Re: CP/M on //e?

[ds_spenc@alcor.concordia.ca (Doug Spence)]

Louis Schulman (louiss@gate.net) wrote:

: What you evidently have is a timing problem that occurs with certain coprocessor
: cards (like the Z-80) and certain versions of the //e.  The fact that you have a 
: Revision A may be relevent, because this problem does not occur for everyone.

Argh!  How was the timing changed between the ][+ and //e, and why?  
(Oops, that looks rather technical. ;) )

: I have no problem with any version of the Z-80 cards or with the Stellation Mill
: 6809 coprocessor on my revision B //e.  But the person who sold me the 6809
: card couldn't run it on his //e, but it ran on his //+

6809!  That's cool, I didn't even know you could get a 6809 card for the 
II.  Can you run OS-9 on it?  That would be something fun to try.

: The bottom line is you will probably need a different Z80 card, and/or a different
: //e.  I don't know of any cure for a timing mismatch.

This looks rather bad.  I guess it's time to start rummaging for a new 
Z80 card, as I'd rather not have to lug another //e home via public 
transport.  (Ever carried something like that in a crowded subway and 
bus? :) )

: Louis

Thanks for your reply.

Doug Spence
DS_SPENC@alcor.concordia.ca