On Wed, 8 Nov 2017, CuriousMarc wrote:
Awesome! The microcode listings would be fantastic too, as I also have a 2749 (which you are supposed to be able to program in assembly)! Let us know
The firmware is already on bitsavers, IIRC. But you can program every 264x terminal in assembly. There are some games like Pong, Space Invaders etc. for these terminals, both for the i8008 based 2640/2644 and the i8080 based 2645/2648. These terminals all have a special control code sequence to load a binary file (either from tape or from the serial line) into memory and start executing. It is "<ESC> & b". A short description and sample program for the 8008 based terminals can be found here:
http://computermuseum.informatik.uni-stuttgart.de/dev_en/hp2644/diag.html Christian
