Can someone check if this is correct please

[chelsea9947]

Homework Statement

If the content of d0 is $30 state in words what each of the following numbered instructions will do when placed immediately after the test instruction below
tst d0

Homework Equations

a) bne fred
b) beq fred
c) bpl fred
d) bmi fred

The Attempt at a Solution

a) bne fred = [go to label fred] [if d0] [not equal to $30]
b) beq fred = [go to label fred] [if d0] [equal to $30]
c) bpl fred = [go to label fred] [if d0] [ plus $30]
d) bmi fred = [go to label fred] [if d0] [minus $30]

example

TST or tst direct against zero instruction.

This is really the same as compare with zero

tst <effective address>

it subtracts 0 from a copy of the location specified and sets the condition flags accordingly.
If the value to be tested is positive then +N –0 = +N or if negative –N –0= -N or if 0 then 0-0 =0

tst d0 is d0 equal to 0, greater than zero or less than zero
beq joe go to label joe if d0 equal to 0
bgt dan go to label dan if d0 greater than 0
blt ben go to label ben if d0 less than 0


iam confused can someone help

If the content of d0 is $30 state in words what each of the following numbered instruction pairs will do.

a. cmpi #$30,d0
beq dan

b. cmp.l unknown,d0
bne dan

c. cmp.w d1,d0
bgt dan

 

[Valkarie]

d. cmpa.l d2,d0bmi dana) cmpi #$30,d0 beq dan = [compare the immediate value $30] [with the content of d0] [if d0 is equal to $30] [go to label dan] b) cmp.l unknown,d0 bne dan = [compare the content of the long word unknown] [with the content of d0] [if d0 is not equal to unknown] [go to label dan] c) cmp.w d1,d0 bgt dan = [compare the content of the word d1] [with the content of d0] [if d0 is greater than d1] [go to label dan] d) cmpa.l d2,d0 bmi dan = [compare the content of the long address d2] [with the content of d0] [if d0 is minus d2] [go to label dan]

 

[Mene]

d. cmp.b unknown,d0
blt dan

a. This instruction pair will compare the value in d0 to the hexadecimal value $30. If they are equal, the program will jump to the label "dan".
b. This instruction pair will compare the value in d0 to the value stored in the memory location "unknown". If they are not equal, the program will jump to the label "dan".
c. This instruction pair will compare the word value in d0 to the word value in d1. If the value in d0 is greater than the value in d1, the program will jump to the label "dan".
d. This instruction pair will compare the byte value in d0 to the value stored in the memory location "unknown". If the value in d0 is less than the value in the memory location, the program will jump to the label "dan".