Difference between revisions of "Sega System 2"

From Sega Retro
m (Text replacement - "maker=Sega" to "maker=Sega Enterprises, Ltd.")
 
(19 intermediate revisions by 6 users not shown)
Line 4: Line 4:
 
| imgwidth=320
 
| imgwidth=320
 
| name=
 
| name=
−
| maker=[[Sega]]
+
| maker=[[Sega Enterprises, Ltd.]]
−
| releases={{releases
+
| processor=[[Zilog Z80]]
−
| arcade_date_world=1985-09
+
| releases={{releasesArcade
 +
| system_date_world=1985-09
 
}}
 
}}
 
}}
 
}}
−
The '''Sega System 2''' is an arcade platform introduced by [[Sega]] in 1985. While it is a successor to the [[Sega System 1]], it is in fact largely an upgrade, utilising the same [[Z80]] CPU and the same sound chips. The major upgrades of the System 2 are the addition of a ROM board, faster RAM, and a larger 512×512 background scrolling plane.
+
The '''Sega System 2''' (セガ システム 2) is an [[arcade]] platform introduced by [[Sega]] in 1985. It is a successor to the [[Sega System 1]], though largely an upgrade, utilising the same [[Zilog Z80]] CPU, sound chips, and Sega graphics chipset. The major upgrades of the System 2 are the addition of a ROM board, faster [[RAM]], and a larger 512×512 background scrolling plane.
  
 
The System 2 was supported alongside the System 1, with its last game being released in 1988.
 
The System 2 was supported alongside the System 1, with its last game being released in 1988.
  
−
==Technical Specifications==
+
==Technical specifications==
−
* Board composition: Main board & ROM board
+
:''See [[Sega System 1#Technical specifications|Sega System 1 Specifications]] for details on underlying System 1 specifications.''
−
* Main CPU: [[Zilog Z80]] @ 4 MHz (8-bit & 16-bit instructions @ 0.58 [[wikipedia:Instructions per second|MIPS]])
+
 
−
* Sound CPU: Zilog Z80 @ 4 MHz (8-bit & 16-bit instructions @ 0.58 MIPS)
+
The following are changes that System 2 made to System 1 specifications.
−
* [[wikipedia:Sound chip|Sound chips]]: Sega [[SN76489|SN76496]] @ 4 MHz, Sega SN76496 @ 2 MHz
+
 
−
* GPU chipset:
+
* Board composition: Main board + [[ROM]] board
−
** Sega 315-5011 sprite line comparator
+
* [[Tile Layer|Tilemap]] planes: 2 background layers (1 static, 1 scrolling), 8×8 tiles
−
** Sega 315-5012 sprite generator
+
:* Tilemap sizes: 512×512 for scrolling plane, 256×256 for fixed plane{{ref|https://github.com/mamedev/mame/tree/master/src/mame/video/system1.cpp}}
−
** 315-5049 tilemap chip
+
 
−
* [[wikipedia:Microcontroller|MCU]]: Intel 8751 {{ref|https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp}}
+
===Memory===
 
{{multicol|
 
{{multicol|
−
* [[RAM]]: 82 [[Byte|KB]], including 32.5 KB high-speed [[SRAM]] (Static RAM) {{ref|https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp}}
+
* Memory: 385.5–487.5 KB (100–106 KB main, 251.5–347.5 KB video, 34 KB sound)
−
** Main: 4 KB
+
* [[RAM]]: 32.5 [[Byte|KB]] ([[SRAM]]){{ref|https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp}}
−
** [[VRAM|Video]]: 12 KB (4 KB video, 2 KB sprites, 2 KB palette, 4 KB collision)
+
:* Main: 4 KB
−
** Sound: 2 KB
+
:* [[VRAM|Video]]: 26.5 KB (4 KB video, 2 KB [[sprite]] attributes, 1.5 KB sprite line buffers, 2 KB palette, 4 KB collision)
−
** MCU: 64 KB
+
:* Sound: 2 KB
−
* Video resolution: 256×224 (display), 640×260 (overscan)
+
* [[ROM]]: 353–455 KB
−
** Refresh rate: 60.0952 Hz (V-sync)
+
:* Main: 96–102 KB
−
* [[Palette|Color palette]]: 4096
+
:* Video: 225–321 KB (96 KB tiles, 128–224 KB sprites, 1 KB palette)
−
** Colors on screen: 2048
+
:* Sound: 32 KB
−
* [[Tile Layer|Tilemap]] planes: 2 background layers (1 static, 1 scrolling), 8×8 tiles
+
}}
−
** Tilemap sizes: 512×512 for scrolling plane and 256×256 for fixed plane {{ref|https://github.com/mamedev/mame/tree/master/src/mame/video/system1.cpp}}
+
 
−
* [[Sprite]]s: Dual line buffers, double buffering, 32 sprites per scanline, 16 colors per sprite, sprite flipping, hardware collision detection
+
==List of games==
−
** Sprite sizes: 8 to 256 pixels width, 8 to 256 pixels height
+
{{BulletPointGameList|SYS2}}
−
** Pixel clock cycles: 10 MHz (60.0952 Hz refresh rate)
+
 
−
** Sprite pixel/texel fillrate: 10 million pixels/texels per second, 166,402 pixels/texels per frame (260 scanlines), 640 sprite pixels/texels per scanline
+
==Production credits==
 +
{{creditstable|
 +
*[[Hiroshi Yagi]]
 +
| source=Developer mentions{{ref|https://web.archive.org/web/20210205150032/https://www.4gamer.net/games/999/G999905/20210126043/}}
 +
| console=Arcade
 
}}
 
}}
  
−
==Gallery==
+
==Photo gallery==
 
<gallery>
 
<gallery>
−
File:System2 PCB.jpg|PCB
+
System2 PCB.jpg|PCB
 
</gallery>
 
</gallery>
  
−
==List of Games==
+
==References==
−
{{multicol|
+
<references/>
−
* ''[[Heavy Metal]]'' (1985)
 
−
* ''[[Choplifter]]'' (1985)
 
−
* ''[[Shooting Master]]'' (1985)
 
−
* ''[[119]]'' (1986)
 
−
* ''[[Warball]]'' (1986)
 
−
* ''[[Wonder Boy]]'' (also released on [[Sega System 1]]) (1986)
 
−
* ''[[Dakkochan House]]'' (1987)
 
−
* ''[[Toki no Senshi: Chrono Soldier]]'' (1987)
 
−
* ''[[Wonder Boy in Monster Land]]'' (1987)
 
−
* ''[[UFO Senshi Youko Chan]]'' (1988)
 
−
}}
 
  
 
{{Sega Arcade Boards}}
 
{{Sega Arcade Boards}}
 
[[Category:Sega System series]]
 
[[Category:Sega System series]]

Latest revision as of 08:09, 16 November 2024

System2 PCB.jpg
Sega System 2
Manufacturer: Sega Enterprises, Ltd.
Release Date RRP Code
Arcade
World		 ? ?




































The Sega System 2 (セガ システム 2) is an arcade platform introduced by Sega in 1985. It is a successor to the Sega System 1, though largely an upgrade, utilising the same Zilog Z80 CPU, sound chips, and Sega graphics chipset. The major upgrades of the System 2 are the addition of a ROM board, faster RAM, and a larger 512×512 background scrolling plane.

The System 2 was supported alongside the System 1, with its last game being released in 1988.

Technical specifications

See Sega System 1 Specifications for details on underlying System 1 specifications.

The following are changes that System 2 made to System 1 specifications.

  • Board composition: Main board + ROM board
  • Tilemap planes: 2 background layers (1 static, 1 scrolling), 8×8 tiles
  • Tilemap sizes: 512×512 for scrolling plane, 256×256 for fixed plane[1]

Memory

  • Memory: 385.5–487.5 KB (100–106 KB main, 251.5–347.5 KB video, 34 KB sound)
  • RAM: 32.5 KB (SRAM)[2]
  • Main: 4 KB
  • Video: 26.5 KB (4 KB video, 2 KB sprite attributes, 1.5 KB sprite line buffers, 2 KB palette, 4 KB collision)
  • Sound: 2 KB
  • ROM: 353–455 KB
  • Main: 96–102 KB
  • Video: 225–321 KB (96 KB tiles, 128–224 KB sprites, 1 KB palette)
  • Sound: 32 KB

List of games

Production credits

Source:
Developer mentions[3]


Photo gallery

  • PCB

References

  1. ↑ https://github.com/mamedev/mame/tree/master/src/mame/video/system1.cpp
  2. ↑ https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp
  3. ↑ https://www.4gamer.net/games/999/G999905/20210126043/ (Wayback Machine: 2021-02-05 15:00)


Sega arcade boards
Originating in arcades









Console-based hardware








84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14









































PC-based hardware








05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23





























Retrieved from "https://segaretro.org/index.php?title=Sega_System_2&oldid=1036818"