Stack_and_FramesECE347 Stack and Subs Practice Work PI = 4 1. Show what the stack frame would look...

Question

Stack_and_FramesECE347 Stack and Subs Practice Work PI = 4 1.  Show what the stack frame would look like for each of the following examples.  It is okay to use RTN_Hi and RTN_Lo to indicate return address. a)                                LDS   #$100A                XXXXXXXXXXLDAA  #$27                XXXXXXXXXXPSHA                XXXXXXXXXXLDAA  #$6E                XXXXXXXXXXPSHA                XXXXXXXXXXLDY   #$ABCD                XXXXXXXXXXPSHY                XXXXXXXXXXJSR    MY_SUB                              )                XXXXXXXXXXLDS   #$B010                XXXXXXXXXXLDX   #$E49F                XXXXXXXXXXPSHX                XXXXXXXXXXDES                XXXXXXXXXXLDX   #$927C                XXXXXXXXXXPSHX     DES      LDAA  #$D4                XXXXXXXXXXPSHA                XXXXXXXXXXPULB                XXXXXXXXXXJSR   MY_SUB                                                         2. Determine the value of the stack pointer and the contents of the stack frame after the NOP is executed in the code segment shown.  Use the stack picture included on page 3 to show your answers.     ORG  $A000 STKTOP XXXXXXXXXXRMB  $20 STKBTM    RMB XXXXXXXXXX     ORG          $D100 TEMP1               XXXXXXXXXXFCB           $77 TEMP2               XXXXXXXXXXFCB           $F3     ORG  $0800 MAIN      LDS          #STKBTM      LDX  #TEMP1      PSHX      LDY  TEMP1      PSHY      LDAA  #$50      SUBA  #$10                         XXXXXXXXXXPSHA                         XXXXXXXXXXPSHC      LDAB         #$76      SUBB XXXXXXXXXXTEMP1                         XXXXXXXXXXPSHB                         XXXXXXXXXXPSHC                         XXXXXXXXXXLDX  #$5                         XXXXXXXXXXLDD  #!1003      IDIV                         XXXXXXXXXXPSHB      PSHX      JSR  MY_SUB LOOPBACK        XXXXXXXXXXLDAA        #$14 INF_LOOP         XXXXXXXXXXBRA XXXXXXXXXXINF_LOOP     ORG  $0900 MY_SUB            XXXXXXXXXXLDAB  #$56                         XXXXXXXXXXPSHB                           XXXXXXXXXXINS      NOP      …Stack Frame for problem 2:

Gaurav · Accepted Answer

$100A
	
	$1009
	$27
	$1008
	$6E
	$1007
	$CD
	$1006
	$AB
	$1005
	$RTN_Lo
	$1004
	$RTN_Hi
	$1003
	
A)	LDS #$100A
	LDAA #$27
	PSHA
	LDAA #$6E
	PSHA
	LDY #$ABCD
	PSHY
	JSR MY_SUB
	$B010
	
	$B00F
	$9F
	$B00E
	$E4
	$B00D
	
	$B00C
	$7C
	$B00B
	$92
	$B00A
	
	$B009
	$RTN_Lo
	$B008
	$RTN_Hi
	$B010
	
	$B00F
	$9F
	$B00E
	$E4  
	$B00D
	
	$B00C
	$7C
	$B00B
	$92
	$B00A
	
	$B009
	$D4->RTN_Lo
	$B008
	$RTN_Hi
B)	LDS #$B010
	LDX #$E49F
	PSHX
	DES
	LDX #$927C
	PSHX
	DES
	LDAA #$D4
	PSHA
	PULB
	JSR MY_SUB
C)
	$A020
	
	$A01F
	$00
	$A01E
	$D1
	$A01D
	$F3
	$A01C
	$77
	$A01B
	$40
	$A01A
	$D0
	$A019
	$FF
	$A018
	$D9
	$A017
	$00
	$A016
	$00
	$A015
	$00
	$A014
	$25
	$A013
	$08
	$A012
	$56
	$A011
	
	SP = $A013
ORG $A000
STKTOP RMB $20
STKBTM RMB 1
ORG $D100
TEMP1 FCB $77
TEMP2 FCB $F3
ORG $0800
MAIN	LDS #STKBTM
LDX #TEMP1
PSHX
LDY TEMP1
PSHY
LDAA #$50
SUBA #$10
PSHA
PSHC
LDAB #$76
SUBB TEMP1
PSHB
PSHC
LDX #$5
LDD #!1003
IDIV
PSHB
PSHX
JSR MY_SUB
LOOPBACK 	LDAA #$14
INF_LOOP 	BRA INF_LOOP
ORG $0900
MY_SUB 	LDAB #$56
PSHB
INS
NOP
A)
B)  
C)

Stack_and_Frames ECE347 Stack and Subs Practice Work PI = 4 1. Show what the stack frame would look like for each of the following examples. It is okay to use RTN_Hi and RTN_Lo to indicate return...

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