Please provide comments for all instructions.

What is the memory mapped address for the console output and keyboard input?

Please identify the specific line of code that prints to console and reads the

keystroke.

PART A $-$ Output: Printing character to the display

The memory addresses associated with the console output I$/$O device are:

OxffffoO$00$ is the console $($output$)$ data port

Oxfffoon$4$ is the console $($output$)$ status port where bit $7$ is the ready flag $(0$: not

ready. $1$: ready$)$

Printing a character is achieved by:

Checking the ready flag to see if device is ready for printing, i$.$e$.,$ check if the bit $7$

of the output status port is set to $1$

Storing the character to the output data port

I Prints "Hello, workln" in the message area.

begin

BASE $.$equ Ox$3$ffic$0!$Starting point of the memory mapped region

COUT $.$equ ox$0$ IOxfffiono Console Data Port

COSTAT equ Ox$4$ IOxfffo$004$ Console Status Port

Loop: $,$ Id String$],\%$r$3!$Load next char into $r3$

addcc $\%,3,\%rO,\%$

$.$org $2048$

add $\%rO,\%rO,\%r2$

add $\%rO,\%rO,\%r4$

sethi BASE, $\%$r$4$

be End $!$stop if null

Wait: Idub $[\%$r$4+$COSTAT$],\%$r $1$

andoc $\%$r$1,0$x$80,\%$r$1$

be Wait

stb $\%r3,[\%r4+$COUT$]!$Print to console

add $\%$r$2,4,\%$r$2$ lincrement String offset $(r2)$

ba Loop

End: halt IA non$-$standard instruction to stop the simulator

$.$org $3000$

$!$ The "Hellow, world!" string

String: $,048,065,06c,06c,06f$

$02c,020,077,06f,072$

$06c,064,021,00a,0$

$,$end

What is the memory address at each applicable line?