360/50 microcode listing

jwsmobile jws at jwsss.com
Thu May 7 22:20:10 CDT 2015

On 5/7/2015 6:57 PM, Jon Elson wrote:
> Lots of 360's were owned in the later days.  All the ones I knew of, 
> with the possible exception of Washington Universities' first 360/50
The UMR 360/50 was one of the first owned 360s.  They were given a 
360/40 because IBM could not deliver the 50 on schedule.  I don't know 
how that was handled.

The 50 at UMR was also odd because it was a 512K main memory machine, 
and 1mb of LCS, giving a non power of 2 memory size. Supposedly lead to 
some bug fixes.

Ran HASP and MVT 21, as well as CPS


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