[Simh] Is it possible to simulate the first Vaxen I ever used?

[Eric Smith]

On Mon, Mar 23, 2020 at 11:35 AM Robert Armstrong <bob at jfcl.com> wrote:

> > Timothe Litt <litt at ieee.org> wrote:
> > KS10 ... The 8085 code is crammed into UV EPROMs.
>
>   Was all of the KS CFE code in EPROM?  On the 730 only a small kernel of
> 8085 code (about 2K as I remember) was in ROM/EPROM and the rest of the
> 8085 memory was RAM.  The first thing the 8085 did at power on was to load
> the rest of the 8085 code from the TU58.  That made it possible to issue
> updates to the CFE code as well as the microcode.
>

All the KS10 front end 8080 code (not 8085!) was in EPROM, up to four 2716
EPROMs for 8KB of code. There only RAM was two 2114 chips (each 1Kx4), for
1KB of RAM. The 8080 code would load the KS10 microcode from mass storage.
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