Subject: [stella] 6507 vs. 6502 From: jimn8@xxxxxxxxxx (Jim Nitchals) Date: Tue, 30 Sep 1997 06:37:13 -0700 (PDT) |
Greg miller writes about the jmp (indirect) instruction: > > Small note: I'm not sure about the 6507, but the 6502 and many of its variants > won't work properly, if a pointer in the table crosses a 256-byte page > boundary. Make sure your tables are either word-aligned or don't cross pages, > unless someone (Jim?) knows for sure whether the 6507 has this bug. The 6507 is *exactly* the same chip as the 6502 except it's put into a package with fewer pins to save a few cents on plastic and circuit board real estate. It has the same bugs and undocumented instructions ;) -- Archives updated once/day at http://www.biglist.com/lists/stella/archives/ Unsubscribing and other info at http://www.biglist.com/lists/stella/stella.html
Current Thread |
---|
|
<- Previous | Index | Next -> |
---|---|---|
Re: [stella] Re: Help with efficien, Greg Miller | Thread | Re: [stella] 6507 vs. 6502, Nick S Bensema |
Re: [stella] Re: Help with efficien, Greg Miller | Date | Re: [stella] stick/paddle combos, Eckhard Stolberg |
Month |