Difference between revisions of "Sega Mega Drive/Hardware revisions"
From Sega Retro
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===VA0 (JPN)=== | ===VA0 (JPN)=== | ||
[[File:Megadrive_JPN_VA0_Serial_No_-_98M10036.jpg|320px]] | [[File:Megadrive_JPN_VA0_Serial_No_-_98M10036.jpg|320px]] | ||
| + | |||
| + | Components : | ||
| + | Motherboard | ||
| + | *M68K CPU: Signetics SCN68000C8N64 | ||
| + | *M68K memory: 2x HM65256BLSP-15 (32Kx8 PSRAM, 150 ns) | ||
| + | *Z80 CPU: Zilog Z0840004PSC | ||
| + | *Z80 memory: TMM2063P - 10 (8Kx8 SRAM, 100 ns) | ||
| + | *I/O chips: Sega 315-5308, Sega 315-5309, Signectic 74LS00N, 74LS161AN, 74F161AN, 74LS74AN (DIP-16) | ||
| + | *VDP: Sega 315-5313 (Yamaha YM7101) | ||
| + | *Video RAM: 2x HM53461ZP-12 (64Kx4 DRAM 120ns) | ||
| + | *Headphone amp: Sony CXA1034 | ||
| + | *Video encoder: Sony CXA1145 | ||
| + | *FM synthesizer: Yamaha YM2612 | ||
===VA1 (JPN) === | ===VA1 (JPN) === | ||
Revision as of 19:12, 15 April 2015
Model 1
VA0 (JPN)
Components : Motherboard
- M68K CPU: Signetics SCN68000C8N64
- M68K memory: 2x HM65256BLSP-15 (32Kx8 PSRAM, 150 ns)
- Z80 CPU: Zilog Z0840004PSC
- Z80 memory: TMM2063P - 10 (8Kx8 SRAM, 100 ns)
- I/O chips: Sega 315-5308, Sega 315-5309, Signectic 74LS00N, 74LS161AN, 74F161AN, 74LS74AN (DIP-16)
- VDP: Sega 315-5313 (Yamaha YM7101)
- Video RAM: 2x HM53461ZP-12 (64Kx4 DRAM 120ns)
- Headphone amp: Sony CXA1034
- Video encoder: Sony CXA1145
- FM synthesizer: Yamaha YM2612
VA1 (JPN)
.JPG)
Components:
- M68K CPU: Signetics SCN68000C8N64
- M68K memory: 2x TC51832SPL-10 (32Kx8 PSRAM, 100 ns)
- Z80 CPU: Zilog Z0840004PSC
- Z80 memory: NEC D4168C-20 (8Kx8 XRAM, 200 ns)
- I/O chips: Sega 315-5308, Sega 315-5309, Sega 315-5345 (DIP-16)
- VDP: Sega 315-5313 (Yamaha YM7101)
- Video RAM: 2x HM53461ZP-12 (64Kx4 DRAM 120ns)
- Headphone amp: Sony CXA1034
- Video encoder: Sony CXA1145
- FM synthesizer: Yamaha YM2612
- Capacitors : TK Japan
VA2 (USA, High Definition Graphics)
Components:
- M68K CPU: Signetics SCN68000C8N64
- M68K memory: 2x TC51832SPL-12 (32Kx8 PSRAM, 120 ns)
- Z80 CPU: Zilog Z0840004PSC
- Z80 memory: NEC D4168C-15 (8Kx8 XRAM, 150 ns)
- I/O chips: Sega 315-5308, Sega 315-5309, Sega 315-5345 (DIP-16)
- VDP: Sega 315-5313 (Yamaha YM7101)
- Video RAM: 2x [NUMBER PLEASE] (64Kx4 DRAM)
- Headphone amp: Sony CXA1034
- Video encoder: Sony CXA1145
- FM synthesizer: Yamaha YM2612
VA3
VA4 (PAL)
VA5
VA6 (USA, High Definition Graphics)
Components:
- M68K CPU: Motorola MC68000P8
- M68K memory: 2x HM652568LSP-10 (32Kx8 PSRAM, 100 ns)
- Z80 CPU: Zilog Z0840004PSC
- Z80 memory: MB8464A-10 (8Kx8 SRAM, 100 ns)
- I/O chip: Sega 315-5433
- VDP: Sega 315-5313 (Yamaha YM7101)
- Video RAM: 2x [NUMBER PLEASE] (64Kx4 DRAM)
- Headphone amp: Sony CXA1034
- Video encoder: Sony CXA1145P
- FM synthesizer: Yamaha YM2612
VA6 (PAL)
VA6.8
VA7 (USA)
Model 2
VA0 (PAL)
VA1 (USA)
VA1.8 (USA)
VA1.8 (PAL)
VA1.8 (Asia)
Components:
- M68K CPU: Motorola MC68HC000FN8
- M68K memory: Toshiba TC511632FL-10 (32Kx16 PSRAM, 100 ns)
- Z80 CPU: Toshiba 84C00AU-6
- Z80 memory: [NUMBER PLEASE] (8Kx8 SRAM)
- Main ASIC: Sega 315-5660
VA1.8
VA2
VA2.3
VA3
VA4
Model 3
VA1 (USA)
VA2 (USA)
Components:
- Main ASIC: Sega 315-6123 (contains M68K, Z80, VDP, YM2612, and probably some other components.)
- Memory (right of main ASIC): NEC D4502161G5 (128Kx16 SDRAM)
- Oscillator (bottom-right of main ASIC): SG53 PTR S 53.6931M
- Video Encoder (bottom-left of main ASIC): Sony CXA1645M
- Amplifier (left of main ASIC): TI 85AFTRF LM324