Computer I/O Devices and Modules

Devices that provide a means for exchanging data between the external environment and the computer.

External devices suitable for communicating with computer users, like video displays and printers.

External devices that exchange data with equipment, such as magnetic disks and sensors.

External devices for communication with remote devices.

An external device connected to an I/O module.

A component that facilitates data exchange between external devices and the computer.

The transfer of data between the computer and an external device.

The information exchanged between the I/O module and the external device.

A standard code that represents characters used in computers. Each character has a unique 7-bit binary code, allowing for 128 different characters.

A type of character that can be printed on paper or displayed on a screen. Includes letters, numbers, and special symbols.

A character that instructs the computer on how to handle other characters. Used to manage printing or display functions.

When you press a key on the keyboard, it generates a signal that is translated into a bit pattern representing the corresponding IRA code.

A device, typically found in keyboards, that converts the signal from a key press into a digital code that the computer can understand.

When you press a key, the transducer generates a signal. This signal is converted into a bit pattern representing the corresponding IRA code. The code is then transmitted to the I/O module, and ultimately to the computer.

The I/O module sends the IRA code to the output device (like a monitor). The transducer in the output device interprets the code and displays the corresponding character on the screen.

A method where the CPU repeatedly checks the status of an I/O module until it's ready to transfer data. This involves the CPU waiting for the device to become ready.

A method where the I/O module interrupts the CPU when it's ready to transfer data. This allows the CPU to perform other tasks while waiting for the device.

A signal from an I/O module to the CPU, indicating that it is ready to transfer data or an event has occurred.

A specific piece of code executed by the CPU when an interrupt occurs. The ISR handles the data transfer and updates the CPU's status.

When several I/O modules request service at the same time, the CPU needs a mechanism to determine which interrupt to address first. This is handled using priority levels or other interrupt handling schemes.

These are essential components of the Intel 8237A DMA controller chip, used for managing memory-to-memory data transfers. Each register handles specific aspects like channel selection, mask bits for channel enable/disable, data transfer commands, and status flags.

These eight registers within the Intel 8237A DMA controller chip control the DMA operation by managing various aspects like data transfer mode, memory address, and channel behavior.

This bit in the Intel 8237A registers controls the enable or disable state of a specific channel, effectively turning the channel on or off for data transfer.

This bit in the Intel 8237A registers indicates whether the channel has reached the end of the current block of data transferring, signaling completion.

It defines the specific data transfer mode used during DMA operations, allowing for different transfer patterns like single, block or cascade transfers.

A dominant wired networking technology that has evolved to support high data rates and distances, connecting devices like computers, servers, and storage.

A type of Ethernet network where devices connect directly to a central switch, improving data transfer efficiency compared to older bus-based systems.

The primary wireless internet access technology, connecting devices like computers, tablets, and smartphones.

A series of standards that define different versions of Wi-Fi, each offering increased speeds and improved capabilities as technology advances.

The current version of Wi-Fi with a maximum data rate of 3.2 Gbps, primarily known for its high speed and reliability.

A Wi-Fi network designed for businesses to enhance worker productivity and network effectiveness.

Free Wi-Fi access commonly provided in public places, allowing users to access the internet on their mobile devices.

Wi-Fi offers convenience, flexibility, and mobility, allowing users to connect to the internet without physical wires.

A component within the IBM z13 that manages communication between the CPU and I/O devices. It acts as an intermediary, handling data transfer and managing the allocation of resources.

A group of subchannels within an I/O Channel Subsystem. Each set can support up to 64,000 channels, allowing for efficient I/O operations.

A distinct section of the IBM z13 system that can be used for running different operating systems or applications. Each partition has its own resources, including I/O channels.

I/O channels in the IBM z13 serve as high-speed pathways that connect the CPU to external devices. They handle the data exchange between the main processing unit and the I/O modules, enabling efficient data transfers.

The IBM z13 I/O system is designed for efficient handling of data transfers. It employs a hierarchical structure, with logical partitions, channel subsystems, and subchannel sets, allowing for the allocation of dedicated resources and improved performance.