Re: [MI400] A Blast from the Past

[Douglas Handy <dhandy1@xxxxxxxxxxxxx>]

Keith,

>Are there any significant diferences in the instruction set of the S/3 and
>the MSP used in the S/34 and S/36 ?

I never did assembly on the S/3, so I can't address it.   IIRC (and it has been
a lonnngggg time), the 5340 (ie S/34) and the 5360 (ie original S/36) had
similar if not identical instructions sets.  The 5360 may have been a superset
-- I don't recall.  In any event, the instruction sets were rather sparse.
Although not technicaly RISC architecture, they always seemed to me to have a
rather reduced (ie sparse) instruction set...

The 5362 used the same instruction set as the 5360, but the 5364 (and later the
5363) added another instruction which was a duplicate of an existing
instruction.  I believe its only purpose was to inhibit SSP and LPP's from being
moved from a 5364/3 to the higher cost 5360/2 boxes.  SSP and LPP's were
compiled using the new instruction, which would cause an error if restored to a
5360/2.  HLL compilers never created objects using the new instructions so
customers could freely move load modules between any of the models.

Doug