Subject: Re: [stella] Dumping ROM images From: Adam Wozniak <adam@xxxxxxxxxxxxxxxx> Date: Sat, 12 Mar 2005 08:52:52 -0500 |
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 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 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQFCMuKryvXf5Z0z5zERAvdtAJ9FKyJudlYqZgVRg1Oj8jhxk6PgAwCgmgad ZhBOiMzGNPMcXUwINdVI5Jw= =i6nH -----END PGP SIGNATURE----- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://stella.biglist.com
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