Question

NAME: TEST 3 SPRING 2019 1. Exchange the content of internal RAM location FFH and external RAM location FF00H. Hint: Use the MOVX instruction to access the external data memory with DPTR as the addressing pointer (MOVX A, @DPTR and MOVX @DPTR, A). ORG 0000H JMP MAIN ORG 30H MAIN: MOV DPTR, # FF00H MOV A, @DPTR ; move from external me MOV R1, FFH MOV FFH, A ; save external MOV A, R1.

          NAME:
TEST 3
SPRING 2019
1.
Exchange the content of internal RAM location FFH and external RAM location FF00H.
Hint: Use the MOVX instruction to access the external data memory with DPTR as the addressing
pointer (MOVX A, @DPTR and MOVX @DPTR, A).
ORG
0000H
JMP
MAIN
ORG
30H
MAIN:
MOV DPTR, # FF00H
MOV A, @DPTR ; move from external me
MOV R1, FFH
MOV FFH, A ; save external
MOV A, R1.

NAME:
TEST 3
SPRING 2019
1.
Exchange the content of internal RAM location FFH and external RAM location FF00H.
Hint: Use the MOVX instruction to access the external data memory with DPTR as the addressing
pointer (MOVX A, @DPTR and MOVX @DPTR, A).
ORG
0000H
JMP
MAIN
ORG
30H
MAIN:
MOV DPTR, # FF00H
MOV A, @DPTR ; move from external me
MOV R1, FFH
MOV FFH, A ; save external
MOV A, R1.

Added by Zoe B.

Computer Science and Information Technology

Trishna Knowledge Systems 2018 Edition

Instant Answer

Solved by Expert Liam Haas-Neill

Step 1

The first instruction is ORG H0000, which sets the origin of the program to address H0000. This is the starting point of the program. Show more…

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NAME: TEST 3 SPRING 2019 1. Exchange the content of internal RAM location FFH and external RAM location FFOOH. Hint: Use the MOVX instruction to access the external data memory with DPTR as the addressing pointer (MOVX A,@DPTR and MOVX @DPTR,A). ORG H0000 JMP MAIN MAIN: MOV A, @DPTR MOVX A, @DPTR MOV A, @FFH MOV @FFH, A MOV A, @FFOH MOV @FFOH, A END 1070