For Sale: HP-71B MultiMod ROM Emulator

[Didier Lachieze]

(03-28-2021 05:01 PM)rprosperi Wrote:  Installing the MM and configuring my system to use it as I need it took about 30 minutes all-in, including one bungled attempt as I did not initially remove my batteries (Bad Bob! Bad!) and left a RAM module installed; I've no idea which, if either, was the issue but I note it here as possible hint if other folks have trouble with installation.

I had the same issue when installing the MM in my HP 71B: I didn't follow the recommendations in the manual and kept the batteries in the 71b and didn't remove the jumper JP2. After POKE "2C000",“1“ no additional ROM was showing up in VER$.
I feared that I had bricked the MM. I removed everything, batteries, MM and JP2 jumper, and restarted the whole installation procedure as described in the manual and this time it worked OK.