forums.ps2dev.org

Thanks for the explanations.

Teaeg

Yes, I was referring to this document. Another good reference is Toshiba TX39 related datasheets --- PS1 CPU and IOP are derivatives/modifications of TX39. Fot me the differences between the PS1 CPU and the IOP are more interesting. For example, the IOP does not have PS1 GPU unit. So, in the PS1 emu...

Try searching for the psx.pdf file in Google --- it's a good overview of the PS1 architecture.

Teaeg

4) Although there is only 32MB of physical memory, there are other things mapped into memory locations above this. Mostly things like registers to control other devices (dmac, gif, etc) or 'exotic' extra memory (scratchpad ram, or even access IOP memory). For ease of use it is presented like ordina...

I guess this belongs to the EE development part of the forum... There are references here and there to the rom1 part of the firmware in the PS2. For example, [RO]man on http://ps2dev.pgamers.com/ mentions it, but does not go into any details. Does anyone know where rom1 resides and what it contains?...