ColecoVision

ColecoVision

The ColecoVision is Coleco Industries' second-age home computer game support that was discharged in August 1982. The ColecoVision offered a nearer experience to all the more capable arcade diversion frameworks contrasted with contenders, for example, the Atari 2600, alongside the way to extend the framework's essential equipment. 

The underlying list of twelve diversions incorporated Nintendo's Donkey Kong as the pack-in cartridge, Sega's graphically noteworthy Zaxxon, and some lesser known arcade titles that found a bigger gathering of people on the support, for example, Lady Bug, Cosmic Avenger, and Venture. Around 145 titles altogether were distributed as ROM cartridges for the framework in the vicinity of 1982 and 1984. 

Coleco pulled back from the computer game market in 1985, along these lines ColecoVision was stopped that year.

Hardware:

         

The principle reassure unit comprises of a 14×8×2-inch rectangular plastic case that houses the motherboard, with a cartridge space on the correct side and connectors for the outer power supply and RF jack at the back. The controllers interface into connects to a recessed region on the highest point of the unit. 

The plan of the controllers is like that of Mattel's Intellivision—the controller is rectangular and comprises of a numeric keypad and an arrangement of side catches. Set up of the roundabout control circle underneath the keypad, the Coleco controller has a short, 1.5-inch joystick. The keypad is intended to acknowledge a thin plastic overlay that maps the keys for a specific amusement. Every ColecoVision comfort delivered with two controllers. 

All first-party cartridges and most outsider programming titles highlight a 12-second delay before exhibiting the amusement select screen. This postpone comes about because of a purposeful circle in the support's BIOS to empower on-screen show of the ColecoVision mark. Organizations like Parker Brothers, Activision, and Micro Fun circumvent this circle, which required installing segments of the BIOS outside the postpone circle, additionally lessening stockpiling accessible to genuine amusement programmining

Technical specifications:

*CPU: NEC variant of Zilog Z80A @ 3.58 MHz (See chip U1, checked NEC D780C-1 in circuit board picture) 

*Video processor: Texas Instruments TMS9928A (40-stick DIP situated under the warmth sink) 

256×192 pixel determination 

32 sprites on-screen immediately 

16 hues 

*Sound: Texas Instruments SN76489A PSG (chip U20 on circuit board) 

3 tone generators 

1 commotion generator 

*Video RAM: 16 KB (as eight 16K x 1-bit chips, stamped ITT 8344 4116 3N on circuit board) 

*Smash: 1 KB (as two 1K x 4-bit chips, checked UPD2114LC (U3 and U4) on circuit board) 

*ROM: 8 KB Texas Instruments TMS4764 Mask ROM (chip U2, stamped TMS4764NL on circuit board) 

*Capacity: ROM Cartridge of 8, 16, 24 or 32 KB limit.