[Coco] [Color Computer] Re: OS-9 as Replacement for DECB.

[jdaggett at gate.net]

James

Not if you include an instruction like Call/return that takes 
advantage of the increased program counter size. One method can 
be as simple as the extra byte is treated as mapping 256 64K 
pages. That yields 16 MBytes of address space. 

The HC12 essentially does that. 

james

On 8 Sep 2005 at 7:10, James Diffendaffer wrote:

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> A big program counter isn't much good if you can't even load/store to
> in from registers.  To do it right means new move instructions, larger
> registers, longer jump/jump subroutine instructions and a long return
> from subrouting would also need to be created.