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Emulation student
168 Posts
Discussion Starter · #1 ·
can anyone point me in the right direction on this?
i am curious 2 know hardware specs on the saturn and genesis
proc and memory type would be a bonus
alsanyone get slave zero running on a saturn emu yet?:)

11,307 Posts


Two Hitachi SH2 32-bit RISC @ 28.6MHz, 50 MIPS
One Hitachi SH1 32-bit RISC
VDP 1 32-bit video display processor
VDP 2 32-bit video display processor
Saturn Control Unit (SCU)

Motorola 68EC000 sound processor
Yamaha FH1 DSP sound processor

2 Megabytes (16 megabits) RAM
1.54 Megabytes (12 megabits) VRAM (Video RAM)
540 Kilobytes (4 megabits) Audio RAM
540 Kilobytes (4 megabits) CD-ROM Cache

VDP 1 32-bit video display processor
-- sprite, polygon, and geometry engine
-- dual 256KB frame buffers for rotation and scaling effects
-- Texture Mapping
-- Goraud Shading
-- 512KB cache for textures

VDP 2 32-bit background and scroll plane video display processor
-- background engine
-- 5 simultaneous scrolling backgrounds
-- 2 simultaneous rotating playfields

200,000 Texture Mapped Polygons/Second
up to 60 frames per second animation
24-bit true color graphics
16.8 Million Available Colors
320x224 and 720x576 Resolution

Yamaha FH1 24-bit Digital Signal Processor @ 22.6MHz
Motorola 68EC000 sound processor @ 11.3MHz
32 PCM (Pulse Code Modulation) Channels
8 FM (Frequency Modulation) Channels
44.1 kHz Sampling Rate

320 Kilobytes/Second Transfer Speed
Audio CD Compatible
CD+G Compatible
CD+EG Compatible
CD Single (8 cm CD) Compatible
Optional - Video CD, Photo CD, EBook, Digital Karaoke
Optional - 512KB Memory Cartridges for game save

High speed serial communications port
Internal 32-bit Expansion port
Internal Multi AV Port for Video CD (MPEG) adapter
Composite Video/Stereo (Standard)
NTSC RF (Optional)
S-Video Compatible (Optional)
RGB Compatible (Optional)
HDTV Compatible
Analog Control Pad (x2)

A Bus
This data bus connects the CD-ROM and cartridge expansion to the central bus controller unit (SCU).

B Bus
This 16-bit bus runs at 28 MHz and connects the video and sound subsystems to the central bus controller unit (SCU).

The first Video Digital Processor (VDP) acts as the sprite processor. Because of the way the Sega Saturn handles 3D, not only does this chip calculate all of the sprites, but it also maps sprites into geometry. It relies on dual 256K frame buffers that handle rotation, and pulls data from a 512K texture RAM cache.

The second VDP works as the background processor. This chip can generate up to five simultaneously active backgrounds, and can also rotate two playfields at once. It is also possible to have three normal scrolls at the same time as a field of rotation.

This is the Sega Saturn's incredible sound processor. Easily the most potent piece of hardware inside the machine, it boasts 32 voices, FM synthesis, PCM synthesis, and 2 CPU interfaces. It features a full compliment of hardware, including a 16-bit 68EC000 at 11.3 MHz and a Yamaha FH1 processor for an overall frequency of 22.58 MHz. Other features include Direct Memory Access (DMA) for file transfer, a 16 channel digital mixer, and a 128 step digital signal processor.

Boot ROM
A massive 512K is taken up with the system's ROM. The Sega Saturn allows six different languages to be selected, viewing of CD+G discs, and a music CD option that allows the vocals to be removed from CD tracks.

The Sega Saturn contains two Hitachi SH2 RISC CPUs running at 28.6 MHz and 25 MIPS each. The SH2 is only two cm. square but it includes many important components that provide the chip with its power. By connecting both CPUs to the RAM, the SH2 can exchange data with memory directly, which reduces wait times. The SH2 also contains a 4K data cache that speeds up processing, and it has the ability to do involved mathematical functions such as multiplication and division in the CPU core.

Saturn A/V Port Pinouts

1 2 3 4 5

o o o o o

o o o o o

6 7 8 9 10



A/V Out Connector


Genesis (much smaller list):

CPU(s): 68000 @ 8Mhz
Video Processor(s): Dedicated VDP, 320x224 resolution, 3 planes, 80 sprites, 64 on-screen colors

Audio Processor(s): Z80 @ 4 Mhz, 8K of dedicated sound RAM

RAM: 64K main, 64K VRAM, ~70K CRAM
Storage: Cartridge
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