10/17/2001 3:24:47 PM, Chris Wilkson <ecwilkso@xxxxxxx> wrote:
>On Wed, 17 Oct 2001, Erik Mooney wrote:
>
>> This is a GREAT technique for Supercharger-based games, since you
>> can rewrite the player graphic data to RAM within the same area of memory.
>> (Can this be done with Superchip or Megacart RAM? I think so...)
>
>
>Yeah, sure. Megacart RAM doesn't care what you do to it. (*) As long as
>it's one of the current banks, it's just more RAM to play with. I believe
>Superchip RAM is the same except that it's always switched in.
Actually, the concern is that the technique requires +/- 384 consecutively
addressable bytes of RAM. The Superchip doesn't have that much, although
you might be able to pull it off in a two-line kernel that didn't use the entire
screen vertically (think Defender). How does Megacart distinguish RAM
read/write? It would have to be a fairly high-order address line (A9-A11)
for this to work.
>(*) Don't set the RAM on fire, or subject it to nuclear reactions, but
>otherwise....????
Aww, c'mon, VCS hardware is legendary for its indestructibility :)
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