[Coco] DECB DOS Command

[tim lindner]

I was just reading the Disk BASIC unravelled book and came away with the
following question:

Why does the 'DOS' command first issue a SWI3 instruction?

Disk BASIC sets up the SWI3 vector to do nothing. It just returns to the
caller. 

Also there is a bug noted in the DOS command: It will read track 34 from
the last drive used. It is documented to only read track 34 from drive
zero. But drive zero is just what DECB defaults to.

-- 
tim lindner
tlindner at ix.netcom.com                                            Bright