INES Mapper 000: Difference between revisions

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(An extension)
(NROM-368)
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In addition, it is used for demos with up to 32 KB PRG ROM and 8 KB of CHR RAM which would otherwise not be supported on a standard NROM board. In theory, [[BNROM]] ([[iNES Mapper 034]]) might be a more appropriate choice for these demos.
In addition, it is used for demos with up to 32 KB PRG ROM and 8 KB of CHR RAM which would otherwise not be supported on a standard NROM board. In theory, [[BNROM]] ([[iNES Mapper 034]]) might be a more appropriate choice for these demos.


An extension past 32 KiB was mooted on the BBS in May 2012, allowing $4800-$7FFF to be decoded to allow more linear address space for use with cc65.[http://nesdev.parodius.com/bbs/viewtopic.php?t=8921]
In May 2012, the [[NROM-368]] extension was proposed, allowing 46 KB PRG ROM.


   Here are Disch's original notes:
   Here are Disch's original notes:

Revision as of 14:24, 27 May 2012


iNES Mapper 000 is used to designate a board with up to 32 KiB PRG ROM, 8 KiB CHR ROM, and no mapper hardware. The most common board like this is NROM; others include RROM.

In addition, it is used for demos with up to 32 KB PRG ROM and 8 KB of CHR RAM which would otherwise not be supported on a standard NROM board. In theory, BNROM (iNES Mapper 034) might be a more appropriate choice for these demos.

In May 2012, the NROM-368 extension was proposed, allowing 46 KB PRG ROM.

 Here are Disch's original notes:
 
 ========================
 =  Mapper 000          =
 ========================
 
 aka
 --------------------------
 NROM
 "no mapper"
 
 
 Example Games:
 --------------------------
 Ice Climber (J) (RROM)
 Excitebike
 Balloon Fight
 Super Mario Bros.
 
 
 
 Notes:
 --------------------------
 No swapping of any kind.  All slots fixed, mirroring is hardwired, etc.