siggi wrote: IMHO it would be a better solution, to replace the PSEUDO-HRG routine, that you use, by a TRUE-HIRES routine (like WRX). That would then only require the easy "Wilf's 2 diodes" modification of the 16K ram pack and then your program would run on most other Zeddies. And you would also have the full graphical resolution (not only 1x2 "fat-pixels").
Ok. It will be my next step.