The remake was written entirely in 6502 assembly language, using the P65
portable 6502 assembler. (The P65 assembler has since been superceded by
-the Ophis assembler, which is now used in the build process.) The memories
-of my disappointment at the poor performance of the original game had hung
-heavily on my mind (well, maybe not *that* heavily,) hence I endeavoured to
-make the remake as fast and as smooth as I could.
+the Ophis assembler, which is now used in the build process -- in fact,
+Ophis version 2.0 is assumed.) The memories of my disappointment at the
+poor performance of the original game had hung heavily on my mind (well,
+maybe not *that* heavily,) hence I endeavoured to make the remake as fast
+and as smooth as I could.
This was largely accomplished by the use of a raster interrupt which is
triggered at the very bottom of the screen. This interrupt runs a routine