On Mon, 22 Oct 2012 22:59:27 -0500, Shmuel Metz (Seymour J.) <wrote: >In <[email protected]>, on >10/22/2012 > at 11:50 AM, Tom Marchant <[email protected]> said: > >>"A Programmer's >>Introduction to IBM System/360 Assembler Language - Student Text". > >The one with the incorrect explanation of PACK and UNPK?
Hmmm.... If so, I don't see the errors. Perhaps it has been corrected. This is the -6 edition of the book, published in August, 1970. I do see where it has, "The Pack instruction does not check zones, except in the rightmost byte..." It doesn't check the rightmost zone, but it does move it. Is that what you mean? -- Tom Marchant ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
