@w8emv @ishotjr @sad_electronics @johnlogic @RobRetro4

*last update*

Okay, so I eventually got it all working. I replaced whatever incarnation of "z80asm" had once been used to assemble the BIOS, BDOS and CCP parts of CP/M with the tiny, little "pasmo" #Pasmo assembler
(https://pasmo.speccy.org/). Much less pain, producing a working result!

I will create a #GitLab repo which will contain both, the esp-open-sdk I used and my adapted release of #cpm8266. I will also include the Pasmo assembler (source).

👆​
So eventually anyone interested in building a few #WittyBoards containing a full-blown #CPM system (ideal #XMas gift for nerdy collegues) can use that repo as a base. It's real fun as you can customize the disk images and content being flashed to the #ESP8266