Search found 72 matches

by elseyf
Thu Jun 27, 2013 7:33 am
Forum: NES Hardware and Flash Equipment
Topic: Connect AY-3-8910 sound chip to FME-7 board
Replies: 126
Views: 89832

Re: Connect AY-3-8910 sound chip to FME-7 board

You need some capacitor where the 82nF caps are, but they don't need to be that size. I think you should be fine with anything you have lying around that's larger than 90pF and not electrolytic. I think you should hear a quiet 50Hz (PAL PPU; 60Hz otherwise) buzz on D and E, as I think Gimmick! writ...
by elseyf
Tue Jun 25, 2013 12:13 pm
Forum: NES Hardware and Flash Equipment
Topic: Connect AY-3-8910 sound chip to FME-7 board
Replies: 126
Views: 89832

Re: Connect AY-3-8910 sound chip to FME-7 board

Unfortunately, I don't have an oscilloscope. Therefore I tried the other method you suggested. I hoked the Audio in of the TV directly to the E and D points of the schematic. If I connect it, I can hear some scratching noise, which has, if I am not mistaken, some kind of rythm. It does not resemble ...
by elseyf
Tue Jun 25, 2013 11:00 am
Forum: NES Hardware and Flash Equipment
Topic: Connect AY-3-8910 sound chip to FME-7 board
Replies: 126
Views: 89832

Re: Connect AY-3-8910 sound chip to FME-7 board

I am getting frustrated :( I am trying to apply this mod to my spare FME-7 cart, but I don't get the extra sounds out of this thing. I hooked the AY-3 8910 up as the schematics show and also connected the '139 and '74 (i used 74hc74 instead of 74ls74, but that shouldn't matter) chips properly. I am ...
by elseyf
Sun Jun 23, 2013 11:30 am
Forum: GBDev
Topic: Help with DIY SD to 512KB SRAM cart by kgsws
Replies: 6
Views: 4684

Re: Help with DIY SD to 512KB SRAM cart by kgsws

that would be awesome if you could replace the nand gates with '139 because it takes a long time to figure out the wiring and it would not take as much space as the 4 7400 take. i am finished with wiring everything up, but it would not read my sd card :( it detects the sd card and tries to load it b...
by elseyf
Wed Apr 17, 2013 11:12 am
Forum: GBDev
Topic: is it possible to add a DS li-ion accumulator to DMG Gameboy
Replies: 2
Views: 4375

Re: is it possible to add a DS li-ion accumulator to DMG Gam

I wanted to have everything set up in the gameboy, so all the circuitry that would be needed to charge the battery being setup in the gameboy.
but your way would be a solution.
by elseyf
Sun Apr 14, 2013 1:10 pm
Forum: GBDev
Topic: is it possible to add a DS li-ion accumulator to DMG Gameboy
Replies: 2
Views: 4375

is it possible to add a DS li-ion accumulator to DMG Gameboy

I got an old gameboy that i am applying some mods to. I also have a broken Ds (screen cracked off) whichs battery i want to implant into my DMG. I am not very familiar with how accumulators work, So my question is if it is possible to add a DS accumulator to an old DMG gameboy and if yes, how it is ...
by elseyf
Sun Mar 24, 2013 1:18 pm
Forum: Newbie Help Center
Topic: Connecting two or more chips to PRG on NES PCB
Replies: 3
Views: 2237

Re: Connecting two or more chips to PRG on NES PCB

I dunno what you're asking, but to multiplex the chips with a 74LS139, you tie pins 16 (Vcc) and 1 (Side 1 enable.) to Vcc through a resistor to give whatever chip you're using enough amps. (Vcc is 5v, and I don't know how many milliamps a 139 needs.) Ground pins 2 through 8 (Input+outputs of the 1...
by elseyf
Tue Mar 19, 2013 1:49 pm
Forum: Reproduction
Topic: Help needed: Rockman 6-in-1 multicart hardware
Replies: 229
Views: 113676

Re: Help needed: Rockman 6-in-1 multicart hardware

After i got the time to work on this i am facing a problem: When i programmed the 27C322 in 8bit mode with 27C080 settings, all i get is scrambled data from the eprom when i verify the content of it. I tripple checked all my connections of the adapter i built myself and they actually match the pinou...
by elseyf
Sun Mar 17, 2013 7:25 am
Forum: Newbie Help Center
Topic: Connecting two or more chips to PRG on NES PCB
Replies: 3
Views: 2237

Connecting two or more chips to PRG on NES PCB

I was about to put Mega Man 4 Minus Infinity MMC5 on Hardware. I thought of using two 27c4001 chips rather than 27c801 because I got plenty of them lying around. I searched the Internet about this and came across a method to put up to six chips into SNES cart using '139 demultiplexer, and I also fou...
by elseyf
Sat Mar 02, 2013 1:24 pm
Forum: GBDev
Topic: Help with DIY SD to 512KB SRAM cart by kgsws
Replies: 6
Views: 4684

Help with DIY SD to 512KB SRAM cart by kgsws

I recently found this flashcart: http://zdoom.ic.cz/gameboy.html When you look at the schematic there is on the lower right some signs I can't decipher, so I need help. In the description it is said that there is 7400 logic connected to the cart, but I am not sure if the logic is the thing drawn in ...
by elseyf
Fri Mar 01, 2013 10:30 am
Forum: NES Hardware and Flash Equipment
Topic: Educational Computer Cart crashes and some games do not work
Replies: 16
Views: 5685

Re: Educational Computer Cart crashes and some games do not

@socram8888, if your cart is working, could you please check what my cart lacks or what the problem could be?
i would like to be able to use all the apps on this cartridge.
by elseyf
Wed Feb 27, 2013 6:43 am
Forum: NES Hardware and Flash Equipment
Topic: Educational Computer Cart crashes and some games do not work
Replies: 16
Views: 5685

Re: Educational Computer Cart crashes and some games do not

I recently got some supplies from china(took about 3 weeks to arrive).
I am about to build my own copyNES and a famicom adapter for my original NES.
I think it will take some time, but as soon as I am finished, I can post the dump of the cart.
by elseyf
Wed Feb 20, 2013 9:44 am
Forum: NES Hardware and Flash Equipment
Topic: Educational Computer Cart crashes and some games do not work
Replies: 16
Views: 5685

Re: Educational Computer Cart crashes and some games do not

Sry for taking that long to answer.
I think this cart uses PRG and VRAM, there is no WRAM on the carts board.
These are games giving scrambled graphics everytime I start these or they wont even start.
I would really like to dump this cart, but I dont have proper hardware to do so.
Any advice?
by elseyf
Sun Feb 17, 2013 5:49 am
Forum: NES Hardware and Flash Equipment
Topic: Educational Computer Cart crashes and some games do not work
Replies: 16
Views: 5685

Educational Computer Cart crashes and some games do not work

Some time ago, I found a cart on the bazar, which reveald itself not being a poorly made clone cart. It has some neat apps on it like a beatmania clone with songs and solitaire and such. If I put it in my famiclone, the cart starts up, but after some seconds, it crashes. After resetting like 100 tim...