Hi,

I've always used the tris and option commands for 16F84, ignoring the
warning message, "Use of this instruction not recommended."  Now, I
thought I'd do it the recommended way by bank switching and writing the
registers directly.

I select bank1 (bsf STATUS,RP0), then try to write a value to TRISA, TRISB
or OPTION_REG.  However, in each case I receive the error, "Register in
operand not in bank 0. Ensure that bank bits are correct."

Note that the tris & option reg's appear to be getting set properly, but I
don't think these messages are right.  Anyone know what's going on here?

As a demonstration, consider Example 5-1 from the Microchip data manual
for PIC16F8X...

MPASM 02.30 Released EX5-1.ASM 8-4-2000 0:32:39 PAGE 1
LOC OBJECT CODE LINE SOURCE TEXT
  VALUE
                00001 include "p16F84.inc"
                00001 LIST
                00002 ; P16F84.INC Standard Header File, Version 2.00 Microchip Technology, Inc.
                00136 LIST
2007 3FF1       00002 __config _XT_OSC & _WDT_OFF & _PWRTE_ON
                00003
0000 0185       00004 clrf PORTA
0001 1683       00005 bsf STATUS,RP0
0002 300F       00006 movlw 0x0F
Message[302]: Register in operand not in bank 0.  Ensure that bank bits are correct.
0003 0085       00007 movwf TRISA
                00008
                00009 end


thanks,

-----------------------------------------------------------------------
 David Snyder Hale                     david@isi.mtwilson.edu

 Mount Wilson Observatory
 (626) 568-0304                        http://isi.mtwilson.edu
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