www.delorie.com/gnu/docs/binutils/as_334.html   search  
 
Buy GNU books!


Using as

[ < ] [ > ]   [ << ] [ Up ] [ >> ]         [Top] [Contents] [Index] [ ? ]

8.21.3 PDP-11 Assembly Language Syntax

as supports both DEC syntax and BSD syntax. The only difference is that in DEC syntax, a # character is used to denote an immediate constants, while in BSD syntax the character for this purpose is $.

eneral-purpose registers are named r0 through r7. Mnemonic alternatives for r6 and r7 are sp and pc, respectively.

Floating-point registers are named ac0 through ac3, or alternatively fr0 through fr3.

Comments are started with a # or a / character, and extend to the end of the line. (FIXME: clash with immediates?)


  webmaster   donations   bookstore     delorie software   privacy  
  Copyright 2003   by The Free Software Foundation     Updated Jun 2003