[Coco] CoCo Questions

[Dan Olson]

Hi,

I'm new to the list, I've recently gotten interested in the CoCo again and 
haven't had any luck finding much useful information on the 'net so I hope 
I'm in the right place.  I've been thinking about trying my hand at 
building my own cartridge, but I hate to tear apart one of my good ones, 
as I have so few...and it looks like there's a screw under the label. 
Does anyone have one in the junk pile that they'd be willing to part with? 
I've also been wondering, on a 64k machine, I know that part of the memory 
has to get mapped out in order to use the BASIC ROM, can BASIC actually 
make use of the full 64k of memory (without pokes and peeks) or is the ROM 
always mapped in instead of RAM?  Also, I've seen some mention of sound 
cartridges and other things that plug into the cartridge slot (aside from 
the more common MPI, disk, RS-232) but have seen little more than that. 
Is there a more complete list somewhere?  For that matter, any pointers to 
web sites with technical info would be great too.  Sorry about all the 
questions (jumping all over the place) for a first-e-mail, hopefully 
someone out there can point me in the right direction!  Thanks.

 	Dan