9.1 a. What is a device register? b. What is a device data register? c. What is a device status register?

(a) A device register is a register (or memory location) that is used for data transfer

to/from an input/output device. It provides a means of communication between the

processor and the input/output device. The processor can poll this register to find out

whether it has received an input or it can send an output from/to the specific device that the device register belongs to. In memory mapped I/O device registers are dedicated memory locations for each I/O device. There may be more than one device register (dedicated memory location) for one device.

(b) A device data register is a device register (a dedicated memory location in

memorymapped I/O) that holds the data that is to be input/output.

(c) A device status register is a device register (a dedicated memory location in

memorymapped I/O) that indicates the status of the input/output. It allows for the

processor to know whether or not input/output of the value in the device data register has occurred. Basically it is an important step to achieve synchronization in an asynchronous I/O system.

okay, so i know we just goofed around in that chat, but ive been like genuinly depressed, like medically depressed for almost 4 years now. i had my first panic attack when i was 8. i woke my mum up and told her i felt like i was in a dream. like i was a goldfish in a bowl, looking at all these things going on around me and feeling . tiny. wort hless. and i now am now 17 y/o. i still feel those emotions daily. life used to go by so quick.like every day i would wake up and just like want to go back to bed cause i always felt like i was in the wrong place. i guess looking back, i was in the wrong state of mind. i took a expensive like nice trip to whyoming with my grandfather and ha ted it. like idk why. i would have loved it now, but i found myself writing in a journal everyday because i would forget what happened the day before, couldnt remember what i ate for like the previous meal. just my memory left me for the week i was there. worst feeling ive ever experienced.