My GBA sp is using a 12mhz at the moment, anything higher than 15 and it won't work. CGB 24 and 12 both work fine. I'm pretty sure that palmertech said 69mhz was the fastest a GBA could take.mog123 wrote:palmertech, there is something called RC oscillator, By using a potentiometer and trimmer instead of a resistor and capacitor, that might work, though I'm not sure.
Anyway, has anyone tried going over 8? To something like 10-12?
Overclocking your GBA
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- eurddrue
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wallydawg wrote:I think we should check to see if you can withstand 220 voltschainfire95 wrote:220V I believe
Re: Overclocking your GBA
Sweet worked perfect for me. Gunna post a video in a minute.
Re: Overclocking your GBA
Actually it works fine except it only works if I start it overclocked. If I try to switch it over while turned on it wont work. Though if I start it overclocked it will switch to normal?
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Re: Overclocking your GBA
If I wanted to be able to underclock it, would a 3.5 mhz crystal be good? I plan to use a switch that let me choose three different options (4 mhz, 8 mhz and 3.5 mhz)
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Re: Overclocking your GBA
I'd do 2mhz, because 3.5 won't make it slow enough, it will just slow it enough to mess with your timing.Snip3rFire wrote:If I wanted to be able to underclock it, would a 3.5 mhz crystal be good? I plan to use a switch that let me choose three different options (4 mhz, 8 mhz and 3.5 mhz)
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wallydawg wrote:I think we should check to see if you can withstand 220 voltschainfire95 wrote:220V I believe
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Re: Overclocking your GBA
Thanks for that pointer, should I use ebay to buy, or are there better sites? Sorry, I am very new to hacking in general... and I'm british =)
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Re: Overclocking your GBA
I use ebay and get 25+ crystals for cheapSnip3rFire wrote:Thanks for that pointer, should I use ebay to buy, or are there better sites? Sorry, I am very new to hacking in general... and I'm british =)
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wallydawg wrote:I think we should check to see if you can withstand 220 voltschainfire95 wrote:220V I believe
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Re: Overclocking your GBA
Size really only matters if you're having troubles fitting it into the case There should be plenty of room though in the GBA.
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wallydawg wrote:I think we should check to see if you can withstand 220 voltschainfire95 wrote:220V I believe
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Re: Overclocking your GBA
Snip3rFire, I wouldn't recommend trying to use the larger kind of Crystal you linked to, which has 4 contacts on the bottom. I seem to remember reading somewhere that the ones with 4 leads on the bottom have some other circuitry inside so you can't use them the same way as the standard 2 lead types.
The "metal can" style crystals should only have 2 leads if you are going to use them to overclock a GBA. The surface mount crystal in the GBA has 4 contacts, but they are internally connected so that top contact on the right side is the same as the top contact on the left side (and the same for the bottom).
The small one would work fine. Just remember that if you want to underclock using a crystal less than the original 4.19MHz, you can not connect the new crystal in parallel with the original. You will need to remove the original crystal from the circuit board, and connect your crystals and switch directly to the board contacts.
The "metal can" style crystals should only have 2 leads if you are going to use them to overclock a GBA. The surface mount crystal in the GBA has 4 contacts, but they are internally connected so that top contact on the right side is the same as the top contact on the left side (and the same for the bottom).
The small one would work fine. Just remember that if you want to underclock using a crystal less than the original 4.19MHz, you can not connect the new crystal in parallel with the original. You will need to remove the original crystal from the circuit board, and connect your crystals and switch directly to the board contacts.
Overclock your GBA
http://forums.benheck.com/viewtopic.php?t=25718
http://forums.benheck.com/viewtopic.php?t=25718
Re: Overclocking your GBA
Hey thanks a lot for this guide, I overclocked my GBA today with an 8 MHz crystal, it works perfectly.
I know that it doesn't work if you switch speeds while playing a game but I just had to try, I first fired it up at normal speed and switched the button, nothing happened, the game didn't screw up or anything so I could just play it at normal speed.
Then I started it up at fast speed, played a little while and listening to some in-game music (it was enjoyable) and then switched it to the normal speed while playing, the game started playing at the normal speed without having to turn it off, the game didn't screw up so I was pretty satisfied with the results.
It works from fast to normal but not from normal to fast.
the game was Mario & Luigi Superstar Saga in case you want to know.
I know that it doesn't work if you switch speeds while playing a game but I just had to try, I first fired it up at normal speed and switched the button, nothing happened, the game didn't screw up or anything so I could just play it at normal speed.
Then I started it up at fast speed, played a little while and listening to some in-game music (it was enjoyable) and then switched it to the normal speed while playing, the game started playing at the normal speed without having to turn it off, the game didn't screw up so I was pretty satisfied with the results.
It works from fast to normal but not from normal to fast.
the game was Mario & Luigi Superstar Saga in case you want to know.
here
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Re: Overclocking your GBA
after a while of playing on my overclocked GBA I found it a pity that I couldn't change the speed while playing, only from fast to slow and not the other way. Don't expect a real solution this!
I wasn't really looking for an answer I just got the idea when I was playing mother 1+2 and I thought: "Maybe if I change the speed to fast if the game is in sleep mode!?"
so thats what I did, turned my GBA to normal speed, launched the sleep mode and hit the switch.
... well, it kinda amazed me, the game played twice as fast as normal (its a succes), so it is a bit possible to change the game speed, if your game enables sleep mode, without having to shut down the system completely.
Although I didn't try with other games but I'm almost sure that will work on other games too.
It made my day.
I wasn't really looking for an answer I just got the idea when I was playing mother 1+2 and I thought: "Maybe if I change the speed to fast if the game is in sleep mode!?"
so thats what I did, turned my GBA to normal speed, launched the sleep mode and hit the switch.
... well, it kinda amazed me, the game played twice as fast as normal (its a succes), so it is a bit possible to change the game speed, if your game enables sleep mode, without having to shut down the system completely.
Although I didn't try with other games but I'm almost sure that will work on other games too.
It made my day.
here
<a href="http://www.nerdtests.com/ft_weird.php?im">
<img src="http://www.nerdtests.com/thetester/imag ... p?val=9351" alt="What is your weird quotient? Click to find out!"> </a>
<a href="http://www.nerdtests.com/ft_weird.php?im">
<img src="http://www.nerdtests.com/thetester/imag ... p?val=9351" alt="What is your weird quotient? Click to find out!"> </a>
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Re: Overclocking your GBA
Hey, sorry to bump a month old topic, but I had a thought about this issue with in-game speed switching.
What if there was a way to do it with a halt switch. I remember using one of those in my overclocked genesis to change speeds on the fly. You'd turn the game on with normal speed, flip the halt switch on, adjust the speed, then flip the halt switch off.
Perhaps there's a way...
What if there was a way to do it with a halt switch. I remember using one of those in my overclocked genesis to change speeds on the fly. You'd turn the game on with normal speed, flip the halt switch on, adjust the speed, then flip the halt switch off.
Perhaps there's a way...
Re: Overclocking your GBA
I can't manage to do this mod. Tried for 2 hours. different clocks. I mean - i've got everything soldered(tried resoldering 4 times). I start it up, and hell naw, it won't overclock.