[MAME]

 * Namco's System22 and Super System 22 hardware.
 *
 * Known Custom Chips
 *
 * CPU PCB:
 *
 *  C71 TI TMS320C25 DSP
 *  C71 WEYW40116 (TMS320C25 Main/Sub DSP)
 *  C71 D72260FN 980 FE-5CA891W
 *
 *  M5M5178AP-25 (CPU 16R, 17R, 19R, 20R) DSP Work RAM (8K x 8bit x 2 x 2)
 *
 *  C74 Mitsubishi M37702 MCU
 *  C74 159 408600 (OLD SUB)
 *  C74 159 543100 (NEW SUB)
 *  C74 159 414600 (OLD I/O)
 *  C74 159 437600 (NEW I/O)
 *
 * C195 (Shared SRAM Controller)
 * C196 CPP x 6
 * C199 (CPU 18K) x 1
 * C317 IDC (CPU 15E) x 1 (S21B)
 * C337 PFP x 1
 * C342 x 1 (S21B)
 * C352 (32ch PCM)
 * C353 x 1
 *
 *
 * VIDEO PCB:
 *
 * C304 - 4 chips on SS22 Video PCB
 * C305 (Palette)
 * C335
 *  9C, 10C
 *  12D, 12E
 *  14C
 * C300
 *  18B, 18C, 20B, 20C, 22B, 22C
 * Cxxx
 *  34R, 35R
 *
 * TI TBP28L22N (256 x 8bit PROM)
 *  VIDEO 2D, 3D, 4D (RGB Gamma LUT ROM)
 *
 *  RR1.GAM (for Ridge Racer 1/2, Rave Racer)

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