Viewing profile — dinartem

We still used the lwarx/stwcx pair to implement atomic operations, but to avoid the hardware bug a strict rule needed to be followed. Rule: On a given hardware thread (there are tw…

So the PPC instruction set uses lwarx (load word and reserve indexed), and stwcx (store word conditional indexed), along with variations for word size, to implement atomic operatio…

Actually Tracy never made it to Austin. He was going to fly in later in the week to continue bring-up, but since we were done by Wednesday, we just sent the chips to Redmond and he…

I called the simulator Sbox and it was just a simple console app. I didn't implement the GPU, so no graphics just the hypervisor and kernel and some simple non-graphics apps. I mad…

One challenge was that while I started working on the Xbox 360 about three years before it would ship, we knew that the custom CPU would not be available until early 2005 (first ch…

Good times. I was the developer at Microsoft who designed the Xbox 360 hardware security, wrote all the boot loaders, and the hypervisor code. Note to self: you should have added r…

No, I never spoke with them.

Xbox Security Protocol. We liked to add X to things back then.

That's a valid point about complex parsing. I remember being very concerned about adding unnecessary overhead to each packet during encapsulation. As for the SG, it primarily authe…

Nice work! Always fun to see something I wrote long ago reverse engineered. The packet format was indeed inspired by ESP over UDP, and I named it XSP. After system link shipped wit…