drawmode$\_$nothing:

push ra

# Check if left mouse button is pressed

lw t$0,$ display$\_$mouse$\_$pressed

and t$0,$ t$0,$ MOUSE$\_$LBUTTON # Check if bit $0($left mouse button$)$ is set

beq t$0,0,\_$endif$\_$lnotpressed # If left mouse button is not pressed, skip drawing

$\_$endif$\_$lnotpressed:

pop ra

jr ra

# Set drawmode to MODE$\_$BRUSH

li t$0,$ MODE$\_$BRUSH

sw t$0,$ drawmode

# Draw a $1-$pixel$-$long line at current mouse coordinates in current color

lw a$0,$ display$\_$mouse$\_$x # Load current mouse x coordinate

lw a$1,$ display$\_$mouse$\_$y # Load current mouse y coordinate

lw a$2,$ display$\_$mouse$\_$x # Load current mouse x coordinate

lw a$3,$ display$\_$mouse$\_$y

lw v$1,$ color

jal display$\_$draw$\_$line

lw a$0,$ display$\_$mouse$\_$x # Load current mouse x coordinate

lw a$1,$ display$\_$mouse$\_$y # Load current mouse y coordinate

# Set last$\_$x and last$\_$y to current mouse coordinates

sw a$0,$ last$\_$x

sw a$1,$ last$\_$y

li t$0,$ KEY$\_$C

sw t$0,$ display$\_$key$\_$pressed

lw t$0,$ display$\_$key$\_$pressed

beq t$0,$ zero, $\_$return

li t$0,$ MODE$\_$COLOR

sw t$0,$ drawmode

la t$9,$ display$\_$spr$\_$table

addi t$9,$ t$9,4$

#inside your

#initialize outer loop counter

li s$0,0$

#nested for loop

outer$\_$loop:

#initialize inner loop counter

li s$1,0$

inner$\_$loop:

#t$0=$ calculate x cord

mul t$1,$ s$1,8$

add t$0,$ t$1,$ PALETTE$\_$X

sb t$0,0($t$9)$

#calculate y cord

li t$1,$ PALETTE$\_$Y

mul t$1,$ s$0,8$

add t$0,$ t$1,$ PALETTE$\_$Y

sb t$0,1($t$9)$

#calc which tile to use

li t$2,$ PALETTE$\_$TILE

add t$3,$ t$2,$ s$1$

sb t$3,2($t$9)$

#UP TO U

sb t$0,2($t$9)$

#flags are just $1$

li t$0,1$

sb t$0,3($t$9)$

#finally, add $4$ to t$9$ to move to the next sprite

add t$9,$ t$9,4$

#inner loop increment and branch here

add s$1,$ s$1,1$

blt s$1,8,$ inner$\_$loop

#outer loop increment and branch here

add s$0,$ s$0,1$

blt s$1,2,$ outer$\_$loop

$\_$return: # Define the $\_$return label

pop ra

jr ra

drawmode$\_$brush:

push ra

lw t$0,$ display$\_$mouse$\_$released

and t$0,$ t$0,$ MOUSE$\_$LBUTTON # Check if bit $0($left mouse button$)$ is set

beq t$0,1,\_$endif$\_$offscreen # If left mouse button is not released, skip drawing

lw a$0,$ display$\_$mouse$\_$x # Load current mouse x coordinate

lw a$1,$ display$\_$mouse$\_$y # Load current mouse y coordinate

lw a$2,$ last$\_$x # Load last mouse x coordinate

lw a$3,$ last$\_$y

lw v$1,$ color

#if user is off screen

blt$,$ a$0,0,\_$endif$\_$offscreen

blt$,$ a$1,0,\_$endif$\_$offscreen

bge, a$0,128,\_$endif$\_$offscreen

bge, a$1,128,\_$endif$\_$offscreen

j $\_$current$\_$last

$\_$endif$\_$offscreen:

li t$0,$ MODE$\_$NOTHING

sw t$0,$ drawmode

j $\_$return

$\_$current$\_$last: # Load last mouse y coordinate

bne a$0,$ a$2,\_$drawline # If current x does not equal last x$,$ draw line

bne a$1,$ a$3,\_$drawline # If current y does not equal last y$,$ draw line

$\_$drawline:

#draw a line from last$\_$x$/$y to the current mouse coordinates in the current color

#set the last$\_$x and last$\_$y to the current mouse coordinates.

li t$0,$ MODE$\_$BRUSH

sw t$0,$ drawmode

lw a$0,$ display$\_$mouse$\_$x # Load current mouse x coordinate

lw a$1,$ display$\_$mouse$\_$y # Load current mouse y coordinate

lw a$2,$ last$\_$x # Load last mouse x coordinate

lw a$3,$ last$\_$y

lw v$1,$ color

jal display$\_$draw$\_$line

lw a$0,$ display$\_$mouse$\_$x # Load current mouse x coordinate

lw a$1,$ display$\_$mouse$\_$y

sw a$0,$ last$\_$x

sw a$1,$ last$\_$y

$\_$return:

pop ra

jr ra