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Subject: Re: [stella] Dumping ROM images From: Adam Wozniak <adam@xxxxxxxxxxxxxxxx> Date: Sat, 12 Mar 2005 08:52:52 -0500 |
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On Fri, 11 Mar 2005, Eckhard Stolberg wrote:
> > Unanswered questions: Will inserting and removing carts cause any noise
> > on the bus lines? Can the reader code be made to fit into 128 bytes?
>
> The transfer code is small enough to fit into 128 bytes, and
> infact it sometimes is used in RIOT RAM when a game can't
> be read reliably at 7800 speed. But the code to autodetect
> the bankswitching type would be too big to run in RIOT RAM,
> so you would have to manually set the bankswitching type
> for each game that you want to read.
I was thinking of something less complicated on the 2600 end.
while(1)
{
get address and number of bytes to read from right joystick port
read the data at that address
send the data out the right joystick port
}
Then all the bankswitching logic can be resident on the PC end.
- --
adam@xxxxxxxxxxxxxxxx http://cuddlepuddle.org/~adam
KG6GZR http://cuddlepuddle.org/~adam/resume.html
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