Having looked at many, many boards, I can say with reasonable confidence that they are labeled consistently.
SHVC-1A1B-04 - What does this mean?
SHVC - ROM Manufactured by Nintendo
1 - 1 ROM Chip
A - LoROM
1 - 16KB SRAM
B - 74LS139 SRAM Decoding
04 - Board Revision
I present a list of ordinary boards found in licensed cartridges. No special chips or prototypes present :
MAXI-1A0N-30-2
MJSC-1J0N-20-2
SHVC-1A0N-01
SHVC-1A0N-02
SHVC-1A0N-10
SHVC-1A0N-20
SHVC-1A0N-30
SHVC-1A1B-01
SHVC-1A1B-04
SHVC-1A1B-05
SHVC-1A1B-06
SHVC-1A1M-01
SHVC-1A1M-11
SHVC-1A1M-20
SHVC-1A3B-11
SHVC-1A3B-12
SHVC-1A3B-13
SHVC-1A3B-20
SHVC-1A3M-10
SHVC-1A3M-20
SHVC-1A3M-21
SHVC-1A3M-30
SHVC-1A5B-04
SHVC-1A5M-01
SHVC-1A5M-11
SHVC-1A5M-20
SHVC-1J0N-10
SHVC-1J0N-20
SHVC-1J1M-11
SHVC-1J1M-20
SHVC-1J3B-01
SHVC-1J3M-01
SHVC-1J3M-01
SHVC-1J3M-11
SHVC-1J3M-20
SHVC-1J5M-20
SHVC-2A0N-01
SHVC-2A0N-10
SHVC-2A0N-11
SHVC-2A3M-10
SHVC-2A3M-11
SHVC-2J0N-01
SHVC-2J0N-11
SHVC-2J3M-01
SHVC-3J0N-01
SHVC-3J3M-01
SHVC-BA1M-01
SHVC-BA3M-10
SHVC-BA5M-10
SHVC-BJ0N-01
SHVC-BJ1M-10
SHVC-BJ1M-20
SHVC-BJ3M-10
SHVC-BJ3M-20
SHVC-YA0N-01
SHVC-YJ0N-01
Here is the key to the board labels :
SHVC - Nintendo Made Chips
MAXI - Majesco Sales Made Chips
MJSC - Majesco Sales Made Chips
1 - 1 ROM Chip (32 or 36-pin)
2 - 2 ROM Chips (32-pin) (with 74LS00 or MAD-1 Decoder)
3 - 3 ROM Chips (32-pin) (with 74LS139 and/or MAD-1 Decoder)
B - 2 ROM Chips (36-pin) (with 74LS00 or MAD-1 Decoder)
Y - 2 ROM Chips (32-pin) (with 74LS00 Decoder)
A - LowROM
J - HighROM
1 - 16KB SRAM (24-pin)
3 - 64KB SRAM (28-pin)
5 - 256KB SRAM (28-pin)
Note : SRAM is always battery backed in ordinary boards
N - No SRAM Decoding (may have 74LS00 for 2 ROMs or 74LS139 for 3 ROMs)
B - 74LS139 SRAM Decoding
M - MAD-1 SRAM Decoding
SHVC-1A1B-04 - What does this mean?
SHVC - ROM Manufactured by Nintendo
1 - 1 ROM Chip
A - LoROM
1 - 16KB SRAM
B - 74LS139 SRAM Decoding
04 - Board Revision
I present a list of ordinary boards found in licensed cartridges. No special chips or prototypes present :
MAXI-1A0N-30-2
MJSC-1J0N-20-2
SHVC-1A0N-01
SHVC-1A0N-02
SHVC-1A0N-10
SHVC-1A0N-20
SHVC-1A0N-30
SHVC-1A1B-01
SHVC-1A1B-04
SHVC-1A1B-05
SHVC-1A1B-06
SHVC-1A1M-01
SHVC-1A1M-11
SHVC-1A1M-20
SHVC-1A3B-11
SHVC-1A3B-12
SHVC-1A3B-13
SHVC-1A3B-20
SHVC-1A3M-10
SHVC-1A3M-20
SHVC-1A3M-21
SHVC-1A3M-30
SHVC-1A5B-04
SHVC-1A5M-01
SHVC-1A5M-11
SHVC-1A5M-20
SHVC-1J0N-10
SHVC-1J0N-20
SHVC-1J1M-11
SHVC-1J1M-20
SHVC-1J3B-01
SHVC-1J3M-01
SHVC-1J3M-01
SHVC-1J3M-11
SHVC-1J3M-20
SHVC-1J5M-20
SHVC-2A0N-01
SHVC-2A0N-10
SHVC-2A0N-11
SHVC-2A3M-10
SHVC-2A3M-11
SHVC-2J0N-01
SHVC-2J0N-11
SHVC-2J3M-01
SHVC-3J0N-01
SHVC-3J3M-01
SHVC-BA1M-01
SHVC-BA3M-10
SHVC-BA5M-10
SHVC-BJ0N-01
SHVC-BJ1M-10
SHVC-BJ1M-20
SHVC-BJ3M-10
SHVC-BJ3M-20
SHVC-YA0N-01
SHVC-YJ0N-01
Here is the key to the board labels :
SHVC - Nintendo Made Chips
MAXI - Majesco Sales Made Chips
MJSC - Majesco Sales Made Chips
1 - 1 ROM Chip (32 or 36-pin)
2 - 2 ROM Chips (32-pin) (with 74LS00 or MAD-1 Decoder)
3 - 3 ROM Chips (32-pin) (with 74LS139 and/or MAD-1 Decoder)
B - 2 ROM Chips (36-pin) (with 74LS00 or MAD-1 Decoder)
Y - 2 ROM Chips (32-pin) (with 74LS00 Decoder)
A - LowROM
J - HighROM
1 - 16KB SRAM (24-pin)
3 - 64KB SRAM (28-pin)
5 - 256KB SRAM (28-pin)
Note : SRAM is always battery backed in ordinary boards
N - No SRAM Decoding (may have 74LS00 for 2 ROMs or 74LS139 for 3 ROMs)
B - 74LS139 SRAM Decoding
M - MAD-1 SRAM Decoding