Aaron Kulkis wrote:
> Hans Witvliet wrote:
>> On Fri, 2007-12-07 at 12:59 -0500, James Knott wrote:
>>> The Data General Eclipse line had a feature called "Writable Control
>>> Store", which could be used to add custom instructions to the CPU.  The
>>> VAX 11/780 had it's microcode loaded from floppy at boot, but I don't
>>> recall if it was changeable in the same manner as the Eclipse WCS.
>>>
>>
>> Floppy?
>> It was a real huge 8" flop ... (still have them here)
>>
>
> Holding all of about 50k or so?
>
> I remember seeing some of those in an office supply store
> in Hafir-Al-Batin, Saudi Arabia back in 1992.
>
>> hw
>
>
>
IIRC, the ones in the VAX were about 128K, though some systems, with
double sided, double density disks could do half a meg, though I recall
some mention of 1 MB on a single 8" floppy.


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