Configuration:Sega Model 2

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Configuration:Sega Model 2
Sega-model2-logo.png
Sega-pcbmodel2.jpg
Manufacturer Sega
Type Arcade
CPU Intel i960-KB @ 25 MHz 32bits RISC
GPU Fujitsu TGP MB86234 FPU 32bits 16M flops
Sound CPU 16bits 68000 @ 10Mhz
Sound Chip 2 x Custom 28 channel PCM chips, 1 for Music and 1 for Effects (Can access up to 8meg sample rom *per chip*)
Memory 9776 KB
Controllers Custom
Year 1993

Platform Information

from wikipedia

The Sega Model 2 is an arcade system board released by Sega in 1993. Like the Model 1, it was developed in cooperation with Martin Marietta, and was a further advancement of the earlier Model 1 system. The most noticeable improvement was texture mapping, which enabled polygons to be painted with bitmap images, as opposed to the limited monotone flat shading that Model 1 supported. The Model 2 also introduced the use of texture filtering and texture anti-aliasing.

Designed by Sega AM2's Yu Suzuki, he stated that the Model 2's texture mapping chip originated "from military equipment from Lockheed Martin, which was formerly General Electric Aerial & Space's textural mapping technology. It cost $2 million to use the chip. It was part of flight-simulation equipment that cost $32 million. I asked how much it would cost to buy just the chip and they came back with $2 million. And I had to take that chip and convert it for video game use, and make the technology available for the consumer at 5,000 yen ($50)" ($84 in 2016) per machine. He said "it was tough but we were able to make it for 5,000 yen. Nobody at Sega believed me when I said I wanted to purchase this technology for our games." There were also issues working on the new CPU, the Intel i960-KB, which had just released in 1993. Suzuki stated that when working "on a brand new CPU, the debugger doesn't exist yet. The latest hardware doesn't work because it's full of bugs. And even if a debugger exists, the debugger itself is full of bugs. So, I had to debug the debugger. And of course with new hardware there's no library or system, so I had to create all of that, as well. It was a brutal cycle."

Despite its high pricetag, the Model 2 platform was very successful. It featured some of the highest grossing arcade games of all time: Daytona USA, Virtua Fighter 2, Cyber Troopers Virtual-On, The House of the Dead, and Dead or Alive, to name a few.

Model 2 has four different varieties: Model 2 (1993), Model 2A-CRX (1994), Model 2B-CRX (1994) and Model 2C-CRX (1996). While Model 2 and 2A-CRX use a custom DSP with internal code for the geometrizer, 2B-CRX and 2C-CRX use well documented DSPs and upload the geometrizer code at startup to the DSP. This, combined with the fact that some games were available for both 2A-CRX and 2B-CRX, led to the reverse engineering of the Model 2 and Model 2A-CRX DSPs.

Media Devices

  • ROM Images

Available Emulators

Below is a list of available emulators for this platform.