[Coco] Michael Kline: Let me introduce myself...

[Robert Gault]

Right, you may be able to find "A Memo on the Features of 6309" by Hirotsugu Kakugawa in the Archive 
and there is information in the Hitachi 8/16-bit Microprocessor Data Book.

Anyway you can switch between the emulation and native modes using the MD register.
bit #      resulting value
7           becomes 1 on divide by zero
6             "     " on illegal instruction
1           0 sets FIRQ like 6809
             1 FIRQ same as IRQ
0           0 = emulation mode
             1 = native mode

All bits become zero on chip reset.

Robert

Michael Kline via Coco wrote:
> Hi Robert,
> Ok. I found them last night in CC Archive. I tried a couple of emulators (don't remember which ones). Some were not compatible with Windows 10, 64 bit.
> Mostly, I skimmed through some Rainbows, after I got the lot downloaded.
> My CoCo 2 arrives Thursday. I'm very excited. This unit has the Hitachi 63C09EP CPU. I'm anxious to take it for a test drive, after reading some of papers about it.
> I am wondering if anyone knows of a way to put it into "Native Mode"? Is there a poke to do this?
>