Changes
/* Hardwares */
*1942 (Capcom) : uses a Z80 as main CPU and a second Z80 to manage additionnal 2x AY8910 Sound processors.
*Black Tiger (Black Dragon) (Capcom) uses a Z80 as main CPU and a second Z80 as sound-CPU to manage the YM2203 soundchip.
*Sega MegaDrive/Genesis is basically a downgraded arcade system, with a 68000 as main CPU and a Z80 as sound co-CPU. While the Z80 could mostly only used for sounds as a MegaDrive, it was also used to emulate Retro-Compatibility with SegaMaster System console (Z80 based system), provided the right cartridge adaptator.
Being '''ROM''' based, Arcade games could be far heavier than what a home computer's RAM could handle. While a good 8bit sytem with 128K RAM and fast Disk Drive multiloading (=CPC6128) would be good enough to get accurate ports, the popularity of 64K RAM + Tape configuration (=CPC464 or ZX Spectrum) made accurate ports far more difficult.
==Gameplay==
