Sega Master
System II Chipset
--------------------
837-7257
SEGA IC BD M4Jr. VA1
(C)SEGA 1990
171-5926-A
Model No:
MK-3006
Serial No: B00013549
This is a complete list of an NTSC north american Sega
Master System chips and descriptions. I have compiled this
list by taking apart my own unit and documenting everything:
Master System
II PCB:

Hardware Specs:
---------------
CPU: Z-80 (8-Bit) @ 3.6MHz
RAM: 8k SYSTEM, 16k VRAM
Resolution: 240x226
Colors: 52 on-screen out of 256 total color palette
| ZILOG | Zilog Z-80 CPU
| Z0840004PSC | IC #1 - 40 PIN
| SL0965 |
| Z80 CPU |
| 9023 DC |
| SEGA | Built-in Game ROM
| MPR-12808 W63 | IC #2 - 28 PIN
| 9023EX018 |
| NEC JAPAN | System RAM (8KB)
| D4168C-15 | IC #3 - 28 PIN
| 9016X5044 |
| SEGA 8813KY | I/O Controller
| 315-5216 | IC #4 - 42 PIN
| SEGA 9020K7 | Video Display Processor (VDP)
| 315-5246 | IC #5 - 64 PIN
| NEC JAPAN | Video RAM (Low 8KB)
| D4168C-15 | IC #6 - 28 PIN
| 9016X5044 |
| NEC JAPAN | Video RAM (High 8KB)
| D4168C-15 | IC #7 - 28 PIN
| 9016X5044 |
| MC7805 |
| (M) CT | IC #8 - 3 PIN
| J9006W |
| SONY | Video Encoder
| CXA1145P | IC #9 - 28 PIN
| JAPAN |
| 0F06M |
Notes:
-----------
Unlike modern consoles, the Sega Master System is universal, you
can play PAL or NTSC games on the console with minimal or no
problems. The following PAL games are known to have issues
on an NTSC machine:
The Newzealand
Story - Totally bugged, nearly unplayable (Works fine with a Sega
Genesis & Power Base Converter)
Operation Wolf - Glitchy but playable. (Works fine with a
Sega Genesis & Power Base Converter)
Predator 2 - Glitchy but playable
Cosmic Spacehead - Requires an SMS II in the US, Glitchy but
playable
Back To The Future II - Glitchy but playable
Home Alone - Glitchy but playable
Chase HQ - Glitchy if using the Automatic transmission.
Playable.
Bart Vs. The Space Mutants - Totally bugged, dies during the first
level.
All codemaster's
games with NOT play with an NTSC SMS I.