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Thank You!

Thank You!

Thank You. Will continue in summer (because my workshop is located in my balcony) :D

CONTINUE... Now when powering up the board … everything works correctly. The board is saved!!! Best Regards Oguz

CONTINUE... Next, I decide to replace the Fujitsu Palette RAM parts as well. I have the following equivalent RAM parts available: I remove the old RAM and install sockets. Now, when testing the old RAM out of circuit … they test as faulty. I install a new RAM part that passes the out of...

CONTINUE... Later on, I asked a friend who has the same board to check on his board, and he gets the same measurement, so there is no problem with these pins. On my board, I reflowed the solder on them just in case. I went ahead and reflowed the other GAs too. When testing the game again...

CONTINUE... 030 gfx2 020 gfx2 010 gfx2 000 gfx2 H1 H0 C3 gfx1 C2 gfx1 C1 gfx1 C0 gfx1 DA irem Then I had problems with 2 ROMs – both audio ROMs. SLO-A and SHO-A The ROMs are responsible for the playback of all sounds. These ROM comparison sites do not list results if...

Hello everyone, today I have another board on my desk which I purchased as “working” but while my board boots up, it has issues. Irem produced several models of motherboards, and this motherboard is M92. It is a 2-stack board, consisting of a motherboard and a ROM board. M92 does not have any...

CONTINUE... And now when I insert coins, I hear the sound of “ding”! Now the board works 100% – a happy ending. You can watch me test the board here: Best Regards Oguz

CONTINUE... Now I need fresh parts for this RAM but I don’t have it. It is 8K x 8 static RAM and has 28 legs. I take a look at a 28-leg RAM on one of the bootleg boards in my spare parts box and see that the pinouts are the same. I replace the ram on the left (U0611) with the one I...

CONTINUE... All of the ROM dumps check out – all is as it should be. One issue you may encounter when working with ROMs – sometimes the type of ROM is not written on the chip (this is common with mask ROMs). When that happens, we find the MAME driver file of the game board – this file is...

Today, I have a Raiden 2 PCB purchased “with Graphics Glitches”: This PCB uses the -5v power rail for audio. Make sure that your PSU is also providing -5V. I’ll power up the PCB and look for the graphical glitches mentioned by the seller. As you can see, there are a lot of nonsense...

CONTINUE... Time to power up and give it a shot! Well, the graphics are looking better than before, but they’re still bad. Here’s the video: Next, I simulate a corrupt C7 ROM in MAME in the same manner and see that the same sprites glitch. So I go ahead and change out the C7 mask ROM for a...

Hello everyone, this time I have a SNK Neo-Geo MVS game cartridge on my desk. It has glitches with some of the graphics. MVS cartridges consist of 2 boards – the PROG board and the CHA Board. This particular PROG Board holds 16-bit P ROMs and V ROMs. P ROMs are Program ROMs. Some other...

CONTINUE... Then I remember something – an IC fell out of the package… When I asked the seller about this IC, the seller said that it must have been mixed up while packing the board and that it had absolutely nothing to do with this game… I immediately remove the ROM daughterboard and look...

Hello everyone, this time I have Moonwalker – perhaps my favorite game – on my desk. I bought this board “as working” but when powering up, I found out that the board doesn’t boot – it shows no activity at all.. And an IC fell out of the shipping box. But the funny thing is that there is no...

Ahahah for sake konami didn't make a game called "Crash Course" :)

CONTINUE... Just when I’m about to give up, something catches my eye. Did you see it? Look a little closer.. Yeah, right there… The IC with the F emblem. It’s a flip-flop circuit. But the important thing here is the brand. Fujitsu ICs are the most prone to failure. I take my Logic Probe in my...

CONTINUE... I carefully remove the old RAM by desoldering it from the board. I’m out of suitable sockets for that pinout, so I cut down a large socket. It’s not fantastic but it does work! The part number of the RAM that came out of the board is MB8416A-15L-SK. I have a similar part that I...

Hello everyone, this time I have a Konami Asterix board that I got from the Arcade Museum forums. I bought it as non-working “error with 2 chips” at an affordable price. This is the board: I immediately attached it to my JAMMA Test Rig and powered it up. Indeed, we see 2 defective chips on...