Difference between revisions of "Todo/Mysteries"

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m (Created page with "==Registers== *What are $380011, $380061, $380065, $380067, and $3800E1 used for ? **smkdan: I noticed one time I tried running a burned BIOS that didn't have those init regs on ...")
 
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*What are $380011, $380061, $380065, $380067, and $3800E1 used for ?
 
*What are $380011, $380061, $380065, $380067, and $3800E1 used for ?
 
**smkdan: I noticed one time I tried running a burned BIOS that didn't have those init regs on my MV-2F and it was permanently stuck in a reset loop.  AES BIOS doesn't not have that code and is known to not work on real MVS. It's probably MVS specific init code for neo-b1 or protection to stop bootleg BIOS running on MVS? will confirm later on.
 
**smkdan: I noticed one time I tried running a burned BIOS that didn't have those init regs on my MV-2F and it was permanently stuck in a reset loop.  AES BIOS doesn't not have that code and is known to not work on real MVS. It's probably MVS specific init code for neo-b1 or protection to stop bootleg BIOS running on MVS? will confirm later on.
*What does $3C000E do when written to? some games detecting PAL mode set this bit.
 
  
 
SP-E init code:
 
SP-E init code:

Revision as of 13:15, 28 June 2011

Registers

  • What are $380011, $380061, $380065, $380067, and $3800E1 used for ?
    • smkdan: I noticed one time I tried running a burned BIOS that didn't have those init regs on my MV-2F and it was permanently stuck in a reset loop. AES BIOS doesn't not have that code and is known to not work on real MVS. It's probably MVS specific init code for neo-b1 or protection to stop bootleg BIOS running on MVS? will confirm later on.

SP-E init code:

	move.b	d0,$380065
	move.b	d0,$380067
  • CD registers

Others