To do text input/output in EASy68K put the task number in register D0 then do TRAP #15. Look at the programs in the EASy68K examples folder for more examples. I've changed your program to display the two messages. Just put the numbers you want for X1,Y1 etc in the code. I have not verified the correctness of this program, I'll leave that up to you.
Code:
*-----------------------------------------------------------
* Program :
* Written by :
* Date :
* Description:
*-----------------------------------------------------------
START ORG $8000
MOVE.W X1,D0
BSR QUAD
CMP.W Y1,D1
BNE BAD
MOVE.W X2,D0
BSR QUAD
CMP.W Y2,D1
BNE BAD
MOVE.W X3,D0
BSR QUAD
CMP.W Y3,D1
BNE BAD
MOVE.W X4,D0
BSR QUAD
CMP.W Y4,D1
BNE BAD
MOVEA.L #PASS,A1
SEND MOVE #13,D0 task #13 = display null terminated string pointed to by A1
TRAP #15 perform the task
MOVE.B #9,D0
TRAP #15 Halt Simulator
BAD MOVEA.L #FAIL,A1
BRA SEND
QUAD MOVE.W D0,D1
MULS D0,D1
MULS #5,D1
MULS #2,D0
SUB.W D0,D1
ADD.W #6,D1
RTS
X1 DC.W 0
Y1 DC.W 6
X2 DC.W 1
Y2 DC.W 9
X3 DC.W 10
Y3 DC.W 486
X4 DC.W 100
Y4 DC.W 49806
PASS DC.B 'Subroutine passes.',0
FAIL DC.B 'Subroutine fails.',0
END START