starman said:Ah that's kind of weak. Well, I suppose I'll be keeping my GB color around even when buying a DS lite.
Out of curiosity, anyone know why this is so? How was the original GBA backwards compatible then.. I'm pretty sure the DS uses and ARM9/ARM7 combo, and the GBA had an ARM7, so GBA backward's compatibilty is a no brainer.
What did the original GB/GBC use, a Z80?
barf said:Yes, the GBA had a Z80 style of processor (actualy an advanced one), with a standard GBA cartidge iirc it was in passive mode, operating som i/o communication tasks and while in active mode it was acting as GB/GBC cpu.
On DS, it s kinda the same thing, the DS ARM9 performs DS games code execution and ARM7(GBA cpu) does i/o (and sound) when in DS mode, and in GBA mode the ARM7 becomes master. No z80 anymore, so no GB/GBC compatibility.
Actualy, it was the same on the Genesis too, there was the SMS cpu used for i/o