NES 2.0 Mapper 342
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NES 2.0 Mapper 342 is used for the homebrew COOLGIRL multicart. In addition to native registers, it can simulate about 25 commercial-era mappers on a hardware level. It can address up to 128 MiB of PRG-ROM, 512 KiB of CHR-RAM, and 32 KiB of WRAM. Like the COOLBOY mapper that inspired it, CHR-RAM is filled with pattern data copied from PRG-ROM by the multicart menu after a game has been selected. Its UNIF board name is just COOLGIRL.
Registers
Range: $5000-$5FFF
Mask: $5007
All registers are $00 on power-on and reset.
$5xx0
7 bit 0 ---- ---- PPPP PPPP |||| |||| ++++-++++-- PRG base offset (A29-A22)
$5xx1
7 bit 0 ---- ---- PPPP PPPP |||| |||| ++++-++++-- PRG base offset (A21-A14)
$5xx2
7 bit 0 ---- ---- AMMM MMMM |||| |||| |+++-++++-- PRG mask (A20-A14, inverted+anded with PRG address) +---------- CHR mask (A18, inverted+anded with CHR address)
$5xx3
7 bit 0 ---- ---- BBBC CCCC |||| |||| |||+-++++-- CHR bank A (bits 7-3) +++-------- PRG banking mode (see below)
$5xx4
7 bit 0 ---- ---- DDDE EEEE |||| |||| |||+-++++-- CHR mask (A17-A13, inverted+anded with CHR address) +++-------- CHR banking mode (see below)
$5xx5
7 bit 0 ---- ---- CDDE EEWW |||| |||| |||| ||++-- 8KiB WRAM page at $6000-$7FFF |+++-++---- PRG bank A (bits 5-1) +---------- CHR bank A (bit 8)
$5xx6
7 bit 0 ---- ---- FFFM MMMM |||| |||| |||+ ++++-- Mapper code (bits 4-0, see below) +++-------- Flags 2-0, functionality depends on selected mapper
$5xx7
7 bit 0 ---- ---- LMTR RSNO |||| |||+-- Enable WRAM (read and write) at $6000-$7FFF |||| ||+--- Allow writes to CHR RAM |||| |+---- Allow writes to flash chip |||+-+----- Mirroring (00=vertical, 01=horizontal, 10=1Sa, 11=1Sb) ||+-------- Enable four-screen mode |+-- ------ Mapper code (bit 5, see below) +---------- Lockout bit (prevent further writes to all registers)
Mapper codes
| Code | iNES mapper number(s) and name(s) | Flags meaning | Notes | | ====== + ================================== + ===================================== + ========================================= | | 000000 | 0 (NROM) † | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 000001 | 2 (UxROM) † | 0 - enable "Fire Hawk" mirroring for | Mapper 2 is fully compartible with mapper | | | 71 (Codemasters) * | mapper 71 (Codemasters) | 71 but "Fire Hawk" only uses mirroring | | | 30 (UNROM-512) | 1 - Enable one screen mirroring | control. UNROM-512 self-writable feature | | | | select for mapper 30 (UNROM-512) | is not supported | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 000010 | 2 (CNROM) † | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 000011 | 78 (Irem) * | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 000100 | 97 (Irem's TAM-S1) | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 000101 | 93 (Sunsoft-2) * | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 000110 | 163 (Nanjing) | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 000111 | 18 (Jaleco SS 88006) | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 001000 | 7 (AxROM) † | 0 - disable mirroring control, used | Can be oversized to 512 KiB. | | | 34 (BNROM, NINA-001) * | to select mapper 34 instead of 7 | iNES Mapper 034 is used to designate both | | | | | the BNROM and NINA-001 boards but only | | | | | BNROM is supported | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 001001 | 228 (Action 52) | | Only Cheetahmen II is supported | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 001010 | 11 (Color Dreams) * | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 001011 | 66 (GxROM) * | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 001100 | 87 * | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 001101 | 90 (J.Y. Company) * | | Partial support only, can be used for | | | | | "Aladdin" and "Super Mario World" only. | | | | | "Super Mario World" requires to enable | | | | | accurate IRQs and multiplier (disabled by | | | | | default) | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 001110 | 65 (Irem's H3001) * | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 001111 | 5 (MMC5) * | | Experimental partically support, can be | | | | | used for "Castlevania 3 (U)" only | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 010000 | 1 (MMC1) † | 0 - enable 16KiB of WRAM | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 010001 | 9 (MMC2) * | | | | | 10 (MMC4) * | 0 - 0=MMC2, 1=MMC4 | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 010010 | 70 * | 0 - 0=70, 1=152 | | | | 152 * | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 010011 | 73 (VRC3) | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 010100 | 4 (MMC3/MMC6) † | 0 - use mapper 118 (TxROM) | Can be oversized up to 2 MiB | | | 118 (TxROM) * | 1 - use mapper 189 | | | | 189 * | 2 - use mapper 206 | | | | 206 (Namco, Tengen, others) | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 010101 | 112 | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 010110 | 33 (Taito) * | 0 - 0=33, 1=48 | | | | 48 (Taito) * | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 010111 | 42 (FDS conversions) * | | Interrupts disabled by default | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 011000 | 21 (VRC2/VRC4) * | 0 - switch A0 and A1 lines: | | | | 22 (VRC2/VRC4) * | 0=A0,A1 like VRC2b (mapper 23), | | | | 23 (VRC2/VRC4) * | 1=A1,A0 like VRC2a(22), VRC2c(25) | | | | 25 (VRC2/VRC4) * | 1 - divide CHR bank select by two | | | | | (VRC2a, mapper 22) | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 011001 | 69 (Sunsoft FME-7) * | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 011010 | 32 (IREM G-101) * | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 011011 | 79 (NINA-03/06) | | | | | 146 (Sachen 3015) | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 011100 | 133 (Sachen) | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 011101 | 36 (TXC's PCB 01-22000-400) | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 011110 | Reserved | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 011111 | 184 (Sunsoft-1) | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 100000 | 38 | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 100001 | Reserved | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 100010 | 75 (VRC1) | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 100011 | 83 | 0 - DIP switch 0 | Partial support, submapper 1 requires | | | | 1 - DIP switch 1 | 512 KiB of CHR RAM | | | | 2 - use submapper 1 | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 100100 | 67 (Sunsoft-3) | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | 100101 | 89 (Sunsoft-2 on Sunsoft-3 PCB) | | | | ------ + ---------------------------------- + ------------------------------------- + ----------------------------------------- | | ...... | Reserved | | | † - very popular mappers, can't be disabled in config * - enabled by default in config
PRG banking modes
Power-on/reset state: A=0, B=~2, C=~1, D=~0
| Code | $8000 | $A000 | $E000 | $C000 | Notes | | ==== + ===== + ===== + ===== + ===== + ======================================== | | 000 | A | C | UxROM, MMC4, MMC1 mode #3, etc. | | ---- + ------------- + ------------- + ---------------------------------------- | | 001 | C | A | Mapper 97 (TAM-S1) | | ---- + ------------- + ------------- + ---------------------------------------- | | 010 | Reserved | | | ---- + ----------------------------- + ---------------------------------------- | | 011 | Reserved | | | ---- + ----- + ----- + ----- + ----- + ---------------------------------------- | | 100 | A | B | C | D | Universal, used by MMC3 mode 0, etc. | | ---- + ----- + ----- + ----- + ----- + ---------------------------------------- | | 101 | C | B | A | D | MMC3 mode 1 | | ---- + ----- + ----- + ----- + ----- + ---------------------------------------- | | 110 | B | Mapper 163 | | ---- + ----------------------------- + ---------------------------------------- | | 111 | A | AxROM, MMC1 modes 0/1, Color Dreams |
CHR banking modes
Power-on/reset state: A=0, B=1, C=2, D=3, E=4, F=5, G=6, H=7
| Code | $0000 | $0400 | $0800 | $0C00 | $1000 | $1400 | $1800 | $1C00 | Notes | | ==== + ===== + ===== + ===== + ===== + ===== + ===== + ===== + ===== + ======================================== | | 000 | A | Used by many simple mappers | | ---- + ------------------------------------------------------------- + ---------------------------------------- | | 001 | Special mode | Used by mapper 163 | | ---- + ----- + ----- + ----- + ----- + ----- + ----- + ----- + ----- + ---------------------------------------- | | 010 | A | C | E | F | G | H | Used by MMC3 mode 0 | | ---- + ----- + ----- + ----- + ----- + ----- + ----- + ----- + ----- + ---------------------------------------- | | 011 | E | F | G | H | A | C | Used by MMC3 mode 1 | | ---- + ----- + ----- + ----- + ----- + ------------- + ------------- + ---------------------------------------- | | 100 | A | E | Used by MMC1 | | ---- + ----------------------------- + ------------- + ------------- + ---------------------------------------- | | 101 | A/B | E/F | MMC2/MMC4, switched by tiles $FD or $FE | | ---- + ------- ----- + ------------- + ------------- + ------------- + ---------------------------------------- | | 110 | A | C | E | G | Used by many complicated mappers | | ---- + ----- + ----- + ----- + ----- + ----- + ----- + ----- + ----- + ---------------------------------------- | | 111 | A | B | C | D | E | F | G | H | Used by very complicated mappers |
