It's not only feasible but wasn't uncommon is operating systems level coding.
-----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Bill Fairchild Sent: Monday, September 12, 2005 9:45 AM To: [email protected] Subject: Re: Documentation for the New Instructions for the z9 Processor In a message dated 9/11/2005 1:53:28 P.M. Central Daylight Time, [EMAIL PROTECTED] writes: >Moreover, even where the properties of an instructiion can be guessed >at >with high reliability, as is the case with more than half of those in the >list, we shall not, as a practical matter, be able to use them until John >Ehrman and his colleagues are able to provide HLASM support for them. If, for example, you knew precisely how the LA (Load Address) instruction worked but yet the Low Level Assembler of 1966 had not yet been enhanced to support LA, you could always write code like this: * LA R3,WHATEVER DC 0H'0',X'4130',S(WHATEVER) and your code would work. This is somewhat difficult, and perhaps not interesting to most of us. As you say, this might not be practical. But it is feasible. Bill Fairchild ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
