Raghu,

As Rob mentioned you can follow his method except, use EQU instead of DS, (of course you must predefine (or alocate) your registers first).

Rob wrote

>>IOBYTE_1: DS 1

>>10HPMOTOR BIT IOBYTE_1.0
>>SOL_LOAD BIT IOBYTE_1.1
>>....
>>....
>>SOL_REV BIT IOBYTE_1.7

does not work with ASEM_51, but the following works

IOBYTE_1 EQU 20H ; assumed 20H as your base address

SOL_LOAD BIT IOBYTE_1.1
....
....
SOL_REV BIT IOBYTE_1.7

I tried this with ASEM5113 ( ie., ASEM_51 ver 1.3).