Better N64 RAM Map? [Resolved]

[Guest sakura]

In the current hack I'm working on, I've encountered part of the game that reads from 0xA6001010 which is clearly one of the special reserved addresses (like the DMA regs) . However, searching for what it is yields literally 0 results, even with a search as vague as "A6001010 +N64". I've looked through my documentation, attempted to search and I'm kind of stumped as to what this is. It's just a single word long too, so maybe someone has some better documentation than I do and can help me figure out what this is used for.

[Jason777]

First off, let me say "nice find."

 

I remember reading something about this in some other N64 emulation forums and am looking for the posts as I am writing this. From what I remember, 0xA6000000 through 0xA63FFFFFF is memory that the 64DD (disk and registers?) uses and shares along with the PI bus. In other words, you have found a call to 64DD data within the ROM!

 

Alright, a little google search and this what I have:

http://www.emutalk.n...hp/t-34932.html

http://www.assembler...hp/t-11067.html

http://www.google.co...p7uDTEDps&mvs=0

 

I used to have a picture which gave the addresses to the special registers of the N64DD (the ones beginning with the name "Leo") but have since lost it, sorry. Good luck with this!

[Zeth Ryder]

You mean this Jason?

http://www.eurasia.nu/wiki/index.php/N64ddCommands

[Twili]

0xA6000000 - 0xA63FFFFF is the 64DD IPL ROM.

[Guest sakura]

Thank you guys!

 

Confirmed by checking 0x1010 in the IPL ROM, 0x2129FFF8 is the value OoT is looking for exactly, so I found basically a "Is the IPL ROM loaded?" check.