I made additional research on connections between old GPU chips: http://psxdev.ru/images/wys/old_gpu1.png (Open image in new tab for full scale) (Based on older PU-8 motherboard scans: http://siliconpr0n.org/map/sony/pu-8_1-658-467-11/ ) Mentioned by Martin "142 OSC 53.20MHz" looks like pl...

Latest progress on my side. I was focused to improvement of chip reversing toolkit. In last few month two dedicated tools was developed. First one is patterns , used to identify standard cells over source image of polysilicon/diffusion layer. http://psxdev.ru/images/wys/patterns_preview.jpg Result d...

SCPH-1001 reversing:

https://github.com/ogamespec/psxdev/tree/master/reverse

IDA 6.5 project in SCPH1001.zip

GTE location is confirmed at bottom-left corner of the chip (Part 02). Source: http://www.psxdev.ru/images/wys/psxcpu_layout.jpg Almost all cells of this area are identified. There are total 6600 cells (Part 02), but some of them are used by MDEC YUV-RGB circuit (Akari working on it). Left part cont...

I don't see why we need a wiki. Wiki is a good tool for searching and structuring information, do not underestimate it ;) We have done a lot of work to gather information on a huge number of revisions of PSX motherboards and chipsets, only need is to bring a little update and cleanup. English trans...

Is there any place to keep all dumps together?

He opened it and wired mircowires directly to the chip internal bus.

It has only 512 byte of RAM And its impossible to inject code into SUB-CPU since you can control it only by setting CD-registers, which is not allow to do stack overflow or something.

This is single custom chip, made by Motorola. It usually labeled as IC304 and it was never integrated in bigger chips. On early MBs you can find it on side-B, its 42-pin IC. On modern MBs its usually located near SUB-IC (IC732). Both ROMs are inside. He managed to dump it by wiring directly to the c...

Hi everybody :) Not long time ago we started PSX chip research project : http://psxdev.ru Our primary project is PSX CPU ( IC103 ) We contacted some people and asked them to decap and image PSX chips, to further explore them. One decapper successfully depackaged CD-decoder microcontroller ( IC304 ),...