contra.cfg

# defines where the banks will be loaded into CPU address space
MEMORY {
    # Define CPU memory map for zero page, not saved to ROM
    ZEROPAGE: start = $00,   size = $100,   type = rw;
    RAM:      start = $100,  size = $6ff,  type = rw, fill = no;

    # INES Cartridge Header, not loaded into CPU memory
    HEADER: start = $0000, size = $0010, fill = yes;

    OAMRAM: file="", start = $0200, size = $0100, type = rw;

    # UxROM (002) bank layout
    BANK_0: start = $8000, size = $4000, type = ro, fill = yes, fillval = $FF;
    BANK_1: start = $8000, size = $4000, type = ro, fill = yes, fillval = $FF;
    BANK_2: start = $8000, size = $4000, type = ro, fill = yes, fillval = $FF;
    BANK_3: start = $8000, size = $4000, type = ro, fill = yes, fillval = $FF;
    BANK_4: start = $8000, size = $4000, type = ro, fill = yes, fillval = $FF;
    BANK_5: start = $8000, size = $4000, type = ro, fill = yes, fillval = $FF;
    BANK_6: start = $8000, size = $4000, type = ro, fill = yes, fillval = $FF;
    BANK_7: start = $C000, size = $3C00, type = ro, fill = yes, fillval = $FF;
    # BANK_7 is actually still $4000 bytes large, but the hardware vectors, and
    # the NES_FOOTER, which are on BANK7, are counted separately

    # Hardware Vectors at End of 2nd 8K ROM (NES hard-coded location)
    DPCM_SAMPLES: start = $FC00, size = $03D0, type = ro, fill = no;
    NES_FOOTER: start = $FFD0, size = $002A, type = ro, fill = no;
    VECTORS: start = $FFFA, size = $0006, type = ro, fill = no;
}

# defines the order of the segments as they are stored in the .nes ROM file
SEGMENTS {
    ZEROPAGE: load = ZEROPAGE, type = zp;
    RAM: load = RAM, type = bss;
    HEADER: load = HEADER, type = ro;
    OAMRAM: load = OAMRAM, type = bss, define=yes, optional=yes;
    BANK_0: load = BANK_0, type = ro;
    BANK_1: load = BANK_1, type = ro;
    BANK_2: load = BANK_2, type = ro;
    BANK_3: load = BANK_3, type = ro;
    BANK_4: load = BANK_4, type = ro;
    BANK_5: load = BANK_5, type = ro;
    BANK_6: load = BANK_6, type = ro;
    BANK_7: load = BANK_7, type = ro;
    DPCM_SAMPLES: load = DPCM_SAMPLES, type = ro;
    NES_FOOTER: load = NES_FOOTER, type = ro;
    VECTORS: load = VECTORS, type = ro;
}