Any custom devices using the Hi-Speed Parallel Port?

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Apache Thunder
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Any custom devices using the Hi-Speed Parallel Port?

Post by Apache Thunder » Sun Sep 08, 2013 4:54 am

Ok I've looked around and it seems the only device ever used on this port was the official GBA device for playing GBA games on the GameCube. The pinout of this port was also available via an easy Google search and is documented to some degree.

So I'm curious if anyone has ever attempted or will attempt to use this port for a custom device like a hard-drive/SD adapter? This port has the most bandwidth available to it and might support DMA (though I am no coder/hardware expert to say for sure).

Is this port accessible at all from homebrew software? If not then I suppose booting/accessing anything from this port would be impossible. Though it would be interesting if someone attempted to build an "expansion pack" like device to extend the GC's memory in a manner similar to the N64's expansion pack. The port is on the same bus as the A-Ram so it would run at the same speed as the A-Ram which is what I think most homebrew uses for memory space correct?

I assume the other two serial ports have a much slower access speed and might not be much better then using the memory card slot. This is just judging by how horridly slow the BBA is on Serial Port 1. A ISO dump from Swiss is super slow through the BBA. It's a wonder people ever had to put up with this thing back in the days of the PSO Exploit.

Someone fill me in on this. It would be interesting if someone could use this port for something. :D
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manic.blood
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Re: Any custom devices using the Hi-Speed Parallel Port?

Post by manic.blood » Tue Sep 10, 2013 11:11 am

Yes that would be interesting to give the cube a bit of a kick with more power. It could be potential useful for some of the CPU intensive media players and cubeSX and cube64 for example
CathodeRayBlues
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Re: Any custom devices using the Hi-Speed Parallel Port?

Post by CathodeRayBlues » Mon Mar 12, 2018 2:12 am

Apache Thunder wrote: Is this port accessible at all from homebrew software? If not then I suppose booting/accessing anything from this port would be impossible.
:D
Actually, yes there has been some homebrew alternatives to the Gameboy player software called GBI. Other homebrew should be able to access it.
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emu_kidid
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Re: Any custom devices using the Hi-Speed Parallel Port?

Post by emu_kidid » Fri Mar 16, 2018 7:50 am

CathodeRayBlues wrote:
Apache Thunder wrote: Is this port accessible at all from homebrew software? If not then I suppose booting/accessing anything from this port would be impossible.
:D
Actually, yes there has been some homebrew alternatives to the Gameboy player software called GBI. Other homebrew should be able to access it.
Closed source :P
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Streetwalker
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Re: Any custom devices using the Hi-Speed Parallel Port?

Post by Streetwalker » Fri Mar 16, 2018 11:53 am

The GBI source code is completely unnecessary to access the high speed port though. It's literally the same as ARAM.
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