stray read bug

I finally chased down the reads to dff6 in Space Fury and Zektor.
Turns out there is a bug in the code that blanks the display. It
appears to only be used in Space Fury just before the scrolling
instructions start, and in Zektor when they blank the screen to
say "player 1". They're walking the symbol list clearing the
last symbol bits using a RES 7, (IX-0ah) instruction, but IX is
pointing to the start of vector RAM (0xe000), so they go backwards
10 bytes into the weeds.

The only reason I mention this was at one point Clay was looking
for a place to map in some RAM, so you probably don't want to
put it at 0xdxxx. Besides, the downloadable RAM on the Universal
Sound Board is at D...
Received on Sat May 31 01:30:24 1997