V2.4 : 31-May-2021 by Dave Bernazzani (wavemotion)
A bit more juice squeezed out of the TIA. Added cart-specific options
to bypass VerticalBlank zero (not all games need that memory cleared if
we are dealing with a static screen... and this buys us CPU cycles!) and,
somewhat more dangerously, HorizontalBlank clearing can be disabled for
more speed. Only a few of the more stubborn games utilize these!
Removed PAL/NTSC option... only NTSC is supported (all games were released
in NTSC except a dozen PAL exclusives which have long since been converted
to run on NTSC - Search Atariage).
General cleanup and minor memory/code optimizations to get the most out
of the emulator.
Added 2 more lines of resolution before the top of the screen and 5 more
below... this allows the games that utilize underscan and/or significant
overscan to show properly.