Read array in sequence, and convert it's contents into single variable?

Hello, say I have 32 bit array, in each of it's "cells" is written either 1 or 0. I want to read this array in a way, that these cells add next to each other. Say, content of first 4 cells is "1" "1" "0" "1". How can I convert it into single byte variable, which will read as "1101" ?. If there were string variables, then task would be simple, by just reading current array position into string variable, and adding to itself. But in PBP we don't have string variables, how should I ?

like this maybe

Code:

---

myarray var byte[4]  ; a 32 bit array
  nbyte  var byte                    ;result
 
 inx    var byte                        ;start index in array
  x    var byte

arraywrite myarray,[105,100,10,116] ; fill array


 inx=3                                        ;  start a bit 3
 nbyte=0                                  ;clr result

 for x= 0 to 3                              ;get the 4 bits           
 nbyte.0[x] = myarray.0[x+inx]
 next

 serout2 PORTa.0,84, [13,10,"nb ",bin4 nbyte ]

---

How do you want to work with it afterwards? did you want to process it as decimal 1101 or binary 1101 or just "string" 1101?

I want to convert it to decimal and use in that way.

Sorry, I'm confused on this. You want to take each nibble and convert it to a decimal value, or???

No, imagine array consists of "1" "0" "1" "1" digits, I want to "merge" them into one binary variable, which I will convert to decimal later.

so where is the problem ?
what have you tried ?