INES Mapper 225: Difference between revisions
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(Created page with "Category:iNES Mappers Here are Disch's original notes: ======================== = Mapper 225 = ======================== Example Games: ------------…") |
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Here are Disch's original notes: | Here are Disch's original notes: | ||
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Revision as of 01:38, 30 August 2012
Here are Disch's original notes:
========================
= Mapper 225 =
========================
Example Games:
--------------------------
52 Games
58-in-1
64-in-1
Registers:
---------------------------
$5800-5803: [.... RRRR] RAM (readable/writable)
(16 bits of RAM -- 4 bits in each of the 4 regs)
$5804-5FFF: mirrors $5800-5803
$8000-FFFF: A~[.HMO PPPP PPCC CCCC]
H = High bit (acts as bit 7 for PRG and CHR regs)
M = Mirroring (0=Vert, 1=Horz)
O = PRG Mode
P = PRG Reg
C = CHR Reg
CHR Setup:
---------------------------
$0000 $0400 $0800 $0C00 $1000 $1400 $1800 $1C00
+---------------------------------------------------------------+
CHR Mode 0: | $8000 |
+---------------------------------------------------------------+
PRG Setup:
---------------------------
$8000 $A000 $C000 $E000
+-------------------------------+
PRG Mode 0: | <$8000> |
+-------------------------------+
PRG Mode 1: | $8000 | $8000 |
+---------------+---------------+
