INES Mapper 079: Difference between revisions
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[[iNES Mapper 079]] is used to designate the [[NINA-003-006|NINA-003/6]] boards. | [[iNES Mapper 079]] is used to designate the [[NINA-003-006|NINA-003/6]] boards. | ||
Here are Disch's original notes: | Here are Disch's original notes: | ||
Revision as of 15:00, 28 February 2012
iNES Mapper 079 is used to designate the NINA-003/6 boards.
Here are Disch's original notes:
========================
= Mapper 079 =
========================
Example Games:
--------------------------
Blackjack
Dudes with Attitude
F-15 City War
Krazy Kreatures
Registers:
---------------------------
Range,Mask: $4100-5FFF, $4100
be sure to make note of the mask -- $4200 does not map to the register, but $4300 does.
$4100: [.CPP PCCC]
C = CHR Reg (8k @ $0000)
P = PRG Reg (32k @ $8000)
Note the high bit of the CHR Reg.
The largest game in BootGod's database is 64k/64k and its hardware only has 4 bits of state, mapped as
$4100: [.... PCCC] with the same meaning as above.
Note that FCEUX's implementation maps the register as
$4100: [CCCC XCCC]
X = PRG Reg (32k @ $8000)
all 8 bits = CHR Reg (8k @ $0000)
$8000: [CCCC CCCC]
C = CHR Reg (8k @ $8000)
