The LDA and ORA are two of the memory changes that Frank suggested.
Might be able to patch the code, I'll have to check that out.
dang! 14 scan lines of V-Sync. That probably is way too much.
Thomas Jentzsch wrote:
Darrell Spice, Jr. wrote:
Air-Sea Battle - shots either don't register or a shot on lower row
blows up ship on topmost row
This code seems to the reason:
lda CXM0P
lsr
lsr
ora CXM1P
If the unused bits are not zero, the M0 collisions won't work.
Canyon Bomber - screen rolls like crazy
This game produces a vertical sync of 14(!) lines, maybe that's too much?
Maybe that helps.
Have fun!
Thomas
_______________________________________________________
Thomas Jentzsch | *** Every bit is sacred ! ***
tjentzsch at web dot de |
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--
Darrell Spice Jr. --==> http://www.spiceware.org <==--
* Emulators for OS/2! Stella = Atari 2600 ColEm = ColecoVision
MasterGear = Sega Master System, Game Gear, SG1000, SC3000
VGB = Game Boy, Game Boy Color, Super Game Boy
* OS/2 programming info also available.
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