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OK, so I just got a Yamaha PSR-6 keyboard a few days ago for the YM2413 chip, and right now I'm looking at the schematics for the FM mod and I'm a bit confused. Do I simply wire the chip to existing components on the PCB (I don't have my SMS opened up at the moment so I can't tell) with some extra resistors and logic chips, or do I do something else?

ApolloBoy wrote

OK, so I just got a Yamaha PSR-6 keyboard a few days ago for the YM2413 chip, and right now I'm looking at the schematics for the FM mod and I'm a bit confused. Do I simply wire the chip to existing components on the PCB (I don't have my SMS opened up at the moment so I can't tell) with some extra resistors and logic chips, or do I do something else?

You would want to mount the components on a prototyping board - this is a small PCB with a copper layer on one side and holes drilled in it at .050" intervals. The idea is that you put the parts on the blank side, and the pins stick through on the copper side. You can then solder them securely in place, and use wire links to make all the connections. Last time I checked Radio Shack had something like this for under $5 US. I'd highly recommend socketing the YM2413 rather than soldering it in place, so if anything goes wrong during construction the YM2413 won't be damaged.

Afterwards you would solder some wires (as short as possible) from your board to the various points on the SMS PCB where the signals come from (D0-D7, etc.). In fact all the signals you need are on the expansion port, it may be worth it to get a card edge connector that fits the expansion port and then solder the wires from your PCB to the connector, rather than directly to the SMS PCB.

Charles MacDonald wrote

ApolloBoy wrote

OK, so I just got a Yamaha PSR-6 keyboard a few days ago for the YM2413 chip, and right now I'm looking at the schematics for the FM mod and I'm a bit confused. Do I simply wire the chip to existing components on the PCB (I don't have my SMS opened up at the moment so I can't tell) with some extra resistors and logic chips, or do I do something else?

You would want to mount the components on a prototyping board - this is a small PCB with a copper layer on one side and holes drilled in it at .050" intervals. The idea is that you put the parts on the blank side, and the pins stick through on the copper side. You can then solder them securely in place, and use wire links to make all the connections. Last time I checked Radio Shack had something like this for under $5 US. I'd highly recommend socketing the YM2413 rather than soldering it in place, so if anything goes wrong during construction the YM2413 won't be damaged.

Afterwards you would solder some wires (as short as possible) from your board to the various points on the SMS PCB where the signals come from (D0-D7, etc.). In fact all the signals you need are on the expansion port, it may be worth it to get a card edge connector that fits the expansion port and then solder the wires from your PCB to the connector, rather than directly to the SMS PCB.

Ah, I see. Now what could I use to make the connector for the expansion port?

Quote

Ah, I see. Now what could I use to make the connector for the expansion port?

I used this connector (no longer in stock) when I developed my SMS cartridge reader:

http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&sto...

It's designed to be mounted onto a circuit board, you'd probably want the kind with eyelets you can stick a wire through and solder in place.

There are a couple of hardware hackers here in Brazil who are about to release some PCBs with sockets for the FM chip, ready to be put inside the SMS - I'm already on the list to buy one, I know I could do it myself, but I'm lazy. I'll check if they'll accept orders from abroad and post any updates here, if anyone is interested.

We were also talking with these guys about making some flash carts, but I don't know if they can match the Tototek carts in price - I kind of doubt it.

Are you talking abour Projetos MSX? They know hardware, and they seem to have a supply of YM2413 chips.

No, they guys I'm talking about will be sourcing the YM from Projetos MSX (which is really one guy, Ademir Carchano, nice fellow). There are seems to be a source for a YM clone here in São Paulo, I'll have to check the details on that though. The board will be compatible with both the original YM and the clone - there seems to be a slight pin incompatibility between the two.

Quick update here: Since I'm still confused about the mod, I've decided instead to buy a Japanese SMS and the SMS>Mark III adapter from ToToTEK. I may consider selling the YM2413, since I spent about $40 on that keyboard I removed it from.

ApolloBoy wrote

the SMS>Mark III adapter from ToToTEK

http://www.smspower.org/forums/viewtopic.php?t=8714
Why was this thread unstickied? D:

Tom wrote

ApolloBoy wrote

the SMS>Mark III adapter from ToToTEK
http://www.smspower.org/forums/viewtopic.php?t=8714
Why was this thread unstickied? D:

Well, as much as I'd like to support SMS Power, I've noticed that the Gender Adapter isn't compatible with games like Rastan and Out Run, which pretty much breaks it for me. I'll probably email ToToTEK about their adapter and check out the compatibility on it. I'm guessing it doesn't work with Wanted, Walter Payton Football/American Pro Football and Rescue Mission.

jagripino, are you a signer of Canal 3? Does the SMS YM project belongs to there? Could you tell us (or me, through pvt) the link for that project's page, or its owner's email? I am very interested on this!

Author	Message
ApolloBoy Guest	About the FM mod Posted: Tue Jan 30, 2007 11:23 pm
ApolloBoy Guest	OK, so I just got a Yamaha PSR-6 keyboard a few days ago for the YM2413 chip, and right now I'm looking at the schematics for the FM mod and I'm a bit confused. Do I simply wire the chip to existing components on the PCB (I don't have my SMS opened up at the moment so I can't tell) with some extra resistors and logic chips, or do I do something else?

Charles MacDonald Joined: 28 Sep 1999 Posts: 1197	Posted: Thu Feb 01, 2007 5:04 pm
Charles MacDonald Joined: 28 Sep 1999 Posts: 1197	ApolloBoy wrote OK, so I just got a Yamaha PSR-6 keyboard a few days ago for the YM2413 chip, and right now I'm looking at the schematics for the FM mod and I'm a bit confused. Do I simply wire the chip to existing components on the PCB (I don't have my SMS opened up at the moment so I can't tell) with some extra resistors and logic chips, or do I do something else? You would want to mount the components on a prototyping board - this is a small PCB with a copper layer on one side and holes drilled in it at .050" intervals. The idea is that you put the parts on the blank side, and the pins stick through on the copper side. You can then solder them securely in place, and use wire links to make all the connections. Last time I checked Radio Shack had something like this for under $5 US. I'd highly recommend socketing the YM2413 rather than soldering it in place, so if anything goes wrong during construction the YM2413 won't be damaged. Afterwards you would solder some wires (as short as possible) from your board to the various points on the SMS PCB where the signals come from (D0-D7, etc.). In fact all the signals you need are on the expansion port, it may be worth it to get a card edge connector that fits the expansion port and then solder the wires from your PCB to the connector, rather than directly to the SMS PCB.

ApolloBoy Joined: 30 Jan 2007 Posts: 324 Location: San Jose, CA	Posted: Thu Feb 01, 2007 9:10 pm
	Charles MacDonald wrote ApolloBoy wrote OK, so I just got a Yamaha PSR-6 keyboard a few days ago for the YM2413 chip, and right now I'm looking at the schematics for the FM mod and I'm a bit confused. Do I simply wire the chip to existing components on the PCB (I don't have my SMS opened up at the moment so I can't tell) with some extra resistors and logic chips, or do I do something else? You would want to mount the components on a prototyping board - this is a small PCB with a copper layer on one side and holes drilled in it at .050" intervals. The idea is that you put the parts on the blank side, and the pins stick through on the copper side. You can then solder them securely in place, and use wire links to make all the connections. Last time I checked Radio Shack had something like this for under $5 US. I'd highly recommend socketing the YM2413 rather than soldering it in place, so if anything goes wrong during construction the YM2413 won't be damaged. Afterwards you would solder some wires (as short as possible) from your board to the various points on the SMS PCB where the signals come from (D0-D7, etc.). In fact all the signals you need are on the expansion port, it may be worth it to get a card edge connector that fits the expansion port and then solder the wires from your PCB to the connector, rather than directly to the SMS PCB. Ah, I see. Now what could I use to make the connector for the expansion port?

Charles MacDonald Joined: 28 Sep 1999 Posts: 1197	Posted: Thu Feb 01, 2007 10:43 pm
Charles MacDonald Joined: 28 Sep 1999 Posts: 1197	Quote Ah, I see. Now what could I use to make the connector for the expansion port? I used this connector (no longer in stock) when I developed my SMS cartridge reader: http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&sto... It's designed to be mounted onto a circuit board, you'd probably want the kind with eyelets you can stick a wire through and solder in place.

jagripino Joined: 21 Feb 2007 Posts: 3	Posted: Thu Feb 22, 2007 8:41 am
jagripino Joined: 21 Feb 2007 Posts: 3	There are a couple of hardware hackers here in Brazil who are about to release some PCBs with sockets for the FM chip, ready to be put inside the SMS - I'm already on the list to buy one, I know I could do it myself, but I'm lazy. I'll check if they'll accept orders from abroad and post any updates here, if anyone is interested. We were also talking with these guys about making some flash carts, but I don't know if they can match the Tototek carts in price - I kind of doubt it.

idrougge Joined: 01 Jan 2005 Posts: 360 Location: Stockholm, Sweden	Posted: Thu Feb 22, 2007 10:49 pm
	Are you talking abour Projetos MSX? They know hardware, and they seem to have a supply of YM2413 chips.

jagripino Joined: 21 Feb 2007 Posts: 3	Posted: Fri Feb 23, 2007 12:42 am
jagripino Joined: 21 Feb 2007 Posts: 3	No, they guys I'm talking about will be sourcing the YM from Projetos MSX (which is really one guy, Ademir Carchano, nice fellow). There are seems to be a source for a YM clone here in São Paulo, I'll have to check the details on that though. The board will be compatible with both the original YM and the clone - there seems to be a slight pin incompatibility between the two.

ApolloBoy Joined: 30 Jan 2007 Posts: 324 Location: San Jose, CA	Posted: Sun Jun 10, 2007 6:25 am
	Quick update here: Since I'm still confused about the mod, I've decided instead to buy a Japanese SMS and the SMS>Mark III adapter from ToToTEK. I may consider selling the YM2413, since I spent about $40 on that keyboard I removed it from.

Tom Joined: 16 May 2002 Posts: 1356 Location: italy	Posted: Sun Jun 10, 2007 12:55 pm
Tom Joined: 16 May 2002 Posts: 1356 Location: italy	ApolloBoy wrote the SMS>Mark III adapter from ToToTEK http://www.smspower.org/forums/viewtopic.php?t=8714 Why was this thread unstickied? D:

ApolloBoy Joined: 30 Jan 2007 Posts: 324 Location: San Jose, CA	Posted: Sun Jun 10, 2007 9:59 pm
	Tom wrote ApolloBoy wrote the SMS>Mark III adapter from ToToTEK http://www.smspower.org/forums/viewtopic.php?t=8714 Why was this thread unstickied? D: Well, as much as I'd like to support SMS Power, I've noticed that the Gender Adapter isn't compatible with games like Rastan and Out Run, which pretty much breaks it for me. I'll probably email ToToTEK about their adapter and check out the compatibility on it. I'm guessing it doesn't work with Wanted, Walter Payton Football/American Pro Football and Rescue Mission.

Wiseduck Joined: 21 Dec 2004 Posts: 66 Location: Belo Horizonte, Brazil	Posted: Tue Jun 12, 2007 11:16 pm
	jagripino, are you a signer of Canal 3? Does the SMS YM project belongs to there? Could you tell us (or me, through pvt) the link for that project's page, or its owner's email? I am very interested on this!

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