David Brant wrote: > Just to put a spanner in the works. JP's are faster in external memory.
JR and JP will both be 12T in external memory, which is the same speed as they are in internal RAM during the border area. External RAM gives the same speed boost as disabling the display, by avoiding the slow-down when the main screen is being drawn. JP is only faster than JR in ROM code, where the official Z80 timings apply. Simon Goodwin's fractal viewer makes use of the extra speed in external RAM. Does anything else use it for more than just the extra space? Si
