Search found 639 matches

by Ben Boldt
Thu Nov 26, 2020 11:19 pm
Forum: NES Music
Topic: My attempt at making a very good song.
Replies: 3
Views: 642

Re: My attempt at making a very good song.

I think it is hard to judge it without context. If it was to be a background song to a level in a game, it would probably be a little too crazy and repetitive. But maybe played during a short intermission/cutscene, some character tripped and rolled down a big hill in a funny way for example, it coul...
by Ben Boldt
Tue Nov 24, 2020 2:20 pm
Forum: NES Hardware and Flash Equipment
Topic: Famicom Network System (aka Famicom Modem) Investigations
Replies: 30
Views: 30683

Re: Famicom Network System (aka Famicom Modem) Investigations

I spent the last few days tracing out the expansion audio circuitry in the modem module. I am more of a digital/firmware guy; any analog wizards out there care to have a look and speculate as to what the 5A18 pins 61, 62, 63 do? Could these be mute and the 2 tones generated for dialing? Definitely k...
by Ben Boldt
Fri Nov 20, 2020 2:40 pm
Forum: NES Hardware and Flash Equipment
Topic: How to design the PCB of PIC18f2520 microcontroller
Replies: 9
Views: 372

Re: How to design the PCB of PIC18f2520 microcontroller

I'll be honest, I will probably keep doing it that way I used to. I won't tell anyone else to do it that way anymore through. Thanks for the advice.
by Ben Boldt
Fri Nov 20, 2020 2:08 pm
Forum: NES Hardware and Flash Equipment
Topic: How to design the PCB of PIC18f2520 microcontroller
Replies: 9
Views: 372

Re: How to design the PCB of PIC18f2520 microcontroller

That's like people who say you don't need bypass caps because "it worked for me". I say that on purpose to show clearly that I don't have anything to back up my statements, even encouraging to look up the datasheet. It's just my experience, making sure you know that and not hiding anything. I never...
by Ben Boldt
Fri Nov 20, 2020 1:57 pm
Forum: NES Hardware and Flash Equipment
Topic: How to design the PCB of PIC18f2520 microcontroller
Replies: 9
Views: 372

Re: How to design the PCB of PIC18f2520 microcontroller

That's like people who say you don't need bypass caps because "it worked for me". I say that on purpose to show clearly that I don't have anything to back up my statements, even encouraging to look up the datasheet. It's just my experience, making sure you know that and not hiding anything. I never...
by Ben Boldt
Thu Nov 19, 2020 9:26 pm
Forum: NES Hardware and Flash Equipment
Topic: Super Mario Bros (2 players hack) repro hell
Replies: 3
Views: 320

Re: Super Mario Bros (2 players hack) repro hell

I think I figured it out finally. :arrow: krzysiobal must have escaped from Sunsoft.
by Ben Boldt
Thu Nov 19, 2020 9:04 pm
Forum: NES Hardware and Flash Equipment
Topic: How to design the PCB of PIC18f2520 microcontroller
Replies: 9
Views: 372

Re: How to design the PCB of PIC18f2520 microcontroller

Sorry but I have to disagree with that completely aquasnake. First of all, I advise against the diodes because then the voltage getting to the PIC micro will be less by a diode drop. You could check the datasheet to be sure but 99.9992% chance the regulator doesn't care if its output gets powered wi...
by Ben Boldt
Wed Nov 18, 2020 8:06 pm
Forum: NES Hardware and Flash Equipment
Topic: Brainstorming using Microcontroller as mapper
Replies: 14
Views: 2993

Re: Brainstorming using Microcontroller as mapper

I may have to procure a demo board of said H7 series ST micro... ;) Heck, maybe I have one, I should dig around first.
by Ben Boldt
Wed Nov 18, 2020 7:58 pm
Forum: NES Hardware and Flash Equipment
Topic: Weird thing happened after washing a NES clone PCB
Replies: 12
Views: 949

Re: Weird thing happened after washing a NES clone PCB

Nit: the "whitening" toothpastes work exactly by scraping the bone off your teeth. That's not true. They don't make toothpaste or toothbrushes that wear down your teeth, at least not in USA. When it comes to cleaning stuff though, I recommend the cheapest tube of white toothpaste, not anything fancy.
by Ben Boldt
Tue Nov 17, 2020 7:54 pm
Forum: NES Hardware and Flash Equipment
Topic: Weird thing happened after washing a NES clone PCB
Replies: 12
Views: 949

Re: Weird thing happened after washing a NES clone PCB

I have had really good luck with the white toothpaste on edge connectors. Just scrubbing for a minute or so on each side removes that soft layer of oxidation. White toothpaste is somewhat abrasive (probably the baking soda), but certainly not the point where it would ever remove enamel from your tee...
by Ben Boldt
Tue Nov 17, 2020 7:30 pm
Forum: NES Hardware and Flash Equipment
Topic: Brainstorming using Microcontroller as mapper
Replies: 14
Views: 2993

Re: Brainstorming using Microcontroller as mapper

Hmm... the MDMA on the STM32H7 micros is theoretically turing-complete, I suppose? I have never used any DMA features of these chips before, maybe there is more to it than I realize?? I wasn't sure on how the speed of DMA based on pin change notification would compare with an interrupt. I guess the...
by Ben Boldt
Tue Nov 17, 2020 9:51 am
Forum: NES Hardware and Flash Equipment
Topic: Brainstorming using Microcontroller as mapper
Replies: 14
Views: 2993

Re: Brainstorming using Microcontroller as mapper

I did try a bit-bang loop as an experiment and it was considerably faster. I didn't measure it but I am thinking it would be fast enough. The problem is that if you bit-bang, the micro can't go off and do anything else, such as generate expansion audio. I really spent some time thinking of how to us...
by Ben Boldt
Tue Nov 17, 2020 9:35 am
Forum: NES Hardware and Flash Equipment
Topic: Weird thing happened after washing a NES clone PCB
Replies: 12
Views: 949

Re: Weird thing happened after washing a NES clone PCB

I take it that wouldn't work very well for a PCB with a battery though, as it would make things short-circuit. Yes very good point, you will want to remove any batteries before washing a circuit board. That's also a great time to test and replace the battery as necessary. For edge connectors, I don...
by Ben Boldt
Mon Nov 16, 2020 10:02 pm
Forum: NES Music
Topic: I finally got a way to fix the triangle channel bug in Ufouria!
Replies: 14
Views: 1079

Re: I finally got a way to fix the triangle channel bug in Ufouria!

lidnariq wrote:
Mon Nov 16, 2020 9:59 pm
Here's the thread about it: viewtopic.php?t=20308
Oh my god that is totally crazy, I never would have guessed. WOW
by Ben Boldt
Mon Nov 16, 2020 9:55 pm
Forum: NES Music
Topic: I finally got a way to fix the triangle channel bug in Ufouria!
Replies: 14
Views: 1079

Re: I finally got a way to fix the triangle channel bug in Ufouria!

Tangential, but did anyone make a patch to fix the DPCM bit order? I haven't heard of this; do you mind describing what is wrong? I am intrigued how Sunsoft DPCM bass could be improved in some way. Edit: Found this, NO WAY, not sure I believe it yet: https://twitter.com/moviemovies_one/status/12846...