Description:

Overview:

The 82C451 Integrated VGA Graphics Controller is a single-chip solution that provides full compatibility with IBM VGA at hardware, register, and BIOS levels. The chip is designed to offer enhanced backward compatibility with EGA, CGA, Hercules, and MDA without using NMIs, making it suitable for a variety of applications.

Key Features:

• Fully compatible with IBM VGA
• Enhanced backward compatibility with EGA, CGA, Hercules, and MDA
• Dual Bus Architecture, integrated interface to EISA/ISA (PC/AT) and MCA bus (CHIPS/250 and CHIPS/280)
• Single-chip solution
• Highly integrated design, resulting in lower chip count (15 chips required for a VGA implementation, including memory)
• Small, low-cost 144-pin flat pack package
• Supports 8 and 16-bit CPU interface
• Supports digital and analog monitors
• Maximum resolution of 800x600 with 16 colors and 132-column text mode
• External palette DAC support for up to 16 million colors
• Pinout compatible with 82C452 Super VGA, allowing the same board design to use both parts
• Full complement of application software drivers available from Chips and Technologies

The 82C451 Integrated VGA Graphics Controller includes various components such as a bus control, DRAM, BIOS ROM(s), DAC control, and video outputs for both digital and analog monitors. The chip supports multiple clock frequencies for different applications and resolutions.