Recent content by MaRC

I ordered another A board, this time completely original, and I will use an oscilloscope to compare all the signals with the non-working one.

I bought 2 new ls374 from a trusted seller, but there's no sound at all. Previously, there was a looping sound almost every time I turned it on, but now it only happens once out of 15 times. What else should I change, 68000?

I also have an 87-in-1 board, and at startup, I get random sounds with any game. The Chinese guy soldered two different brands of ls374, and if I swap them, the sound completely disappears. Obviously, one of them is faulty, so I'll order two new ones.

I replaced the audio RAM and z80 with known good ones, but the result was the same: random sound or music at startup. If it's a random sound, it plays and then there's silence. But if it's a random music at the beginning, it continues playing until you reboot. So, the Z80 selects music from the...

Only one capacitor is missing, and it's in the analog part of the amplifier harness, but the problem is with the digital part.

CPS1.5 with poppulated audio part from donor board. But not all parts -Z80 has a 6 Mhz model installed.

I connect the board to the TV, the volume is not high and the amplifier does not heat up at all. The original radiator is on it. It's not a B board- I have 87 in 1, and I ran the same SF2 CE from it in different regions, as well as other games - the behavior is the same. There is a random sound...

I'll also write about the sound, maybe you can help. I bought a Street Fighter 2 CE kit on aliexpress. Upon arrival, it turned out that it was CPS 1.5 with the audio part transplanted from the donor cps 1.0. The sound worked fine at first, but disappeared after 10 minutes. If you let the board...

In Street fighter 2 CE, the test menu is enabled if you turn on the 8 dip C switch. Other games probably have taco menus too, I haven't checked.

The seller has B+C kits again. I took the kit and tried it anyway with my 92631C-6 - it's too wide and one of the capacitors on the B board does not allow it to be fully inserted into the slot.

If everything is fine, how long should a new battery or a fully charged battery last? I have 3 mv1cs, and the new battery runs out in about a day on all of them.

Currently, you can buy only B board on Aliexpress for $300. I have an original street fighter 2 CE kit with a 92631C-6 and a Dash Board with a 12 mhz processor. The seller on Ali doesn't seem to know much about what he's selling and says he's not sure if his B board will work with my A and C. I...

For neo geo, if you do not insert the cartridge, the test mode starts, where you can check both the buttons and the picture, and if you switch dipswitch, you can run the memory test. There is much less information about CPS1 on the Internet - is there something similar in it?

So after replacing the faulty capacitors on the board, how long does the battery last? The fact that the clock is reset is not terrible, it's bad that the neobios region and console mode are reset.

Almost all the boards that you order on aliexpress will be 1.5 versions with a homemade audio amplifier. I think if you write to the seller, they may not solder the amplifier, it's even easier for them. I wonder where they got so much 1.5 and why they don't sell them assembled with qsound and...