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| − | =Model 1=
| + | #redirect [[sega:Sega Mega Drive/Board Revisions]] |
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| − | ==VA2: USA, High Definition Graphics==
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| − | [[Image:MD1_IC_BD_M5_USA_VA2.jpg|320px]]
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| − | | |
| − | Components:
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| − | *M68K CPU: Signetics SCN68000C8N64
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| − | *M68K memory: 2x TC51832SPL-12 (32Kx8 PSRAM, 120 ns)
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| − | *Z80 CPU: Zilog Z0840004PSC
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| − | *Z80 memory: NEC D4168C-15 (8Kx8 XRAM, 150 ns)
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| − | *I/O chips: Sega 315-5308, Sega 315-5309, Sega 315-5345 (DIP-16)
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| − | *VDP: Sega 315-5313 (Yamaha YM7101)
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| − | *Video RAM: 2x [NUMBER PLEASE] (64Kx4 DRAM)
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| − | *Headphone amp: Sony CXA1034
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| − | *Video encoder: Sony CXA1145
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| − | *FM synthesizer: Yamaha YM2612
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| − | | |
| − | ==VA6: USA, High Definition Graphics==
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| − | [[Image:MD1_IC_BD_M5_USA_VA6.jpg|320px]] | |
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| − | Components:
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| − | *M68K CPU: Motorola MC68000P8
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| − | *M68K memory: 2x HM652568LSP-10 (32Kx8 PSRAM, 100 ns)
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| − | *Z80 CPU: Zilog Z0840004PSC
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| − | *Z80 memory: MB8464A-10 (8Kx8 SRAM, 100 ns)
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| − | *I/O chip: Sega 315-5433
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| − | *VDP: Sega 315-5313 (Yamaha YM7101)
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| − | *Video RAM: 2x [NUMBER PLEASE] (64Kx4 DRAM)
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| − | *Headphone amp: Sony CXA1034
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| − | *Video encoder: Sony CXA1145P
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| − | *FM synthesizer: Yamaha YM2612
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| − | | |
| − | ==VA6: PAL==
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| − | [[Image:MD1_IC_BD_M5_PAL_VA6.jpg|320px]]
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| − | | |
| − | =Model 2=
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| − | | |
| − | ==VA1.8: USA==
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| − | [[Image:PC_BD_MD2_VA1.8_USA.JPG|320px]]
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| − | | |
| − | ==VA1.8: Asia==
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| − | [[Image:PC_BD_MD2_VA1.8_ASIA.jpg|320px]]
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| − | | |
| − | Components:
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| − | *M68K CPU: Motorola MC68HC000FN8
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| − | *M68K memory: Toshiba TC511632FL-10 (32Kx16 PSRAM, 100 ns)
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| − | *Z80 CPU: Toshiba 84C00AU-6
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| − | *Z80 memory: [NUMBER PLEASE] (8Kx8 SRAM)
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| − | *Main ASIC: Sega 315-5660
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| − | | |
| − | =Model 3=
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| − | | |
| − | ==VA2: USA==
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| − | [[Image:PC_BD_MD3_VA2_USA.jpg|320px]]
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| − | | |
| − | Components:
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| − | *Main ASIC: Sega 315-6123 (contains M68K, Z80, VDP, YM2612, and probably some other components.)
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| − | *Memory (right of main ASIC): NEC D4502161G5 (128Kx16 SDRAM)
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| − | *Oscillator (bottom-right of main ASIC): SG53 PTR S 53.6931M
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| − | *Video Encoder (bottom-left of main ASIC): Sony CXA1645M
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| − | *Amplifier (left of main ASIC): TI 85AFTRF LM324
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| − | | |
| − | [[Category:Mega Drive Hardware]]
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