PAL on CDU-700 / 710 Unibus disk controllers

[Glen Slick]

On Tue, Apr 26, 2016 at 3:04 PM, Ian Finder <ian.finder at gmail.com> wrote:
> The spec sheet from the PAL mfg. (signetics PLS173) seems to indicate
> security fuses aren't an option on the model on my board. I have not
> actually tried yet.
>

A PLS173 does not have a security fuse.
A PLUS173 does have a security fuse.

On my CMD CDU-720/M there are some PLS173 parts, but the CSR decode
PAL is a PLUS173 part, so I assume it is secured.

Double check whether the CSR decode PAL on your CDU-710 is a PLS173 or
a PLUS173.

-Glen