for at89c2051 what steps should be followed to compile .asm files and get hexcode? i looked the help menu and couldnt get it. i too searched for the topics at other posts. there were articles related to asm coding and not steps for compilation. similar is the case with help menu too.
Yes, that is correct.
"The A51 extension is convention, it is not a requirement and it is not enforced"
Also correct: 'A51' is just the default - you can override the default if you want.
"This, of course, is if the .asm file is legal A51 syntax."
Absolutely! And, as Erik suggests, the fact that it is not using the Keil default is quite a strong hint that it may not be Keil assembler at all...
And, as Per says, it's probably best to stick with the defaults until you are sufficiently familiar with the tools to know how to change them...