MAX187 AD converter from LPT port

[hsimola]

Could somebody help me with following code. Problem is that I don't know where to put or how to include code which enables pins 4-7 (MAX187 takes power from pins)

So, pins 4-7 have to be enabled before trying to read data from LPT port connected MAX187. That's problem. I can't do it.



------------------------------------------------------------------------
------------------------------------------------------------------------
asm
PUSH EBX
PUSH ECX
PUSH EDX

xor ebx,ebx
mov ecx,12
xor eax,eax
mov edx,370h
out dx,al
//*****************
add dx,9
@Tsek: // Here it stucks if pins 4-7 are not enabled
in al,dx
and al,20h
jz @Tsek
//*****************
@LuePorttia_12x:
shl bx,1
dec dx
mov al,2
out dx,al
xor al,al
out dx,al
inc dx
in al,dx
and al,20h
jz @zero
inc bx
@zero:
loop @LuePorttia_12x
//*****************
mov al,1
dec dx
out dx,al
mov[jannite],bx

MOV DX,0378H // enables pins 4-7
MOV AL,60 //
OUT DX,AL //


POP EDX
POP ECX
POP EBX

end;
------------------------------------------------------------------------

 

[TripleFault]

Is that pins 4-7 or bits 4-7. You could try to do this:
1. Read port 888
2. X-OR port 888's value w/ 11110000
3. Write the new value to the port

I'm not sure if it will work for your purpose but it's worth a shot.
~ TripleFault !)