interrupt routine wont work!

[tmach]

Hello All,

I am trying to toggle pin RD1 on a H->L external interrupt. Initially I set RD1 to high in main and then on an external interrupt from H->L, I set it permanently low.
I see that RD1 stays high on powerup and does not go low even afer a H-L interrupt on RB0. Here is the relevant code. Please explain why I see this unusual behavior. I use PIC16F874A and PCM compiler.

Thanks.
mach

***********************************************************
port declares;

#INT_EXT

intRB0()
{
#asm
BCF 0x3, 0x5 select Bank 0
BCF 0x8, 0x1 clear RD1 high
#endasm
}


main()

{

ENABLE_INTERRUPTS(INT_EXT);

ENABLE_INTERRUPTS(GLOBAL);

EXT_INT_EDGE(H_TO_L);

//port initialization

#asm
CLRF 0x03 // Bank0
CLRF 0x05 // Initialize PORTA by clearing output
CLRF 0x06 // Initialize PORTB by clearing output
CLRF 0x07 // Initialize PORTC by clearing output
CLRF 0x08 // Initialize PORTD by clearing output
CLRF 0x09 // Initialize PORTE by clearing output
// data latches
BSF 0x03, 5 // Select Bank1
MOVLW 0xFF // Value used to initialize data direction
MOVWF 0x85 // PORTA<7:0> = inputs
MOVLW 0xFF // Value used to initialize data direction
MOVWF 0x86 // PORTB<7:0> = inputs
MOVLW 0xBE // Value used to initialize data direction
MOVWF 0x87 // PORTC<7:0> = inputs
MOVLW 0xFD // Value used to initialize data direction
MOVWF 0x88 // PORTD<7:0> = inputs
MOVLW 0xFF // Value used to initialize data direction
MOVWF 0x89 // PORTE<7:0> = inputs

#endasm

output_high(PIN_D1);

while(true)
{
software SPI statements;
}

}

**********************************************************

[tmach]

Just to avoid confusion, I should say that in my ISR, two statements are commented

intRB0()
{
#asm
BCF 0x3, 0x5 //select Bank 0
BCF 0x8, 0x1 //clear RD1 high
#endasm
}

[Neutone]

This is how I setup discrete IO. It is easier to read like this. I think you were settings the TRIS in the wrong bank.