Van: Paul Koning via cctalk<mailto:cctalk@classiccmp.org>
Verzonden: woensdag 30 mei 2018 18:49
Aan: Camiel Vanderhoeven<mailto:camiel.vanderhoe...@vmssoftware.com>; General
Discussion: On-Topic and Off-Topic Posts<mailto:cctalk@classiccmp.org>
Onderwerp: Re: Modifying microcode
> On May 30, 2018, at 11:11 AM, Camiel Vanderhoeven via cctalk
> <cctalk@classiccmp.org> wrote:
>
> Depending on your definition of small, the MicroVAX 1, and the VAX 8000
> series (not that small). In both cases though, the ROM chips are a custom DEC
> design.
Didn't the 780 get its microcode loaded by the console LSI-11? And the 730
used bit slice processors (AMD 2901) as I recall, so that had to have its
microcode external.
paul
I always thought (…) that the TU58 cassette “in” the front of the VAX-11/730
contained the microcode. For ease, that cartridge was kept in the drive so
that it is available at boot time. Causing a lot of “D”shaped rubber rollers …
Henk, PA8PDP
