thankz for all the tips folks - the program is working now. i put an rf module+decoder in the cct to give a rising edge when it recives a 304MHz signal. woz using a switch before and debounce glitches were messing up the interrupt. Ha, and i used labels instead of relative jumps :) Hey kreAture if u want 2 swap notes thats ok by me - email off list?

the code now looks like so :-

shutdown
         COMMAND              ;LCD in Command mode (MACRO)
         LCD_CLR              ;Clear the LCD & home the cursor (MACRO)
         CHARACTER            ;LCD back in Character mode (MACRO)
         STANDBY_MSG          ;LCD message ... system on standby (MACRO)
         bsf     POWER        ;Camera power is OFF
         clrf    flags        ;Flag that EVERYTHING is OFF
         sleep                ;Turn off and await interrupt
         nop

;The interrupt toggles the HUNT flag ON/OFF
;AFTER an interrupt, we're in HUNT MODE so
;write a message about it ....
         COMMAND              ;LCD in Command mode (MACRO)
         LCD_CLR              ;Clear the LCD & home the cursor (MACRO)
         CHARACTER            ;LCD back in Character mode (MACRO)
         HUNT_MSG             ;LCD message ... in hunt mode (MACRO)

power_off
         bsf    POWER         ;Camera power is OFF. Active LOW
         bcf    flags,CAM     ;Flag that power is OFF
check    btfss  flags,HUNT    ;Still in hunt mode?
          goto  shutdown      ;No  - then quit
         call   watch         ;Yes - look for a bandit
         btfss  flags,BANDIT  ;Is a bandit present?
          goto  check         ;No  - keep checkin'
loop01   bcf    POWER         ;Yes - power up the camera. Active LOW
         bsf    flags,CAM     ;Flag that power is ON
         CAMWAIT              ;Let the camera stabilise ~5 secs
         call   watch         ;Look for bandit again
         btfss  flags,BANDIT  ;Still there?
          goto  power_off     ;No  - go back to to checkin'
         call   takepic       ;Yes - still there so take a picture
         CAMWAIT              ;Wait till camera settles
         call   watch
         btfss  flags,BANDIT  ;Is the bandit still around after the shot?
          goto  power_off     ;No  - he's gone so go back to checkin'
         goto   loop01        ;Yes - he's still there so get ready for another shot


*********************************************************
;PORTB PIN EQUATES
;*********************************************************
CONFIG_B  equ b'00011001'      ;TRIS CONFIG IS b'0001 1001'

RC        equ 0     ;INTERRUPT from Radio Control  (INPUT TRISB0=1)
SHOOT     equ 1     ;SHOOT= take a pciture         (OUTPT TRISB1=0)
CAMPWR    equ 2     ;Applies power to battery      (OUTPT TRISB2=0)
CHKBAT    equ 3     ;Monitors battery voltage (I/O)(INPUT TRISB3=1)
DAYNITE   equ 4     ;Monitors Day/Night            (INPUT TRISB4=1)
CK        equ 5     ;LCD clock                     (OUTPT TRISB6=0)
CH        equ 6     ;LCD character bit             (OUTPT TRISB6=0)
EN        equ 7     ;LCD enable                    (OUTPT TRISB7=0)

;********************************************************
;CONSTANTS + DEFS
;********************************************************
HUNT_TOGGLE equ 0x08           ;HUNT FLAG=bit_3, test with b'0000 1000'

#DEFINE  POWER   PORTB,CAMPWR
#DEFINE  PICTURE PORTB,SHOOT

;*********************************************************
;FLAG REGISTER EQUATES
;RB0=interrupt from RF_RX+DECODER. (+) going pulse.
;*********************************************************
BANDIT   equ 0
CAM      equ 1      ;CAM_ON.1 => power ON, CAM_ON.0 => power OFF
XX1      equ 2      ;In reserve ... dummy flag
HUNT     equ 3      ;DTR.1 => HUNT MODE is toggled on/off
BATTERY  equ 4      ;BATTERY.1 => Battery OK, BATTERY.0 => battery BAD
XXX      equ 4      ;In reserve ... dummy flag
XXY      equ 5
XXZ      equ 6
XYX      equ 7




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