Re: cleaning up edge connectors
DeOxit works pretty good for cleaning up connectors that still have serviceable surface finishes, but yeah, temporary at best if the surface finish is gone. We use it to clean up all sorts of connectors that are just regular dirty, pots, etc. Thanks, Jonathan --- Original Message --- On Friday, April 29th, 2022 at 16:35, Bill Gunshannon via cctalk wrote: > > > On 4/28/22 18:02, Mike Katz wrote: > > > I use DeOxit Gold to clean my PDP-8 boards edge conectors: > > > I have DeOxit but I saw that as a very short term solution (no > pun intended :-)). I think I will try my idea of using solder > with a little silver in it if I can find some suitable. > > bill
Re: Looking for old OAK keyboard/control switch...
Link to image of switch: https://www.flippers.com/images/Misc/OAK_Pushbutton_Switch-1973.jpg Thanks, John :-#)# On 2022/04/29 2:14 p.m., John Robertson via cctalk wrote: I've been hunting for a few years for these switches and was thinking that perhaps folks here may have seen them or even have some they wish to part with...I've hit all the surplus sites, and poured over old copies of old Radio Master Parts Catalogue/Encyclopedias - have 7 of those, from 1971 going back to 1942 (have visited bitsavers too of course)... This has a total length of 1-5/8", the actuator bar is 5/8 x 3/16 x ~1/32", the body is 1/2 x 1/2 x 7/8". This uses spring steel snap-on clips to secure it in the rectangular hole in the control/keyboard panel. They have four pins, two are NC and two are NO, no interconnection between the pins. See attached 15kb photo. Hope this doesn't break the system! Looking for as many as anyone can spare! These are for restoration work, so the more the merrier. Thanks! John :-#)# -- John's Jukes Ltd. 7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3 Call (604)872-5757 (Pinballs, Jukes, Video Games) flippers.com "Old pinballers never die, they just flip out"
Looking for old OAK keyboard/control switch...
I've been hunting for a few years for these switches and was thinking that perhaps folks here may have seen them or even have some they wish to part with...I've hit all the surplus sites, and poured over old copies of old Radio Master Parts Catalogue/Encyclopedias - have 7 of those, from 1971 going back to 1942 (have visited bitsavers too of course)... This has a total length of 1-5/8", the actuator bar is 5/8 x 3/16 x ~1/32", the body is 1/2 x 1/2 x 7/8". This uses spring steel snap-on clips to secure it in the rectangular hole in the control/keyboard panel. They have four pins, two are NC and two are NO, no interconnection between the pins. See attached 15kb photo. Hope this doesn't break the system! Looking for as many as anyone can spare! These are for restoration work, so the more the merrier. Thanks! John :-#)# -- John's Jukes Ltd. 7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3 Call (604)872-5757 (Pinballs, Jukes, Video Games) flippers.com "Old pinballers never die, they just flip out"
Re: cleaning up edge connectors
On 4/28/22 18:02, Mike Katz wrote: I use DeOxit Gold to clean my PDP-8 boards edge conectors: I have DeOxit but I saw that as a very short term solution (no pun intended :-)). I think I will try my idea of using solder with a little silver in it if I can find some suitable. bill
Re: DEC OSF/1 for i386?
I knew folks who worked on A/UX at Apple, but I don't have any details about it's internals. TTFN - Guy On 4/29/22 11:40, Cameron Kaiser via cctalk wrote: but I know at IBM we had 2 principle "ports" that we maintained (PPC Did this have anything to do with Apple's alleged "A/UX for PowerPC" which was supposedly OSF/1 based? -- TTFN - Guy
Re: DEC OSF/1 for i386?
> but I know at IBM we had 2 principle "ports" that we maintained (PPC Did this have anything to do with Apple's alleged "A/UX for PowerPC" which was supposedly OSF/1 based? -- personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckai...@floodgap.com -- Wouldn't your life be simpler if you were reading this on a Commodore 64? --
Re: cleaning up edge connectors
> Copper? Mine all look like solder. Probably copper underneath but > the exposed part is lead which probably explains why they seem to > corrode so easily. Ah, yeah, if they're finished in matte tin or HASL, I just reflow leaded solder on. A little bit of Superior #30 flux will make it flow nice and flat. If you don't have liquid flux suitable to it, put solder on and remove excess with solder wick. Thanks, Jonathan
Re: DEC OSF/1 for i386?
I was at IBM when OSF (and subsequently OSF/1) was created and had a lot of discussions with OSF at that time. At IBM I was working on the IBM Microkernel. OSF/1 also used Mach (but a different source base) as the kernel. The big effort was to keep the APIs and documentation "similar". We had huge arguments about RPC and I think that's the area that we didn't converge which I think made the whole thing pointless since the IPC/RPC was one of the main points of Mach. :-/ I don't know what DEC did in terms of their OSF/1 product, but I know at IBM we had 2 principle "ports" that we maintained (PPC & x86) as well as a few others (MIPS, StrongARM, 68K being the other ones as I recall) that we "kept alive". TTFN - Guy On 4/29/22 07:45, Dennis Grevenstein via cctech wrote: Hi, just recently I found this archive: https://vetusware.com/download/OSF1%20Source%20Code%201.10/?id=11574 this is a package of source code for DEC OSF/1 V 1.0. I knew that this is supposed to run on DECstations (with MIPS), in fact I have a DS3100 running it myself. However, one thing really puzzled me: This archive apparently includes support for i386. There is even a kernel build log from 1990. Now that was news to me. I never realized that this worked on i386. Can anybody here tell any stories about this? regards, Dennis -- TTFN - Guy
DEC OSF/1 for i386?
Hi, just recently I found this archive: https://vetusware.com/download/OSF1%20Source%20Code%201.10/?id=11574 this is a package of source code for DEC OSF/1 V 1.0. I knew that this is supposed to run on DECstations (with MIPS), in fact I have a DS3100 running it myself. However, one thing really puzzled me: This archive apparently includes support for i386. There is even a kernel build log from 1990. Now that was news to me. I never realized that this worked on i386. Can anybody here tell any stories about this? regards, Dennis
Re: RT11 Freeware Collection
> On Apr 28, 2022, at 11:05 PM, s shumaker via cctalk > wrote: > > duh... Didn't look there. was googling all over w/o success. It didn't > show the bitsavers link. Thanks! Rumor has it that Google has a bias against http (not https) sites, even though for applications like this http is quite reasonable. paul
Re: cleaning up edge connectors
On 4/28/22 18:33, Jonathan Chapman wrote: If there's bad/deep corrosion, I hit it with the ink eraser (I have a bunch of Eberhard-Faber ones that look like a wooden pencil, you sharpen them like a pencil too). If that won't touch it, I use the stainless steel toothbrush. Corey Cohen has some plating solution that you dip a pen in, intended for jewelry repair. The plating does not hold up well over copper, you need a layer of nickel over the copper first. So, if you're removing down to the copper, you'll have to find a way to put nickel on first. Copper? Mine all look like solder. Probably copper underneath but the exposed part is lead which probably explains why they seem to corrode so easily. bill
