I'm trying to run Intel 8K Basic Ver 1.1 from external ram. I have made my external ram system PSEN-able from 6000H to 7FFFH and almost all of the functions work correctly. However, I seem to have corrupted the mapping of new variables. For example, trying to set T=0 causes the system to reset. I can run simple print statements, and enter programs. All known Tokenised statements work correctly, but no new variables can be entered. Has anyone else tried to do this ? I have obviously not correctly mapped certain program fetch routines, but am at a loss as to which ones. Any help gratefully received.

Regards.

Dan