Hi,
As I understand it, the beam does not return without a VSYNC. But, is it
common for coders to let the beam sit at the end of the frame for a while
before executing a VSYNC? I have seen the bahaviour below quite a bit
while writing my emulator:
-------
TIA_w - VBLANK Start
TIA_w - WSYNC
Main Callback - current line is 261
Scanline Callback - current line is 261
Scanline Callback outside of FRAME!
TIA_w - WSYNC
Main Callback - current line is 261
Scanline Callback - current line is 261
Scanline Callback outside of FRAME!
TIA_w - WSYNC
Main Callback - current line is 261
Scanline Callback - current line is 261
Scanline Callback outside of FRAME!
TIA_w - VSYNC Start
TIA_w - WSYNC
Main Callback - current line is 0
Scanline Callback - current line is 0
TIA_w - WSYNC
Main Callback - current line is 1
Scanline Callback - current line is 1
TIA_w - WSYNC
Main Callback - current line is 2
Scanline Callback - current line is 2
TIA_w - VSYNC Stop
-----------
Enlightenment Please? What am I missing? :) You'll notice that all I do
is reset the line counter when a VSYNC is written to.
Ben
PS: May I send a screenshot of my combat screen that I get in my emu to
anyone? The screen is scanline-truncated at the bottom for some reason,
even though when I run, say RiverRaid, the screen looks perfect :/ Anyone
willing to help? Does Combat do anything special which I should be aware of?
TIA - umm, thats thanks in advance, not the damn 2600 TIA - how many times
has that joke been used on this mail list I wonder? ;)
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