Re: Help identifying UNIBUS PDP-11 CPU upgrade

> Right, that's what's confusing me. I can't work out what you could possibly > be cabling to, on the new CPU board! > > Those two connectors on the M7859 are used only with the 11/34, not the > 11/04 > (the cable from the M7859 to the programmer's front panel must be there, > with > both); they

Re: Help identifying UNIBUS PDP-11 CPU upgrade

> On Jul 1, 2017, at 1:08 AM, Mattis Lind via cctalk > wrote: > >> Right, that's what's confusing me. I can't work out what you could possibly >> be cabling to, on the new CPU board! >> >> Those two connectors on the M7859 are used only with the 11/34, not the >> 11/04

Re: Help identifying UNIBUS PDP-11 CPU upgrade

> From: Jerry Weiss > So it would appear the upgrade board makes provisions for both > situations. I'm not sure that the two situations that the upgrade board supports are in fact different, from its point of view. (Assuming that the two situations you refer to are the two different

Re: Help identifying UNIBUS PDP-11 CPU upgrade

> From: Noel Chiappa > (One cable carries uclock, the other uPC data.) Minor goof there; the low bits of the uPC are in one cable, along with the "Manual Clock Enable" and "Manual Clock" signals; the other cable carries the high bit/bits (depending on whether it's a KD11-E or KD11-EA) of

Model M case screws

Can anyone tell me the size of the Model M keyboard case screws? The one I use on my main 'modern' PC could use a good clean, but the case recesses are a little too narrow for a typical socket to fit - I either need a nut driver, or to shave a little material off the outside of a socket to

Looking for a 22 bit Qbus chassis...

Looking for a Qbus chassis to put an 11/73 system back together with. Anyone have anything they're willing to part with for a reasonable price? I'd prefer something in the southeast US to minimize shipping cost... -- Mike Niswonger

Re: Help identifying UNIBUS PDP-11 CPU upgrade

On 7/1/2017 8:59 AM, Noel Chiappa via cctalk wrote: > From: Jerry Weiss > So it would appear the upgrade board makes provisions for both > situations. I'm not sure that the two situations that the upgrade board supports are in fact different, from its point of view. (Assuming

Re: Help identifying UNIBUS PDP-11 CPU upgrade

> From: Josh Dersch > There's a 20-pin header on the CPU upgrade board which connects to the > front panel. ... the programmer's panel loses most of its functionality > .. but the HALT/SS and BOOT switches are functional with the cable > connected. ... With the 20-pin cable

Re: Help identifying UNIBUS PDP-11 CPU upgrade

> On Jul 1, 2017, at 10:59 AM, Noel Chiappa via cctalk > wrote: > >> From: Jerry Weiss > >> So it would appear the upgrade board makes provisions for both >> situations. > > I'm not sure that the two situations that the upgrade board supports are in > fact different,

Re: Model M case screws

Jules Richardson via cctalk writes: > Google suggests that they might be 7/32", but I'm not sure; that's > less of a common size (vs. 3/16" or 1/4", say) - I'm not even sure I > could find a driver like that around here. Yes, they're 7/32", but in a narrow hole that means

Re: Model M case screws

On Sat, Jul 1, 2017 at 8:12 PM, Adam Sampson via cctalk wrote: > Jules Richardson via cctalk writes: > >> Google suggests that they might be 7/32", but I'm not sure; that's >> less of a common size (vs. 3/16" or 1/4", say) - I'm not even sure I >>

Re: Model M case screws

On 07/01/2017 09:28 AM, Jules Richardson via cctalk wrote: > Google suggests that they might be 7/32", but I'm not sure; that's less > of a common size (vs. 3/16" or 1/4", say) - I'm not even sure I could > find a driver like that around here. That's exactly what I use--get a decent one; some of

Re: Model M case screws

On Sun, Jul 2, 2017 at 12:09 AM, Jules Richardson via cctalk wrote: > Anyway, I picked up a cheap 7/32" deep socket from Menards ($3 or so) - and > as it happens, it Just Works without modification. It's not marketed as > thin-walled; I expect they just made it cheap by

Re: Model M case screws

On 07/01/2017 02:12 PM, Adam Sampson via cctalk wrote: Jules Richardson via cctalk writes: Google suggests that they might be 7/32", but I'm not sure; that's less of a common size (vs. 3/16" or 1/4", say) - I'm not even sure I could find a driver like that around here.

Re: Model M case screws

On 07/01/2017 01:23 PM, Jules Richardson via cctalk wrote: > It does look like I can get a 7/32" socket for a couple of bucks, though > - so maybe I'll go that route for now and just shave it down a little > with the bench grinder. It can live on the shelf with the homebrew Mac > case dismantling