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 on: February 18, 2019, 02:47:50 pm 
Started by lapham - Last post by lapham
WOW I never heard of a disk on a 500. I left Chicago and all service of the 500's in 1976. Went to Cambridge OH to be a specialist on the Retail 725 systems. I too do not know of any command that would run a disk, or think of any other command that could be modified to run one. Could the disk be an aftermarket unit? Europe only thing? I'll pass this on to another 500 service man from Chicago that worked on them longer than I.

 on: February 18, 2019, 11:17:51 am 
Started by lapham - Last post by heikobuss
Hello Richard,

in the "last days" of the NCR 500 the 500-users could buy a disk to connect to the system. This was a very seldom peripheral, and I got now  a photo of the disk.

 I'm trying to get more information about the disk and how to operate this unit and how it was organized (Table of contents?). Yesterday I looked at the 500 machine command table and found no command to write to and to read from the disk.

As a former 500 field engineer - do you know anything about this disk?


 on: November 02, 2018, 12:13:06 am 
Started by fred - Last post by uglytuna
Hi JJ,

I remember talking to you several times in R.B.  I think the first time was when I ran a DynaProbe on a large Century 200 site running a B2 partition under B3 at the United Bank in Denver in the early '70s.  My analysis showed that a large portion of the processor time was spent in the B2 OCD.  You became involved and made significant efficiency improvements in the OCD based on that analysis as I recall.  I also spent quite a bit of time working with Berry Gilmore's Systems Services team in Rancho Bernardo.

Herb Fish

 on: November 01, 2018, 09:12:11 pm 
Started by heikobuss - Last post by uglytuna
I enjoyed seeing the photo of the Century 300 console.  It brought back many memories.  I worked in Systems Services out of the 741 building in Dayton and provided field support for the B4 Operating System.

 on: August 26, 2018, 02:50:20 pm 
Started by fred - Last post by heikobuss

Hello JJW,

i can't remember any possibility on the Century under B1/B2/B3 to have index-sequential access to data files using NEAT/3. How could that work? Can you explain?
When using "Cobol74" there was a in-built index-sequential access.
As written, on VRX with NEAT/VS you can use "CAM"-Files.

Hello JimT,

yes, the CRAM was available on the Century. I remember during the C-200 education at the ITEC London (North Circular Road) in 1972 glancing stunned at this strange peripheral. I've never seen a CRAM on a Century in the field -  thanks God!


 on: July 31, 2018, 08:46:23 am 
Started by heikobuss - Last post by Aleksandrs Guba
Attached images provided by Rich Lapham!

 on: July 30, 2018, 03:12:46 pm 
Started by heikobuss - Last post by Aleksandrs Guba
Hi Lapham,

The mailbox to send any related photos:

Aleksandrs Guba

P.S. Attached images provided by Rich Lapham!

 on: July 28, 2018, 07:19:20 am 
Started by heikobuss - Last post by wally
Here you'll find more on the 315 rod memory.

and here is a PDF on it

Neither did I find anything on the 16k rod memory for the Century.

Regards Wally.

 on: July 27, 2018, 01:38:06 pm 
Started by heikobuss - Last post by lapham
The CRAM units were on the 315's they also had.  There were rod memory cards, but I don't have a picture of one. I have many pictures of the data center (10)but haven't figured out how to post them on here. If you provide me with an email  (message me) I could sent them to you.

 on: July 26, 2018, 03:06:31 pm 
Started by 8178 - Last post by heikobuss

the Link to the 605 nostalgia website seems to be dead.

This Link looks like the new address:


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