Difference between revisions of "Sega Y Board"

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Sega Y Board

Manufacturer: Sega Enterprises, Ltd.

Release	Date	RRP	Code
JP	1988-04	¥?	?
UK	1988-07	£?	?
World	1988	?	?

The Sega Y Board is an arcade system board released by Sega in 1988 as a successor to the Sega X Board. Like the X Board before it, the Y Board was known for its 3D sprite/texture manipulation capabilities. It is the fourth in the Super Scaler series of arcade boards, after the Sega Hang-On hardware, Sega OutRun hardware and X Board.

The Y Board is quite different to the X Board in terms of design, offering a third CPU and more advanced video hardware. The Y Board allows for real-time rotation of sprites as well as scaling. It also has more memory and a higher fillrate than its predecessor, and can display significantly more sprites/textures on screen. Unusually, the system uses no tile layers (but only a single bitmap plane is used for the background), so graphics are rendered using only sprites/textures (a design taken by SNK for their Neo-Geo hardware in 1990).

The Y Board debuted with Galaxy Force in early 1988. It was succeeded by the Sega System 32 in 1990.

Technical specifications

Y Board specifications

Board composition: CPU Board + Video Board
CPU:

Main CPU: 3× MC68000 @ 12.5 MHz (16-bit & 32-bit instructions @ 6.563 MIPS)

The first 68000 ("main" in MAME) has access to the sound hardware, I/O hardware, and 64KB RAM
The second 68000 ("subx" in MAME) has access to the ysprites hardware, backup RAM and 16KB RAM
The third 68000 ("suby" in MAME) has access to the bsprites hardware, ysprites full plane rotation, bsprites palette RAM, and 64KB RAM
The three CPUs share 64KB of separate RAM for communication as well as the multiplier/divider hardware

Sound CPU: Zilog Z80 @ 4 MHz (8-bit & 16-bit instructions @ 0.58 MIPS) with 2KB RAM

Sound chips:

FM synthesis chip: Yamaha YM2151 @ 4 MHz (8 FM channels)
PCM sampling chip: SegaPCM (315-5218) @ 4 MHz (stereo output, 16 PCM channels, 12-bit audio, 31.25 kHz sampling rate)

GPU: Sega Super Scaler chipset^[1]

Graphics board: Sega 837-6566 Video Board @ 50 MHz (315-5196 sprite generator, 315-5213 sprite chip, 315-5242 color encoder, 315-5305 sprite generator, 2× 315-5306 video sync & rotation, 315-5312 video mixer)
Math processors: 315-5248 hardware multiplier, 315-5249 hardware divider

Fixed-point arithmetic capabilities: Z-buffering, depth map^[2]
Memory: Up to 21.3672 MB (1232 KB main, 18.584 MB video, 1618 KB sound)

RAM: 824 KB, including 778 KB high-speed SRAM (Static RAM)^[1]^[3]

Main RAM: 208 KB (64 KB CPU 1, 16 KB CPU 2, 64 KB CPU 3, 64 KB shared)
Video RAM: 598 KB SRAM (64 KB Y-sprites, 4 KB B-sprites, 512 KB dual sprite framebuffers, 2 KB rotation, 16 KB color)
Sound RAM: 18 KB SRAM (2 KB Z80, 16 KB SegaPCM)

ROM: Up to 20.5625 MB (1 MB main, 18 MB video, 1600 KB sound)^[4]

Video resolution: 320×224 (display), 342×262 (overscan),^[1] progressive scan

Scanlines: 224 (display), 262 (overscan)

Refresh rate: 59.6368–60 Hz (V-sync)^[1]

Maximum frame rate: 59.6368–60 FPS

Color palette: 2,097,152 (4096 palette banks with 512 colors each), to 16,777,216 with effects (shadow & highlight, luminosity, palette fade)

Colors on screen: 24,576 (unique colors), to 71,680 (320×224) with luminosity and palette fade^[1]

Video hardware:

Two sprite planes with fixed Z-order
Lower sprite plane ("ysprites" in MAME): full scaling and rotation; also the entire plane can be rotated as a whole

Palettes are stored alongside the sprite table; sprite table entries hold a pointer to the palette, which itself is stored as an table of palette indirection values (?)

Higher sprite plane ("bsprites" in MAME): standard Sega System 16B sprite plane

Graphical planes: Three layers

B-sprite (front plane) layer: Priority on top, based on System 16B (line buffer) sprite system
Y-sprite (back plane) layer: Plugs into a full-screen rotation, large fillrate, double-buffered framebuffers (based on X Board) that can be fully rotated^[5]
Sky gradient (background) layer: Bitmap plane

Sprite/texture capabilities: Linked list of sprites, shadow & highlight, palette fade, color rotations, different levels of luminosity, full sprite zooming & scaling on both sprite planes, full sprite framebuffer rotation on Y-sprite plane, double buffering, double-buffered line buffer on B-plane (512 pixels), double-buffered framebuffer on Y-plane^[6]^[1]^[7]

Sprite size/resolution: 8×8 to 512×512 pixels^[8]
Colors per sprite/texture: 16 to 512

Sprites/textures per frame: 2176

Y sprites: 2048 sprites/textures, 64 KB attribute RAM (32 KB bank per framebuffer), 16 bytes per entry^[5]
B sprites: 256 sprites/textures, 4 KB attribute RAM, 16 bytes per entry^[6]
Sprites/textures per second: 2176 (1 FPS) to 130,560 (60 FPS)

Y-plane framebuffer fillrate: 50 MPixels/s

Y-plane clock rate: 50 MHz
Maximum texels per scanline: 3200
Maximum sprites/textures per scanline: 400

B-plane line buffer fillrate: 12.5874 MPixels/s^[6]^[9]

B-plane clock rate: 12.5874 MHz
Maximum texels per scanline: 800
Maximum sprites/textures per scanline: 100

Overall fillrate: 62.5874 MPixels/s

Maximum texels per scanline: 4000
Maximum sprites/textures per scanline: 500

Galaxy Force II specifications

Galaxy Force II featured the following upgrades in mid-1988:^[1]

CPU:

Main CPU: 3× MC68000 @ 12.5 MHz (16-bit & 32-bit instructions @ 6.563 MIPS)
Sound CPU: Z80 @ 4 MHz (8-bit & 16-bit instructions @ 0.58 MIPS)
Motor CPU: Z80 @ 8 MHz (8-bit & 16-bit instructions @ 1.16 MIPS)

Memory: Up to 21.4 MB (1232 KB main, 18.584 MB video, 1618 KB sound, 32 KB motor)

RAM: 856 KB, including 778 KB high-speed SRAM (Static RAM)^[1]

Main RAM: 208 KB
Video RAM: 598 KB SRAM
Sound RAM: 18 KB SRAM
Motor RAM: 32 KB

ROM: Up to 20.5625 MB (1 MB main, 18 MB video, 1600 KB sound)

Power Drift specifications

Power Drift featured the following upgrades in late 1988:^[1]

Board composition: CPU Board + Video Board + Network/Link Board (16 MHz)
CPU:

Main CPU: 3× MC68000 @ 12.5 MHz (16-bit & 32-bit instructions @ 6.563 MIPS)
Sound CPU: Z80 @ 4 MHz (8-bit & 16-bit instructions @ 0.58 MIPS)
Link CPU: Z80 @ @ 8 MHz (8-bit & 16-bit instructions @ 1.16 MIPS)

Link MCU: Fujitsu Multi-Protocol Controller (including DMA controller and Interrupt controller)
Memory: Up to 21.4 MB (1232 KB main, 18.584 MB video, 1618 KB sound, 10.25 KB link)

RAM: 834.25 KB, including 788.25 KB high-speed SRAM (Static RAM)^[1]

Main RAM: 208 KB
Video RAM: 598 KB SRAM
Sound RAM: 18 KB SRAM
Link RAM: 10.25 KB SRAM (8 KB SRAM, 2 KB Dual-Port SRAM)

ROM: Up to 20.5625 MB (1 MB main, 18 MB video, 1600 KB sound)

List of games

Galaxy Force (1988)
Galaxy Force II (1988)
Power Drift (1988)
G-LOC: Air Battle (1990)
Strike Fighter (1991)
Rail Chase (1991)

Production credits

Source:

Developer mentions^[10]^[11]

Magazine articles

Main article: Sega Y Board/Magazine articles.

Photo gallery

PCB (top)
PCB (bottom)

References

Sega arcade boards
Originating in arcades
77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 VIC Dual G80 Zaxxon VCO Object System 1 LaserDisc Appoooh Hang-On System 2 System 16 OutRun Gigas X Board Y Board System 24 System 18 System 32 Model 1 Model 2 H1 Board Model 3
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 SG-1000 System E System C Mega-Tech System Mega Play Sega Titan Video NAOMI Hikaru NAOMI 2 Atomiswave System SP Chihiro Triforce
PC-based hardware
05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Lindbergh Europa-R RingEdge RingWide RingEdge 2 Nu Nu 1.1 Nu 2 ALLS

[.5Bhttps:.2F.2Fgithub.com.2Fmamedev.2Fmame.2Fblob.2Fmaster.2Fsrc.2Fmame.2Fdrivers.2Fsegaybd.cpp_Sega_Y-board_hardware_.28MAME.29.5D-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 ^1.6 ^1.7 ^1.8 ^1.9 Sega Y-board hardware (MAME)

[.5Bhttp:.2F.2Fwww.extentofthejam.com.2Fpseudo.2F_Lou.27s_Pseudo_3D_Page.5D-2] Lou's Pseudo 3D Page

[.5Bhttps:.2F.2Fgithub.com.2Fmamedev.2Fmame.2Ftree.2Fmaster.2Fsrc.2Fmame.2Fdrivers.2Fsegaxbd.cpp_Sega_X-board_hardware_.28MAME.29.5D-3] Sega X-board hardware (MAME)

[.5Bhttp:.2F.2Fmamedb.blu-ferret.co.uk.2Fgame.2Fgloc_G-LOC_Air_Battle_.28US.29_.28MAME.29.5D-4] G-LOC Air Battle (US) (MAME)

[Sega_.22X-Board.22_hardware_notes_.282004-12-03.29-5] 5.0 ^5.1 Sega "X-Board" hardware notes (2004-12-03)

[Sega_System_16B_hardware_notes_.282003-01-12.29-6] 6.0 ^6.1 ^6.2 Sega System 16B hardware notes (2003-01-12)

[.5Bhttps:.2F.2Fgithub.com.2Fbji.2Flibmame.2Fblob.2Fmaster.2Fold.2Fsrc.2Fmame.2Fvideo.2Fsegaic16.c_Sega_16.E2.80.91Bit_Common_Hardware.5D.2C_.5B.5BMAME.5D.5D-7] Sega 16‑Bit Common Hardware, MAME

[.5Bhttps:.2F.2Fgithub.com.2Fbji.2Flibmame.2Fblob.2Fmaster.2Fsrc.2Fmame.2Fvideo.2Fsegaybd.c_Sega_Y-Board_Hardware_.28Video.29.5D.2C_.5B.5BMAME.5D.5D-8] Sega Y-Board Hardware (Video), MAME

[Sega_Pre-System_16_hardware_notes_.282004-03-29.29-9] Sega Pre-System 16 hardware notes (2004-03-29)

[https:.2F.2Fweb.archive.org.2Fweb.2F20210205150032.2Fhttps:.2F.2Fwww.4gamer.net.2Fgames.2F999.2FG999905.2F20210126043.2F-10] ttps://www.4gamer.net/games/999/G999905/20210126043/ (Wayback Machine: 2021-02-05 15:00)

[:File:SSM_JP_19950601_1995-06.pdf_p65-11] Sega Saturn Magazine, "June 1995" (JP; 1995-05-08), page 65

[1]

[2]

[3]

[4]

[5]

[6]

[7]

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@@ Line 4: / Line 4: @@
 | imgwidth=320
 | name=
-| maker=[[Sega]]
+| maker=[[Sega Enterprises, Ltd.]]
-| releases={{releases
+| releases={{releasesArcade
-| arcade_date_world=1988
+| system_date_jp=1988-04
+| system_date_uk=1988-07
+| system_date_world=1988
 }}
 }}
-The '''Sega Y Board''' is an arcade system board released by [[Sega]] in 1988 as a successor to the [[Sega X Board]]. Like the X Board before it, the Y Board was known for its 3D [[sprite]]/texture manipulation capabilities. It is the fourth in the Super Scaler series of arcade boards, after the [[Sega Hang-On hardware]], [[Sega OutRun hardware]] and X Board.
+The '''Sega Y Board''' is an arcade system board released by [[Sega]] in 1988 as a successor to the [[Sega X Board]]. Like the X Board before it, the Y Board was known for its 3D [[sprite]]/texture manipulation capabilities. It is the fourth in the [[Super Scaler]] series of arcade boards, after the [[Sega Hang-On hardware]], [[Sega OutRun hardware]] and X Board.
-The Y Board is quite different to the X Board in terms of design, offering a third CPU and more advanced video equipment. Most notably, the Y Board allows for real-time rotation of sprites as well as scaling, and has a higher fillrate for the sprites/textures. Unusually, the system uses no tile layers, so graphics are rendered using only sprites/textures (a design taken by [[SNK]] for their Neo-Geo hardware in 1990).
+The Y Board is quite different to the X Board in terms of design, offering a third CPU and more advanced video hardware. The Y Board allows for real-time rotation of sprites as well as scaling. It also has more memory and a higher fillrate than its predecessor, and can display significantly more sprites/textures on screen. Unusually, the system uses no tile layers (but only a single bitmap plane is used for the background), so graphics are rendered using only sprites/textures (a design taken by [[SNK]] for their Neo-Geo hardware in 1990).
-==Technical Specifications==
+The Y Board debuted with ''[[Galaxy Force]]'' in early 1988. It was succeeded by the [[Sega System 32]] in 1990.
+==Technical specifications==
+===Y Board specifications===
+{{multicol|
 * Board composition: CPU Board + Video Board
-* Main [[wikipedia:Central processing unit|CPU]]: 3× [[wikipedia:Motorola 68000|MC68000]] @ 12.5&nbsp;MHz (16-bit & 32-bit instructions @ 6.563 MIPS)
+* [[wikipedia:Central processing unit|CPU]]:
-** The first 68000 ("main" in MAME) has access to the sound hardware, I/O hardware, and 64KB RAM
+:* Main CPU: 3× [[Motorola 68000|MC68000]] @ 12.5&nbsp;MHz (16-bit & 32-bit instructions @ 6.563 MIPS)
-** The second 68000 ("subx" in MAME) has access to the ysprites hardware, backup RAM and 16KB RAM
+::* The first 68000 ("main" in MAME) has access to the sound hardware, I/O hardware, and 64KB RAM
-** The third 68000 ("suby" in MAME) has access to the bsprites hardware, ysprites full plane rotation, bsprites palette RAM, and 64KB RAM
+::* The second 68000 ("subx" in MAME) has access to the ysprites hardware, backup RAM and 16KB RAM
-** The three CPUs share 64KB of separate RAM for communication as well as the multiplier/divider hardware
+::* The third 68000 ("suby" in MAME) has access to the bsprites hardware, ysprites full plane rotation, bsprites palette RAM, and 64KB RAM
-* Sound CPU: Z80 @ 4&nbsp;MHz (8-bit & 16-bit instructions @ 0.58 MIPS) with 2KB RAM
+::* The three CPUs share 64KB of separate RAM for communication as well as the multiplier/divider hardware
+:* Sound CPU: [[Zilog]] [[Z80]] @ 4&nbsp;MHz (8-bit & 16-bit instructions @ 0.58 MIPS) with 2KB RAM
 * [[wikipedia:Sound chip|Sound chip]]s:
-** [[wikipedia:Frequency modulation synthesis|FM synthesis]] chip: [[Yamaha YM2151]] @ 4&nbsp;MHz (8 FM channels)
+:* [[wikipedia:Frequency modulation synthesis|FM synthesis]] chip: [[Yamaha YM2151]] @ 4&nbsp;MHz (8 FM channels)
-** [[Pulse-code modulation|PCM]] chip: SegaPCM (315-5218) @ 4&nbsp;MHz ([[wikipedia:Stereophonic sound|stereo]] output, 16 PCM channels, [[wikipedia:Audio bit depth|12-bit audio]], 31.25&nbsp;kHz [[wikipedia:Sampling rate|sampling rate]])
+:* [[Pulse-code modulation|PCM]] sampling chip: [[SegaPCM]] (315-5218) @ 4&nbsp;MHz ([[wikipedia:Stereophonic sound|stereo]] output, 16 PCM channels, [[wikipedia:Audio bit depth|12-bit audio]], 31.25&nbsp;kHz [[wikipedia:Sampling rate|sampling rate]])
-* [[wikia:w:c:gaming:Graphics processing unit|GPU]]: Sega Super Scaler chipset
+* [[wikia:w:c:gaming:Graphics processing unit|GPU]]: Sega [[Super Scaler]] chipset{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaybd.cpp Sega Y-board hardware (MAME)]}}
-** Graphics board: Sega 837-6566 Video Board @ 50&nbsp;MHz (315-5196 sprite generator, 315-5213 sprite chip, 315-5242 color encoder, 315-5305 sprite generator, 2× 315-5306 video sync & rotation, 315-5312 video mixer)
+:* Graphics board: Sega 837-6566 Video Board @ 50&nbsp;MHz (315-5196 sprite generator, 315-5213 sprite chip, 315-5242 color encoder, 315-5305 sprite generator, 2× 315-5306 video sync & rotation, 315-5312 video mixer)
-** Math chips: 315-5248 hardware multiplier, 315-5249 hardware divider
+:* Math processors: 315-5248 hardware multiplier, 315-5249 hardware divider
-* [[wikia:w:c:gaming:Random access memory|RAM]]: 778 [[wikipedia:Kibibyte|KB]] ([[wikipedia:Static random-access memory|SRAM]])
+* Fixed-point arithmetic capabilities: [[wikipedia:Z-buffering|Z-buffering]], [[wikipedia:Depth map|depth map]]{{ref|[http://www.extentofthejam.com/pseudo/ Lou's Pseudo 3D Page]}}
-** Main RAM: 208 KB (64 KB CPU 1, 16 KB CPU 2, 64 KB CPU 3, 64 KB shared)
+* Memory: Up to 21.3672 [[Byte|MB]] (1232 [[Byte|KB]] main, 18.584 MB video, 1618 KB sound)
-** [[wikipedia:Video memory|Video RAM]]: 566 KB (32 KB Y-sprites, 4 KB B-sprites, 2 KB rotation, 16 KB palette, 512 KB [[wikipedia:Framebuffer|framebuffer]])
+:* [[RAM]]: 824 KB, including 778 KB high-speed [[SRAM]] (Static RAM){{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaybd.cpp Sega Y-board hardware (MAME)]}}{{ref|[https://github.com/mamedev/mame/tree/master/src/mame/drivers/segaxbd.cpp Sega X-board hardware (MAME)]}}
-** Sound RAM: 6 KB (2 KB Z80, 4 KB SegaPCM)
+::* Main RAM: 208 KB (64 KB CPU 1, 16 KB CPU 2, 64 KB CPU 3, 64 KB shared)
-* [[wikipedia:Display resolution|Video resolution]]: 320×224 (display), 342×262 (overscan), progressive scan
+::* [[VRAM|Video RAM]]: 598 KB SRAM (64 KB Y-sprites, 4 KB B-sprites, 512 KB dual sprite [[wikipedia:Framebuffer|framebuffers]], 2 KB rotation, 16 KB color)
-* Refresh rate: 59.6368 to 60 Hz ([[wikipedia:V-sync|V-sync]])
+::* Sound RAM: 18 KB SRAM (2 KB Z80, 16 KB SegaPCM)
-* Frame rate: 59.6368 to 60 frames per second
+:* [[ROM]]: Up to 20.5625 MB (1 MB main, 18 MB video, 1600 KB sound){{ref|[http://mamedb.blu-ferret.co.uk/game/gloc G-LOC Air Battle (US) (MAME)]}}
-* Color palette: 2,097,152 (4096 palette banks with 512 colors each), to 16,777,216 with effects (shadow & highlight, luminosity, palette fade)
+* [[wikipedia:Display resolution|Video resolution]]: 320×224 (display), 342×262 (overscan),{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaybd.cpp Sega Y-board hardware (MAME)]}} progressive scan
-* Colors on screen: 24,576, to 71,680 (320×224) with luminosity and palette fade
+:* [[wikipedia:Scan line|Scanlines]]: 224 (display), 262 (overscan)
+* Refresh rate: 59.6368–60 Hz ([[wikipedia:V-sync|V-sync]]){{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaybd.cpp Sega Y-board hardware (MAME)]}}
+:* Maximum frame rate: 59.6368–60 FPS
+* [[Palette|Color palette]]: 2,097,152 (4096 palette banks with 512 colors each), to 16,777,216 with effects (shadow & highlight, luminosity, palette fade)
+:* Colors on screen: 24,576 (unique colors), to 71,680 (320×224) with luminosity and palette fade{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaybd.cpp Sega Y-board hardware (MAME)]}}
 * Video hardware:
-** Two sprite planes with fixed [[wikipedia:Z-order|Z-order]]
+:* Two sprite planes with fixed [[wikipedia:Z-order|Z-order]]
-** Lower sprite plane ("ysprites" in MAME): full scaling and rotation; also the entire plane can be rotated as a whole
+:* Lower sprite plane ("ysprites" in MAME): full scaling and rotation; also the entire plane can be rotated as a whole
-*** Palettes are stored alongside the sprite table; sprite table entries hold a pointer to the palette, which itself is stored as an table of palette indirection values (?)
+::* Palettes are stored alongside the sprite table; sprite table entries hold a pointer to the palette, which itself is stored as an table of palette indirection values (?)
-** Higher sprite plane ("bsprites" in MAME): standard [[Sega System 16B]] sprite plane
+:* Higher sprite plane ("bsprites" in MAME): standard [[Sega System 16B]] sprite plane
 * Graphical planes: Three layers
-** B-sprite (front plane) layer: Priority on top, based on [[Sega System 16|System 16B]] (line buffer) sprite system
+:* B-sprite (front plane) layer: Priority on top, based on [[Sega System 16|System 16B]] (line buffer) sprite system
-** Y-sprite (back plane) layer: Plugs into a full-screen rotation, large [[wikipedia:Fillrate|fillrate]], dual [[wikipedia:Framebuffer|framebuffer]] (based on X Board) that can be fully rotated
+:* Y-sprite (back plane) layer: Plugs into a full-screen rotation, large [[wikipedia:Fillrate|fillrate]], double-buffered [[wikipedia:Framebuffer|framebuffers]] (based on X Board) that can be fully rotated{{intref|Sega "X-Board" hardware notes (2004-12-03)}}
-** Sky gradient (background) layer: [[wikipedia:Bitmap|Bitmap]] plane
+:* Sky gradient (background) layer: [[wikipedia:Bitmap|Bitmap]] plane
-* [[Sprite (computer graphics)|Sprite]] capabilities: [[wikipedia:Linked list|Linked list]] of sprites, shadow & highlight, palette fade, color rotations, different levels of luminosity, full sprite zooming & scaling on both sprite planes, full sprite & framebuffer rotation on Y-sprite plane, [[wikipedia:Double buffering|double buffering]], dual line buffers on B-plane (512 sprite pixels/texels per line), dual [[wikipedia:Framebuffer|framebuffer]] on Y-plane
+* [[Sprite|Sprite/texture]] capabilities: [[wikipedia:Linked list|Linked list]] of sprites, shadow & highlight, palette fade, color rotations, different levels of luminosity, full sprite zooming & scaling on both sprite planes, full sprite framebuffer rotation on Y-sprite plane, [[wikipedia:Double buffering|double buffering]], double-buffered line buffer on B-plane (512 pixels), double-buffered [[wikipedia:Framebuffer|framebuffer]] on Y-plane{{intref|Sega System 16B hardware notes (2003-01-12)}}{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaybd.cpp Sega Y-board hardware (MAME)]}}{{ref|[https://github.com/bji/libmame/blob/master/old/src/mame/video/segaic16.c Sega 16‑Bit Common Hardware], [[MAME]]}}
-** Sprite size/resolution: 8×8 to 512×512 [[wikipedia:Pixel|pixel]]
+:* Sprite size/resolution: 8×8 to 512×512 [[wikipedia:Pixel|pixels]]{{ref|[https://github.com/bji/libmame/blob/master/src/mame/video/segaybd.c Sega Y-Board Hardware (Video)], [[MAME]]}}
-** Colors per sprite: 16 to 512
+:* Colors per sprite/texture: 16 to 512
-** Sprites per frame: 68 [[wikipedia:Kibibyte|KB]] [[wikipedia:Video memory|sprite RAM]], up to 2176 sprites (with 8x8 size and [[wikia:w:c:gaming:List of color palettes|16 colors]] each)
+* Sprites/textures per frame: 2176
-** [[wikipedia:Texel (graphics)|Sprite pixels/texels]]: 50&nbsp;MHz video clock cycles, 833,333 (60&nbsp;Hz) to 838,408 (59.6368&nbsp;Hz) pixels/texels per frame (262 [[wikipedia:Scan line|scanlines]]), 3180 to 3200 sprite pixels/texels per scanline, 397 to 400 sprites per scanline
+:* Y sprites: 2048 sprites/textures, 64 KB attribute RAM (32 KB bank per framebuffer), 16 bytes per entry{{intref|Sega "X-Board" hardware notes (2004-12-03)}}
+:* B sprites: 256 sprites/textures, 4 KB attribute RAM, 16 bytes per entry{{intref|Sega System 16B hardware notes (2003-01-12)}}
+:* Sprites/textures per second: 2176 (1&nbsp;FPS) to 130,560 (60&nbsp;FPS)
+* Y-plane framebuffer [[fillrate]]: 50 [[Pixel|MPixels/s]]
+:* Y-plane clock rate: 50 MHz
+:* Maximum texels per scanline: 3200
+:* Maximum sprites/textures per scanline: 400
+* B-plane line buffer fillrate: 12.5874 MPixels/s{{intref|Sega System 16B hardware notes (2003-01-12)}}{{intref|Sega Pre-System 16 hardware notes (2004-03-29)}}
+:* B-plane clock rate: 12.5874 MHz
+:* Maximum texels per scanline: 800
+:* Maximum sprites/textures per scanline: 100
+* Overall fillrate: 62.5874 MPixels/s
+:* Maximum texels per scanline: 4000
+:* Maximum sprites/textures per scanline: 500
+}}
+===''Galaxy Force II'' specifications===
+''[[Galaxy Force II]]'' featured the following upgrades in mid-1988:{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaybd.cpp Sega Y-board hardware (MAME)]}}
-==List of Games==
+{{multicol|
-* ''[[Galaxy Force]]'' (1988)
+* CPU:
-* ''[[Galaxy Force II]]'' (1988)
+:* Main CPU: 3× [[Motorola 68000|MC68000]] @ 12.5&nbsp;MHz (16-bit & 32-bit instructions @ 6.563 MIPS)
-* ''[[Power Drift]]'' (1988)
+:* Sound CPU: [[Zilog Z80|Z80]] @ 4&nbsp;MHz (8-bit & 16-bit instructions @ 0.58 MIPS)
-* ''[[G-LOC Air Battle]]'' (1990)
+:* Motor CPU: Z80 @ 8&nbsp;MHz (8-bit & 16-bit instructions @ 1.16 MIPS)
-* ''[[Rail Chase]]'' (1991)
+* Memory: Up to 21.4 [[Byte|MB]] (1232 [[Byte|KB]] main, 18.584 MB video, 1618 KB sound, 32 KB motor)
-* ''[[Strike Fighter]]'' (1991)
+:* [[RAM]]: 856 KB, including 778 KB high-speed [[SRAM]] (Static RAM){{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaybd.cpp Sega Y-board hardware (MAME)]}}
+::* Main RAM: 208 KB
+::* [[VRAM|Video RAM]]: 598 KB SRAM
+::* Sound RAM: 18 KB SRAM
+::* Motor RAM: 32 KB
+:* [[ROM]]: Up to 20.5625 MB (1 MB main, 18 MB video, 1600 KB sound)
+}}
-==Gallery==
+===''Power Drift'' specifications===
+''[[Power Drift]]'' featured the following upgrades in late 1988:{{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaybd.cpp Sega Y-board hardware (MAME)]}}
+{{multicol|
+*Board composition: CPU Board + Video Board + Network/Link Board (16 MHz)
+* CPU:
+:* Main CPU: 3× [[Motorola 68000|MC68000]] @ 12.5&nbsp;MHz (16-bit & 32-bit instructions @ 6.563 MIPS)
+:* Sound CPU: [[Zilog Z80|Z80]] @ 4&nbsp;MHz (8-bit & 16-bit instructions @ 0.58 MIPS)
+:* Link CPU: Z80 @ @ 8&nbsp;MHz (8-bit & 16-bit instructions @ 1.16 MIPS)
+*Link [[wikipedia:Microcontroller|MCU]]: Fujitsu Multi-Protocol Controller (including DMA controller and Interrupt controller)
+* Memory: Up to 21.4 [[Byte|MB]] (1232 [[Byte|KB]] main, 18.584 MB video, 1618 KB sound, 10.25 KB link)
+:* [[RAM]]: 834.25 KB, including 788.25 KB high-speed [[SRAM]] (Static RAM){{ref|[https://github.com/mamedev/mame/blob/master/src/mame/drivers/segaybd.cpp Sega Y-board hardware (MAME)]}}
+::* Main RAM: 208 KB
+::* [[VRAM|Video RAM]]: 598 KB SRAM
+::* Sound RAM: 18 KB SRAM
+::* Link RAM: 10.25 KB SRAM (8 KB SRAM, 2 KB [[wikipedia:Dual-ported RAM|Dual-Port]] SRAM)
+:* [[ROM]]: Up to 20.5625 MB (1 MB main, 18 MB video, 1600 KB sound)
+}}
+==List of games==
+{{CargoReleaseList
+| table=releases
+| query=console="ybd"
+| orderby=date
+}}
+==Production credits==
+{{creditstable|
+*[[Hiroshi Yagi]]
+*[[Kazuhiko Hamada]]
+| source=Developer mentions{{ref|https://web.archive.org/web/20210205150032/https://www.4gamer.net/games/999/G999905/20210126043/}}{{magref|ssmjp|1995-06|65}}
+| console=Arcade
+}}
+==Magazine articles==
+{{mainArticle|{{PAGENAME}}/Magazine articles}}
+==Photo gallery==
 <gallery>
-File:YBoard topPCB.jpg|PCB (top)
+YBoard topPCB.jpg|PCB (top)
-File:YBoard bottomPCB.jpg|PCB (bottom)
+YBoard bottomPCB.jpg|PCB (bottom)
 </gallery>
+==References==
+<references/>
 {{Sega Arcade Boards}}
 [[Category:Sega System series]]