Search found 4 matches

by huuanhuynh
Thu Apr 15, 2021 8:02 pm
Forum: SNESdev
Topic: Purpose of MAD-1 and 74139 logic for single ROM boards?
Replies: 27
Views: 36829

Re: Purpose of MAD-1 and 74139 logic for single ROM boards?

I have modify a card use 74139 decoder for 4 rom ic M27c801.
Cut A19 go to 139, and connect 5v to this pin on 139.
Use Y3 on second part of 139 for rom ic 4.
The card code SHVC-2A3B...
by huuanhuynh
Tue Mar 02, 2021 2:22 am
Forum: Test Forum
Topic: My Snes Reproduction
Replies: 0
Views: 13346

My Snes Reproduction

Make reproduction card this way look better! The two wiring pins have been cut in half. Please make sure it does not short circuit after soldering. (If it's short, pull it out a little.) https://forums.nesdev.com/download/file.php?mode=view&id=20210&sid=e75d8783d99c7c07ff0205053dd3b0ba https://forum...
by huuanhuynh
Thu May 28, 2020 10:19 pm
Forum: Test Forum
Topic: test
Replies: 5
Views: 54570

Re: test

Happy! It work. https://www.dropbox.com/s/wag7yjhsm75zc93/100725867_4442196392460865_5516309631086886912_n.jpg?dl=0 https://www.dropbox.com/s/w98h3sgh2ihh58f/101237728_4442304382450066_575552830576787456_n.jpg?dl=0 https://www.dropbox.com/s/gzhfveg1h1f4wj5/100947327_4442305719116599_5321414688188137...
by huuanhuynh
Wed May 27, 2020 8:36 pm
Forum: Test Forum
Topic: test
Replies: 5
Views: 54570

Re: test

Please!
How to disable broken blob?
https://obrazki.elektroda.pl/4281527100_1513255384.jpg
Can I use HY62256ALP-7 for replace?