Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!husc6!cmcl2!rutgers!princeton!udel!rochester!PT!andrew.cmu.edu!cg13+ From: cg13+@andrew.cmu.edu (Curtis C. Galloway) Newsgroups: comp.sys.cbm Subject: Re: memory map conflict.... Message-ID: Date: Fri, 25-Sep-87 10:54:42 EDT Article-I.D.: andrew.MVKcCmy00Vs909M0Lq Posted: Fri Sep 25 10:54:42 1987 Date-Received: Sun, 27-Sep-87 01:39:14 EDT Organization: Carnegie Mellon University Lines: 19 In-Reply-To: <1556@killer.UUCP> >On page 265 of my Programm's Ref (C-64), for the map at the bottom, it says >that for loram=1,hiram=1,game=0,exrom=0, an 8K ROM cartridge is switched into >$8000-$A000. > >On page 266, for the map at the bottom, it says that for >loram=1,hiram=1,game=0,exrom=0, a 16K ROM cartridge is switched into >$8000-c000. > >Same signals, two different memory maps??? Something's not right here! All is well. Note that $A000-$8000 = 8192 bytes = 8K, while $C000-$8000 = 16384 bytes = 16 K. The 16K ROM takes up twice the space of the 8K ROM, so the memory maps must be different -- but they both start at the same address, $8000. --Curt Galloway cg13+@andrew.cmu.edu ...ucbvax!andrew.cmu.edu!cg13+