[channelf] Re: New Bios
- From: "Sean Riddle" <seanriddle@xxxxxxx>
- To: <channelf@xxxxxxxxxxxxx>
- Date: Sun, 17 Jun 2007 16:05:53 -0500
Hey guys-
Somewhere around here, probably in a box (I haven't used it for 3 or
4 years, but I don't think I cannibalized it), I have a cart dumper that can
also read the DIP PSUs, and can dump the contents out the serial port or
save them to a serial EEPROM on the dumper. Some people sent me their
carts, and I sent the dumper to a couple of guys to get the last remaining
carts. I'd recommend sending the chip to me, since I'm familiar with the
dumper and would make sure not to damage the chip, but if that's not an
option, I can send the dumper. It requires a 12V DC power supply. I sent a
"wall-wart" with it when I sent it out before, but that's for US mains.
The cart dumper uses a PIC 16F84; I'm happy to send the source code
if someone wants to build their own. You've got to toggle the Phi, Write
and ROMC3 signals repeatedly to dump the contents to the data bus one byte
at a time.
Check out fpgaarcade.com. MikeJ has put many old consoles and
arcade video games into FPGAs. I'm sure the entire Channel F and all the
carts would fit into one FPGA with no problem. But someone would have to
design the F8 chips, since I haven't seen those cores anywhere.
Sean
-----Original Message-----
From: channelf-bounce@xxxxxxxxxxxxx [mailto:channelf-bounce@xxxxxxxxxxxxx]
On Behalf Of Fredric CJ Blåholtz
Sent: Sunday, June 17, 2007 12:36 PM
To: channelf@xxxxxxxxxxxxx
Subject: [channelf] Re: New Bios
Hello, it was Sean Riddle that dumped it, not me, perhaps you can
borrow his dumper if you write him.
http://members.cox.net/seanriddle/chanf.html
... or you can build one of your own.
These aren't plain memory circuits, but 3851 PSU:s, you need to
emulate some signals to dump the code, there are a few pdf-documents
on what rom-codes you need to send to the PSU (or 3852/53) if you
don't have them already they are here (my personal webspace):
http://w5.nuinternet.com/s660100106/files/channelf/f3850.pdf
http://w5.nuinternet.com/s660100106/files/channelf/f3852_53.pdf
I was planning to emulate a 3853 perhaps with a PIC or PLC or similar
to be able to build my own carts - without the need for a donor
Chess-cartridge, but I haven't gotten around to it yet. ;-)
2007/6/17, Knowles, Ian <I.M.Knowles@xxxxxxxxxxxxxxxxxxxxxxx>:
>
>
>
> Hi Frederic,
>
> A friend bought a Grandstand ChannelF and inside one of the chips is
> labelled SL31291, I only have a programmer for eeproms and a limited
> knowledge on dumping things. Would you be able to provide details of how
you
> dumped the other bioses?
--
__________________________________
* Fairchild Channel F collector extraordinaire *
http://go.to/channelf
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