Sega Mega Drive/Genesis Hardware
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Contents
Motherboard
NTSC Model 1 VA7
Board label: PC BD M5 USA VA7
| IC# | Brand | Name | Description | Documentation |
| IC1 | Motorola | MC68HC000FN8 | Processor | |
| IC2/IC3 | Sharp | LH5P832N-12 | CMOS 256K (32K x 8) Pseudo-Static RAM | |
| IC4 | Zilog | Z0840004PSC | Zilog Z80 8-bit coprocessor | |
| IC5 | Sanyo | LC3564PM | 64K (8192 words x 8 bits) SRAM | |
| IC6 | SEGA | 315-5487-01 | I/O, Bus arbiter, VDP, ym2612, TMSS | |
| IC7/IC8 | Hitachi | HM53461ZP-12SG | 65,536-WORDx4-bit Multiport CMOS video ram | HERE |
| IC9/IC10 | Rohm | BA10324AF | Op-amp | |
| IC11 | SONY | CXA1145M | Video | |
| IC12 | ? | TA7805S | Voltage regulator |
NTSC Model 2 VA1
Board label: PC BD MD2 VA1 USA
| IC# | Brand | Name | Description | Documentation |
| IC1 | Motorola | MC68HC000FN8 | Processor | |
| IC2 | Toshiba | TC511632FL-10 | 65,536 Word x 16 Bit Dynamic Ram | |
| IC3 | ? | ? | ? | |
| IC4 | SEGA | 315-5678 (?) | ? | |
| IC5 | Fujitsu | M88464A-10L | 8K Words x 8-Bit (64K) CMOS SRAM Low Power | |
| IC6 | SEGA | 315-5660 | ? | |
| IC7 | OKI | M54C864-80 | 65,536-Word x 8-Bit Multiport DRAM | |
| IC8 | ? | ? | ? | |
| IC9/IC10 | ? | LM324 | Low power quad op amps | |
| IC11 | SONY | CXA1145M | Video (RGB Encoder) | HERE |
| IC12 | ? | ? | Voltage regulator |
PAL Model 1 M5
Board label: IC BD M5 PAL
| IC# | Brand | Name | Description | Documentation |
| IC1 | Hitachi | HD68HC000P8 | 8MHz Processor | |
| IC2/IC3 | Motorola | MCM51L832ASP10 | CMOS 1024 BIT SRAM | |
| IC4 | SEGA | 315-5433 | ? | |
| IC5 | SEGA | 315-5313A | ? | |
| IC6 | Zilog | Z0840004PSC | Zilog Z80 8-bit coprocessor | |
| IC7 | Fujitsu | MB8464A-10LL-SK | CMOS 65,536 SRAM | |
| IC8 | ? | ? | ? | |
| IC9/IC10 | ? | ? | ? | |
| IC11 | Yamaha | YM2612 | Audio | |
| IC12 | SONY | CXA1034P | Amplifier | |
| IC13 | SONY | CXA1145P | Video | |
| IC14 | ? | ? | ? |
PAL Model 2 VA1.8
Board label: PC BD MD2 VA1.8 PAL
| IC# | Brand | Name | Description | Documentation |
| IC1 | Motorola | MC68HC000FN8 | Processor | |
| IC2 | ? | 651632DFP-15 | ? | |
| IC3 | ? | ? | ? | |
| IC4 | Zilog | Z84C0006FEC | Zilog Z80 8-bit coprocessor | |
| IC5 | ? | ? | ? | |
| IC6 | SEGA | 315-5660 | ? | |
| IC7 | ? | HM53861J-8 | ? | |
| IC8 | ? | ? | ? | |
| IC9/IC10 | ? | BA10324AF | Op-amp | |
| IC11 | ? | MB3514 | ? | |
| IC12 | ? | ? | Voltage regulator |
