Konami '0005293' reproduction

Another custom IC from Konami GX400 hardware has been reversed.After the '0005292' I reproduced time ago I took into account the '0005293' that can be found always on VIDEO board of this arcade system.  

It shares same SDP64 package :

Technically this custom IC is a priority handler, pinout can be found on Nemesis schematics :

For my task I made use of Salamander bootleg (where this and the other custom ICs have been reversed with the use of 74 series logic gates ) and gathered all info found on the net about the '0005293'.Prototyping was encouraging so I came to this replacement :

After some adjusting of the code and adapting the timing to the hosting hardware the testing of the replacement was successful on my boards :

X-Men (Konami) PCB repair

Recently I've been sent an original Konami PCB for repair.The board was not in mint condition, it was heavily reworked, a lot of ICs (RAMs, ROMs, TTLs) were socketed and replaced.

Board was marked as working but with missing sprites, that was indeed what I got when I powered it up :

I entered in TEST MODE and performed a MASK ROM check which reported all the sprites devices as not good :

Object are handled by two custom ASICs (in QFP120 package) that work as pair, the '053246A'  (which generates the addresses to the MASK ROMs) and the '053247A' (which draws the sprites) :

Looking at schematics made by 'jotego' from MiSTer (thanks to him!) I checked the connections between these custom ICs and the rest of the board, everything was correct.But when I went to probe the '053247A' I found some stuck outputs :

These are the color and priority bits sent to the '053251' (the priority control custom IC) :

The '053247A' was most likely faulty so I decided to replace it, luckily I had a donor board to take the part from. 

Desodered the defective part with hot air :

Installed the spare :

The sprites came back :

Another successful repair.