Hardware Overview (Sega NAOMI 2)

the sega naomi 2 is an arcade board developed by sega and is a successor to sega naomi hardware it was originally released in 2000 since it uses similar naomi architecture (but significantly beefed up), it is also fully backwards compatible with its predecessor the naomi 2 is significantly more powerful than the naomi, including a dual cpu setup, new t\&l gpu, dual rasterizer gpu, increased memory, and faster bandwidth this leads to games with much more polygons than a naomi game, rendered at much faster speeds, while the new t\&l gpu adds advanced lighting and particle effects it was also more affordable than the very expensive (and difficult to program) sega hikaru arcade system that preceded it the naomi 2 was nevertheless more powerful than home systems at the time as with the naomi, the naomi 2 was also available in gd rom and satellite terminal variants it was sega's last proprietary arcade system board; subsequent sega arcade boards have been based on console and pc hardware components deisgnators component ic110, ic15 nec powervr2 gpu (315 6267) ic105 sega 315 6289 ic1 hitachi sh 4 cpu ic27 bios 27c160 eprom ic30 fpga altera flex epf8452aqc160 3 (qfp160) ic31 fpga configuration memory altera epc1064pc8 (315 6188) ic16 to ic23, ic111 to ic118 hynix hy57v161610dtc 8 2 bank 512k x 16 bit (16mbit) sdram (tsop ii 50) ic106, ic107, ic108s, ic109s hynix hy57v653220b 4 bank 512k x 32bit sdram (tsop ii 86) ic9, ic10, ic11s, ic12s hitachi 5264165ftta60 1m x 16 bit x 4 banks (64mbit) sdram (tsop ii 54) ic?? (near ic1) altera epm7032aelc44 10 cpld sega 315 6268 (plcc44) ic45 sega 315 6146 (qfp176) ic52 analog devices adm485 +5 v low power eia rs 485 transceiver (soic8) ic37 sharp pc910 ultra high speed response opic photocoupler (dip8) ic33 yamaha aica (sega 315 6232) super intelligent sound processor ic7 altera max epm7064aetc100 10 cpld sega 315 6269 (tqfp100) ic5, ic41 video encoder sega 315 6258 (qfp56) shared components with dreamcast the naomi and naomi 2 share the following components that can be directly used from a dreamcast if needed for repairs powervr2 gpu @ 100mhz (315 6226) dreamcast = ic201 naomi 2 = ic15 + ic110 hitachi sh 4 cpu @ 200mhz yamaha aica (315 6232) super intelligent sound processor dreamcast = ic301 naomi 2 = ic33 video encoder (315 6258) dreamcast = ic401 naomi 2 = ic5 + ic 41 apprently the powervr2 from the dreamcast is 720 mflop processing speed, while naomi is 1 gflop (30% faster) however i have successfully used a dreamcast ic on a naomi 2 without issues test button on the front panel there are two switches labelled psw1 (test) and psw2 (select) psw1 is the test button switch press this during boot to enter the diagnostics menu where you can test ram, rom and other things