1,649 Jul 30, 2011 2:48 am
Re: What Cartridge Do You Use? (19 replies, posted in Nintendo Handhelds)
1,650 Jul 28, 2011 9:26 pm
Re: Why can't I log into 8bc!?!?!?!?!?!? (4 replies, posted in General Discussion)
It's actually staff@8bc.org. Also, CM.org isn't the 8bc helpdesk.
1,651 Jul 25, 2011 10:17 pm
Re: $1,000 gameboy micro? (7 replies, posted in General Discussion)
Money laundering?
More like shill bidding/stat raising is my bet. Look at the bid history. First 11 bets where g***s raises the bid about $100 at a time. This does not even include auto-bidding, so it's not even that he set a maximum auto-bid and then someone kept bidding higher and higher. These are actual bids made by that mo-fo. And then a final bid by 8***p. (Names are hidden as you can see.) I'll bet that someone whose name starts with 8 and ends with p will start making a scam auctions within days.
Seriously, someone should report this to their customer service. I don't have an eBay account, but feel free...
1,652 Jul 24, 2011 3:40 am
Re: EMS cart holding a save without a battery present (7 replies, posted in Nintendo Handhelds)
^ Makes total sense.
Now, find out why my XBOX controller was working without being connected to the console
Because it's a wireless control with a battery and radio communication?
1,653 Jul 24, 2011 12:39 am
Re: EMS cart holding a save without a battery present (7 replies, posted in Nintendo Handhelds)
I can tell you exactly what's going on.
There are two red boxes in the image.
The upper right one is a diode array with two diodes in the same package. They both have the cathode connected to the bottom pin. The two upper pins are the anodes, ie where the voltage "enters" to speak simply. The right one of those is connected to the positive terminal of the battery and the right one to the 5V on the cartridge slot and USB supply. This way both the sources can power the SRAM chip without interfering. Otherwise, the +5V from the Gameboy/USB would destroy the battery and the battery would discharge through the other circuits on the board when there was no external power.
The chip marked ISSI is the SRAM chip. It's a really low power RAM module that will draw almost no current.
The other part of the magic secret sauce is the capacitor C12. It's there mainly to smooth out the power supply when turning on or off the external power. A capacitor is commonly compared to a bucket that can hold an electrical charge. When you turn on the external power, instead of going directly from ~3V from the battery to 5V, the power goes (relatively) slowly from one voltage level to the other. Same thing if you turn off the power. Instead of going right down to ~3V, the voltage slowly drops as the capacitor gets discharged.
Same thing applies even if there's no battery: the charge drops slowly from 5V to 0V as the SRAM circuit consumes current. Until the voltage goes below the threshold of what the SRAM circuit needs to hold the data, the data is retained.
This reminds me of something that happened to my mother. She discovered that the remote control to her TV worked for a short while after she had pulled out the batteries, and it also has a capacitor for similar reasons. She thought the remote control was magical/haunted.
1,654 Jul 23, 2011 7:10 pm
Re: Keytar+LSDJ?? (7 replies, posted in Nintendo Handhelds)
If the keytar has MIDI out, you can use it with ArduinoBoy + mGB. You could use LSDj as well, but it isn't really the preferred way of doing it in my opinion. (Instead use two cartridges and two 'boys.)
1,655 Jul 22, 2011 8:30 am
Re: DMG Backlight kit problem (13 replies, posted in Nintendo Handhelds)
This happens when one of the display connectors, the flat "cables" soldered to the board, are broken or have come loose. It's embarrassing, but I can't make out in my head which connector is supposed to give those vertical lines. I suggest you do the following. I actually took these pictures just the other day for my latest blog post.
First look at the brown cable at the bottom of the LCD. Look for breaks in the plastic. That means you're basically screwed. Next step is to reflow the solder. You probably want to do this with a fine tip iron and a steady hand. Also, probably turn the power off while doing this in case you get an accidental shortcut. Now, go over the soldering points one by one and just touch each joint quickly. If everything looks ok, turn it on and see if the problem is gone.
If not, proceed to the green connector under the screen. (Actually, they're both, both brown and green on opposite sides.) That's in the lower right side of this image. This one is a little bit trickier since there's nothing to hold it in place. (The other connector is attached with a piece of metal and a screw near this piece of metal) Do something like hold down the connector to the board with your index finger, and hold the screen up with our middle finger and place the remaining finger on the other side of the screen. Be careful at all times. Now go through these solder joints as well. Actually, start with just the leftmost one, and try turning the 'boy on one time. Especially the leftmost one takes a lot of strain when lifting the display as you do in the backlighting procedure.
Good luck. You'll need it...
Also, as others have pointed out, it seems like you put the panel upside down, even though that has nothing to do with the other problem. It will just give you a darker screen filled with little dots. (Those are actually reflectors to distribute the light evenly across the panel.)
1,656 Jul 20, 2011 10:25 am
Re: FOR SALE: PROSOUND BACKLIT GAMEBOY WITH LSDJ CART (24 replies, posted in Trading Post)
Ok, let's look at the worst case prices for getting these things elsewhere:
"New" nofinite plain DMG with backlight: $90
New link cable: $5
New EMS 64M USB cartridge (even if that's not even what you're selling...) $40
Little Sound Dj license: $10 donation because you really like Johan Kotlinski
Carrying case: Erm... let's say $30 because the case is really that rad?
So, the privilege of owning stuff you have owned, $25?
1,657 Jul 19, 2011 6:20 pm
Re: EMS 64mb cart page switch (10 replies, posted in Nintendo Handhelds)
ROMs: http://www.personal.triticom.com/~erm/GameBoy/
The way you do create them is by merging files together. In Windows:
copy /b menu.gb + 1.gb + 2.gb out.gb
In Linux etc.:
cat menu.gb 1.gb 2.gb > out.gb
You basically smack them together to one big file.
However, there are two issues when using this with LSDj.
1) ROMs must be aligned to their size because of how the logic chip handling thesethings is working. For example, if the ROM is 128 kBytes big, it must be placed on an multiple of that size, like 128 kBytes, 256 kBytes, 224 kBytes and so on. You can't place it 64 kBytes into the combited ROM image, for example. This creates a problem for LSDj as it has to be placed either at the very start, where the menu ROM is supposed to be, or at the 1 MByte, 2 MByte or 3 MByte marks. The latter option is problematic because the existing menu ROMs don't have a clue they should look so far into the ROM, unless you just happen to fill up exactly the right space. (They stop looking when they don't see any more ROMs.)
2) SRAM management. The existing menu ROMs rely on being able to save the SRAM contents to the upper portions (32 kByte+) of SRAM. This is fine for games, but for LSDj, it will interfere with LSDj's file system. I think I have a solution for that too.
1,658 Jul 19, 2011 11:19 am
Re: EMS 64mb cart page switch (10 replies, posted in Nintendo Handhelds)
Actually, I don't have a fix for this. I think I recall someone managing to look it to one of the pages by removing that capacitor and maybe adding a resistor. Can't find the info on that now, though. If I had that info (or if I'll get time to sit down and investigate the cartridge) I could give you some more advice. You could just stick the same ROM onto both the pages and be done with it. That of course only gives you one ROM, unless...
Actually, the thing with EMS cartridges (buth these 64M ones and the earlier blue 32M) is that they have multi-ROM support. (The 64M cart is really just two 32M carts with a switch.) This means you can basically fill up the memory up to 32MBit with as many ROMs you can fit. For this you need a menu ROM which will do the switching.
There are already menu ROMs available, however these don't play well with LSDj for several reasons. I'm intending to make my own menu ROM to fix these problems. When/if I get that fixed, that will probably offset the fact that you only have one page available, since you're not limited to just one ROM anymore.
1,659 Jul 18, 2011 4:01 pm
Re: BBCode (Spoiler) (4 replies, posted in Bugs and Requests)
What? Random color? Why not just choose a random color and use the regular color tag?
1,660 Jul 13, 2011 6:41 pm
Topic: Digimancy - modular synth, meet random digital electronics (2 replies, posted in General Discussion)
1,661 Jul 13, 2011 3:35 am
Re: This is what I've been up to (6 replies, posted in General Discussion)
If that's you, then this is Nullsleep?
1,662 Jul 12, 2011 10:51 am
Re: Why so few new MOD/XM artists? (155 replies, posted in General Discussion)
4mat: The ready-made samples part is of course only for non-chip modules/non-chip samples. As Lazerbeat mentioned as an advantage, "Infinite range of sounds available."
Also, I draw my LSDj triangles, mainly because LSDj produces a bandlimited triangle that's not stepped in 1-step increments, and also because I want my triangle to start at the bottom of the range, not middle, so I don't get that big DC offset change at the beginning.
1,663 Jul 12, 2011 9:35 am
Re: Why so few new MOD/XM artists? (155 replies, posted in General Discussion)
cTrix: You're right in both the things you are saying, but you're missing my point. I wasn't trying to disprove Lazerbeat but answer the question why things ended up the way they are today, i.e. how the general populace perceives things.
1,664 Jul 12, 2011 6:29 am
Re: DMG linkable with SP? (14 replies, posted in Nintendo Handhelds)
The link port is identical to that on GBA. It's compatible with the GBC link port. (It has a slightly different shape from GBC, but that's only so Nintendo could design GBA-only plugs if they wanted. No problem!)
What SP doesn't have is a direct headphone output. You need to plug a special adapter into the combined charging port/headphone for that. Prosound is probably a PITA unless your first name is Ralph and your last name is Tyler...