On 01/06/18 18:40, Eric Smith via cctalk wrote:
On Fri, Jun 1, 2018 at 11:08 AM, Robert Armstrong <b...@jfcl.com> wrote:
Eric Smith <space...@gmail.com> wrote:
The control stores of the 11/785, 8600, and 8650 were entirely WCS.
All other VAXen had (relatively) large ROM control store and tiny WCS or
patch store.
You forgot the 11/730 and 725. The KA730 used 2901 bit slicers and the
control store was entirely in RAM. After power on it was a paperweight
until the 8085 CFE loaded the microcode.
Thanks for the correction! I've never used those models.
In the Digital Technical Journal #2 (the one that describes the
development of the MicroVAX II)
they say that they used the VAX-11/730 as a testbed
the 78032 chip. The VAX-11/730 was chosen because it was "an entirely
'soft' machine".
(The VAX-11/725 is essentially the same hardware but in different
packaging).
Antonio
--
Antonio Carlini
arcarl...@iee.org
