if i read it correctly you want to know this.

if (17.0 <= x ) and ( x <= 19.6 ) then TRUE else FALSE

    movf    MSB,w
    sublw    .16        ; 16 - MSB = ?
    btfsc    status,c
    goto    return_false    ; MSB is 16 or less

    movf    MSB,w
    sublw    .19        ; 19 - MSB
    btfss    status,c
    goto    return_false    ; MSB it greater than 19
    btfss    status,z
    goto    return_true

    movf    LSB,w
    sublw    .6        ; 6 - LSB
    btfss    status,c
    goto    return_false
    goto    return_true

this code is not debugged (and assume it's buggy) but will give you an idea
of how to start.

michael

You may leave the list at any time by writing "SIGNOFF PICLIST" in the
    body of a message to LISTSERV@MITVMA.MIT.EDU.

-----Original Message-----
From: Mauro Costa Sollar <lurdinha@newagetel.com.br>
To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU>
Date: Thursday, October 01, 1998 2:10 PM
Subject: how to compare number - (DS1624)


>Hi All,
>
>        i'm working with the sensor of temperature DS1624 (I2C),
>it me return 2 bytes MSB=data integer and LSB=data decimal, how to
>compare this data with one table of temperature range, or where find
>routines of this type.
>
>Ex.:  the data sensor is:  18,5
>
>
>        my table:  15,2 to 16,9
>                   17,0 to 19,6  item is true (on range of 18,5)
>                   19,7 to 22,2
>
>
>thanks,
>
>Mauro Costa Sollar
>