Search found 10 matches

by uprock7
Fri Apr 22, 2016 8:36 pm
Forum: Sound
Topic: Dual-YM2612 hardware synthesizer
Replies: 53
Views: 72935

Re: Dual-YM2612 hardware synthesizer

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 output...
by uprock7
Tue Apr 19, 2016 4:00 pm
Forum: Sound
Topic: Dual-YM2612 hardware synthesizer
Replies: 53
Views: 72935

Re: Dual-YM2612 hardware synthesizer

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 powe...
by uprock7
Mon May 20, 2013 3:40 pm
Forum: Hardware
Topic: Genesis/Mega Drive rebuild project
Replies: 17
Views: 29423

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 revi...
by uprock7
Sun May 19, 2013 5:22 am
Forum: Hardware
Topic: Genesis/Mega Drive rebuild project
Replies: 17
Views: 29423

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 - ...
by uprock7
Wed May 15, 2013 3:09 pm
Forum: Hardware
Topic: Genesis/Mega Drive rebuild project
Replies: 17
Views: 29423

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 sony ...
by uprock7
Tue May 14, 2013 7:54 pm
Forum: Hardware
Topic: Genesis/Mega Drive rebuild project
Replies: 17
Views: 29423

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 to...
by uprock7
Fri May 03, 2013 3:20 pm
Forum: Hardware
Topic: Genesis/Mega Drive rebuild project
Replies: 17
Views: 29423

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 ...
by uprock7
Thu May 02, 2013 5:39 pm
Forum: Hardware
Topic: Genesis/Mega Drive rebuild project
Replies: 17
Views: 29423

Genesis/Mega Drive rebuild project

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 us...
by uprock7
Wed May 01, 2013 6:57 pm
Forum: Hardware
Topic: A couple of questions about the genesis hardware
Replies: 3
Views: 4965

here are the pins for the 315-5345

http://wiki.megadrive.org/index.php?title=315-5345
by uprock7
Wed May 01, 2013 6:28 pm
Forum: Hardware
Topic: A couple of questions about the genesis hardware
Replies: 3
Views: 4965

A couple of questions about the genesis hardware

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 previo...