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This page is used to document details of the hardware for the [[Sega Mega Drive/Genesis]].
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Sega Mega Drive Motherboard revisions
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==Model 1==
  
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== Model 1 ==
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===VA1 [IC BD M5 VA1]===
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[[File:IC_BD_M5_VA1.jpg|200px|center]]
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=== VA1 [IC BD M5 VA1] ===
 
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<gallery>
 
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IC_BD_M5_VA1.jpg
 
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</gallery>
 
  
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
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|}
 
|}
  
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=== VA2 [IC BD M5 USA VA2] 837-6992 ===
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<br />
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<gallery>
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===VA2 [IC BD M5 USA VA2] 837-6992===
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IC_BD_M5_USA_VA2.jpg
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[[File:IC_BD_M5_USA_VA2.jpg|200px|center]]
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</gallery>
 
  
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
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|}
 
|}
  
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=== VA3 [IC BD M5 USA VA3] 837-7071 ===
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<br />
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===VA3 [IC BD M5 USA VA3] 837-7071===
  
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
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|}
 
|}
  
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=== VA4 [IC BD M5 PAL VA4] ===
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<br />
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===VA4 [IC BD M5 PAL VA4]===
  
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
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|}
 
|}
  
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=== VA5 ===
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<br />
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The only difference is the IC4 315-5402.
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===VA5===
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The only difference is the IC4 315-5402
  
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=== VA6 [IC BD M5 PAL] ===
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<br />
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<gallery>
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===VA6 [IC BD M5 PAL]===
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Genesis_pal_model1_M5.jpg
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[[File:Genesis_pal_model1_M5.jpg|200px|center]]
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</gallery>
 
  
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
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|}
 
|}
  
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=== VA6 [IC BD M5 USA VA6] ===
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<br />
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===VA6 [IC BD M5 USA VA6]===
  
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
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|}
 
|}
  
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=== VA7 [PC BD M5 USA VA7] 171-6217-11 ===
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<br />
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<gallery>
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===VA6.8===
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PC_BD_M5_USA_VA7.jpg
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</gallery>
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<br />
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===VA7 [PC BD M5 USA VA7] 171-6217-11===
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[[File:PC_BD_M5_USA_VA7.jpg|200px|center]]
  
 
The VA7 is almost a Genesis 2 PCB in a Genesis 1 case. It even shares the same PCB prefix (PC).
 
The VA7 is almost a Genesis 2 PCB in a Genesis 1 case. It even shares the same PCB prefix (PC).
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| CE10 ||  220 μF  ||10 V
 
| CE10 ||  220 μF  ||10 V
 
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|-
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| CE11 || 10 μF ||16 V
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| CE11 ||  ||
 
|-
 
|-
 
| CE12 ||  220 μF  ||10 V
 
| CE12 ||  220 μF  ||10 V
 
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|-
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| CE13 || 10 μF ||16 V
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| CE13 ||  ||
 
|-
 
|-
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| CE14 || 10 μF ||16 V
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| CE14 ||  ||
 
|-
 
|-
 
| CE15 ||  10 μF  ||16 V
 
| CE15 ||  10 μF  ||16 V
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| CE17 ||  100 μF  ||10 V
 
| CE17 ||  100 μF  ||10 V
 
|-
 
|-
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| CE18 || 47 μF ||10 V
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| CE18 ||  ||
 
|-
 
|-
 
| CE19 ||  47 μF  ||10 V
 
| CE19 ||  47 μF  ||10 V
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| CE22 ||  10 μF  ||16 V
 
| CE22 ||  10 μF  ||16 V
 
|-
 
|-
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| CE23 || 100 μF ||10 V
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| CE23 ||  ||
 
|-
 
|-
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| CE24 || 47 μF ||10 V
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| CE24 ||  ||
 
|-
 
|-
 
| CE25 ||  47 μF  ||10 V
 
| CE25 ||  47 μF  ||10 V
 
|-
 
|-
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| CE26 || 47 μF ||10 V
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| CE26 ||  ||
 
|-
 
|-
 
| CE27 ||  47 μF  ||10 V
 
| CE27 ||  47 μF  ||10 V
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| CE30 ||  10 μF  ||16 V
 
| CE30 ||  10 μF  ||16 V
 
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|-
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| CE31 || 100 μF ||10 V
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| CE31 ||  ||
 
|-
 
|-
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! Totals !! !!
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| CE32 ||  ||
 
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|-
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| 17 || 10 μF || 16 V
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| CE33 || ||
 
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|-
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| 7 || 47 μF || 10 V
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| CE34 || ||
 
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|-
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| 3 || 100 μF || 10 V
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| CE35 ||  ||
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|-
 
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|  4 || 220 μF || 10 V
 
 
|}
 
|}
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[[Category:Sega Genesis]]
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[[Category:Hardware]]
  
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== Model 2 ==
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==Model 2==
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===VA0 PAL===
  
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=== VA1 [PC BD MD2 VA1 USA] ===
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<br />
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<gallery>
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Model2_va1_motherboard.jpg
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===VA1 [PC BD MD2 VA1 USA]===
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</gallery>
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[[File:Model2_va1_motherboard.jpg|200px|center]]
  
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
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|}
 
|}
  
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=== VA1.8 [PC BD MD2 VA1.8 USA] ===
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<br />
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<gallery>
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PC_BD_MD2_VA1.8_USA.jpg
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===VA1 ASIA===
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</gallery>
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<br />
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===VA1.8 [PC BD MD2 VA1.8 USA]===
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[[File:PC_BD_MD2_VA1.8_USA.jpg|200px|center]]
  
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
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|}
 
|}
  
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=== VA1.8 [PC BD MD2 VA1.8 PAL] ===
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<br />
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<gallery>
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Genesis_pal_model2_VA1.8.jpg
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===VA1.8 [PC BD MD2 VA1.8 PAL]===
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</gallery>
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[[File:Genesis_pal_model2_VA1.8.jpg||200px|center]]
  
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
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|}
 
|}
  
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=== VA1.8 [PC BD MD2 VA1.8 ASIA] ===
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<br />
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<gallery>
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PC_BD_MD2_VA1.8_ASIA.jpg
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===VA1.8 [PC BD MD2 VA1.8 ASIA]===
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</gallery>
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[[File:PC_BD_MD2_VA1.8_ASIA.jpg|200px|center]]
  
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
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|}
 
|}
  
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=== VA2 [PC BD MD2 VA2 USA] ===
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<br />
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===VA2 [PC BD MD2 VA2 USA]===
  
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
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|}
 
|}
  
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=== VA2.3 [PC BD MD2 VA2.3 USA] ===
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<br />
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<gallery>
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PC_BD_MD2_VA2.3_USA_HAL.jpg
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===VA2.3 PC BD MD2 VA2.3 USA===
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</gallery>
 
  
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
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|}
 
|}
  
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=== VA3 [PC BD MD2 VA3 USA HAL] ===
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<br />
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<gallery>
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PC_BD_MD2_VA3_USA_HAL.jpg
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===VA3 [PC BD MD2 VA3 USA HAL]===
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</gallery>
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[[File:PC_BD_MD2_VA3_USA_HAL.jpg|200px|center]]
  
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
 
{| class="mw-collapsible mw-collapsed wikitable" style="width: 600px;" style="text-align: center;"
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|}
 
|}
  
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== Notes ==
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<br />
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===VA4===
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==Model 3==
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===VA1===
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===VA2===
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==Notes==
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Most of the time the main SEGA IC's are based on/renamed chips from other brands as follows:
 
Most of the time the main SEGA IC's are based on/renamed chips from other brands as follows:
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*MD1 VA0, VA1, VA2, VA3, VA4, VA5, VA6, VA6.8
 
*MD1 VA0, VA1, VA2, VA3, VA4, VA5, VA6, VA6.8
 
: Yamaha YM7101 / FC1001 = Sega 315-5313 / 315-5313A / 315-5313A-01
 
: Yamaha YM7101 / FC1001 = Sega 315-5313 / 315-5313A / 315-5313A-01
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: Yamaha FQ8007 = Sega 315-6123
 
: Yamaha FQ8007 = Sega 315-6123
  
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== See also ==
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==See Also==
 
*[[Sega Genesis]]
 
*[[Sega Genesis]]
 
*[[Sega Genesis Cartridge]]
 
*[[Sega Genesis Cartridge]]
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[[Category:Sega Genesis]]
 
[[Category:Sega Genesis]]
 
[[Category:Hardware]]
 
[[Category:Hardware]]

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