I have the main unit (CIB).
type computer
country Japan
year 1993
os Sega
cpu Motorola 68000 / Zilog Z80
speed 7.61 MHz / 3.58 MHz
graphic Progressive 320×224 NTSC
colors 512 palette 64 on screen
sound Yamaha YM2612, Texas Instruments SN76489A
ports cartridge port, two controllers, power, A/V
The Sega Genesis 2 — The Redesigned Genesis
The Sega Genesis 2 (Mega Drive 2 outside North America), released in 1993, was a redesigned, smaller version of the original Genesis at a lower price point — featuring a more compact form factor and a new six-button controller as standard. The Genesis 2 arrived as the Super Nintendo was gaining momentum and Sega needed to maintain price competitiveness. The redesign removed the headphone jack and volume control of the original but introduced the standard six-button layout that fighting games like Street Fighter II and Mortal Kombat required. The Genesis 2 became the most common Sega hardware configuration of the mid-1990s.