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ooPo

I know its possible to access IOP's memory from the EE, and I've heard things like the SPU/etc can be reached over the SIF... I'd like to know how. Before I start fooling with memory locations and sending random data can someone give me some pointers?

Drakonite · Site Admin Joined: 17 Jan 2004 Posts: 989

ooPo · Posted: Thu May 20, 2004 5:10 pm Post subject:

Its a start... now, how about those tasty devices? :)

mrbrown · Joined: 17 Jan 2004 Posts: 1536

Just use the same register address that you would use on the IOP. You won't be able to receive interrupts or transfer DMA to/from those devices using the EE.

TyRaNiD · Joined: 18 Jan 2004 Posts: 918

Isn't it slightly different for devices on the EE side ?

For example USB is at 0xBF801600 on the IOP side but at 0x1F801600 on the EE. Just replace the top nibble with 1 and it should work :)

ooPo · Posted: Fri May 21, 2004 3:27 am Post subject:

Its all the same offset.

mrbrown · Joined: 17 Jan 2004 Posts: 1536

Yeah, it's the same address. And you want to use the 0xbxxxxxxx version on the EE since it's uncached access. You'll need to switch into Kernel Mode first.