#define	MAX3421E_EnMask	$04


#define max3421e_enable()       \
        lda #MAX3421E_EnMask    :\
        jsr spi_enable

#define max3421e_disable()      \
        jsr spi_disable

#define	spi_wra()

/********************************************************************/

#define rPINCTL     (17<<3)

#define bmFDUPSPI   $10

#define bmINTLEVEL  $08

#define wreg(reg, val)          \
        max3421e_enable()       :\
        lda #(reg) | $02       :\
        spi_wra()               :\
        lda #(val)              :\
        spi_wra()               :\
        max3421e_disable()

/********************************************************************/

; unrolled macrois ok
	max3421e_enable()
	lda #(rPINCTL) | $02
	spi_wra()
	lda #(bmFDUPSPI+bmINTLEVEL)
	spi_wra()
	max3421e_disable()

; macro used o give syntax...
        wreg(rPINCTL, bmFDUPSPI+bmINTLEVEL)