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BLE_H =$00     rjmp RESET .def A =r13 .def B =r14 .def cnt2 =r15 .def cnt1 =r16

BLE_H =$00     rjmp RESET .def A =r13 .def B =r14 .def cnt2 =r15 .def cnt1 =r16

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question

What does the following code segment and subroutine do?

.equ SIZE =128
.equ TABLE_L =$60
.equ TABLE_H =$00

    rjmp RESET

.def A =r13
.def B =r14
.def cnt2 =r15
.def cnt1 =r16
.def endL =r17
.def endH =r18

mystery:

mov ZL,endL
mov ZH,endH
mov cnt2,cnt1
i_loop: ld A,Z
    ld  B,-Z
    cp A,B
    brlo L1
    st Z,A
    std z+1,B
L1: dec cnt2
    brne i_loop
    dec cnt1
    brne mystery
    ret

Converts temperature values from one scale to another

Adds a constant to a table of bytes

Sorts numbers in ascending order

Converts ASCII characters from lower case to upper case

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