[Info-vax] Reading Gordon Bell's VAX strategy document

John Dallman jgd at cix.co.uk
Mon Sep 25 02:48:00 EDT 2023


In article <6c594b48-68c2-4400-9f79-9fc15635ceefn at googlegroups.com>,
gah4 at u.washington.edu (gah4) wrote:

> The most important thing you want, when you start reading an 
> instruction, is to know where the next one is.  For IBM S/360, 
> you always know from the first byte where the next instruction 
> is.  Even with the above change, it isn't easy for VAX, but 
> would be close. 

I wonder if that was deliberate for S/360? The original paper on the
architecture does not mention anything about the encoding; a really old
copy of the "Principles of Operation" would be interesting. 

John 



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