z26 problem and fix w/Pitfall II

[Great Hierophant]

v2.12 will not start "Pitfall II - Lost Caverns (1984) (Activision) [!].bin" but will run "Pitfall 2 (1984) (Activision) (PAL) [!].bin", "Pitfall 2 Plus.bin", and even [b1] [b2] [b3] to the extent they can be run. All I get is a blank screen. One difference between the non working file and the working files is that the non-working file is one byte longer than the working files ([b2] is an underdump.)

 

I was able to fix the problem by deleting the last byte of the non-working game in a hex editor and now it works as normal in z26.

[Eckhard Stolberg]

Yes, z26 enables the Pitfall II bankswitching and extra chip depending on the size of the ROM image file. There should be no need to mess with the overdump though, because except for the unnessessary extra byte it should be exactly the same as the normal Pitfall II binary.

 

 

Ciao, Eckhard Stolberg

[Great Hierophant]

The need to edit the file was because the game simply would not work at all with the extra byte and there is no override option in z26 to force the emulator to use the Pitfall II mapper. I assume that z26 did not work because the extra byte increased the size to something it did not expect.