The game's mapper can be specified with the #ines.mapper directive.

You may either specify the board or chip name as a string, or the actual number as an integer. Valid integer values are 0-255. The built in names which can be used are listed below:

Name	Number
100-in-1 Contra Function 16	15
11 in 1 Ball Games	51
1200-in-1	227
1993 Super HiK 4-in-1 (MMC3)	49
20-in-1	61
31-in-1	229
700-in-1	62
72-in-1	225
76-in-1	226
A*ROM	7
AGCI	144
AMROM	7
ANROM	7
AOROM	7
Action 52	228
BNROM	34
Bandai	16
CNROM	3
CPROM	13
Caltron 6-in-1	41
Camerica (partial)	71
Camerica 9096	232
Color Dreams	11
Cony	83
Copyright	90
Debugging Mapper	100
Dragon Buster	95
Dragon Buster (MMC3 variant)	95
E*ROM	5
EKROM	5
ELROM	5
ETROM	5
EWROM	5
Extended VS Unisystem	151
FFE F3	8
FFE F4	6
FFE F8	17
FME-07	69
GNROM	66
GameStation/RumbleStation	46
Golden Game 150-in-1	235
H*ROM	4
HES-Mapper #113	113
HKROM	4
Hello Kitty 255 in 1	63
Irem 74161/32	78
Irem G-101	32
Irem H-3001	65
Jaleco SS8806	18
KS 202	142
Kid Niki (J)	97
Konami VRC1	75
Konami VRC2 A	22
Konami VRC2 B	23
Konami VRC2 Type A	22
Konami VRC2 Type B	23
Konami VRC3	73
Konami VRC4	21
Konami VRC4 Type Y	25
Konami VRC4 Y	25
Konami VRC6 A1/A0	24
Konami VRC7	85
MMC1	1
MMC2	9
MMC3	4
MMC4	10
MMC5	5
MMC6	4
Mapper 90	90
Mario 7 in 1 (MMC3)	52
Mario Baby	42
Maxi 15	234
NES-A*ROM	7
NES-AMROM	7
NES-ANROM	7
NES-AOROM	7
NES-B4	4
NES-BNROM	34
NES-CNROM	3
NES-E*ROM	5
NES-EKROM	5
NES-ELROM	5
NES-ETROM	5
NES-EWROM	5
NES-GNROM	66
NES-H*ROM	4
NES-HKROM	4
NES-MMC1	1
NES-MMC2	9
NES-MMC3	4
NES-MMC4	10
NES-MMC5	5
NES-MMC6	4
NES-NES-B4	4
NES-NROM	0
NES-P*ROM	9
NES-PEEOROM	9
NES-PNROM	9
NES-S*ROM	1
NES-SAROM	1
NES-SBROM	1
NES-SCROM	1
NES-SEROM	1
NES-SGROM	1
NES-SKROM	1
NES-SL1ROM	1
NES-SLROM	1
NES-SNROM	1
NES-SOROM	1
NES-T*ROM	4
NES-TFROM	4
NES-TGROM	4
NES-TKROM	4
NES-TKSROM	118
NES-TLROM	4
NES-TLSROM	118
NES-TQROM	119
NES-TR1ROM	4
NES-TSROM	4
NES-U*ROM	2
NES-UNROM	2
NES-UOROM	2
NINA-03	79
NINA-06	79
NONE	0
NROM	0
Namcot 106	19
Nina-01	34
Nintendo VS Unisystem	99
Nintendo VS Unisystem (Extended)	151
Nintendo World Championship	105
P*ROM	9
PC-HK-SF3	91
PEEOROM	9
PNROM	9
RAMBO-1	64
S*ROM	1
SAROM	1
SBROM	1
SCROM	1
SEROM	1
SGROM	1
SKROM	1
SL1ROM	1
SLROM	1
SMB2j (LF36)	43
SMB2j Pirate	40
SMB2j Pirate (KS 202)	142
SMB2j rev. A	50
SMB3 Pirate	56
SNROM	1
SOROM	1
Sachen 74LS374N	243
Sachen Copy Protection	143
Sachen Mapper 141	141
Study & Game 32 in 1	58
Sunsoft 3	67
Sunsoft 4	68
Sunsoft FME-07	69
Sunsoft Mapper #3	67
Sunsoft Mapper #4	68
Super 1,000,000 in 1 (MMC3)	45
Super Donkey Kong	182
Super HiK 7 in 1 (MMC3)	44
Super Mario World	90
Super Spike & Nintendo World Cup Soccer (MMC3)	47
Super Spike/World Cup	47
T*ROM	4
T3H53	59
T3H53	59
TC0190	33
TFROM	4
TGROM	4
TKROM	4
TKSROM	118
TLROM	4
TLSROM	118
TQROM	119
TR1ROM	4
TSROM	4
Taito TC0190	33
Tengen RAMBO-1	64
U*ROM	2
UNROM	2
UOROM	2
VRC1	75
VRC2 A	22
VRC2 B	23
VRC3	73
VRC4	21
VRC4 Y	25
VRC6 A1/A0	24
VRC7	85
VS Unisystem	99

Examples
#ines.mapper 4 #ines.mapper "none" #ines.mapper "TK-ROM" #ines.mapper "Nintendo VS Unisystem (Extended)"

If the game does not use a mapper which allows runtime mapper adjustment and has hardwired mirroring, you can specify it with the #ines.mirroring directive.

The mirroring can be specified with an integer boolean value (zero/nonzero), or with a string. The valid string values are "v", "h", "vertical", and "horizontal".

Examples
#ines.mirroring 0 #ines.mirroring 1 #ines.mirroring "v" #ines.mirroring "horizontal"

If the game uses extra VRAM for the additional nametable support, the #ines.fourscreen directive can be used.

The four screen support can be specified with an integer boolean value (zero/nonzero), or with a string. The valid string values are "y", "n", "yes", "no", "enabled", "disabled", etc.

Examples
#ines.fourscreen 0 #ines.fourscreen 1 #ines.fourscreen "Y" #ines.fourscreen "no"

The #ines.battery directive can be used to specify whether or not the game uses battery backed up SRAM.

The battery can be specified with an integer boolean value (zero/nonzero), or with a string. The valid string values are "y", "n", "yes", "no", "enabled", "disabled", etc.

Examples
#ines.battery 0 #ines.battery 1 #ines.battery "Y" #ines.battery "no"

The #ines.trainer directive specifies whether the game includes an embedded trainer.

It can be specified with an integer boolean value (zero/nonzero), or with a string. The valid string values are "y", "n", "yes", "no", "enabled", "disabled", etc.

Examples
#ines.trainer 0 #ines.trainer 1 #ines.trainer "Y" #ines.trainer "no"

The #ines.prgrepeat directive specifies a number in which to mirror and repeat the PRG ROM data, forcing a large ROM. It is useful if burning a 32K game to a 128K ROM for example. Simply set the repeat to 4 (32*4 = 128), and the output PRG binary will have the PRG mirrored four times.

Examples
#ines.prgrepeat 2

The #ines.chrrepeat directive specifies a number in which to mirror and repeat the CHR ROM data, forcing a large ROM. It is useful if burning a 32K game to a 128K ROM for example. Simply set the repeat to 4 (32*4 = 128), and the output CHR binary will have the PRG mirrored four times.

Examples
#ines.chrrepeat 2

The #ines.off directive turns off the iNES header. The result is a raw output file without the initial 16 byte header specific to NES ROMs. It is useful when using NESHLA for other platforms.

Examples
#ines.off