... command.equ SRX_BLKOFF_COL =6 ; Wait for column for blink-off command.equ SRX_OFF_GETCOL =7 ; Wait for column byte for LED-off command.equ SRX_OFF_GETROW =8 ; Wait for row byte for LED-off ... take special handling.off_b4: inc r26 subi r16, $08 cpi r16, $00 breq off_ry cpi r16, $01 breq off_rz rjmp rx_finish ; Column out of range.off_ry: ldi r17, $40 rjmp off_doneoff_rz: ldi ... rx_done ; COMMAND - Blink offcmd_notblkon: cpi r16, CHR_BLKOFF brne cmd_notblkoff ldi r17, SRX_BLKOFF_COL sts serialmode, r17 rjmp rx_done ; COMMAND - LED oncmd_notblkoff: cpi r16, CHR_LEDON...