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17. Referring to the definitions of symbols in Fig. 2.10, give the value, type, and intuitive meaning (if any) of each of the following expres- sions: a. BUFFER-FIRST b. BUFFER+4095 c. MAXLEN-1 d. BUFFER+MAXLEN-1 e. BUFFER-MAXLEN f. 2*LENGTH

17. Referring to the definitions of symbols in Fig. 2.10, give the value, type, and intuitive meaning (if any) of each of the following expres- sions: a. BUFFER-FIRST b. BUFFER+4095 c. MAXLEN-1 d. BUFFER+MAXLEN-1 e. BUFFER-MAXLEN f. 2*LENGTH

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
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17. Referring to the definitions of symbols in Fig. 2.10, give the value, type, and intuitive meaning (if any) of each of the following expres- sions: a. BUFFER-FIRST b. BUFFER+4095 c. MAXLEN-1 d. BUFFER+MAXLEN-1 e. BUFFER-MAXLEN f. 2*LENGTH 120 Chapter 2 Assemblers g. 2*MAXLEN-1 h. MAXLEN-BUFFER i. FIRST+BUFFER j. FIRST-BUFFER+BUFEND
Transcribed Image Text:17. Referring to the definitions of symbols in Fig. 2.10, give the value, type, and intuitive meaning (if any) of each of the following expres- sions: a. BUFFER-FIRST b. BUFFER+4095 c. MAXLEN-1 d. BUFFER+MAXLEN-1 e. BUFFER-MAXLEN f. 2*LENGTH 120 Chapter 2 Assemblers g. 2*MAXLEN-1 h. MAXLEN-BUFFER i. FIRST+BUFFER j. FIRST-BUFFER+BUFEND
Line Loc Source statement Object code START STL 5 0000 COPY FIRST 10 0000 RETADR 17202D 13 0003 LDB *LENGTH 69202D 14 BASE LENGTH 15 20 0006 CLOOP +JSUB RDREC 4B101036 032026 000A LDA LENGTH 25 000D COMP #0 290000 30 0010 JEQ ENDFIL 332007 35 0013 +JSUB WRREC 4B10105D 40 0017 J CLOOP 3F2FEC 45 001A ENDFIL LDA =C'EOF' 032010 50 001D STA BUFFER OF2016 55 0020 LDA #3 010003 60 0023 STA LENGTH OF200D 65 70 0026 +JSUB WRREC 4B10105D 002A J ERETADR 3E2003 93 LTORG 002D =C'EOF' 454F46 95 0030 RETADR RESW 1 100 0033 0036 LENGTH RESW 1 105 BUFFER RESB 4096 106 107 1036 BUFEND EQU EQU 1000 МАXLEN BUFEND-BUFFER 110 115 SUBROUTINE TO READ RECORD INTO BUFFER 120 125 1036 RDREC CLEAR B410 130 1038 CLEAR A B400 132 103A CLEAR +LDT TD В40 133 103C #MAXLEN 75101000 135 140 1040 RLOOP INPUT Е32019 1043 1046 1049 332FFA JEQ RD RLOOP 145 INPUT DB2013 150 COMPR A,S A004 155 104B 332008 JEQ STCH EXIT BUFFER, X 57с003 в850 160 104E 165 1051 TIXR T 170 1053 JLT RLOOP 3B2FEA 175 1056 STX RSUB EXIT LENGTH 134000 180 185 1059 4F0000 105C INPUT BYTE X'Fl' F1 195 200 SUBROUTINE TO WRITE RECORD FROM BUFFER 205 B410 4000רר 210 WRREC CLEAR 105D 105F 1062 212 LDT LENGTH 215 WLOOP TD =X'05' Е32011 220 1065 WLOOP 332FFA JEQ LDCH 225 1068 BUFFER, X 53C003 230 106B WD =X'05' DF2008 235 B850 106E 1070 1073 TIXR . T 3B2FEF 4F0000 240 JLT WLOOP 245 RSUB 255 END FIRST 1076 =X'05' 05 n om
Transcribed Image Text:Line Loc Source statement Object code START STL 5 0000 COPY FIRST 10 0000 RETADR 17202D 13 0003 LDB *LENGTH 69202D 14 BASE LENGTH 15 20 0006 CLOOP +JSUB RDREC 4B101036 032026 000A LDA LENGTH 25 000D COMP #0 290000 30 0010 JEQ ENDFIL 332007 35 0013 +JSUB WRREC 4B10105D 40 0017 J CLOOP 3F2FEC 45 001A ENDFIL LDA =C'EOF' 032010 50 001D STA BUFFER OF2016 55 0020 LDA #3 010003 60 0023 STA LENGTH OF200D 65 70 0026 +JSUB WRREC 4B10105D 002A J ERETADR 3E2003 93 LTORG 002D =C'EOF' 454F46 95 0030 RETADR RESW 1 100 0033 0036 LENGTH RESW 1 105 BUFFER RESB 4096 106 107 1036 BUFEND EQU EQU 1000 МАXLEN BUFEND-BUFFER 110 115 SUBROUTINE TO READ RECORD INTO BUFFER 120 125 1036 RDREC CLEAR B410 130 1038 CLEAR A B400 132 103A CLEAR +LDT TD В40 133 103C #MAXLEN 75101000 135 140 1040 RLOOP INPUT Е32019 1043 1046 1049 332FFA JEQ RD RLOOP 145 INPUT DB2013 150 COMPR A,S A004 155 104B 332008 JEQ STCH EXIT BUFFER, X 57с003 в850 160 104E 165 1051 TIXR T 170 1053 JLT RLOOP 3B2FEA 175 1056 STX RSUB EXIT LENGTH 134000 180 185 1059 4F0000 105C INPUT BYTE X'Fl' F1 195 200 SUBROUTINE TO WRITE RECORD FROM BUFFER 205 B410 4000רר 210 WRREC CLEAR 105D 105F 1062 212 LDT LENGTH 215 WLOOP TD =X'05' Е32011 220 1065 WLOOP 332FFA JEQ LDCH 225 1068 BUFFER, X 53C003 230 106B WD =X'05' DF2008 235 B850 106E 1070 1073 TIXR . T 3B2FEF 4F0000 240 JLT WLOOP 245 RSUB 255 END FIRST 1076 =X'05' 05 n om
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