; avoid using R20..23 so that users can have them for interrupt handler
	;
.define    QUOT    r8     ; Quot/Prod LSByte
.define    QUOTm   r9
.define    QUOTh   r10
.define    QUOThh  r11    ; Quot/Prod MSByte

.define    MANT1   r16    ; ACC1 LSByte
.define    MANT1m  r17
.define    MANT1h  r18
.define    MANT1hh r19    ; ACC1 MSByte

.define    MANT2   r24    ; 32bit Multiplier/Divisor
.define    MANT2m  r25
.define    MANT2h  r26
.define    MANT2hh r27
.define    count   r30    ; bit count