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All that makes so much more sense now, which means I have a new round of questions! Im toying with the idea of using YM3438's instead.

1) Is the voltage divider resistors not needed on the MOL/MOR of the 3438 ? Just the pulldown resistor and the coupling cap?

2) Would you use a LM715 with the ...

Hey all, I have a teensy2.0++, a few YM2612, and some 7.68Mhz dip-14 oscillators on the way. Im looking to build something pretty similar and I have a few questions.

1) Why is there a dual power source for +5V and Vdd? Does the YM2612 a.Vcc use a lot of power?
2) Could the teensy's +5v from usb ...

i feel like there is a nice aesthetic around plugging in a game and just playing. now i put a game in my ps3/xbox360, navigate and tell the console to play the game, then it connects to check for updates, installs updates if applicable, and then i get to play the game. ill probably have a board ...

1 - It's annoying that the PAUSE button is on the console instead of the controller. It might be an inherited console design fault, on how the system is halted or something, but it's probably worth a quick check just to see how much would need to be changed to make it work from the controller.
2 ...

i just bought some of the VDP's and the 315-5402's last night :p. id love to build a 3 in 1, but first things first, rebuild the genesis and see what improvements i can make.

im thinking:
100% game and accessory compatibility
crystal clear stereo sound from the YM2612
US/JAP switch
replace the ...

oh man, thanks for the link to new york semi. i couldnt find the VDP or the Bus arbitrator and I/O ics and i was afraid i would have to emulate them using a microcontroller.

the sega cd bios has been somewhat reverse engineered, i believe? it would be awesome to build in sega cd, but im not going ...

for the first build id rather stick to just composite/svideo out. im not entirely familiar with the genesis VDP or HDMI encoding IC's to really make it happen right now. if anything, id like to add a SD card slot for loading software. maybe on a v2 or v3 HDMI might be a possibility. But getting the ...

I was recently inspired by low_budget's super 8 NES rebuild project and Id like to rebuild a genesis myself. After spending time doing research over the last few weeks, I believe I would have to base my design off V0/V1/V2 model 1 designs because I dont believe I can source any of the ASIC's sega ...

here are the pins for the 315-5345

http://wiki.megadrive.org/index.php?title=315-5345

Hey all, im new here and a genesis/megadrive noob. Im still learning the hardware and I have a few questions.

1) What does the SEGA 315-5345 IC do? Im guessing since it has the EDClk pin as well as a HSYNC pin it helps convert the video to PAL and NTSC formats.

2) Did the motherboard versions ...