i have changed the line outportb(Data, Ins) to P1 = Ins; in my c file

it is working alright.


my compiler generated the following asm code for C code line

Ins is parameter to Put_Ins function "Put_Ins(unsigned char Ins)"

#define Data 0x90

// outportb(Data,Ins);

push bp
mov bp,sp
mov a,bp
add a,#0fdh
mov r1,a
mov a,@r1
push acc
clr a
push acc
mov a,#090h
push acc
clr a
push acc
lcall _outportb
mov a,sp
clr c
subb a,#4
mov sp,a


Whether this code is correct or compiler has bug ?

i am not good in assembly language


thanks to all


Haribabu.