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The IBM PC AT used an Intel 8042 chip to interface to the keyboard. This chip had two additional functions: it controlled access to the Intel 80286 CPU's A20 line in order to implement a workaround for a chip bug, and it was used to initiate a software CPU reset in order to allow the CPU to transition from protected mode to real mode because ...
The Atari CX50 keyboard controller functions as a computer keyboard and is required for games such as Star Raiders. [ 3 ] : 59–60 The Atari Mindlink is a prototyped motion controller which measures the movement of the user's eyebrows via a fitted headband, which replaces the paddle controller; however, the Mindlink was cancelled early in its ...
7400 series TTL chips. A swappable EPROM chip and a socket (for firmware updates). A 32 KB CMOS SRAM (upgradable to a 64 KB chip) Game controller and VGA ports. USB port and cable for power. A game controller similar to the NES one. A keyboard controller with built-in non-volatile memory. Resistors, capacitors and diodes. A set of 4 ...
A floppy-disk controller [2] An IEEE 1284-compatible parallel port [2] (commonly used for printers) One or more 16C550-compatible serial port UARTs [2] Keyboard controller for PS/2 keyboard and/or mouse; Most Super I/O chips include some additional low-speed devices, such as: Temperature, voltage, and fan speed interface [3] [4]
Many BIOS updates also include upgrades for the embedded controller firmware. An embedded controller is sometimes known as a "Keyboard Controller BIOS", which comes from the fact that the embedded controller evolved from the keyboard controller and often still is used as a keyboard controller.
The 8021 was also used in the keyboards for the TRS-80 Model 12, 12B, 16, 16B and the Tandy 6000/6000HD. [6] The original IBM PC keyboard used an 8048 as its internal microcontroller. [7] The PC AT replaced the PC's Intel 8255 peripheral interface chip at I/O port addresses 0x60–63 with an 8042 accessible through port addresses 0x60 and 0x64. [8]
The Intel 8279 is a keyboard and display controller developed for interfacing to Intel 8085, 8086 and 8088 microprocessors. The industrial version of ID8279 was available for USD $30.70 in quantities of 100. [1] Its important features are: [2] Simultaneous keyboard and display operations. Scanned keyboard mode. Scanned sensor mode.
The LPC bridge provides a data and control path to the super I/O (the normal attachment for the PS/2 keyboard and mouse, parallel port, serial port, IR port, and floppy controller). SMBus controller. DMA controller. The 8237 DMA controller allows ISA or LPC devices direct access to main memory without needing help from the CPU. PIC and I/O APIC.