INES Mapper 000: Difference between revisions
From NESdev Wiki
Jump to navigationJump to search
No edit summary |
(An extension) |
||
| Line 5: | Line 5: | ||
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] | |||
Here are Disch's original notes: | Here are Disch's original notes: | ||
Revision as of 11:06, 24 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.
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.[1]
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.
