[Coco] 6309

jdaggett at gate.net jdaggett at gate.net
Mon Oct 8 08:31:01 EDT 2012


On 7 Oct 2012 at 18:34, mike delyea wrote:

> Does the Q accumulator mean the 6309 can address 32 bit memory?


No the Program counter is still 16 bits thus 64K of memory space. 

To access outside a 64K memory space you have to use a MMU (Memory Management 
Unit). 

The Q register is most useful in doing 16 by 16 bit multiply or in doing the 32 by 16 bit divide. 

james




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