NES 2.0 Mapper 411: Difference between revisions
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| | +---- PRG A15 in NROM mode | | | +---- PRG A15 in NROM mode | ||
| +------ CHR A18 | | +------ CHR A18 | ||
+-------- PRG banking mode (PRG | +-------- PRG banking mode (PRG A13-A16 source) | ||
0: MMC3 | 0: MMC3 | ||
1: NROM (bits A-C) | 1: NROM (bits A-C, CPU A13) | ||
Power-on value: $80 | Power-on value: $80 | ||
Yes, the PRG A15/A16 bits are really in that order. | Yes, the PRG A15/A16 bits are really in that order. | ||
==Register 2 ($5FF1, write)== | ==Register 2 ($5FF1, write)== | ||
Mask: unknown, probably $F001 | Mask: unknown, probably $F001 | ||
Latest revision as of 09:34, 24 June 2020
NES 2.0 Mapper 411 denotes the A88S-1 multicart circuit board. It is yet another MMC3-compatible chipset with outer bank registers and an NROM mode.
- 1997 Super 7-in-1 (JY-201)
- 1997 Super 6-in-1 (JY-202)
- 1997 Super 7-in-1 (JY-203)
- 1997 龍珠武鬥會 7-in-1 (JY-204)
- 1997 Super 7-in-1 (JY-205)
- 1997 Super 7-in-1 (JY-206)
Registers
Register 1 ($5FF0, write)
Mask: unknown, probably $F001
D~7654 3210
---------
1M.c BCnA
| | |||+- PRG A14 in NROM-128 mode
| | ||+-- NROM mode type
| | || 0: PRG A14=A (NROM-128)
| | || 1: PRG A14=CPU A14 (NROM-256)
| | |+--- PRG A16 in NROM mode
| | +---- PRG A15 in NROM mode
| +------ CHR A18
+-------- PRG banking mode (PRG A13-A16 source)
0: MMC3
1: NROM (bits A-C, CPU A13)
Power-on value: $80
Yes, the PRG A15/A16 bits are really in that order.
Register 2 ($5FF1, write)
Mask: unknown, probably $F001 D~7654 3210 --------- 1p.. PCM. | ||+-- PRG A17/CHR A17 source | || 0: PRG A17=P, CHR A17=C (128 KiB inner PRG and CHR bank) | || 1: from MMC3 (256 KiB inner PRG and CHR bank) | |+--- CHR A17 if M=0 | +---- PRG A17 if M=0 +-------- PRG A18 Power-on value: $82
