32
votes
Accepted
How did the X-Men game for Sega Genesis have its state survive a console reset?
The reset button should clear the console's memory.
No, it shouldn’t. The 68000 reset vector is the first eight bytes in cartridge ROM. The cartridge will point at its own initialization code; the ...
- 2,230
15
votes
How did the X-Men game for Sega Genesis have its state survive a console reset?
Similar methods have existed and are still used.
The reset does not clear the memory, it simply resets the CPU to start running code from start vector.
All the code needs to do is to check a known ...
- 28.3k
12
votes
How did the X-Men game for Sega Genesis have its state survive a console reset?
The reset button should clear the console's memory.
Why? And who should do that?
The Mega Drive is a very classic console. There is no OS or monitor (*1) that controls execution and prepares the ...
- 213k
10
votes
Accepted
Using the (An)+ to Memory addressing mode when address register is pointed to ROM causes Sega Genesis DMA to fail
I can't believe I only see this topic so long after it was post !
For reference: I made the 68k optimizations of the video engine of a recent and quite famous game.
The Genesis Software Manual scanned ...
- 659
Only top scored, non community-wiki answers of a minimum length are eligible