Difference between revisions of "Sega Mega Drive/Genesis Hardware"

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(VA2 NTSC)
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| IC1 || Signetics || SCN68000C8N64 || 8MHz Processor || <center>-</center>
 
| IC1 || Signetics || SCN68000C8N64 || 8MHz Processor || <center>-</center>
 
|-
 
|-
| IC2/IC3 || Toshiba || TC51832SPL-12 || CMOS 256K (32K x 8) Pseudo-SRAM, 12ns || <center>-</center>
+
| IC2/IC3 || Toshiba || TC51832SPL-12 || CMOS 256K (32K x 8-bit) Pseudo-SRAM, 12ns || <center>-</center>
 
|-
 
|-
 
| IC4 || SEGA || 315-5308 || I/O chip || <center>-</center>
 
| IC4 || SEGA || 315-5308 || I/O chip || <center>-</center>
Line 59: Line 59:
 
| IC6 || Zilog || Z0840004PSC || Zilog Z80 8-bit coprocessor || <center>-</center>
 
| IC6 || Zilog || Z0840004PSC || Zilog Z80 8-bit coprocessor || <center>-</center>
 
|-
 
|-
| IC7 || NEC || D4168C-15 || 8,192 x 8-BIT NMOS XRAM, 150 ns || style="text-align: center;"| -
+
| IC7 || NEC || D4168C-15 || 64K (8K x 8) NMOS XRAM, 150 ns || style="text-align: center;"| -
 
|-
 
|-
 
| IC8 || SEGA ||315-5313 (Yamaha YM7101) || VDP || <center>-</center>
 
| IC8 || SEGA ||315-5313 (Yamaha YM7101) || VDP || <center>-</center>
 
|-
 
|-
| IC9/IC10 || ? || ? || Video 256K (64K x 4) DRAM || <center>-</center>
+
| IC9/IC10 || Samsung & NEC || KM424C64Z-10 & D41264V-12 ||256K (64K x 4-bit) VRAM & Dual-Port Graphics Buffer ||<center>-</center>
 
|-
 
|-
| IC11 || Yamaha || YM2612 || frequency modulation synthesizer || <center>-</center>
+
| IC11 || Yamaha || YM2612 || frequency modulation synthesizer (Sound Chip) || style="text-align: center;"| [http://en.wikipedia.org/wiki/Yamaha_YM2612 HERE]
 
|-
 
|-
| IC12 || Sony || CXA1034 || Headphone amp || <center>-</center>
+
| IC12 || Sony || A1034(CXA1034P/M)|| Headphone amp || style="text-align: center;"| [http://www.datasheetcatalog.org/datasheet/sony/06800809.pdf HERE]
 
|-
 
|-
| IC13 || Sony || CXA1145 || Video encoder || <center>-</center>
+
| IC13 || Sony || CXA1145 || Video encoder || style="text-align: center;"| [http://pdf1.alldatasheet.com/datasheet-pdf/view/77343/SONY/CXA1145P.html HERE]
 
|-
 
|-
| IC14 || ? || ? || ? || <center>-</center>
+
| IC14 || Hitachi || HA17358 || dual operational amplifier || style="text-align: center;"| [http://www.datasheetcatalog.org/datasheet/HitachiSemiconductor/mXqyszx.pdf HERE]
 
|-
 
|-
| IC15 || ? || ? || ? || <center>-</center>
+
| IC15/IC17 || ? || 7805 || +5V Regulator || <center>-</center>
 
|-
 
|-
 
| IC16 || Sega || 315-5345 (DIP16) || I/O chip || <center>-</center>
 
| IC16 || Sega || 315-5345 (DIP16) || I/O chip || <center>-</center>
 
|}
 
|}
 
  
 
===VA3===
 
===VA3===

Revision as of 05:23, 25 May 2013

Sega Mega Drive Motherboard revisions

Model 1

VA1

IC BD M5 VA1.jpg

Board label: IC BD M5 VA1

Model 1 VA1 IC's
IC# Brand Name Description Documentation
IC1 Signetics SCN68000C8N64 8MHz Processor
-
IC2/IC3 Toshiba TC51832SPL-12 CMOS 256K (32K x 8) Pseudo-SRAM, 12ns
-
IC4 SEGA 315-5308 I/O chip
-
IC5 SEGA 315-5309 I/O chip
-
IC6 Zilog Z0840004PSC Zilog Z80 8-bit coprocessor
-
IC7 NEC D4168C-15-SG 64K (8,192 x 8-BIT) NMOS XRAM -
IC8 SEGA 315-5313 (Yamaha YM7101) VDP
-
IC9/IC10 ? ? Video 256K (64K x 4) DRAM
-
IC11 Yamaha YM2612 frequency modulation synthesizer
-
IC12 Sony CXA1034 Headphone amp
-
IC13 ? ? ?
-
IC14 ? ? ?
-
IC15 ? ? ?
-
IC16 Sega 315-5339 (DIP16) I/O chip
-


VA2 NTSC

NTSC Model 1 VA2

Board label: IC BD M5 USA VA2

NTSC Model 1 VA2 IC's
IC# Brand Name Description Documentation
IC1 Signetics SCN68000C8N64 8MHz Processor
-
IC2/IC3 Toshiba TC51832SPL-12 CMOS 256K (32K x 8-bit) Pseudo-SRAM, 12ns
-
IC4 SEGA 315-5308 I/O chip
-
IC5 SEGA 315-5309 I/O chip
-
IC6 Zilog Z0840004PSC Zilog Z80 8-bit coprocessor
-
IC7 NEC D4168C-15 64K (8K x 8) NMOS XRAM, 150 ns -
IC8 SEGA 315-5313 (Yamaha YM7101) VDP
-
IC9/IC10 Samsung & NEC KM424C64Z-10 & D41264V-12 256K (64K x 4-bit) VRAM & Dual-Port Graphics Buffer
-
IC11 Yamaha YM2612 frequency modulation synthesizer (Sound Chip) HERE
IC12 Sony A1034(CXA1034P/M) Headphone amp HERE
IC13 Sony CXA1145 Video encoder HERE
IC14 Hitachi HA17358 dual operational amplifier HERE
IC15/IC17 ? 7805 +5V Regulator
-
IC16 Sega 315-5345 (DIP16) I/O chip
-

VA3

VA4 PAL

Board label: IC BD M5 PAL VA4

PAL Model 1 VA4 IC's
IC# Brand Name Description Documentation
IC1 Signetics SCN68000C8N64 8MHz Processor
-
IC2/IC3 Toshiba TC51832SPL-12 CMOS 256K (32K x 8) Pseudo-SRAM, 12ns
-
IC4 SEGA ? I/O chip
-
IC5 SEGA ? I/O chip
-
IC6 Zilog Z0840004PSC Zilog Z80 8-bit coprocessor
-
IC7 NEC D4168C-15 8,192 x 8-BIT NMOS XRAM, 150 ns -
IC8 ? ? ?
-
IC9/IC10 ? ? ?
-
IC11 Yamaha YM2612 frequency modulation synthesizer
-
IC12 ? ? ?
-
IC13 ? ? ?
-
IC14 ? ? ?
-


VA5

The only difference is the IC4 315-5402

VA6

The only difference is the IC4 315-5433

PAL model 1 M5

Board label: IC BD M5 PAL

PAL Model 1 M5 VA6 IC's
IC# Brand Name Description Documentation
IC1 Hitachi HD68HC000P8 8MHz Processor
-
IC2/IC3 Motorola MCM51L832ASP10 CMOS 1024 BIT SRAM
-
IC4 SEGA 315-5433 I/O chip
-
IC5 SEGA 315-5313A I/O chip
-
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 ? ? ?
-


VA6.8

VA7 NTSC

NTSC Model 1 VA7

Board label: PC BD M5 USA VA7

NTSC Model 1 VA7 IC's
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
HERE
IC11 SONY CXA1145M Video
-
IC12 ? TA7805S Voltage regulator
-

Model 2

VA0 PAL

VA1 NTSC

NTSC Model 2 VA1

Board label: PC BD MD2 VA1 USA

NTSC Model 2 VA1 IC's
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
-

VA1 ASIA

VA1.8 NTSC

VA1.8 PAL

PAL model 2 VA1.8

Board label: PC BD MD2 VA1.8 PAL

PAL Model 2 VA1.8 IC's
IC# Brand Name Description Documentation
IC1 Motorola MC68HC000FN8 Processor
-
IC2 ? 651632DFP-15 SOP 40W
-
IC3 ? ? ?
-
IC4 Zilog Z84C0006FEC Zilog Z80 8-bit coprocessor
-
IC5 ? ? ?
-
IC6 SEGA 315-5660 ?
-
IC7 Hitachi HM53861J-8 RAM chip
-
IC8 ? ? ?
-
IC9/IC10 Rohm BA10324AF ground sense quad op-amp
-
IC11 Fujitsu MB3514 RGB Encoder HERE
IC12 ? ? Voltage regulator
-


VA1.8 ASIA

VA2

Board label: PC BD MD2 VA2 USA

PAL Model 2 VA1.8 IC's
IC# Brand Name Description Documentation
IC1 Motorola MC68HC000FN12 Processor
-
IC2 Sanyo LC331632M-12 512K (32768 words X 16 bits) Pseudo-SRAM
IC3 Rohm BA10358 Dual ground sense operational amplifier
-
IC4 Zilog Z84C0006FEC Zilog Z80 8-bit coprocessor
-
IC5 ? XL J6265AF-10SL
-
IC6 Sega 315-5786 (Toshiba T9N13BF)
-
IC7 Samsung KM428C64J-10 64K x 8 Bit CMOS Video RAM
-
IC8 Yamaha YM2612 frequency modulation synthesize
-
IC9/IC10
-
IC11 Voltage Regulator -
IC12 Sega 315-5684 (Rohm BA6166FS) SOUND NETWORK/HEADPHONE AMP
-
IC13 Sanken SKA2195D RGB Encoder
-

VA2.3

VA3

VA4

Model 3

VA1

VA2

Notes

Most of the time the main SEGA IC's are based on/renamed chips from other brands as follows:

  • MD1 VA0, VA1, VA2, VA3, VA4, VA5, VA6, VA6.8
Yamaha YM7101 / FC1001 = Sega 315-5313 / 315-5313A / 315-5313A-01
  • MD1 VA7 & MD2 VA0, VA1, VA1.8, VA3
Yamaha FC1004 = Sega 315-5487 / 315-5487-01 / 315-5487-10 / 315-5660 / 315-5660-02 / 315-5708 / 315-5708-01
Yamaha FF1004 = Sega 315-5700
  • MD2 VA2, VA2.3
Toshiba T9N13BF = Sega 315-5786
Toshiba TC6158AF = ???
  • MD2 VA4 & GEN3 VA1
Yamaha FJ3002 = Sega 315-5960
  • GEN3 VA2
Yamaha FQ8007 = Sega 315-6123

See Also