NES 2.0 Mapper 390: Difference between revisions

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(Created page with "{{DEFAULTSORT:390}}Category:Multicart mappers '''NES 2.0 Mapper 390''' denotes the Realtec '''8031''' multicart PCB. ==CHR and Mirroring Select ($8000-$BFFF, write)== Ma...")
 
(It turns out that mapper 390 is a duplicate of mapper 236.)
 
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{{DEFAULTSORT:390}}[[Category:Multicart mappers]]
#redirect [[INES Mapper 236]]
'''NES 2.0 Mapper 390''' denotes the Realtec '''8031''' multicart PCB.
 
==CHR and Mirroring Select ($8000-$BFFF, write)==
Mask: $C000
A~FEDC BA98 7654 3210
  -------------------
  10.. .... ..M. CCCC
              |  ++++- CHR A13..A16
              +------- Mirroring
                        0=Vertical
                        1=Horizontal
 
==PRG and Mode Select ($C000-$FFFF, write)==
Mask: $C000
A~FEDC BA98 7654 3210
  -------------------
  11.. .... ..MM Pppp
              || ++++- PRG A14..A17
              ++------ PRG Mode
                        0: UNROM (ppp=7 when CPU A14=1)
                        1: UNROM, PRG A0-A3 OR'd with solder pad value
                        2: Unused, maybe NROM-256?
                        3: NROM-128, ppp unmodified

Latest revision as of 08:17, 25 April 2021

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