David Shoemaker wrote:
According to mame there is rom covering the entire memory range from0-FFFF
ROM Regions: ...
So the ram / rom address space must be bank switched. Question is how to do that so I can get a good ram test with the fluke? I can do rom tests just fine so the board must default to the rom bank's.
Suggestions?
Thanks,
David
____ As I recall the Defender Technical Service manual covered the bank switching in either the first (early board - 1 24 pin PROM) or second (2 PROM later boards) editions.
Yup, it's there...page 15 (Video Ram Control) of manual 16P-3001-301. Pretty sure they didn't change that at all (or very much?) for later boards. John :-#)# -- How to subscribe or unsubscribe from TTL http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: moving due to lack of space... _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ftp.flippers.com/TTL/TestEquipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/