author: rvu - march-2000 this is the complete header information i've been using lately, if you see something wrong or incomplete please tell me!. | 0 | 3 | 'NES' | | 3 | 1 | $1A | | 4 | 1 | 16K PRG-ROM page count | | 5 | 1 | 8K CHR-ROM page count | | 6 | 1 | ROM Control Byte #1 | | | | %####vTsM | | | | | ||||+- 0=Horizontal Mirroring | | | | | |||| 1=Vertical Mirroring | | | | | |||+-- 1=SRAM enabled | | | | | ||+--- 1=512-byte trainer present | | | | | |+---- 1=Four-screen VRAM layout | | | | | | | | | | +--+----- Mapper # (lower 4-bits) | | 7 | 1 | ROM Control Byte #2 | | | | %####0000 | | | | | | | | | | +--+----- Mapper # (upper 4-bits) | | 7 | 1 | 01=00-> nes rom | | 7 | 1 | 01=01-> vs unisystem rom | | 7 | 1 | 01=02-> playchoice rom | | 8 | 1 | $00 | | 9 | 1 | $00 | | 10 | 1 | 0=0->"100% compatible with NTSC console" | | 10 | 1 | 1=0->"Not necessarily 100% compatible | | | | with PAL console"" | | 10 | 1 | 4=0->"extra ram at $6000-$7fff | | 10 | 1 | 5=0->"don't have bus conflicts | | 11 | 6 | $00 |