test-drb February 2013

test-drb@ccmp.vtda.org

185 participants
407 discussions

what chip is that? IBM Displaywriter 6360 Diskette Unit

by rampaginggreenhulk＠yahoo.com

>Hav eyou treid tracing out any of the conenctions? At least power and >ground. Maybe data buses, clock, reset, etc. Often knowing some of those >will narrow the possibilties right down. > >-tony Better pictures would help, including the back of the board. What about monitoring the pins with a scope or logic probe even? Probably unnecessary as long as you can get at it's backside.

11 years, 5 months

need DEC Rainbow keyboard for spare parts

by rampaginggreenhulk＠yahoo.com

>I don;t rmemebr this. When did you send it, what was it about? > >-tony NP. I"ll dig it out and resend it. It had something of a demanding tone, so I just had to wonder...

11 years, 5 months

what chip is that? IBM Displaywriter 6360 Diskette Unit

by rampaginggreenhulk＠yahoo.com

>I believe that OTP 8748s exist also. No window. > >--Chuck that's what I was thinking. I seen a few. and I was going to wait to ask this question after examining hopefully some that I have with windows, can't recall seeing one in my stash though, weather the "code" is visible since it has 1.

11 years, 5 months

PANASONIC HHC RL-H1800 TV DISPLAY ADAPTOR

by n8uhn＠yahoo.com

WOW! someone spent alot of time reverse engineering the hhc and i thank you. i downloaded the schematics. so far i have a lead on a 1400 hhc which should be of use for the programmer or just a display board swap. i have a large bid on ebay for a ge programmer that has an 1800 with a working display and some spare ge modules. im still wondering if the tv display adaptor will work with the ge software but, it seems one cannot be located. anyone know if the tv adaptor has a rom in it? if not, it could be built of some perfboard if the chips are still available. i think i should be good with a working display - i was concerned with display rot but, it seems mine is the only one i've seen that the display went bad in 1 area. others pic's i've seen online all have good displays on them. Bill > I didn't find your schematics on the web, but I think I have a copy if > someone wants a copy. I'll put it up on my google drive if anyone wants > it and post a link. The link I have just found is : http://signalsprocessed.blogspot.co.uk/2012/08/panasonic-hhc-schematics-by-… -tony

11 years, 5 months

what chip is that? IBM Displaywriter 6360 Diskette Unit

by rampaginggreenhulk＠yahoo.com

so what is the difference between a mask ROM 8048 and an 8748

11 years, 5 months

need DEC Rainbow keyboard for spare parts

by rampaginggreenhulk＠yahoo.com

>What you wnt ot find is an LK201 with a damageed casing or dead encoder >board. YOu cna then use the ocmplete mechanism. The keycaps can be >removed (you ned to twist them slithgly to release the lcokign barbs), >getting one with the wrong layouyt, or the word processor version, or... >is not a problem/ > >-tony Ok gotcha. Now if I can only get you to respond to the offlsit I sent you :)

11 years, 5 months

PDP-11 / Unibus: config info for Motorola Memory Systems MMS1117 MOS board?

by js＠cimmeri.com

Folks, I'm restoring an 11/34A. One of the MOS memory boards it came with is a circa 1979 Motorola model "MMS1117", variation "58 PC" (64KWords / 18 bits / w/parity). Would like to know if anyone out there has configuration information for this seemingly uncommon board? It's a very high quality board and has socketed RAM, so it'd be especially nice to be able to keep using it. It has 5 switch packs (only 2 of which have markings) and at least a dozen jumpers. I've only been able to locate performance specs for it at: http://bitsavers.trailing-edge.com/pdf/motorola/_dataBooks/1979_Motorola_Me… .... which are excerpted here: www.cimmeri.com/js/download/MMS1117.pdf .... and a photo of the board is here: www.cimmeri.com/js/download/MMS1117.jpg ... a photo of the system itself is here: www.cimmeri.com/js/download/11$34-20.jpg Any help, very much appreciated. Thank you, John Singleton

11 years, 5 months

Computing the old way - Is it a thing of the past?

by rampaginggreenhulk＠yahoo.com

>MS-DOS was _not_ complex, it was a rather trivial OS in both complexity and >especially in abilitities. my point was it was complex enough for most people that weren't inclined to delve into their computers >Calling Android "malicious corporate monster" is .. amusing. Especially with >most of the source being available via AOSP. I wonder what you call Apple >iOS (iPhone/iPad) and Windows Phone (whatever Microsoft is calling it these >days) then .. They're all monsters are you kidding me. And source code has nothing to do with the FACT that I don't yet have control over what gets installed in my computer. The average hillbilly who buys an Asus tab will say "Oh thank you great Goozitzu, thank you thank you!" when something gets installed (I don't know how to spell it exactly but that means cooley in Croatian). But even the moderately aware user is going to vow violent gory revenge. Down with Lord Goozitzu! >Also, "hijacked"? So I can't get Linux without Android? *psst* Don't tell >that to my machines (servers, desktops, laptops) all running Linux but >no trace of Android. I never said that. You must be working for Lord Goozitzu. >> I bought a tablet a few weeks >> ago, and one of the initial setup screens declared "I agree to accept >> updates from Google". > >Well, the idea is to least reduce as much as possible the number of devices >with well-known security holes (and other bugs) in the wild. Of course you >are mostly "inconvenienced" by regular updates if you buy an Android Nexus >device. Just buy a device from a manufacturer known not to give rats ass >about security fixes and you won't be bothered. I am bothered. But those updates could be any freaking thing. They don't tell me, they don't ask me. >> Apart from hitting "Learn more", and that's only a >> possibility, don't know, thought of utilizing that after the fact, I had no >> way of opting out. I won't use the thing on the internet until I figure out >> how to disable that. Freedom has a price. > >Or you could install Cyanogenmod and keep it updated yourself Someone already suggested that. And it will void my warranty.

11 years, 5 months

what chip is that? IBM Displaywriter 6360 Diskette Unit

by rampaginggreenhulk＠yahoo.com

Not likely even in my mind, but the NEC APC utilized both a WD FDC and the 765 via an aftermarket add on. I originally wanted to state that the stock unit had both, but I'd really have to check on that. That part # is 8665. Rockwell used the house # 6765 for their 765 clone. Intels wasx 1272 or 1772 oi I just woke up. This much I do know. The APC comes w/8" drives and utilizes a 765. The aftermarket board which allows for 5 1/4" drives has a WD chip. Go figure.

11 years, 5 months

HP 9000/375 Added to the Collection

by jjacocks＠gmail.com

So, I picked up another old workstation, this time an HP 9000/375. I did a basic clean-up and test, and it does seem to work. With a reversed VGA-to-5BNC cable, I can see the diags run on the monitor. It has 8mb of RAM. So, questions, if anyone here has any knowledge about these beasts. 1) I have the HIL-PS/2 adapter (HP calls is the "keyboard adapter module"), but it doesn't plug in to the HIL port on the machine. There is a descending piece of plastic on the right side of the 10P10C connector that blocks it. I know that this adapter was made for the 9000/700 PA-RISC workstations, will it work with the 375, if I remove that tab? 2) What kind of memory do these machines take? I find reference to a 32mb kit (of 2 16mb modules) via HP part number 98229E. The specs say that this machine will take 128mb. So, should I just try to track down 4 kits? Any other advice would be welcome. This is my first 68k workstation, and I'm hoping to have more, in the future. Thanks! - Alex

11 years, 5 months

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test-drb February 2013