Game Boy Naming Convention

DMG PCB Naming Convention

DMG PCB codes follow the following convention:

DMG[-?[?]]-???[?][(?)]-NN
     |      |      |    \-- PCB revision
     |      |      \------- optional code in parentheses
     |      \-------------- mandatory three or four-letter descriptor
     \--------------------- one or two-letter optional part

Descriptor Codes

Code	MBC/Battery	ROM Size	RAM Size	ROM Package
(none)	-	-	-	QFP
A	none	256kbit	none	-
B	MBC1A/MBC1B/MBC1B1	512kbit?	-?	-
C	-	1Mbit	64kbit	Chip-on-Board
D	MBC1A/MBC1B/MBC1B1 + CR1616	2Mbit?	256kbit	-
E	-	4Mbit	512kbit	-
F	-	8Mbit	-	-
G	MBC2A + CR1616	16Mbit	-	-
H	-	32Mbit	-	-
K	MBC3A/MBC3B + CR2025	-	-	-
M	MBC30 + CR2025	-	-	-
N	-	-	-	SOIC (narrow)
P	MMM01	-	-	-
S	MMM01 + CR1616	-	-	-
T	HuC1A + CR1616	-	-	TSSOP
U	HuC3A + CR2025	-	-	TSOP

For example, DMG-BEAN-02 is a PCB made for

• MBC1A/MBC1B/MBC1B1 (without battery)
• 256kbit of ROM
• no SRAM
• ROM chip package is a narrow SOIC

PCB Revisions

Numbers include

• 01
• 02
• 03
• 10
• 20
• SP

Mostly minor routing differences if any. Sometimes additional components in 10, 20, SP. Never additional components in 0x?

Optional Parts

• DMG-MC-SFCN-01 Momotarou Collection 2
• DMG-M-PEAN-10 Taito Variety Pack

MC = Momotarou Collection? MultiCart?

Code in parentheses after descriptor is only ever K.

• DMG-BEAN(K)-10 Xenon 2
• DMG-DECN(K)-02 Mogurania (Mole Mania)

CGB PCB Naming Convention

CGB PCB codes follow the following convention:

DMG-?NN-NN
    |||  \-- PCB revision
    ||\----- PCB descriptor MBC
    |\------ PCB descriptor RAM/ROM size combination
    \------- PCB code

PCB Code

• A: Production Cartridges
• B: Test Cartridges
• Z: Revisions of certain A?? variants. Sometimes routing changes.

PCB Descriptor

Descriptors describe MBC and ROM/RAM size combinations only.

Number	MBC	RAM/ROM size combination
		RAM sizes	ROM sizes
0	MBC5 (w/ or w/o rumble)	4/8M	2/4k EEPROM or 1M SRAM
1	MBC5 (w/ rumble)	16/32/64M	64k
2	G-MMC1 (+ 8M FLASH)	2/4/8M	256k
3	MBC6 (+ 8M FLASH)	16/32/64M	256k
4	MBC7	4/8M	-?
5	-	-?	-?
6	-	2/4/8M	64k
7	-	16/32M	2/4k EEPROM
8	-	-?	-?
9	-	-?	-?

Maybe actually hierarchy? I.e. second figure is sub-index in first figure MBC PCB designs?

PCB Revisions

Numbers include

• 01
• 10

Never observed any major differences. Maybe minor solder mask differences?