|Hardware : System-on-a-chip 90nm solution with integrated CPU, Graphics and Sound Hardware.
CPU : Hitachi SH-4 32-bit RISC CPU @ 300MHz
GPU : Imagination Technologies Power VR MBX+VGP @ 150MHz
SPU : ADPCM Sound
Triangle Rendering : 10M Polygons/sec
Fill Rate : 150M Pixel/sec
Max Resolution : 1280x1024
Other Features : Ethernet, USB and d-sub15 RGB tv out
Other Chips : 315-6258A(SEGA), 315-6232A(SEGA), ML60842(OKI), XC2S200E(XILINX SPSRTAN), RMI AU1500-333MBD(Raza microelectronics Inc), L80227/B1(LIS LOGIC), XC9572XL(Xilinx, SEGA 315-6416)
BIOS : S29AL016D90TF101(SEGA FPR-24407)(RMI AU1500-333MBD Program?)
BOOT ROM : M27C160(SEGA EPR-24328A)
AMP IC : TPA310002(Texas Instruments)
Game Media : Compact Flash 256M (Hagiwara sys-com MODEL CFI-256MDG(H02AA)) or ROM/FLASH PCB
Security IC : Naomi Dongle
On Board Program Storage : 512M Flash Memory x8(max)
GT Library : Specially designed 3D graphics library provides simple and easy development environment for 3D graphics application not requiring deep hardware knowledge.
A/V Streaming Middleware : Movie/Stream Audio middleware provides High Quality and High Performance Video and Audio rendering.
Operating System : Embedded LINUX 2.6 OS providing highly efficient Real-time multi-task operation.
Serveral modificiations were made including SH4 Specific Minor tuning on 2.6 to improve the interrupt response and a synchronization API was added.
Development Notes : Developed in conjunction with SEGA Sammy Holdings R&D team and SI-Electronics.
Naming Notes : This board has been referred to as both "Sega Aurora" and "Sega Spider", the latter due to the fact that controls are directly wired to the board, it's not jamma nor jvs and you don't need any I/O converter as you did in Naomi cabinets
System Pictures : System Block Diagram - Software Configuration Diagram
This hardware is based on Sega Dreamcast