Myke,

How's the peepers coming along?   All is well I hope.
I also hope the Christmas season so far has been
good to you and your family.

                                                    Regards,

                                                        Jim
-----Original Message-----
From: Myke Predko <myke@PASSPORT.CA>
To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU>
Date: Tuesday, December 28, 1999 8:29 PM
Subject: Re: Help beginner programmer


>Hi Brian,
>
>Quick reply to your questions.
>
>The application looks good, the only comment I have is on the statement:
>
>> bcf     TRISB & 0x07f, 0        ; Set bit 0 to output
>> Here is where I have trouble.  If I understand this correctly,  this
>should
>> take 00000000 and (and) it
>> with 01111111.  Am I right?
>
>Most people would consider this to be 11111110, with bit 0 being on the
>right.
>
>Other than that (and it's a nit), the code looks good.
>
>> Another thing I want to know is how can you clear PortB if you don't
>switch
>> banks first?  I mean according to Mykes book,  which is where I copied
>this
>> program from, the above code says it is ok to clear PortB, but to set the
>> I/O direction, you need to switch banks first.
>
>If you write directly to the Port register, the new value will be saved
even
>though the port bits are in input mode.  Once the Port register bits are
put
>into output mode, then the values written to them will be driven out of the
>pins.
>
>Does this help explain it?
>
>myke
>