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