User:Lidnariq/MMC3 Variants

Legend for bank style

PRG

• 32 - Banks 32 KiB at a time
• 16+16F - Bottom 16 KiB are bankable, top 16 KiB are fixed
• 16F+16 - Bottom 16 KiB are fixed, top 16 KiB are bankable
• 8+24F - Bottom 8 KiB are bankable, top 24 KiB are fixed
• 3×8+8F - Three independent 8 KiB banks at bottom, topmost 8 KiB are fixed
• N108 - The Namco 108 set the theme that many other bank styles derive from ( a.k.a. 8+8+16F = two independent 8 KiB banks at bottom, topmost 16 KiB are fixed)
• MMC3 - The MMC3 extended the banking style of the Namco 108 ( user switches between N108 and 8F+8+8+8F = bottommost and topmost 8 KiB are fixed, middle two 8 KiB banks are independently bankable)

CHR

• 8 - Banks 8 KiB at a time
• 2×4 - Two independent 4 KiB banks
• 4+4F - Bottom 4 KiB are bankable, top 4 KiB are fixed
• 4×2 - Four independent 2 KiB banks
• 8×1 - Eight independent 1 KiB banks
• N108 - Set the trend for CHR banking style also. Equivalent to 2×2+4×1 = two independent 2 KiB banks followed by four independent 1 KiB banks
• MMC3 - allows the user to swap which pattern table gets the "large" and "small" banks

Outer banks

"Outer banks" are things you find in the multicart mappers, where individual games write to the registers of the "regular" mapper and the menu writes to a separate set of registers that chooses which game will be played. For example, Nintendo World Cup appeared on two boards that extend the MMC3 in this way: one with SMB1 and Tetris and one with Super Spike V'Ball.

This same structure occasionally shows up in ordinary single-game mappers: Bandai's Oeka Kids games, Namco's Devil Man, several other Namco games, and a few HKOs that would like better corroboration.

ASIC mappers with simple banking

Also see Comparison of Nintendo mappers

		PRG		CHR
iNES Mapper	Short name	bank style	max (KiB)	bank style	max (KiB)	Mirroring	IRQ	WRAM	Comments
206	N108	8+8+16F	128	2×2+4×1	64	fixed	none	none	none
4	MMC3, MMC6	N108; 8F+8+8+8F	512	N108; 4×1+2×2	256	H/V	scanline	ext (MMC6 1024B int)
(none)	Famicom Disk System	32RAM+8F	arbitrary	unbanked	8	H/V	cycle	none	Expansion audio
1/155	MMC1	16+16F; 16F+16; 32	256 (512)	8; 2×4	128	1/H/V	none	sometimes bankable ext
5	MMC5	32; 2×16; 16+8+8; 4×8	1024	8; 2×4; 4×2; 8×1	1024	arbitrary	scanline	bankable ext + 1024B int	Expansion audio, vertical split, hardware multiplier, 8x8 attribute zones
9	MMC2	8+24F	128	2×4	128	H/V	none	none	tile triggered CHR banking
10	MMC4	16+16F	256	2×4	128	H/V	none	ext	tile triggered CHR banking
16/159	LZ93D50 (I²C)	16+16F	256	8×1	256	1/H/V	cycle	serial EEPROM
18	Jaleco SS88006	3×8+8F	256?	8×1	256	1/H/V	cycle	ext	ADPCM expansion audio
19	Namco 163	3×8+8F	512	12×1	256	arbitrary	cycle	ext + 128B int	Expansion audio, ROM nametables
21/23/25	VRC4	MMC3	256	8×1	512	1/H/V	scanline	ext
22/23/25	VRC2	N108	256	8×1	256	1/H/V	none	serial EEPROM
24/26	VRC6	16+8+8F	256	8×1; 6×1+2×3; 4×2+4×1; 4×1+4×2	256 (512)	arbitrary	scanline	ext	Expansion audio, ROM nametables
27	"Pirate" VRC4	3×8+8F	?256?	8×1	512	1/H/V	?	?
31	NSF subset	8×4	1024	unbanked	8	fixed	none	none
32	Irem G101	MMC3	256	8×1	256	H/V	none	none
33/48	TC0190	N108	512	N108	512	H/V	scanline(48)	ext
64	RAMBO-1	3×8+8F	256	MMC3; 8×1	256	H/V	scanline/cycle	none
65	Irem H3001	3×8+8F	512	8×1	256	H/V	cycle	ext
67	Sunsoft 3	16+16F	128?	4×2	128?	1/H/V	cycle	ext
68	Sunsoft 4	16+16F	256	4×2	256	1/H/V	none	ext	ROM nametables
69	Sunsoft FME-7	4×8+8F	256	8×1	256	1/H/V	cycle	ext	Expansion audio
73	VRC3	16+16F	128	unbanked	8	fixed	cycle	ext
74/194	TQROM-like (2kiB)	MMC3	1024	MMC3	254	1/H/V?	scanline?	ext?	CHR RAM and ROM, ?like TQROM?
75	VRC1	3×8+8F	128	2×4	128	H/V	none	none
76	N108 (inflated CHR)	N108	128	4×2	128	fixed	none	none
80	X1-005	3×8+8F	256	N108	256	H/V	none	128B int
82	X1-017	3×8+8F	512?	MMC3	256	H/V	cycle	5120B int
85	VRC7	3×8+8F	512	8×1	256	1/H/V	scanline	ext	Expansion audio
90	for: Tekken 2 HKO	8+32F; 8+16+16F; 4×8+8F; 8+32; 8+2×16; 4×8	2048?	8; 2×4; 4×2; 8×1	2048?	1/H/V	scanline/cycle/pixel	?	hardware multiplier
209/211	for: Tekken 2 HKO	8+32F; 8+16+16F; 4×8+8F; 8+32; 8+2×16; 4×8	2048?	8+4×1; 2×4+4×1; 4×2+4×1; 12×1	2048?	arbitrary	scanline/cycle/pixel	?	ROM nametables, hardware multiplier
91	for: Street Fighter 3 HKO	N108	128	4×2	512	?	?	?
95	N108 (nametable)	N108	128	N108	32	1/H	none	none
97	Irem TAM-S1	16F+16	256	unbanked	8	1/H/V	none	none
105	NES-EVENT	16+16F; 16F+16; 32	256	1×8; 2×4	8	1/H/V	other	ext
112	"chinese" N108	N108	256	N108	256	H/V	?	?
118	TLSROM, TKSROM	MMC3	512	MMC3	128	arbitrary	scanline	ext
119	TQROM (8kiB)	MMC3	512	MMC3	64	H/V	scanline	ext	CHR RAM and ROM
137	Sachen 8259 type D	32	256	4×1+1×4	32	1/H/V/L	none	?
153	LZ93D50 (RAM)	16+16F	512	unbanked	8	1/H/V	cycle	ext
157	Bandai Datach	16+16F	256	unbanked	8	1/H/V	cycle	serial EEPROMs	barcode reader
158	RAMBO-1 (nametable)	3×8+8F	256	MMC3; 8×1	128	arbitrary	scanline/cycle	none
165	MMC2 × MMC3	MMC3	512	2×4	128	?	?	?	tile triggered CHR banking, CHR RAM and ROM
182	for: Pocahontas	MMC3	256 (512?)	MMC3	256	H/V	scanline	?	?
189	MMC3 × BNROM	32	512	MMC3	256	?	?	none
191	TQROM-like (2kiB)	MMC3	256 (512?)	MMC3	128	1/H/V?	scanline?	ext?	CHR RAM and ROM, ?like TQROM?
192	TQROM-like (4kiB)	MMC3	512?	MMC3	252	1/H/V?	scanline?	ext?	CHR RAM and ROM, ?like TQROM?
193	NTDEC TC-112	8+24F	256	4+2+2	256	fixed	none	none
195	Waixing FS303	MMC3	512	MMC3	256	1/H/V	scanline	ext	CHR RAM and ROM, like TQROM
207	X1-005 (nametable)	3×8+8F	256	N108	128	1/H	none	128B int
210	Namco 175	3×8+8F	512	8×1	256	fixed	none	ext
210	Namco 340	3×8+8F	512	8×1	256	1/H/V	none	none
246	for: Feng Shen Bang	4×8	2048	4×2	512	fixed	none	2048B ext
252/253	Waixing VRC4 CHR ROM+RAM	MMC3	256?	8×1	254? 508?	1/H/V	cycle	ext?	CHR RAM and ROM
(none)	UNIF/UNL-DripGame	16+16F	256	4×2	32	1/H/V	cycle	ext	Expansion audio, 8x8 attribute zones

Mappers with outer banks

		PRG			CHR
iNES Mapper	Short name	inner	outer	max (KiB)	inner	outer	max (KiB)	Comments
12	for: dbz5	MMC3	—	512	MMC3	2×256	512	?like MMC3?
14	MMC3 × VRC2	MMC3	—	512	MMC3; 8×1	3×256	512	H/V, ext WRAM, Scanline IRQ, ?like MMC3?
28	Action 53	16+16F; 16F+16; 32	32…256	8192	8	—	32RAM	1/H/V
37	MMC3+'00+'161	MMC3	64; 128	256	MMC3	128	256	H/V, Scanline IRQ
44	for: Super Big 7-in-1	MMC3	128; 256	1024	MMC3	128; 256	1024	?like MMC3?
45	for: Super 4-in-1	MMC3	8…512	1024 (2048?)	MMC3	1…256	1024 (4096?)	?like MMC3?
47	MMC3+'161	MMC3	128	256	MMC3	128	256	H/V, Scanline IRQ
49	for: Super HIK 4-in-1	MMC3; 32	128	512	MMC3	128	512	?like MMC3?
52	for: Mario 7-in-1	MMC3	128; 256	1024	MMC3	128; 256	1024	?like MMC3?
88/154	N108 (pattern split)	N108	—	128	2×2/64 + 4×1/64	2×64	128	none
115	for: Thunderbolt 2 (ch)	MMC3; 16+16F; 16+8+8F	—	128 (256?)	MMC3	256	512	?like MMC3?
116	MMC1 × MMC3 × VRC2	MMC3; 16+16F; 16F+16; 32	—	256	MMC3; 2×4; 8×1	256	512	1/H/V, ?like MMC3?
138	Sachen 8259 type B	32	—	256	4×2	16	128	1/H/V/L
139	Sachen 8259 type C	32	—	256	4×2	32	256	1/H/V/L
141	Sachen 8259 type A	32	—	256	4×2	64	512	1/H/V/L
205	for: 3-in-1	MMC3	128; 256	512	MMC3	128; 256	512	?like MMC3?
245	MMC3 × SUROM	MMC3	512	1024	unbanked	—	8	?like MMC3?
(none)	UNIF/COOLBOY	MMC3; 16; 32	128…2048	32768	MMC3; 8	128; 256	256RAM	like MMC3

Discrete logic mappers

Only the ones not made by Nintendo.

This table describes the mappers as they existed, as opposed to any obvious oversize extensions.

See also Comparison of Nintendo mappers and User:Lidnariq/Discrete Logic Table.

You probably don't actually want to use these.

iNES	Chips	Max PRG (KiB)	PRG bank style	Max CHR (KiB)	CHR bank style	Mirroring	PRG RAM?	Bus conflicts?
Color Dreams (11, 144)	1	128	32	128	8	V/H hardwired	No	Yes
29 (RET-CUFROM)	3	128	16+16F	32	8	V hardwired	Yes	No
RET-UNROM 512 (30)	3 or 4	512	16+16F	32RAM	8	1 or V/H hardwired	No	Optional (extra IC)
NINA-001 (34)	6	64	32	64	4+4	V hardwired	Yes	No
38	2	128	32	32	8	V/H hardwired	Impossible	No
40 / 50 (w/ IRQ)	7-8	128	24F+8+8F	8		V/H hardwired	Impossible	No
41	7	256	32	128	8 inner / 32 outer	V/H switchable	Impossible	Partly
70	3	256	16+16F	128	8	V/H hardwired	No	Likely
72	4+speech	256	16+16F	128	8	V/H hardwired	No	Yes
77	4	512	32	32+6RAM	2+6RAM	4	No	Likely
78.1	3	128	16+16F	128	8	1	No	Likely
78.3	5	128	16+16F	128	8	V/H switchable	No	Yes
79 (146)	2	64	32	64	8	V/H hardwired	No	No
86	3+speech	128	32	64	8	V/H hardwired	Impossible	No
87 (101)	2	32		32	8	V/H hardwired	Impossible	No
89	2†	128	16+16F	128	8	1	No	Yes
92	5+speech	256	16F+16	128	8	V/H hardwired	No	Yes
93	2†	128	16+16F	8‡		V/H hardwired	No	Yes
94	2	128	16+16F	8		V/H hardwired	No	Yes
96	3	128	32	32RAM	4+4F inner / 16 outer	V/H hardwired	No	Likely
99	0*	40	8+24F	16	8	4	No	No
107	1?	128	32	64	8	V hardwired	No	Likely
133	2?	64	32	32	8	V/H hardwired	No	No
140	3	128	32	128	8	V/H hardwired	Impossible	No
143	2?	32		8		V/H hardwired	No	No
145	2?	32		16	8	V/H hardwired	No	No
147	2?	128	32	128	8	V/H hardwired	No	No
148	1?	64	32	64	8	V/H hardwired	No	Yes
149	1?	32		16	8	V/H hardwired	No	Yes
152	3	128	16+16F	128	8	1	No	Likely
168 (w/ IRQ)	7	64	16+16F	64RAM	4F+4	V hardwired	No	No
174	3	128	16 or 32	64	8	V/H switchable	No	No
184	3†	32		32	4+4	V/H hardwired	Impossible	No
185	1	32		8		V/H hardwired	No	Yes
218	-1§	32		1RAM		1 hardwired	No	No

† Mappers 89, 93, and 184 exist as a single IC, however their functions are trivially described using a small number of 7400-series ICs, and likely contain multiple silicon dice that were wire bonded together in the same package.

‡ Mapper 93 is technically the same 89 other than mirroring, but it only commercially existed using 8kB of CHR-RAM

* the Vs System distributed its original games as five or six 8 KiB ROMs, and decoding on its mainboard allowed banking of CHR like CNROM. It is a little disingenuous to claim that 0 ICs were necessary for banking since the same functionality is not possible on a Famicom, however, banking was incrementally free.

§ Doesn't have CHRROM, hence "-1" ICs