Mega Typhoon WHDLoad

[ransom1122]

A1200 - With Cycle Exact it won't work. Ive left it for way longer then 10 seconds.

Ive Warped Speed in WinUAE and seen if it takes over 5 mins or longer but it still stays on a black screen.

[modrobert]

Originally Posted by ransom1122

A1200 - With Cycle Exact it won't work. Ive left it for way longer then 10 seconds.

Ive Warped Speed in WinUAE and seen if it takes over 5 mins or longer but it still stays on a black screen.

Just curious, can you try the NOCACHE icon tooltype when using "cycle exact" and see if it works then?

[ransom1122]

Originally Posted by modrobert

Just curious, can you try the NOCACHE icon tooltype when using "cycle exact" and see if it works then?

No change

[modrobert]

Originally Posted by ransom1122

No change

OK, I assume there is some other problem with the WinUAE emulator or config settings when enabling "cycle exact" since this works on real hardware.

[Toni Wilen]

Does it really poll VERTB bit in INTREQR with vertical blank interrupt enabled in INTENA? It is never a good idea, depending on HW/CPU model/caches/etc, interrupt handler may almost always "win" and poll almost never sees the bit set or it can also cause long random delay before poll sees VERTB bit set.

[modrobert]

Originally Posted by Toni Wilen

Does it really poll VERTB bit in INTREQR with vertical blank interrupt enabled in INTENA? It is never a good idea, depending on HW/CPU model/caches/etc, interrupt handler may almost always "win" and poll almost never sees the bit set or it can also cause long random delay before poll sees VERTB bit set.

Yes, it runs the code I pasted in the "CONTINUE ?" screen (not in any other part of the game AFAIK), I tried replacing it with NOPs and only did the RTS for test which made the 10 second timeout finish in less than a second, so it's relying on it for the delay count (and top of screen).

I'm not sure if it turns off the vblank interrupt somewhere else in the code for the "CONTINUE ?" screen, but suspect it does which interferes with the vbl_hook code handling the CD32 joypad protocol in slave not being executed fully (or triggered to fast, just speculating). HRTmon hotkey button "\" fails during this countdown screen as well, had to enter before while still in game and then set a breakpoint.