INES Mapper 236: Difference between revisions
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The Realtec '''8099''' PCB has twice the ROM size: | The Realtec '''8099''' PCB has twice the ROM size: | ||
* ''12-in-1'' | * ''智慧大全 12-in-1'' | ||
A variant of this circuit board with 512 KiB PRG-ROM and 8 KiB of unbanked CHR-RAM [https://github.com/SourMesen/Mesen/blob/master/Core/Bmc70in1.h is emulated under the same mapper number]: | A variant of this circuit board (Realtec '''8106''' PCB) with 512 KiB PRG-ROM and 8 KiB of unbanked CHR-RAM [https://github.com/SourMesen/Mesen/blob/master/Core/Bmc70in1.h is emulated under the same mapper number]: | ||
* ''800-in-1'' | * ''800-in-1'' | ||
Latest revision as of 14:11, 5 December 2021
iNES Mapper 236 denotes the Realtec 8031 and 8155 circuit boards, used for a number of multicarts with 128 KiB PRG-ROM and 64 KiB CHR-ROM:
- 35-in-1 (HM5511)
- 56-in-1 (NT-009)
- 68-in-1 (HM5511)
- 70-in-1
The Realtec 8099 PCB has twice the ROM size:
- 智慧大全 12-in-1
A variant of this circuit board (Realtec 8106 PCB) with 512 KiB PRG-ROM and 8 KiB of unbanked CHR-RAM is emulated under the same mapper number:
- 800-in-1
Due to the presence of four solder pads that select one of sixteen displayed game counts, the same ROM is bound to exist with different cartridge codes.
Lower Address Latch ($8000-$BFFF, write)
Mask: $C000
Variant with CHR-ROM:
A~FEDC BA98 7654 3210
-------------------
10.. .... ..M. CCCC
| ++++- CHR A16..A13
+------- Nametable mirroring
0: Vertical
1: Horizontal
Variant with CHR-RAM:
A~FEDC BA98 7654 3210
-------------------
10.. .... ..M. .PPP
| +++- PRG A19..A17
+------- Nametable mirroring
0: Vertical
1: Horizontal
Upper Address Latch ($C000-$FFFF, write)
Mask: $C000
Variant with CHR-ROM:
A~FEDC BA98 7654 3210
-------------------
11.. .... ..SS PPPP
|| ++++- PRG A17..A14
++------ PRG Mode
0: UNROM (PRG A14..16=111 when CPU A14=1)
1: Read Solder Pad (like SS=0, plus
PRG A0..A3=solder pad value)
2: NROM-256 (PRG A14=CPU A14)
3: NROM-128
Variant with CHR-RAM:
A~FEDC BA98 7654 3210
-------------------
11.. .... ..SS .PPP
|| +++- PRG A16..A14
++------ PRG Mode
0: UNROM (PRG A14..16=111 when CPU A14=1)
1: Read Solder Pad (like SS=0, plus
PRG A0..A3=solder pad value)
2: NROM-256 (PRG A14=CPU A14)
3: NROM-128
