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Sega 32X Chipset
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1994 837-10926 IC BD MARS SUB VA0 NTSC (Top PCB) - 171-6843F (C)SEGA
1994
1994 837-1 0925 IC BD MARS MAIN VA0 (Bottom PCB) - 171-6842E (C)SEGA
1994
This is a complete list of an NTSC north american first-generation
Sega 32X chips and descriptions. I have compiled this
list by taking apart my own unit and documenting everything:
32X PCB Front:
32X PCB Back
Note
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The 32X is split into two PCB circuit boards. The top half
is where the 32X cartridge plugs into the unit. There are 2
ribbon cables and various wires that connect to the bottom half
which is pointed down and away from the top PCB. This
portion plugs into the Sega Genesis. The bottom half looks
very similar to a standard Genesis PCB, it even has series 171
serial numbers just like Genesis carts. This portion of the
board contains the heart and soul of the 32X, both SH2 processors,
RAM and VDP's.
Hardware Specs:
(From 32X Packaging Material)
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CPU: 2 Hitatchi 32-bit RISC @ 23MHz / 40 MIPS
RAM: 512 KBytes / 4 Megabit
Colors: 32,768 Simultaneous / 50,000 Polygons /sec.
| SH2 4J3 | Hitatchi SH2 CPU @ 23MHz
| XY0011 | IC #1
| HD6417095 |
| F28 JAPAN |
| SH2 4J3 | Hitatchi SH2 CPU @ 23 MHz
| XY0011 | IC #2
| HD6417095 |
| F28 JAPAN |
| NEC JAPAN |
| D4502161G5 | IC #3
| -A12-7JF-A |
| 9432K9228 |
| SEGA |
| 315-5818 | IC #4
| 9437KX253 |
| SEGA |
| 315-5805 | IC #5
| 9428EK723 |
| SEGA |
| 315-5781A | IC #6
| 9440KX005 |
| TOSHIBA | x16 Fast Page Mode DRAM
| TC511664BJ-80 | IC #7
| JAPAN 9346HBI |
| TOSHIBA | x16 Fast Page Mode DRAM
| TC511664BJ-80 | IC #8
| JAPAN 9346HBI |
| T 9434H |
| 74AC04 | IC #9
| SEGA |
| 315-5684 | IC #11
| 412 126 |
| SEGA |
| 315-5788 | IC #12
| 436 135 |
| M0634A |
| KCAA | IC #13
| P46AF |
| DM74L500M | IC #15 (Glued over, assumed same as IC #16)
| P46AF |
| DM74L500M | IC #16
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