Re: [stella] Dumping ROM images

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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