Search results for query: *

Found the culprit (other than my self for a lack of quality control :) ) it was the eeprom in U6 (U10) a 27C801 who was faulty (I don't know for what reason since I've checked it good once after burning it) Replaced it with a new one and my cart is working good 🙂 Thanks for the help

CPU code EPROMs located at U8 and U10 : checked = Ok Region free modded BIOS : checked = Ok I'll double check the voltage regulator (5v to 3.3v) after work since last time I mesured 3.9v (I don't know why) can someone point me to the right spots to connect my regulator to (5v and GND) ?

I'm trying to convert a Gals S2 (Rom-4 board) into Cyvern following the instructions. Everything was fine until this screen where the game seems to bé stuck into. Did I miss something ?

Ok then I'll keep you posted once I found a replacement

IC22 is fine, socket is fine (continuity checked) Using a probe I have even low or no signal on all the data lines (input and output) I mesured the VCC and it's fine (got lower than 5V at first but then I adjusted to 5.00V) I mesured the 5V in other locations on the cartridge and it was fine...

Just to let you know, I got no chance, 9 out of 10 IC's were bad. I received new IC's and tested them : everything works great. So the adapter is good I just wasn't lucky I got a bad batch of new 26L6420

I did it with same result, but it was late and I was tired, I'll try it again tonight and double check everything.

I tried with a japanese bios only (23605C): same issue I don't have a cartridge rom test (I'll try to make one if easy) Yes, the dude replaced all 9 IC's : same issue

I already have a double bios (Jap/US) I'm on Naomi 2 Does the game need a specific bios ? No bent pins btw

Hi, I have an issue with my Zero Gunner 2 cartridge. The cart is in very good shape, no corrosion, no cut traces... Everything looks fine. When I insert it in my Naomi mobo I have an error 01 The game name doesn't show up in test mode. I took the IC22, dumped it, compare it to MAME and it...

The 4th 26L6420 in this batch seems OK 🧐 Blank check : ok Erase : ok Programming : ok So problem is with the quality of the chips that I got from Aliexpress Thanks for the heads up 😌🙏🏻

I checked the pin connexion continuity with a multimeter and it was : OK I downloaded the lastest program for the 610p : OK I tried another 26L6420 from the ones that I bought from aliexpress : same issue Here are some print screens of what I got on screen I'm used with T48 and GQ-4X...

I double checked the pins connection with a magnifying glass, no visible issues I'll try another chip

Ok, good to know. I already ordered a New batch of 26L6420, I'll test when I receive them The ones that I have, when I read them I have 00 in some first rows of offset then it change in FF until the end Could it be something else that I'm doing wrong ? Thanks

Hi, I'm the happy new owner of a Xeltek Superpro 610p. I went the cheap way for buying adapters and I choose one from Aliexpress. Now that I want to program some MX26L6420MC I have errors while blank check or erasing or programming Do you think that my problem come from the adapter or the IC...

Thanks for the tip, changed the supercap in position CC18 but no change :( still the same issue, sound level stuck at 0

Yes, did it with button UP and Button Down Also checked if the volume buttons were OK (and Yes, they are ok)

Hi guys, I have an a-board with no sound, the volume is tuck at 0 and using the Switch buttons have no effect on sound. There are no bad traces, and sound used to work fine on this a-board. I changed the LS374 in 2N, 2P, 2R, 2S, 3S and 4S, but no result :( My next step is to change the LS245 in...

Yes, of course :) Here is your comment : so basically I used the following : I installed MAME, then in CMD I went to the MAME folder and I executed jedutil.exe as follow : jedutil.exe -convert va22b.1a va22b.jed Then burn the va22b.jed into a GAL16V8B and place it in 1A position in your PCB...