[Coco] Re: Why USB would be nice.

[jdaggett at gate.net]

JOhn

Both the keyboard and joystick routines are about 400 lines of code. 
Considering the programing model of the 6502 compared to that of 
the 6809, I would rather think that both the keyboard and joystick 
drive can be combined and only be about 400 lines of code. The 
goal is to get to 300. This will most likely keep the code size to 
about 1K.

I am already looking at the keyboard driver and have it into Portal 9 
and currently chaning all 6502 pnuemonics to 6809. T hen will come 
the code chrunch. With the extra registers that the 6809 has there 
will not be as much need to push and pull from the stack and 
swapping the accumalator between the two index registers. Also 
pointing to the table for key capcodes will be faster and easier.

james

On 2 Sep 2005 at 12:14, John R. Hogerhuis wrote:

Subject:        	Re: [Coco] Re: Why USB would be nice.
From:           	"John R. Hogerhuis" <jhoger at pobox.com>
To:             	CoCoList for Color Computer Enthusiasts 
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Date sent:      	Fri, 02 Sep 2005 12:14:43 -0700
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> Take a look at the drivers over at microusb.org . If you think of USB
> as some nightmare stack of code, you may be pleasantly surprised to
> see what the 6502 folks have done.