How do I make and convert N64 Gameshark codes?

[ReyVGM]

I found an emulator called Bizhawk that lets me RAM search N64 games just like FCUX and SNES9X, and I would like to use those codes on the Project 64 emulator due to issues with a plugin.

So my question is, how do I convert that RAW (?) code into a Gameshark code that PJ64 can recognize?

I found this code for Yoshi's Story to finish levels quicker after picking just one fruit (0F89D0:30), but a GS code should have 8 address digits and 4 value digits or else PJ64 doesn't recognize it. I tried using this site's convertor, but the resulting GS code didn't do anything. There's also a code on the database for what I'm looking for, but that doesn't work either.

Anyone has any advice?

[Demonic722]

What happens when you append "80" to the front of the code? I believe that is the code type to write 8-bit values/1 byte.

800F89D0 0030

Try that.

[ReyVGM]

It worked.

So that's it? Just put 80 in front and 00 next to the value?

[Demonic722]

Yeah, and if you're writing 2 bytes, use "81" instead.

8-bit write
80xxxxxx 00??

16-bit write
81xxxxxx ????

[ReyVGM]

Oh I see. Thanks!

[vgcuts]

What about 4-byte codes? How do we convert those?

[lee4]

What about 4-byte codes? How do we convert those?

read this thread
http://gamehacking.org/vb/threads/16613-Question-About-Gamesharks-psx-With-Key-!

i show how to breakdown 4-byte into 2-byte