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102 lines
2.3 KiB
Text
102 lines
2.3 KiB
Text
;
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; D52 V3.3.6 8052 Disassembly of test.hex
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; 01/23/05 12:15
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;
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org 0
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;
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start: nop ; 0000 00 .
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ajmp main ; 0001 01 06 ..
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;
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include "myfile.inc"
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;
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ljmp subrtn ; 0003 02 00 24 ..$
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;
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main: rr a ; 0006 03 .
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inc accum ; 0007 05 e0 .` ; note sfr bit def only affects indirect addressing
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inc reg2 ; 0009 05 12 ..
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inc @r0 ; 000b 06 .
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inc @r1 ; 000c 07 .
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inc r0 ; 000d 08 .
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jbc abit3,loop ; 000e 10 e3 05 .c.
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acall subrtn ; 0011 11 24 .$
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lcall subrtn ; 0013 12 00 24 ..$
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loop: rrc a ; 0016 13 .
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dec a ; 0017 14 .
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dec reg0 ; 0018 15 10 ..
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dec @r0 ; 001a 16 .
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dec @r1 ; 001b 17 .
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dec r0 ; 001c 18 .
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cjne a,#counter,loop ; 001d b4 12 f6 4.v ; do the loop
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mov dptr,#vectbl ; 0020 90 00 2a ..*
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jmp @a+dptr ; 0023 73 s
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;
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; This is a subroutine.
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;
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subrtn: nop ; 0024 00 . ; do nothing routine
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nop ; 0025 00 . ; these nops would not be disassembled
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nop ; 0026 00 . ; without the 'c' directive
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nop ; 0027 00 .
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nop ; 0028 00 .
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ret ; 0029 22 "
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;
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vectbl: dw subrtn ; 002a 00 24 .$
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dw start ; 002c 00 00 ..
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;
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; 't' directive for ascii text
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;
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message: db 'This is text' ; 002e
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db 0 ; 003a .
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;
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; Data - 'b' and 'w' directives
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;
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db 0 ; 003b . ; binary data
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db 1,2,3 ; 003c ...
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;
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dw 10h ; 003f 00 10 .. ; word data
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dw 20h ; 0041 00 20 .
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dw 30h ; 0043 00 30 .0
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;
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;
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; would get junk from 45h to 48h if not for the 'i' directive
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;
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org 49h
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;
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mov r0,#five ; 0049 78 05 x. ; example of operand name 'x' directive
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X004b: clr membit ; 004b c2 20 B ; 'm' bit addressable memory directive
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djnz r0,X004b ; 004d d8 fc X|
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ret ; 004f 22 "
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;
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; Register/Memory Equates
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;
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reg0 equ 10h
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reg2 equ 12h
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;
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; SFR Equates
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;
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accum equ 0e0h
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;
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; SFR bit Equates
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;
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abit3 equ 0e3h
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;
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; Memory bit Equates
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;
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membit equ 20h
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;
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; Symbol equates
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;
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; These are symbols from the control
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; file that are referenced in the code
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;
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counter equ 12h
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;
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; Operand symbol equates
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;
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; These are operand symbols from the control
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; file that are referenced in the code
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;
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five equ 5
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;
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end
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;
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