I used EDTASM6309 to develop a working version of IMUrbane as Steven H Fischer the originator of Urbane called it. It stores the Urbane source and a good part of the ml code in hi-mem. It takes three virtual disks in a RGBDOS version of coco emulator to develop it. It has a lot of flaws in its final form, too. I’ve moved on to using lwasm, but I realized I should publish what I have working. Maybe someone will find it interesting. I’m putting it on a single virtual disk.