DiscoStarslayer

🇨🇦 Reverse engineering games software and hardware for preservation and repair.
Git: sky: |at|

[DiscoStarslayer @DiscoStarslayer]

If you’re a PS2 hardware sicko, you may be aware of the floating point problem

If you were sad that it’s not possible to play stuntman in pcsx2, or your grand turismo recordings were not working quite right

Well, you can, today, with my soft-float recompiler build in the reply

[Dustin Holden - MakeMHz @LoveMHz]

Let the real fun begin!

[DiscoStarslayer @DiscoStarslayer]

@tomwarren Missed opportunity to put an electrolytic capacitor in that empty space for the true experience

[Dustin Holden - MakeMHz @LoveMHz]

And yes, we can patch the CPU itself!

Some of the obscure, difficult problems we’ve solved in Project Stellar’s software could potentially be handled through CPU microcode updates, allowing the original game code to run unchanged.

It’s far too early to say which fixes could benefit, but having the dumps is a huge step toward understanding what’s possible.

[Dustin Holden - MakeMHz @LoveMHz]

After 25 years, the original Xbox's last hidden ROM has finally been dumped: the CPU's microcode!

This has been a goal of mine for over 6 years, and I've worked on it off and on ever since.

Over the last couple of weeks, while building inventory and shipping orders, I've also been running hardware tests 24/7. This poor Xbox has rebooted over 50,000 times in those two weeks alone.

And it finally paid off.

The dump covers the entire 4,096-line microcode address space. The ROM itself occupies 3,200 of those lines, roughly 12 KB of microcode.

I can't overstate how huge this feels. After all these years, I finally have it.

A full write-up is coming next year!

[Myria @Myriachan]

Security folks this week: Pwned PHP

Also security folks this week: LOL “4”

Me: Oh hi I found a code execution exploit in the CD-ROM drive of a 26-year-old game console

[DiscoStarslayer @DiscoStarslayer]

Download here:

https://t.co/RICG4wYRwd

[DiscoStarslayer @DiscoStarslayer]

New build of PCSX2 Reliquary is now public!

Highlights are improved networking stability, VHD hdd image support and Parallel-GS fixes for RDNA2 and Arc. As always, latest upstream sync too!

Have fun!

DL in reply

[DiscoStarslayer @DiscoStarslayer]

People may wonder, why do I care about maintaining a pcsx2 fork with accurate mechacon emulation?

The reason is to enable others to do important work!

Work like making arbitrary code execution for the Xploder Parental Game Lock.

https://t.co/xy4NO57Bz3

[DiscoStarslayer @DiscoStarslayer]

People may wonder, why do I care about maintaining a pcsx2 fork with accurate mechacon emulation?

The reason is to enable others to do important work!

Work like making arbitrary code execution for the Xploder Parental Game Lock.

https://t.co/xy4NO57Bz3

[Enjoy Digital @enjoy_digital]

LiteX (with DDR3!) on Elgato Cam Link 4k (thanks @GregDavill, @ApertusOSCinema, @ktemkin for the "documentation" :) and utilities) https://t.co/EHRn1DslaQ

[Ryan M @Grimdoomer]

Here's the first release of the Xbox 360 Peer Pressure softmod. Blog post will be out in a few weeks with all the technical details. Barring any critical bugs I'll be "hibernating" for the next 2 months to recoup my sanity from working on this project https://t.co/MTP7adMt5m

[Engadget Gaming @engadgetgaming]

A long‑hidden PS2 security component has finally been decoded, revealing surprising design choices and opening the door to fresh hardware insights. https://t.co/5DQ2BLESUw

[Engadget @engadget]

A long‑hidden PS2 security component has finally been decoded, revealing surprising design choices and opening the door to fresh hardware insights. https://t.co/E7jpbEMuIh

[DiscoStarslayer @DiscoStarslayer]

We are somehow in the youtube poop era for compiled retail binaries

[Jose Coixao @notnotzecoxao]

20 years i've waited for this... props to jestero and everyone else involved in the project:

[DiscoStarslayer @DiscoStarslayer]

As Sony accurate float aficionado this nice to see

[Jose Coixao @notnotzecoxao]

https://t.co/aRhKDKwzqj nice

[Jose Coixao @notnotzecoxao]

https://t.co/aRhKDKwzqj nice

[Leo Oliveira @leo__oliveira]

CXD1869BQ die (D Chassis GH-013) at pin 35 (X_PEN). Pad exists but was left unbonded. Die shot from Libby (https://t.co/q6xh8LN7hV)

[Ryan M @Grimdoomer]

Let's talk about the Xbox 360 softmod...
https://t.co/bCLFgfyQZH

[Leo Oliveira @leo__oliveira]

MechaPwn folks are at it again. "XPEN" (X-Protection Enable) pin of the error correction DSP chip was discovered to be the toggle selection to turn on/off the behavior of -1 DSPs used on DTL-H hardware. This pin is pulled up internally by a resistor. Left unbonded in retail ICs.