> -----Original Message----- > From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On > Behalf Of Adam Thornton > Sent: Tuesday, September 13, 2005 1:12 PM > To: [email protected] > Subject: Re: Xen and Linux on z/Series > > > On Sep 13, 2005, at 1:34 PM, Stephen Frazier wrote: > > > Why not just open source VM? It is already almost. If you have VM > > you can get > > 99% of the source now. If IBM would make the part of VM open source > > that is > > already available, then both they and their customers would receive > > a lot of > > benefits. > > Yeah! OCO is Loco! > > Adam
I'll bet (don't know) that part of what is OCO is some of the "special" instructions which are not generally documented. I've read over on IBM-MAIN, that there exists a "document" of describing some of these instructions which cost $10,000 per photocopied page! I don't know if that is true or not. I do recall that the QETH module was originally OCO due to the fact that IBM did not want people to know/understand how the OSA worked. I don't know of anybody who makes an OSA equivalent, but I guess IBM thought it was so radically advanced that disclosing information about it would be foolish. Much of z/OS is OCO because: (1) IBM doesn't want people to use "internal" interfaces, probably because it forces IBM to "freeze" the interface thus inhibiting changing it radically; (2) it is a good way to make some money by selling the information under an NDA. -- John McKown Senior Systems Programmer UICI Insurance Center Information Technology This message (including any attachments) contains confidential information intended for a specific individual and purpose, and its' content is protected by law. If you are not the intended recipient, you should delete this message and are hereby notified that any disclosure, copying, or distribution of this transmission, or taking any action based on it, is strictly prohibited. ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
