;======================================================================

;----------------------------------------
serial_addbyte
;  W		byte for transmission to host	trashed
;  FSR0		any				set for serial_addbyte_another
;  outmsg_*	buffer not full			adjusted appropriately
;  STATUS	any				trashed
;  all others	any				not interfered with
;
	mov_lfsr outbuf, 0
	mov_ff	outmsg_end, FSR0L
;...
serial_addbyte_another
;  W		byte for transmission to host	trashed
;  FSR0		from serial_addbyte[_another]	set for serial_addbyte_another
;  outmsg_*	buffer not full			adjusted appropriately
;  STATUS	any				trashed
;  all others	any				not interfered with
;
	mov_wf	POSTIN0C
	bc_f	FSR0L, 7
	mov_fw	FSR0L
	mov_wf	outmsg_end
	xor_wfw	outmsg_begin
	bra_z	serial_addbyte_toomany
	return

;-----
serial_addbyte_toomany panic morse_HB