Yes Babar,

Steve is right.

I think your assembler should also work for PUSH/POP. Even I had the same feeling when started working with Metalink's assembler.

You may try the same with your assembler as I tried with Metalink.

It works fine for example, if I write the code

MOV A,#0FFh ; for example,

But when I write,
PUSH A

It does not accept, It excepts to write the code as
PUSH ACC ; not on A, It requires ACC

But this is for Accumulator only, other registers, for example PSW works fine.

Try it out, otherwise better to switch to Metalink. Though I am not very experienced, but can help you if you need any.

Best Regards,

Rauf