All,

 A question about the 10 bit AD on an F877.  Referring to the code snippet
 below, looking at the line indicated ( by **--->), can anyone explain why
 when this reads 'bsf   STATUS,RP0', the program hangs apparently at that
 line.   If we change it to read 'bcf   STATUS,RP0', the program don't hang,
 but we still can't get the 2 bits of the LSB.   We've tried adding a wait
 before changing banks, we've tried changing the justification of the
 result, we've tried changing the order in which we read the result, we've
 cussed at it, etc., etc., but nothing has helped.   I tried calling MCHIP,
 but the phone message says they can't answer the phone at this time, so I
 just left a message.  But I need an answer ASAP.  I prefer not to wait
 until next week when they get back to me, if then.  If you have any
 further questions, email me.

 Does anyone have any ideas to try that I haven't mentioned?   If so, any
 and all are welcome.   Please advise.


                                                Thanks and Regards,

                                                       jim










RdVrp   ; read ASIC pos ref voltage
        errorlevel      -302
        bcf     STATUS, RP0                   ;bank 0
        bcf STATUS, RP1
        movlw   B'01001001'                   ;Fosc/8, A/D chan 1, A/D on
        movwf   ADCON0
        bsf     ADCON0, GO

        movlw   D'1'
        call Wait


VrpWait
        btfsc   ADCON0, GO
        goto    VrpWait

        bcf     STATUS, RP0
        movf    ADRESH, W
        movwf   AccaH

;       movlw   D'2'                            ; wait 2ms
;       call    Wait
;       bcf     PIR1, 6                         ; clear int flag



 **---> bsf     STATUS,RP0                      ; goto page 1



;       movf    ADRESL, W
;       movwf   AccaL
        call    PrintHex
        return

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