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1.0 KiB
1.0 KiB
NES/Famicom-oriented modules
nes_hardware
module
The nes_hardware
module is imported automatically on NES targets.
TODO
nes_mmc4
module
The nes_mmc4
module is imported automatically on the NES MMC4 target.
and contains routines related to MMC4 bankswitching.
void set_prg_bank(byte a)
Changes the $8000-$BFFF PRG bank.
void set_chr_bank0(byte a)
Changes the CHR bank 0 ($0000-$0fff in the PPU memory space).
The high nibble (0 or 1) selects between chrrom0
and chrrom1
segments.
The low nibble L (0-$F) selects a 4K-aligned address in the segment ($L000).
void set_chr_bank1(byte a)
Changes the CHR bank 1 ($1000-$1fff in the PPU memory space).
The high nibble (0 or 1) selects between chrrom0
and chrrom1
segments.
The low nibble L (0-$F) selects a 4K-aligned address in the segment ($L000).
void set_vertical_mirroring()
Switches nametable mirroring to vertical.
void set_horizontal_mirroring()
Switches nametable mirroring to horizontal.