Re: RCA COSMAC MS2000 MicroDisk Development System

[Joshua Rice via cctalk]

From: "Bill Degnan via cctech" ...but I bet yours 
is more like 1976-77. What is the CPU type 1802 or something else?


It's definitely an 1802 family CPU, not sure of exact model, but i'll 
find that out later when i tear it down (and document/post it here). 
However, it's much newer than '77. The "MicroDisk" part of the name 
refers to the two early Sony 3.5" drives mounted in the front of the 
machine, so it dates from about 1984. It uses RCA Microboard cards, so 
fundamentally it's very similar.


Here's a picture i took of it shortly after unboxing: 
https://imgur.com/gallery/bHYFoBV 


Cheers,

Josh Rice

Re: RCA COSMAC MS2000 MicroDisk Development System

[Joshua Rice via cctalk]

-- Original Message --
From: "geneb" https://i.imgur.com/Q96sRhE.jpg 
Nice find!

g.


No, it looks like this: https://imgur.com/gallery/bHYFoBV


-- Original Message --
From: "David Schultz" 
You didn't mention my web page: 
http://davesrocketworks.com/electronics/1802/microdos/index.html 
 
which might have some additional information useful to you.



Thank you, i'm sure that will come in handy! Seems to be a rather poorly 
documented (and rather rare) system, so any information is good 
information!



Cheers



Josh Rice

Re: RCA COSMAC MS2000 MicroDisk Development System

[geneb via cctalk]

On Thu, 7 Apr 2022, Bill Degnan wrote:


This one is from 1975 just before the Altair 8800
https://www.vintagecomputer.net/rca/COSMAC/EDN_COSMAC_Microkit.jpg


Ah, ok.  Thanks for the pic!


...but I bet yours is more like 1976-77.  What is the CPU type 1802 or
something else?

It's an 1802.  It's got some serial port boards, RAM, a disk controller 
and the CPU board in there.  I've also got the dual 8" drive and terminal 
that go with it.


g.

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Re: Bob Lucky

[Peter Schow via cctalk]

On Thu, Apr 7, 2022 at 9:41 AM Jim Brain via cctalk
 wrote:
>
> I don't remember seeing this here, and not sure how many of you read his
> articles, but:
>
> https://spectrum.ieee.org/bob-lucky-obituary

Thanks for letting us know.  I got to meet Robert Lucky when he was at
Bellcore in the mid-1990s and visited us at U S WEST Advanced
Technologies in Boulder, CO.  He said Bellcore spent years designing a
public internet-like system at scale but their #1 concern was where
content was going to come from.  They secured preliminary deals with
some content-providers, which at the time were the newspapers and wire
services, but the whole system was scrapped when the internet took
off, as we know it today.  By far their biggest surprise was the
volume of content that originated from end users (e.g. web sites);
they didn't see that coming at all.

Re: Bob Lucky

[Chris Zach via cctalk]

Thanks for letting us know.  I got to meet Robert Lucky when he was at
Bellcore in the mid-1990s and visited us at U S WEST Advanced
Technologies in Boulder, CO.  He said Bellcore spent years designing a
public internet-like system at scale but their #1 concern was where
content was going to come from.  They secured preliminary deals with
some content-providers, which at the time were the newspapers and wire
services, but the whole system was scrapped when the internet took
off, as we know it today.  By far their biggest surprise was the
volume of content that originated from end users (e.g. web sites);
they didn't see that coming at all.


That sounds like AT&T connect! I remember working on it in the late 
80's, it was based on IPX/SPX, X400 mail and an X500 directory 
structure. In fact I think that was the identity system that Novell used 
for the later NDS directory system to replace the trusty rusty Bindery.


It was all supposed to run on ISDN lines to consumers and would be the 
ultimate market/info place all lovingly run and curated by AT&T. Then of 
course those meddling kids at FTP released PKTDRV..


Anyone else remember this?

CZ

Quantum ATL-7100 DLT Changer in SLC

[Tim Riker via cctalk]

I have a Quantum ATL-7100 100 tape DLT changer. Last I checked it worked 
fine. It's almost as big as a fridge. I have around 100 tapes for it, 
not all the same density. It uses fast/wide scsi-3 differential for the 
drives. I think I have 2 working drives in the cabinet plus one or 2 
separate external drives.


I think my drives are DLT-7000 or similar which gives a total capacity 
of 7TB.


Upgraded with SDLT 220 drives and tapes the chassis would have a 
capacity of 22TB.


Anyone interested in picking this up in South Jordan Utah? (outside Salt 
Lake City).


The only issues I know about it, is the tape loading pivoting door is 
not quite rotating correctly, and I replaced one of the AT power 
supplies with a unit that is NOT autoswitching. So if you want to run 
the unit on 220V instead of 110, you will need to change the chassis and 
the replaced internal power supply.


It's really fun to load it up with tapes, then tell it to auto-shuffle 
them. I have the door hot wired so you can open the door while it's 
operating. Easy to restore the switch if you don't want to.


Photos here:

https://rikers.org/gallery/hardware-atl7100

Interested, please email directly, I don't check the list very often.

Tim