a very Happy New Year! Along with some other folks in 2017 I have decided I am going to ripple through all of my vintage systems and warm their beautiful and friendly caches. I won't have a problem with my BBC Micro, Atari 1040ST, Amiga 500's, 2000's, 3000 and 4000 and the

ISO Compugraphic MCS-10 keyboard

Pics of what I'm trying to find at http://www.retrocomputing.net/parts/compugraphic/mcs_keyb/ Bought one w/o kb or monitor and managed to locate a few floppies for it. CP/M 86 was available from CG, but I don't think there's much chance of ever finding that. Even just a dump of the

Re: Hollerith cars available (ebay warning).

The rounded corners may be more of an issue since unmodified Documation card readers can't read them. On 1/3/17 1:31 AM, jim stephens wrote: > I don't personally care that there is a lot of crap printed on them, rather > than the column indexes. The machines don't > read that, and the top

Re: PDP-10 Foonex

wonder if its the code on bitsavers I got from a Symbolics backup tape On 1/2/17 10:33 PM, Lars Brinkhoff wrote: > Appeared here: > > http://github.com/PDP-10/FOONEX >

Re: Fix for 4.3BSD-Quasijarus bootstrap on CMD SCSI controllers

Josh Dersch wrote: > Thought I'd share this fix with you all just in case someone in the > future might make use of it. There's no central repository for fixes like these?

Re: Transporting an LGP-30

On Mon, 2 Jan 2017, Jon Elson wrote: (For reference, we were talking about my experiences with a Bendix G-15, not an LGP-30.) So, I think the G-15 drum had a brass sleeve that might have How should I know? Change the subject then! Christian

Hollerith cars available (ebay warning).

Sorry for posting the National machine w/o an Ebay warning. Anyway anyone that has a home keypunch will possibly be interested in this guy. I have ordered up a pile, as I doubt they will show up this cheap unless someone takes it on themselves to manufacture them as the earlier discussions

Re: was: National Semi... is Apple ][ collectability (if any)

In a message dated 1/3/2017 1:09:50 A.M. US Mountain Standard Time, jwsm...@jwsss.com writes: On 1/2/2017 11:26 PM, Brad H wrote: > I brought the RFI thing up with him. No response. There is a legit Rev 1 there too asking $3500. I don't find Apple IIs below Rev 0 that interesting

Re: was: National Semi... is Apple ][ collectability (if any)

On 1/3/17 12:09 AM, jim stephens wrote: On 1/2/2017 11:26 PM, Brad H wrote: I brought the RFI thing up with him. No response. There is a legit Rev 1 there too asking $3500. I don't find Apple IIs below Rev 0 that interesting anymore, personally. I think even the legit guy would

Re: was: National Semi... is Apple ][ collectability (if any)

On 1/2/2017 11:26 PM, Brad H wrote: I brought the RFI thing up with him. No response. There is a legit Rev 1 there too asking $3500. I don't find Apple IIs below Rev 0 that interesting anymore, personally. I think even the legit guy would struggle to get much above $1500. The