Timing is wrong

[stewmath]

Timing is wrong

[Stewmath]

I've noticed a similar phenomenon in Star Wars. When pressing select, it freezes in a loop where it waits for LY==0. But the VBlank interrupt interferes, and when it returns LY is already at least 1. Which probably also indicates some timings are slower than they should be.

[LemonBoy]

Also, sometimes the lcd_update sets the event cycle to a negative number.
LemonBoy@63b76fb is a start for a syncronized world :)
I did a quick test against NO$GMB and looks like GameYob is off by ~1 M-State

[LemonBoy]

https://github.com/LemonBoy/GameYob/tree/gfxfix

This branch actually fixes picky games like Robocop2, Altered Space and such that require strict video timings. instr_timing still fails and Pokèmon Crystal isnt working anymore. Still a little step forward.

[Stewmath]

Another timing related issue: Super Mario Land's top statusbar (see #59). This also occurs in bgb.

[Stewmath]

This issue is old and a bit vague, so I'm closing it. I think most of these specific problems have been fixed.