Difference between revisions of "Sega Mega Drive/Hardware revisions"
From Sega Retro
(Linked photo of MD2 VA1 PAL) |
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+ | {{back}} | ||
+ | {{cleanup}} | ||
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==Model 1== | ==Model 1== | ||
− | = | + | {{sectionsNewStart|imagewidths=320px}} |
− | + | {{SectionsNew | |
− | + | | name=VA0 (JPN) | |
− | Components : | + | | image=Mega_Drive_JPN_VA0.png |
+ | | desc=Components: | ||
*M68K CPU: Signetics SCN68000C8N64 | *M68K CPU: Signetics SCN68000C8N64 | ||
Line 11: | Line 15: | ||
*I/O chips: Sega 315-5308, Sega 315-5309, Signectic 74LS00N, 74LS161AN, 74F161AN, 74LS74AN (DIP-16) | *I/O chips: Sega 315-5308, Sega 315-5309, Signectic 74LS00N, 74LS161AN, 74F161AN, 74LS74AN (DIP-16) | ||
*VDP: Sega 315-5313 (Yamaha YM7101) | *VDP: Sega 315-5313 (Yamaha YM7101) | ||
− | *Video RAM: 2x HM53461ZP-12 (64Kx4 | + | *Video RAM: 2x HM53461ZP-12 (64Kx4 VRAM 120 ns) |
*Headphone amp: Sony CXA1034 | *Headphone amp: Sony CXA1034 | ||
*Video encoder: Sony CXA1145 | *Video encoder: Sony CXA1145 | ||
*FM synthesizer: Yamaha YM2612 | *FM synthesizer: Yamaha YM2612 | ||
− | + | Due to a last-minute issue with the VDP in H40 mode, additional clock circuitry had to be added during manufacturing. This circuitry is present on a daughterboard in the center of the PCB, and contains the master oscillator (53.6931 MHz, NTSC), a 74LS74 (dual D-type flip-flops), and two 74LS161s (4-bit counter). | |
− | |||
− | Components: | + | An issue in the hardware causes the RAM memory to not completely initialize when the game starts, causing crashes in [[Osomatsu-kun Hachamecha Gekijou]]. |
+ | }} | ||
+ | {{SectionsNew | ||
+ | | name=VA1 (JPN) | ||
+ | | image=Megadrive_VA1_Produced_unit_99N83420_(JPN).JPG | ||
+ | | desc=Components: | ||
*M68K CPU: Signetics SCN68000C8N64 | *M68K CPU: Signetics SCN68000C8N64 | ||
*M68K memory: 2x TC51832SPL-10 (32Kx8 PSRAM, 100 ns) | *M68K memory: 2x TC51832SPL-10 (32Kx8 PSRAM, 100 ns) | ||
*Z80 CPU: Zilog Z0840004PSC | *Z80 CPU: Zilog Z0840004PSC | ||
*Z80 memory: NEC D4168C-20 (8Kx8 XRAM, 200 ns) | *Z80 memory: NEC D4168C-20 (8Kx8 XRAM, 200 ns) | ||
− | *I/O chips: Sega 315-5308, Sega 315-5309, Sega 315- | + | *I/O chips: Sega 315-5308, Sega 315-5309, Sega 315-5339 (DIP-16) |
*VDP: Sega 315-5313 (Yamaha YM7101) | *VDP: Sega 315-5313 (Yamaha YM7101) | ||
− | *Video RAM: 2x HM53461ZP-12 (64Kx4 | + | *Video RAM: 2x HM53461ZP-12 (64Kx4 VRAM 120 ns) |
*Headphone amp: Sony CXA1034 | *Headphone amp: Sony CXA1034 | ||
*Video encoder: Sony CXA1145 | *Video encoder: Sony CXA1145 | ||
*FM synthesizer: Yamaha YM2612 | *FM synthesizer: Yamaha YM2612 | ||
*Capacitors : TK Japan | *Capacitors : TK Japan | ||
+ | }} | ||
− | + | {{SectionsNew | |
− | + | | name=VA2 (USA, High Definition Graphics) | |
− | + | | image=MD1_IC_BD_M5_USA_VA2.jpg | |
− | Components: | + | | desc=Components: |
*M68K CPU: Signetics SCN68000C8N64 | *M68K CPU: Signetics SCN68000C8N64 | ||
*M68K memory: 2x TC51832SPL-12 (32Kx8 PSRAM, 120 ns) | *M68K memory: 2x TC51832SPL-12 (32Kx8 PSRAM, 120 ns) | ||
Line 42: | Line 51: | ||
*I/O chips: Sega 315-5308, Sega 315-5309, Sega 315-5345 (DIP-16) | *I/O chips: Sega 315-5308, Sega 315-5309, Sega 315-5345 (DIP-16) | ||
*VDP: Sega 315-5313 (Yamaha YM7101) | *VDP: Sega 315-5313 (Yamaha YM7101) | ||
− | *Video RAM: 2x [NUMBER PLEASE] (64Kx4 | + | *Video RAM: 2x [NUMBER PLEASE] (64Kx4 VRAM) |
+ | *Headphone amp: Sony CXA1034 | ||
+ | *Video encoder: Sony CXA1145 | ||
+ | *FM synthesizer: Yamaha YM2612 | ||
+ | }} | ||
+ | {{SectionsNew | ||
+ | | name=VA3 (USA, High Definition Graphics) | ||
+ | | image=Genesis_1_VA_3_Serial_No_-_31X21232.jpg | ||
+ | | desc=Components: | ||
+ | *M68K CPU: Motorola MC68000P8 | ||
+ | *M68K memory: 2x HM65256BL-10 (32Kx8 PSRAM, 100 ns) | ||
+ | *Z80 CPU: Zilog Z0840004PSC | ||
+ | *Z80 memory: KM6264BL-10 (8Kx8 SRAM, 100 ns) | ||
+ | *I/O chips: Sega 315-5308, Sega 315-5309 | ||
+ | *VDP: Sega 315-5313 (Yamaha YM7101) | ||
+ | *Video RAM: KM424C64Z-10, VKF015 (64Kx4 VRAM) | ||
*Headphone amp: Sony CXA1034 | *Headphone amp: Sony CXA1034 | ||
*Video encoder: Sony CXA1145 | *Video encoder: Sony CXA1145 | ||
*FM synthesizer: Yamaha YM2612 | *FM synthesizer: Yamaha YM2612 | ||
− | === | + | *Capacitors : Taicon, Chhsi |
− | + | }} | |
− | + | {{SectionsNew | |
− | + | | name=VA4 (JPN) | |
− | === | + | | image=SegaMegadriveVA4Board.jpg |
− | + | | desc=Components: | |
− | + | *M68K CPU: Signetics SCN68000C8N64 | |
− | + | *M68K memory: 2x TC51832SP-12 | |
− | + | *Z80 CPU: Zilog Z0840004PSC | |
− | Components: | + | *Z80 memory: NEC D4168C-15-SG |
+ | *I/O chips: Sega 315-5364, Sega 315-5309 | ||
+ | *VDP: Sega 315-5313 (Yamaha YM7101) | ||
+ | *Headphone amp: Sony CXA1034P | ||
+ | *Video encoder: Sony CXA1145P | ||
+ | *FM synthesizer: Yamaha YM2612 | ||
+ | }} | ||
+ | {{SectionsNew | ||
+ | | name=VA4 (PAL) | ||
+ | | image=IC BD M5 PAL VA4.jpg | ||
+ | | desc=Components: | ||
+ | *M68K CPU: Motorola MC68000P8 | ||
+ | *M68K memory: Hitachi HM65256BLSP-10 (32Kx8 PSRAM, 100 ns) | ||
+ | *I/O chip: Sega 315-5364, Sega 315-5309 | ||
+ | *Z80 CPU: Zilog Z0840004PSC | ||
+ | *Z80 memory: Sanyo LC3664RL (8Kx8 SRAM, 120 ns) | ||
+ | *VDP: Sega 315-5313 (Yamaha YM7101) | ||
+ | *Video RAM: Fujitsu MB81461-12 (64Kx4 VRAM) | ||
+ | *Headphone amp: Sony CXA1034P | ||
+ | *Video encoder: Sony CXA1145P RGB Encoder | ||
+ | *FM synthesizer: Yamaha YM2612 | ||
+ | *Dual Operational Amplifier: Ti LM358P | ||
+ | }} | ||
+ | {{SectionsNew | ||
+ | | name=VA5 (JPN) | ||
+ | | image=Mega Drive PCB IC BD M5 VA5.jpg | ||
+ | | desc= | ||
+ | }} | ||
+ | {{SectionsNew | ||
+ | | name=VA6 (JPN) | ||
+ | | image=Mega Drive PCB IC BD M5 VA6.jpg | ||
+ | | desc=The first Japanese revision with the [[TradeMark Security System|TMSS]]. | ||
+ | }} | ||
+ | {{SectionsNew | ||
+ | | name=VA6 (USA, High Definition Graphics) | ||
+ | | image=MD1_IC_BD_M5_USA_VA6.jpg | ||
+ | | desc=Components: | ||
*M68K CPU: Motorola MC68000P8 | *M68K CPU: Motorola MC68000P8 | ||
*M68K memory: 2x HM652568LSP-10 (32Kx8 PSRAM, 100 ns) | *M68K memory: 2x HM652568LSP-10 (32Kx8 PSRAM, 100 ns) | ||
Line 66: | Line 126: | ||
*Video encoder: Sony CXA1145P | *Video encoder: Sony CXA1145P | ||
*FM synthesizer: Yamaha YM2612 | *FM synthesizer: Yamaha YM2612 | ||
− | + | }} | |
− | + | {{SectionsNew | |
− | + | | name=VA6 (PAL) | |
− | + | | image=MD1_IC_BD_M5_PAL_VA6.jpg | |
− | + | | desc= | |
− | + | }} | |
− | + | {{SectionsNew | |
− | + | | name=VA6.8 | |
+ | | image=Model_v6.8.jpg | ||
+ | | desc= | ||
+ | }} | ||
+ | {{SectionsNew | ||
+ | | name=VA7 (USA) | ||
+ | | image=PC BD M5 USA VA7.jpg | ||
+ | | desc= | ||
+ | }} | ||
+ | |} | ||
==Model 2== | ==Model 2== | ||
− | = | + | {{sectionsNewStart|imagewidths=320px}} |
− | + | {{SectionsNew | |
− | ===VA1 (USA)= | + | | name=VA0 (JPN) |
− | + | | image=MD2 JAPAN PCB VA0 UP.jpg | |
− | + | | desc= | |
− | + | }} | |
− | + | {{SectionsNew | |
+ | | name=VA0 (PAL) | ||
+ | | image=PC BD MD2 VA0 PAL.jpg | ||
+ | | desc= | ||
+ | }} | ||
+ | {{SectionsNew | ||
+ | | name=VA0 (USA) | ||
+ | | image=PC BD MD2 VA0 USA.jpg | ||
+ | | desc=Components: | ||
+ | *M68K CPU: Hitachi HD68HC000CP8 | ||
+ | *M68K memory: Toshiba TC51832AFL-10 | ||
+ | *Z80 CPU: Toshiba 84C00AU-6 | ||
+ | *Main ASIC: Sega 315-5487-01 | ||
+ | *Video Encoder: Samsung KA2195D | ||
+ | *Amplifier: Texas Instruments 311223J | ||
+ | }} | ||
+ | {{SectionsNew | ||
+ | | name=VA1 (USA) | ||
+ | | image=MD2 US PCB Top VA1.jpg | ||
+ | | desc= | ||
+ | }} | ||
+ | {{SectionsNew | ||
+ | | name=VA1 (PAL) | ||
+ | | image=PC BD MD2 VA1 PAL.jpg | ||
+ | | desc=Components: | ||
+ | *M68K CPU: Motorola MC68HC000FN8 | ||
+ | *M68K memory: [[Sanyo]] LC331632M-12 | ||
+ | *Z80 CPU: Toshiba 84C00AU-6 | ||
+ | *Main ASIC: Sega 315-5660 | ||
+ | *Video Encoder: Fujitsu MB3514 | ||
+ | *Amplifier: BA10324AF | ||
+ | }} | ||
+ | {{SectionsNew | ||
+ | | name=VA1.8 (USA) | ||
+ | | image=Genesis_2_PCB_VA1.8_serail_040169192.jpg | ||
+ | | desc=PCB Printed by SKS | ||
Components: | Components: | ||
*M68K CPU: Motorola MC68HC000FN8 | *M68K CPU: Motorola MC68HC000FN8 | ||
− | *M68K memory: Sanyo | + | *M68K memory: [[Sanyo]] LC36648ML-10 |
*Z80 CPU: Toshiba 84C00AU-6 | *Z80 CPU: Toshiba 84C00AU-6 | ||
+ | *Main ASIC: Sega 315-5660-02 | ||
+ | *Video Encoder: Samsung KA2195D | ||
+ | *Amplifier: BA10324AF | ||
+ | }} | ||
+ | {{SectionsNew | ||
+ | | name=VA1.8 (USA) | ||
+ | | image=PC_BD_MD2_VA1.8_USA.JPG | ||
+ | | desc=PCB Printed by CMK | ||
+ | Components: | ||
+ | *M68K CPU: Motorola MC68HC000FN8 | ||
+ | *M68K memory: [[Sanyo]] LC331632M-12 | ||
+ | *Z80 CPU: Zilog Z84C0006FEC | ||
+ | *Main ASIC: Sega 315-5660 | ||
+ | *Video Encoder: Samsung KA2195D | ||
+ | *Amplifier: BA10324AF | ||
+ | }} | ||
+ | {{SectionsNew | ||
+ | | name=VA1.8 (PAL) | ||
+ | | image=PC BD MD2 VA1.8 PAL.jpg | ||
+ | | desc=Components: | ||
+ | *M68K CPU: Motorola MC68HC000FN8 | ||
+ | *M68K memory: ??? 651632DFP-15 | ||
+ | *Z80 CPU: Zilog Z84C0006FEC | ||
*Main ASIC: Sega 315-5660 | *Main ASIC: Sega 315-5660 | ||
*Video Encoder: Fujitsu MB3514 | *Video Encoder: Fujitsu MB3514 | ||
− | + | *Amplifier: BA10324AF | |
− | + | }} | |
− | + | {{SectionsNew | |
− | + | | name=VA1.8 (Asia) | |
− | + | | image=PC_BD_MD2_VA1.8_ASIA.jpg | |
− | + | | desc=Components: | |
− | |||
− | |||
− | |||
− | Components: | ||
*M68K CPU: Motorola MC68HC000FN8 | *M68K CPU: Motorola MC68HC000FN8 | ||
*M68K memory: Toshiba TC511632FL-10 (32Kx16 PSRAM, 100 ns) | *M68K memory: Toshiba TC511632FL-10 (32Kx16 PSRAM, 100 ns) | ||
Line 104: | Line 227: | ||
*Z80 memory: [NUMBER PLEASE] (8Kx8 SRAM) | *Z80 memory: [NUMBER PLEASE] (8Kx8 SRAM) | ||
*Main ASIC: Sega 315-5660 | *Main ASIC: Sega 315-5660 | ||
− | + | }} | |
− | == | + | {{SectionsNew |
− | + | | name=VA2 (USA) | |
− | + | | image=PC BD MD2 VA2 USA.jpg | |
− | + | | desc= | |
− | + | }} | |
− | + | {{SectionsNew | |
− | + | | name=VA2.3 (USA) | |
− | + | | image=PC BD MD2 VA2.3 USA.jpg | |
− | + | | desc= | |
− | + | }} | |
− | + | {{SectionsNew | |
+ | | name=VA3 | ||
+ | | image=PC_BD_MD2_VA3_USA_HAL.JPG | ||
+ | | desc= | ||
+ | }} | ||
+ | {{SectionsNew | ||
+ | | name=VA4 | ||
+ | | image=PC_BD_MD2_VA4_171_-_7229B_-_11.JPG | ||
+ | | desc=Components: | ||
+ | *IC1: Sega 315-5960 ASIC | ||
+ | *IC2: 32Kx16 PSRAM | ||
+ | *IC3: Video RAM? | ||
+ | *IC4: Sega 315-5684 audio amplifier | ||
+ | *IC5: Sony CXA1645M video encoder | ||
+ | *IC6: 7805 voltage regulator | ||
+ | This is the first Mega Drive board without any discrete CPUs. Both the 68000 and Z80 are contained with the Sega 315-5960 ASIC, as well as the VDP, YM2612, and I/O controllers. | ||
+ | }} | ||
+ | |} | ||
==Model 3== | ==Model 3== | ||
− | + | {{sectionsNewStart|imagewidths=320px}} | |
− | + | {{SectionsNew | |
− | + | | name=VA1 (USA) | |
− | + | | image=PC BD MD3 VA1 USA.jpg | |
− | + | | desc=Components: | |
− | + | *IC1: Sega 315-5960 ASIC (see above) | |
− | Components: | + | *IC2: Sharp LH5P1632N-15 32Kx16 PSRAM |
+ | *IC5: OKI M54C864-80 512K (64K x 8-bit) VRAM | ||
+ | *IC6: Sony CXA1645M RGB Encoder | ||
+ | *IC7: TI LM324 amplifier | ||
+ | IC3 and IC4 markings are silkscreened but don't correspond to any physical ICs. | ||
+ | }} | ||
+ | {{SectionsNew | ||
+ | | name=VA2 (USA) | ||
+ | | image=PC_BD_MD3_VA2_USA.jpg | ||
+ | | desc=Components: | ||
*Main ASIC: Sega 315-6123 (contains M68K, Z80, VDP, YM2612, and probably some other 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) | *Memory (right of main ASIC): NEC D4502161G5 (128Kx16 SDRAM) | ||
Line 130: | Line 279: | ||
*Video Encoder (bottom-left of main ASIC): Sony CXA1645M | *Video Encoder (bottom-left of main ASIC): Sony CXA1645M | ||
*Amplifier (left of main ASIC): TI 85AFTRF LM324 | *Amplifier (left of main ASIC): TI 85AFTRF LM324 | ||
+ | }} | ||
+ | |} | ||
[[Category:Mega Drive hardware]] | [[Category:Mega Drive hardware]] |
Revision as of 22:12, 2 February 2022
- Back to: Sega Mega Drive.
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Model 1
VA0 (JPN) | |
---|---|
Components:
Due to a last-minute issue with the VDP in H40 mode, additional clock circuitry had to be added during manufacturing. This circuitry is present on a daughterboard in the center of the PCB, and contains the master oscillator (53.6931 MHz, NTSC), a 74LS74 (dual D-type flip-flops), and two 74LS161s (4-bit counter). An issue in the hardware causes the RAM memory to not completely initialize when the game starts, causing crashes in Osomatsu-kun Hachamecha Gekijou. | |
VA1 (JPN) | |
Components:
| |
VA2 (USA, High Definition Graphics) | |
Components:
| |
VA3 (USA, High Definition Graphics) | |
Components:
| |
VA4 (JPN) | |
Components:
| |
VA4 (PAL) | |
Components:
| |
VA5 (JPN) | |
VA6 (JPN) | |
The first Japanese revision with the TMSS. | |
VA6 (USA, High Definition Graphics) | |
Components:
| |
VA6 (PAL) | |
VA6.8 | |
VA7 (USA) | |
Model 2
VA0 (JPN) | |
---|---|
VA0 (PAL) | |
VA0 (USA) | |
Components:
| |
VA1 (USA) | |
VA1 (PAL) | |
Components:
| |
VA1.8 (USA) | |
PCB Printed by SKS
Components:
| |
VA1.8 (USA) | |
PCB Printed by CMK
Components:
| |
VA1.8 (PAL) | |
Components:
| |
VA1.8 (Asia) | |
Components:
| |
VA2 (USA) | |
VA2.3 (USA) | |
VA3 | |
VA4 | |
Components:
This is the first Mega Drive board without any discrete CPUs. Both the 68000 and Z80 are contained with the Sega 315-5960 ASIC, as well as the VDP, YM2612, and I/O controllers. |