Question

[mgos307]

I have a question for you:
Is it possible in the debugger to start instead of 3 shots in duck hunt for example with one or two shots?
How to do it? Anyone know?

Address of shots in duck hunt is 00BA.
Please help!

[Tony H]

This will point you in the right direction... http://codehut.gshi.org/DebuggerGGcodes.txt

[mgos307]

I don't understand it...

If address in duck hunt is 00BA so i must choose write (in debugger)?
But i want to start a game with 2 bullets for example. How to do it?

[rimsky82]

Go to the Duck Hunt menu. Put a write breakpoint on 0x00BA. Start a new game. Wait for the break. See if the value being written is 3. If it is, look at the code to determine where the 3 is being loaded into memory. Change that address to 2.

If you can't get it by tonight, I'll help. But I don't get home for another 12 hours.

[mgos307]

I have done it myself.

PS. i have a big suprise for NES fans... New game genie code for Mach Rider!

[mgos307]

rimsky82 i tried to create a game genie code (inf. lives in sky destroyer on NES), debugger stopped at address: C7A9 -> Stopped address (I changed value 95 to 02 (lives) in compare then i put 04 in the value box and nothing happens, no more lives at start...) but the address to start with 2 lives (standard) is C7BB.
Is there an way to locate that address easily?

[rimsky82]

If you're looking for an infinite lives code, the number of lives you start with is irrelevant. You want to start a game, put a write breakpoint on the number of lives in RAM ($002C), and then die. When it breaks, you'll want to alter the code so it doesn't decrease lives. That's usually done by reversing a STA into a LDA, but some games will use the DEC instruction instead, that you can make a zero-page LDA, I think.