217 lines
6.7 KiB
Plaintext
217 lines
6.7 KiB
Plaintext
/* ARM assembly Raspberry PI */
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/* program sysTime.s */
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/* REMARK 1 : this program use routines in a include file
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see task Include a file language arm assembly
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for the routine affichageMess conversion10
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see at end of this program the instruction include */
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/*******************************************/
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/* Constantes */
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/*******************************************/
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.equ STDOUT, 1 @ Linux output console
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.equ EXIT, 1 @ Linux syscall
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.equ WRITE, 4 @ Linux syscall
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.equ BRK, 0x2d @ Linux syscall
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.equ CHARPOS, '@'
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.equ GETTIME, 0x4e @ call system linux gettimeofday
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/*******************************************/
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/* Structures */
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/********************************************/
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/* example structure time */
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.struct 0
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timeval_sec: @
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.struct timeval_sec + 4
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timeval_usec: @
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.struct timeval_usec + 4
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timeval_end:
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.struct 0
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timezone_min: @
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.struct timezone_min + 4
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timezone_dsttime: @
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.struct timezone_dsttime + 4
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timezone_end:
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/*********************************/
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/* Initialized data */
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/*********************************/
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.data
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szMessError: .asciz "Error detected !!!!. \n"
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szMessResult: .asciz "GMT: @/@/@ @:@:@ @ms\n" @ message result
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szCarriageReturn: .asciz "\n"
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.align 4
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tbDayMonthYear: .int 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335
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.int 366, 397, 425, 456, 486, 517, 547, 578, 609, 639, 670, 700
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.int 731, 762, 790, 821, 851, 882, 912, 943, 974,1004,1035,1065
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.int 1096,1127,1155,1186,1216,1247,1277,1308,1339,1369,1400,1430
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/*********************************/
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/* UnInitialized data */
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/*********************************/
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.bss
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.align 4
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stTVal: .skip timeval_end
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stTZone: .skip timezone_end
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sZoneConv: .skip 100
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/*********************************/
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/* code section */
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/*********************************/
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.text
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.global main
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main: @ entry of program
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ldr r0,iAdrstTVal
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ldr r1,iAdrstTZone
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mov r7,#GETTIME
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svc 0
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cmp r0,#-1 @ error ?
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beq 99f
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ldr r0,iAdrstTVal
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ldr r1,[r0,#timeval_sec] @ timestemp in second
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//ldr r1,iTStest1
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//ldr r1,iTStest2
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//ldr r1,iTStest3
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ldr r2,iSecJan2020
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sub r0,r1,r2 @ total secondes to 01/01/2020
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mov r1,#60
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bl division
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mov r0,r2
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mov r6,r3 @ compute secondes
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mov r1,#60
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bl division
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mov r7,r3 @ compute minutes
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mov r0,r2
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mov r1,#24
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bl division
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mov r8,r3 @ compute hours
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mov r0,r2
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mov r11,r0
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mov r1,#(365 * 4 + 1)
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bl division
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lsl r9,r2,#2 @ multiply by 4 = year1
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mov r1,#(365 * 4 + 1)
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mov r0,r11
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bl division
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mov r10,r3
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ldr r1,iAdrtbDayMonthYear
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mov r2,#3
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mov r3,#12
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1:
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mul r11,r3,r2
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ldr r12,[r1,r11,lsl #2] @ load days by year
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cmp r10,r12
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bge 2f
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sub r2,r2,#1
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cmp r2,#0
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bne 1b
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2: @ r2 = year2
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mov r5,#11
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mul r4,r3,r2
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lsl r4,#2
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add r4,r1
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3:
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ldr r12,[r4,r5,lsl #2] @ load days by month
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cmp r10,r12
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bge 4f
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subs r5,r5,#1
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bne 3b
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4: @ r5 = month - 1
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mul r11,r3,r2
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add r11,r5
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ldr r1,iAdrtbDayMonthYear
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ldr r3,[r1,r11,lsl #2]
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sub r0,r10,r3
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add r0,r0,#1 @ final compute day
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ldr r1,iAdrsZoneConv
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bl conversion10 @ this function do not zero final
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mov r4,#0 @ store zero final
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strb r4,[r1,r0]
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ldr r0,iAdrszMessResult
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ldr r1,iAdrsZoneConv
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bl strInsertAtCharInc @ insert result at first @ character
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mov r3,r0
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add r0,r5,#1 @ final compute month
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ldr r1,iAdrsZoneConv
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bl conversion10
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mov r4,#0 @ store zero final
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strb r4,[r1,r0]
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mov r0,r3
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ldr r1,iAdrsZoneConv
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bl strInsertAtCharInc @ insert result at next @ character
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mov r3,r0
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ldr r11,iYearStart
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add r0,r9,r11
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add r0,r0,r2 @ final compute year = 2020 + year1 + year2
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ldr r1,iAdrsZoneConv
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bl conversion10
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mov r4,#0 @ store zero final
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strb r4,[r1,r0]
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mov r0,r3
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ldr r1,iAdrsZoneConv
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bl strInsertAtCharInc @ insert result at next @ character
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mov r3,r0
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mov r0,r8 @ hours
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ldr r1,iAdrsZoneConv
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bl conversion10
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mov r4,#0 @ store zero final
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strb r4,[r1,r0]
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mov r0,r3
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ldr r1,iAdrsZoneConv
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bl strInsertAtCharInc @ insert result at next @ character
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mov r3,r0
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mov r0,r7 @ minutes
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ldr r1,iAdrsZoneConv
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bl conversion10
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mov r4,#0 @ store zero final
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strb r4,[r1,r0]
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mov r0,r3
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ldr r1,iAdrsZoneConv
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bl strInsertAtCharInc @ insert result at next @ character
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mov r3,r0
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mov r0,r6 @ secondes
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ldr r1,iAdrsZoneConv
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bl conversion10
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mov r4,#0 @ store zero final
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strb r4,[r1,r0]
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mov r0,r3
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ldr r1,iAdrsZoneConv
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bl strInsertAtCharInc @ insert result at next @ character
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mov r3,r0
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ldr r1,iAdrstTVal
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ldr r0,[r1,#timeval_usec] @ millisecondes
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ldr r1,iAdrsZoneConv
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bl conversion10
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mov r4,#0 @ store zero final
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strb r4,[r1,r0]
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mov r0,r3
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ldr r1,iAdrsZoneConv
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bl strInsertAtCharInc @ insert result at next @ character
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bl affichageMess
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b 100f
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99:
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ldr r0,iAdrszMessError
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bl affichageMess
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100: @ standard end of the program
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mov r0,#0 @ return code
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mov r7,#EXIT @ request to exit program
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svc 0 @ perform the system call
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iAdrszMessError: .int szMessError
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iAdrstTVal: .int stTVal
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iAdrstTZone: .int stTZone
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iAdrszMessResult: .int szMessResult
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iAdrszCarriageReturn: .int szCarriageReturn
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iAdrsZoneConv: .int sZoneConv
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iSecJan2020: .int 1577836800
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iAdrtbDayMonthYear: .int tbDayMonthYear
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iYearStart: .int 2020
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iTStest1: .int 1609508339 @ 01/01/2021
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iTStest2: .int 1657805939 @ 14/07/2022
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iTStest3: .int 1767221999 @ 31/12/2025
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/***************************************************/
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/* ROUTINES INCLUDE */
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/***************************************************/
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.include "../affichage.inc"
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