INES Mapper 219: Difference between revisions

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iNES Mapper 219 is used for the 卡聖 (Kǎshèng) A9461 MMC3-clone-bearing board, used by:
iNES Mapper 219 is used for the 卡聖 (Kǎshèng) A9461 MMC3-clone-bearing board, used by:
* ''Toy Story''
* ''Toy Story''
* ''Super 1997 4-in-1''
* ''Super 1997 4-in-1 (NT-8029)''


==Mode Register ($8002)==
==Mode Register ($8002)==
Line 26: Line 26:
Mask: $E001. Used only if $8002 bit 5=0, see [[MMC3]]. Note that PRG-ROM and CHR-ROM banks are masked to 128 KiB.
Mask: $E001. Used only if $8002 bit 5=0, see [[MMC3]]. Note that PRG-ROM and CHR-ROM banks are masked to 128 KiB.


==Extended PRG-ROM Bank Index ($8000)/Data ($8001)==
==Extended PRG-ROM Bank Index ($8000, $23-$26)/Data ($8001)==
Mask: $E001. Used only if $8002 bit 5=1.
Mask: $E001. Used only if $8002 bit 5=1.


Line 44: Line 44:
     ++-++--- Bits 0-3 (reversed order) of 8 KiB PRG-ROM bank number
     ++-++--- Bits 0-3 (reversed order) of 8 KiB PRG-ROM bank number


==CHR-ROM Bank Number Latch Index ($8000)/Data ($8001)==
==CHR-ROM Bank Number Latch Index ($8000, $08-$1E, even)/Data ($8001)==
Mask: $E001. Used only if $8002 bit 5=1.
Mask: $E001. Used only if $8002 bit 5=1.


$8000/$8002 value:
$8000 value:
  D~7654 3210
  D~7654 3210
   ---------
   ---------
Line 62: Line 62:
         +++- Bits 4-6 OR'd with next CHR-ROM switch's data
         +++- Bits 4-6 OR'd with next CHR-ROM switch's data


==CHR-ROM Pseudo 2 KiB switch Index ($8000)/Data ($8001)==
==CHR-ROM Pseudo 2 KiB switch Index ($8000, $09-$0F, odd)/Data ($8001)==
Mask: $E001. Used only if $8002 bit 5=1.
Mask: $E001. Used only if $8002 bit 5=1.


$8000/$8002 value:
$8000 value:
  D~7654 3210
  D~7654 3210
   ---------
   ---------
Line 83: Line 83:
The value is OR'd with bit 1 SHR 1 of the value written to $8000, then OR'd with bits 0-2 SHL 4 of the value written to the CHR-ROM latch.
The value is OR'd with bit 1 SHR 1 of the value written to $8000, then OR'd with bits 0-2 SHL 4 of the value written to the CHR-ROM latch.


==CHR-ROM 1 KiB switch Index ($8000)/Data ($8001)==
==CHR-ROM 1 KiB switch Index ($8000, $11-$1F, odd)/Data ($8001)==
Mask: $E001. Used only if $8002 bit 5=1.
Mask: $E001. Used only if $8002 bit 5=1.


$8000/$8002 value:
$8000 value:
  D~7654 3210
  D~7654 3210
   ---------
   ---------
Line 118: Line 118:
   ..B. ....
   ..B. ....
     +------- Bit 1 of 128 KiB outer PRG-ROM and CHR-ROM bank
     +------- Bit 1 of 128 KiB outer PRG-ROM and CHR-ROM bank
The Outer Bank register must be initialized to $03 for the menu to appear.
==Note==
This mapper gets hot and breaks down easily when using dumping devices.
==Sources==
==Sources==
*[https://sourceforge.net/p/fceultra/code/3320/tree/fceu/trunk/src/boards/a9746.cpp FCEUX implementation]
*[https://sourceforge.net/p/fceultra/code/3320/tree/fceu/trunk/src/boards/a9746.cpp FCEUX implementation]
*[https://github.com/rdanbrook/nestopia/blob/88d130fd083b9662ef49e8d5ef95513f4bb8759e/source/core/board/NstBoardUnlA9746.cpp Nestopia's implementation]
*[https://github.com/rdanbrook/nestopia/blob/88d130fd083b9662ef49e8d5ef95513f4bb8759e/source/core/board/NstBoardUnlA9746.cpp Nestopia's implementation]

Latest revision as of 14:10, 25 March 2024

iNES Mapper 219 is used for the 卡聖 (Kǎshèng) A9461 MMC3-clone-bearing board, used by:

  • Toy Story
  • Super 1997 4-in-1 (NT-8029)

Mode Register ($8002)

Mask: $E003

7654 3210
---------
CPMR RRRR
||++-++++-*Select bank register number (0-7 in MMC3 mode, $08-$26 in Extended mode)
||+------- Select mode
||          0: MMC3 mode
||          1: Extended mode
|+--------*1: PRG A14 inversion in MMC3 mode
+---------*1: CHR A12 inversion in MMC3 mode

* Same as $8000

MMC3 mode registers ($8000-$FFFF)

Mask: $E001

$A000, $A001, $C000, $C001, $E000, $E001: As on regular MMC3.

MMC3 Bank Register Index ($8000)/Data ($8001)

Mask: $E001. Used only if $8002 bit 5=0, see MMC3. Note that PRG-ROM and CHR-ROM banks are masked to 128 KiB.

Extended PRG-ROM Bank Index ($8000, $23-$26)/Data ($8001)

Mask: $E001. Used only if $8002 bit 5=1.

$8000/$8002 value:

D~7654 3210
  ---------
  ..10 .RRR
        +++- 6: Select 8 KiB PRG-ROM bank at CPU $8000-$9FFF
             5: Select 8 KiB PRG-ROM bank at CPU $A000-$BFFF
             4: Select 8 KiB PRG-ROM bank at CPU $C000-$DFFF 
             3: Select 8 KiB PRG-ROM bank at CPU $E000-$FFFF

$8001 value:

D~7654 3210
  ---------
  ..BB BB..
    ++-++--- Bits 0-3 (reversed order) of 8 KiB PRG-ROM bank number

CHR-ROM Bank Number Latch Index ($8000, $08-$1E, even)/Data ($8001)

Mask: $E001. Used only if $8002 bit 5=1.

$8000 value:

D~7654 3210
  ---------
  ..00 1..0
or
D~7654 3210
  ---------
  ..01 ...0

$8001 value:

D~7654 3210
  ---------
  .... .654
        +++- Bits 4-6 OR'd with next CHR-ROM switch's data

CHR-ROM Pseudo 2 KiB switch Index ($8000, $09-$0F, odd)/Data ($8001)

Mask: $E001. Used only if $8002 bit 5=1.

$8000 value:

D~7654 3210
  ---------
  ..00 1RR1
        ++-- Select CHR-ROM address range to switch
         |    0: PPU $0000-$03FF
         |    1: PPU $0400-$07FF
         |    2: PPU $0800-$0BFF
         |    3: PPU $0C00-$0FFF
         +-- OR'd with Bit 0 of CHR-ROM bank data

$8001 value:

D~7654 3210
  ---------
  BBBB BBB.
  ++++-+++-- Bits 0-6 of 1 KiB CHR-ROM bank number at PPU address selected via $8000/$8002.

The value is OR'd with bit 1 SHR 1 of the value written to $8000, then OR'd with bits 0-2 SHL 4 of the value written to the CHR-ROM latch.

CHR-ROM 1 KiB switch Index ($8000, $11-$1F, odd)/Data ($8001)

Mask: $E001. Used only if $8002 bit 5=1.

$8000 value:

D~7654 3210
  ---------
  ..01 RR.1
       ++--- Select CHR-ROM address range to switch
              0: PPU $1000-$13FF
              1: PPU $1400-$17FF
              2: PPU $1800-$1BFF
              3: PPU $1C00-$1FFF

$8001 value:

D~7654 3210
  ---------
  BBBB BBB.
  ++++-+++-- Bits 0-6 of 1 KiB CHR-ROM bank number at PPU address selected via $8000/$8002.

The value is OR'd with bits 0-2 SHL 4 of the value written to the CHR-ROM latch.

Outer Bank Bit 0 ($5002)

Mask: $5003

D~7654 3210
  ---------
  .... ...B
          +- Bit 0 of 128 KiB outer PRG-ROM and CHR-ROM bank

Outer Bank Bit 1 ($5003)

Mask: $5003

D~7654 3210
  ---------
  ..B. ....
    +------- Bit 1 of 128 KiB outer PRG-ROM and CHR-ROM bank

The Outer Bank register must be initialized to $03 for the menu to appear.

Note

This mapper gets hot and breaks down easily when using dumping devices.

Sources