25 Feb
2021
25 Feb
'21
12:37 p.m.
On Thu, Feb 25, 2021 at 12:27 PM Al Kossow via cctalk <cctalk at classiccmp.org>
wrote:
On 2/25/21 10:43 AM, Chris Zach via cctalk wrote:
Interesting... Is this obfuscation documented anywhere (beyond looking at
SIMH code?) I was working on an RH11/RPxx emulation for the Unibone that
was partially working (and that I should really get back to...)
- Josh
Oh this is fun stuff. Is there a specification
write-up anywhere on the
MASSBUS overall?
there is some documentation on bitsavers
the register descriptions were intentionally obfuscated to prevent cloning
that was figured out to make SIMH work
the CDC drive interface was also slightly modified for the same purpose