I sent this plea for help to Tech-Tools on Oct. 7, 1999 - but have not heard
back from them.  Anyone (left) on the pic list got any ideas?  I am using
ver 4.02 of their TDE and their CVASM16

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I am in the process of writing my first true PIC assembler program, and hate
to bother you but I seem to have a problem.  The code so far is:

device  pic16c74A,xt_osc,wdt_off,protect_off
        org 00
        goto Start
        org 05h
Start
                ;* Set Up Ports
                bcf STATUS, RP0         ;set to bank 0
                bcf STATUS, RP1         ;
                clrf PORTA                      ;clear all ouput latches
                clrf PORTB                      ;clear all output latches
                clrf PORTC                      ;clear all output latches
                clrf PORTD                      ;clear all output latches
                clrf PORTE                      ;clear all output latches
                bsf STATUS, STATUS.5    ;set to bank 1
                movlw 00000111b         ;data to set PA0-PA2 as inputs
                movwf TRISA                     ;set up port A
                movlw 11111100b         ;data to set PB0-PB1 to inputs
                movwf TRISB                     ;set up Port B
                movlw 10010111b         ;data to set PC0-PC2, PC5, PC7 to
inputs
                movwf TRISC                     ;set up Port C
                movlw   11111111b               ;data to set PD0-PD7 to
inputs
                movwf TRISD                     ;set up Port D
                movlw 00000000b         ;data to set PE0-PE2 as outputs
                movwf TRISE                     ;set up Port E
                end

Actually there are comments before the code and a bunch of retlw between the
movwf TRISE and the end statement.  The code built cleanly before adding the
code to set up the ports.  The problem is that the assembler is not
recognizing the RP0 and RP1 symbols.  I tried a couple of others and they
failed also.  The error messages are:

ERROR TSAIL.SRC 188 : bit number must bee from 0 to 7
ERROR TSAIL.SRC 189 : bit number must bee from 0 to 7
ERROR TSAIL.SRC 195 : bit number must bee from 0 to 7

Where   "bcf STATUS, RP0                ;set to bank 0 " is line 188

I did an assembly with the /D option and the symbol table listed :
STATUS=0003, RP0=5003 & RP1=6003  so the symbols seem to be there, but
contain more bits than needed.  The listing notes that subsets of a label
include the primary label value.  So where RP0 is bit 5 of the STATUS
register, it has a value of 5003.

Any help would be appreciated.

David V. Fansler
Network Administrator
TriPath Imaging, Inc. (Formerly AutoCyte, Inc)
336-222-9707 Ext. 261
dfansler@autocyte.com <mailto:dfansler@autocyte.com>
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<http://www.mindspring.com/~dfansler>   Updated September 23, 1999