[Coco] 6309 Division instructions

[Robert Gault]

As you said in another message, this instruction is not very useful. The 
range of useful values are very limited and there is not adequate 
notification of error. Indeed the time required to screen for acceptable 
numbers would be prohibitive.

Chet's info is in error. As the 6309 instructions are not supported by 
Hitachi, it is prudent to test them before use to verify expectations.