On Fri, 11 Oct 2002, Manuel Polik wrote:
> > The 6507 has only 13 address lines, providing an 8K
> > address space.
>
> Is that true? Why do I need 8K BS then?
Yep, that's true! But on the 2600, A12 is used for the cartridge
enable line. Thus, only A[11:0] are available as actual address lines.
This is something that programmers sometimes forget or abstract away.
But every day, us hardware guys lament the total lack of control lines
in the cartridge port. No read/write, no enable, not even a clock line
for crying out loud! All this to save 50 cents per VCS by going from 30
to 24 pin connector. ARRRGGGHHHH!!!!
Ok...I'm better now.
-Chris
PS. I'm still feeling dirty for that evil DOOM monitor-hack post. :P
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