New! Pincoder Adapter

After fighting to get the sticker off, the chip isn't even an eprom. I can't find a listing in my GQ 4x4 for this prom. It is a MOS 5341-09554 4780. On the bottom it says Korea 4863(sorry for the crappy pics). Any advice? Thanks.

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It's likely a masked rom and that # is the williams part #. Just burn a new eprom and replace, making sure your board is jumpered for the correct eprom.

Thanks. I'm not sure about jumper settings, but I'll look into it. Does anyone know if this is a reputable place for eproms: https://www.twistywristarcade.com/eproms/118-2532-eprom.html ?

Never bought eproms from them but have purchased other things from them over the years.

It’s legit. I highly recommend them! I have bought multiple parts from him including Eproms.

Thanks for the replies.

Small update: I was able to verify check the 2 game roms as they are eproms and they came out ok. I couldn't verify check the 2 flipper roms as they are masked roms and are not listed in the GQ-4x4 database. I was also able to verify check the sound rom and 3 out of 4 speech roms. One of the speech roms has a leg that is broken off,(I think it's still in the socket. The sticker on it says "5T-5002" and the file is "Speech 5.532". So I believe I need two 2532 eproms, one for the speech rom and one for the flipper rom and one 2716 eprom for the other flipper rom, and a few sockets just in case. Correct?

Would it be this one?

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I received my eproms. I was able to write the 2 flipper roms successfully(1 to the 2532 and 1 to the 2716), but was not able to write the speech to the other 2532. During the write cycle, it goes all the way to 100% and then fails right after during the verify process(screenshot below). I've tried to put the eprom in the eraser for roughly a half an hour. It shows it is blank but I still can't write to it. Any suggestions? Thanks.

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I did not read all of your posts but keep in mind WMS really screwed up on the labeling of system 7 ROM chips around Black Knight era. The stickers almost never match what the board layout / ROM dump labeling. I forget which is mixed up, but at least two usually are. So if you have one not verifying right check the data against other ROM images.

Also, some ROMs have to be written to several times before they will verify. I'm not sure why but it has worked for me at least a few times.

Means the chip is bad.
Try dropping speed to "-2", and try "Double Write". If it still throws an error after that - chip is bad. Toss it, get another.

Thanks for the tips everyone. I'll keep trying to write.
As for the process stalling, I don't see any slow down during the write process. It goes up to 100% at a decent rate(says 12.17 seconds).

If the GQ-4X seems to burn a chip really slow and/or all the bits not stay flipped typically means the Vpp is too low. Usually this means you are trying to burn a 25vpp chip at 21vpp but also could be you need an external power supply and not just USB power.

All the M2732 (M2716 too) out of china are marked with A suffix. A good portion of them are 25v chips and some even 12.5v. When you burn the 25v type at 21v expect GQ-4x to take way longer than usual and you may have to repeatedly burn it over and over to get all the bits to stay right. When I pick the right Vpp it burns quick and right the first time.

If you burn a 12.5vpp chip at 21, or 25vpp it gets killed.
If you are not sure Vpp of dodgy china remark start at 12.5 (2732B) and go up until it seems to work.

The chip I'm trying to burn is a TMS2532A-45JL. The other one(same exact chip), burned and verified with no issues. Same thing with the 2716 I burned, no issues. Both burned pretty fast too. So I tried to burn the same file that worked with the other 2532 and it still wouldn't burn. These were all done with a powered USB hub. I may have a power supply laying around here somewhere and have to look for it, but so far it's looking like the chip is bad

On one happy note: after I put in the 2 new flipper roms I burnt, my game now boots!

probably just a bad EPROM if you can do other identical chips. Powered USB hub should be good enough as it is for the laptop I use to burn with. It has to boost 5v usb up to 25v for these old chips.

I have not had good luck reusing TMS2532. Even some that are working, I erase them, and then they refuse to take another burn. HN462532 has usually been more reliable to me for what its worth. I go with 2732 whenever possible, but not possible on system 7 mpu without cutting and jumping a few traces.

Thank you. Can you please point to a reliable source for the HN462532? Would appreciate it.

Funkward Tech is usually a good source for obsolete eproms.

ebay.com link: HITACHI 462532 2532 HN462532G UV EPROM 32Kbit x 5PCS

Thank you.

Created another quick test video using the pincoder adapter on a WMS 4 MPU (Flash). This is the LED, Blanking, CMOS19, RAM13, RAM16, and Displays tests

I'd really love to see some videos using these to troubleshoot non-booting boards. I have a couple I would donate to the person who was willing to do them