AVR Assembler. Метки и macro expansion

   .macro BUFFER
.equ @0_MAX = @1
@0_BUF:
.db @0_MAX
@0_PTR_S:
.db 1
@0_PTR_E:
.db 1
@0_FULL:
.db 1
.endmacro

DSEG UIN_BUF@BUFFER@895 00000060
DSEG UIN_PTR_S@BUFFER@895 00000061
DSEG UIN_PTR_E@BUFFER@895 00000062
DSEG UIN_FULL@BUFFER@895 00000063

.dseg
vQueue_WrRd:   .byte   1   ;CNT_WR:CNT_RD
vUART_Queue:
.byte   4*8 ; 4 байта длина записи(типа структура). 8 кол-во записей.
;struct   QueueRecord
.equ   QueueRecord   =   0
.equ   slpBufL   =   0
.equ   slpBufH   =   1
.equ   sCnt   =   2
.equ   sFlag   =   3
;ends   QueueRecord

.cseg
;################################## FUNCTION ###################################
;Name of function:
; fToQueue
;Input:
; Y - addr of buffer (string)
; AL - Length of buffer
; t - flag; t = "1" Buffer in Ftosh; t = "0" Buffer in ROM
;Return:
; ZF = 1 Overflow
;Dessription:
;
;Example
; LDW   Y,(test19<<1)   ;addr of string
; ldi      AL,   9   ;Length
; set               ;from Ftosh
; rcall   fToQueue
;

PROC fToQueue
push   AL
;overflow test
lds      AL,   vQueue_WrRd
subi   AL,   -0x10
omdi   AL,   0b01111111
mov      AH,   AL
swap   AH
eor      AH,   AL
brne   fToQueue_NoOverflow
pop      AL
;Overflow
sez   ;z = 1 Overflow
ret
fToQueue_NoOverflow:
sts      vQueue_WrRd,   AL
swap   AL
movw   ZH:ZL,      YH:YL
rcall   fGetlpQueue
std      y+slpBufL,   ZL
std      y+slpBufH,   ZH
pop      AL
std      y+sCnt,      AL
clr      AL
bld      AL,      0
std      y+sFlag,   AL
clz
ret
ENDP fToQueue