[Coco] Re: Someone here who knows Japanese?!?

Arthur Flexser flexser at fiu.edu
Fri Jan 7 17:35:23 EST 2005


On Fri, 7 Jan 2005 jdaggett at gate.net wrote:

> 
> I also wonder also if Hitachi kept the $3E opcode (restart)? I do see 
> that the $14 is SEXW and the $15,$18, and $1B are not used. 
> These may have activated the IRQ, FIRQ and NMI partially from 
> software. I seem to rember something from about 20 yrs ago that 
> you put fcb  $1(4/5/8/b) in the code and you entered the ISR. Also a 
> FCB $3E would reset/restart the computer. 
> 

The $3E restart opcode is not implemented in the 6309;  it vectors you to the
"illegal opcode" address.

Art




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