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not really, some kinds of MCP have 2 dies inside, and the highest address actually is the driving pin of CS. the CS pin's input delay is much larger than other address pins', had better use for the highest address control(ram banking), not suitable for the lower address pins(random accessing) That ...

Do you know, with SRAM, you can put address lines and data lines in any order? ALWAYS you see special routing to keep them correct, nobody must realize it.

Oh wow, that's great! I didn't have very high hopes because I had not heard of an IR receiver ever going bad before. Maybe it was the capacitors somehow too but anyway thanks for letting us know it worked out.

Thanks for your help explaining lidnariq. I was looking at the wikipedia article actually. As soon as I see a control loop diagram I know from experience not to trust that I have clue what I am looking at. (Or that the person who drew it did either in most cases, lol). The way you explain it makes a...

This PDM stuff is pretty interesting but it is hard to wrap my head around the concept. From what I understand, when you put out 1-bit DAC pulses, if the DAC is high, it increases the resulting analog voltage, low it decreases, both at a defined rate, which differs from poor man's DAC because in tha...

Wow, I have never heard of delta-sigma DAC, either that or I forgot it completely. I have been reading up on it now. It looks like it is basically implementing a poor-man's PWM again but this time with known slopes and a feedback loop. I am wondering if there is a way to mitigate overhead in the mic...

Okay cool, thanks for the info. I am kind of playing with VRC7 lately and tossing around ideas, etc. I have been working on hacking Tetris to run on VRC7 and play FM music and making some progress on that. Not ready yet to commit to completing it but just having fun for the most part. https://youtu....

I think for standard OPLL you might be able to get "official" names off a Casio keyboard that uses it, perhaps? (Though, even there I think the named instruments tend to be custom ones. The built-in ones might only show up anonymously in accompaniment patterns.) As far as I knew from Wikipedia, onl...

Okay thanks for the advice. I do still have that PSS-140 stored away. If I can get ahold of it again some day I will sniff out its 100 patches for us with my oscilloscope. Kind of a side-question, some time ago I put names of the instruments into our VRC7 audio wiki page, based on a forum post from ...

I have been playing with some VRC7 stuff and just started poking at the custom patch. I know the built-in patches of the VRC7 and YM2413 from the siliconpr0n website: VRC7: | 00 01 02 03 04 05 06 07 | Name ---+-------------------------+---------------- 0 | -- -- -- -- -- -- -- -- | (Custom Patch) 1 ...

I retried the 2 tests on test 2 and the one test the light stays on and the other test there is no light (looks like I had got mixed up and done the same test twice) Silly me What's odd is when the console is switched on from cold, it sometimes it lets you play for a little while with limited contr...

Test 2 Light stays on (On both tests) That sounds worrying, and it's normally not possible at all, LEDs should light up only one way around. One explanation would be that you have repeated the same test twice, without swapping the pins. I think this is the most likely case because the Famicom opera...

I have not heard of http://www.buy-transistors.com before... It looks like they take PayPal, so that would be a safer route, but just be really careful, make sure you are on paypal's site in the URL before entering any username/password/etc. It would be a pretty safe bet that the part would be compa...

The resistor missing on your circuit board is probably normal. It sure sounds like a bad IR receiver based on test 3. To be sure, you should use your camera again to look at the controller's LED and the new red LED in test 3 at the same time (both in the same shot with your camera). If you can verif...

Thanks for telling us you got it working.