Re: ICC Console
On Thu, 26 Jul 2007 09:20:38 -0400, Andy White [EMAIL PROTECTED] wrote: We have the same definition I wonder if its the Attachmate or Bluezone sessions we have set up neither works, they work as a tn3270 (meaning I can get a vtam10 screen and logon) but as console it gets the error. Andy Internet: Mailto:[EMAIL PROTECTED] Could this be a finger mistake on the config panel ? tn3270 type instead of operator console type ? Yeah i know it looks too simple !( but that would explain why it works with vtam and not with console , and the machine is the only thing you changed ? right ? Bruno Bruno(dot)sugliani(at)groupemornay(dot)asso(dot)fr -- 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
Re: Usage of KB and KiB
On Sat, 28 Jul 2007 06:41:41 -0600, Steve Comstock [EMAIL PROTECTED] wrote: R.S. wrote: Bruce Hewson wrote: Well folks, until M$ came along, and before KiB became a standard, I was taught the convention as: Disk: always use decimal value, i.e. KB = 1000 Bytes. Memory: always use binary value, i.e. KB = 1024 Bytes. That made it easy:. It's not easy. For example, you cannot dump 15MB region of memory (RAM) to 15MB file. It doesn't mention tapes, wires (10MB/s - is it binary or decimal ?), etc. Now with M$ (and others), you never know where they use 1000 or use 1024 in their arithmetic to calculate the number they report to you on memory or disk usage. Very much like the Mix-N-Match shops. I learned in 'computers' K is 1024 and salaries K is 1000. So 15M of memory dumps into 15M files just fine unless you decide to use VB or some other utility that adds its own data and forget to account for that. Fairly easy to know which value for K is being used, the sneakiest. Otherwise thy would declare up front what K represents. -- 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
some basic questions about Z system, Zlinux....
Hi every one. I am just confused with all of these terms, please let me know whether i am right about them or not. Zlinux : A linux which is compiled for Z Architecture, whether 31 bit or 64 bit. like Slack, Suse or centOS System Z: An specific operating system made by IBM for its architecture, what is its differences with the Zlinux? Current Z System version is 1.8 and Z/OS is old name of this operating system. Z/ VM: A virtual machine like Virtual PC, that can be installed into Z System and then we can install guest OSs ( What kind of OS can be quest, does an ordinary linux can be quest or we will need specific linux versions, can we install windows?) current Z/ VM version is 5 S390 : It is name of hardware, and these hardware can have a Z system installed on it. Is there any book which could give me overall knowledge about these OSs and names and what they generally do? Thanks -- 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
Re: Usage of KB and KiB
Kenneth E Tomiak wrote: On Sat, 28 Jul 2007 06:41:41 -0600, Steve Comstock [EMAIL PROTECTED] wrote: R.S. wrote: Bruce Hewson wrote: Well folks, until M$ came along, and before KiB became a standard, I was taught the convention as: Disk: always use decimal value, i.e. KB = 1000 Bytes. Memory: always use binary value, i.e. KB = 1024 Bytes. That made it easy:. It's not easy. For example, you cannot dump 15MB region of memory (RAM) to 15MB file. It doesn't mention tapes, wires (10MB/s - is it binary or decimal ?), etc. Now with M$ (and others), you never know where they use 1000 or use 1024 in their arithmetic to calculate the number they report to you on memory or disk usage. Very much like the Mix-N-Match shops. I learned in 'computers' K is 1024 and salaries K is 1000. So 15M of memory dumps into 15M files just fine unless you decide to use VB or some other utility that adds its own data and forget to account for that. Fairly easy to know which value for K is being used, the sneakiest. Otherwise thy would declare up front what K represents. Not that easy. Computer networking speeds are 1000, not 1024. A 1Gb Ethernet connection is 1,000,000,000. As stated hard drive manufactures use 1000, not 1024. A 320GB hard drive holds 320,000,000,000 bytes, not 34,597,383,680. As to file sizes, well you say a 1MB file is 1,024,000 bytes, I might not. Then you have MS issues. When using Windows explorer a file show as 1 KB Right click on it and select properties it shows 55 bytes of actual size, but that it takes 4096 bytes of disk space. So what is the size, 55, 1KB (is this 1024 or 1000 bytes?), or 4096 bytes. About the only thing that is constant is that memory is base on 1024. -- 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
Re: some basic questions about Z system, Zlinux....
legolas wood wrote: Hi every one. I am just confused with all of these terms, please let me know whether i am right about them or not. Zlinux : A linux which is compiled for Z Architecture, whether 31 bit or 64 bit. like Slack, Suse or centOS You are correct, but in my opinion is a bad term. You don't hear, at least I don't, people refering to pLinux (PowerPC), or iLinux (Intel), aLinux (AMD) sLinux (Sparc), or any other letter Linux to indicate they are running a Linux that is compiled for a specific CPU platform. System Z: An specific operating system made by IBM for its architecture, what is its differences with the Zlinux? Current Z System version is 1.8 and Z/OS is old name of this operating system. SystemZ is the current IBM mainframe hardware architecture, not a OS. z/OS is one of the OS's that can run on SystemZ comptuers. Z/ VM: A virtual machine like Virtual PC, that can be installed into Z System and then we can install guest OSs ( What kind of OS can be quest, does an ordinary linux can be quest or we will need specific linux versions, can we install windows?) current Z/ VM version is 5 z/VM is a full OS that does machine virtualzation, same theory as Virtual PC, but Virtual PC is software that must be installed on top of an existing OS. S390 : It is name of hardware, and these hardware can have a Z system installed on it. S390 is the older mainframe hardware architecture. Is there any book which could give me overall knowledge about these OSs and names and what they generally do? Thanks Here is a link for basics of z/OS http://www.redbooks.ibm.com/abstracts/sg246366.html Technical over view of z9: http://www.redbooks.ibm.com/Redbooks.nsf/RedbookAbstracts/sg247124.html?Open Link for various other Redbook in the SystemZ world. http://www.redbooks.ibm.com/portals/systemz -- 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
Re: some basic questions about Z system, Zlinux....
Z/ VM: A virtual machine like Virtual PC It's the other way around. Virtual PC is like z/VM. The first VM came out in 1967 on IBM hardware. Also, zLINUX is not a term that IBM uses. It's LINUX for zSeries, and just happens to be another distribution that runs on a different hardware platform. - Too busy driving to stop for gas! -- 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
Re: KB vs KiB
The NIST website that presents the binary prefixes is: http://physics.nist.gov/cuu/Units/binary.html As many contributors to this thread have emphasized, historical and even current usage of 'K' is not always consistent or accurate. Neither consistency nor accuracy can be retrofitted. Each of us can, however, go forward using Ki (canonically pronounced kee-bee) where multiples of 2^10 = 1024 are intended or K instead where multiples of 10^3 = 1000. John Gilmore Ashland, MA 01721-1817 USA _ Local listings, incredible imagery, and driving directions - all in one place! http://maps.live.com/?wip=69FORM=MGAC01 -- 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
Re: Usage of KB and KiB
On Sun, 29 Jul 2007 16:44:50 -0400, John S. Giltner, Jr. [EMAIL PROTECTED] wrote: About the only thing that is constant is that memory is base on 1024. And, in fact, I do know of an exception. The model numbers of the Atari 68000-based computers were derived from the amount of memory that they had. For example, the 520ST had 512 KiB of memory. -- Tom Marchant -- 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
Re: Coupling Facility
On Thu, 26 Jul 2007 14:29:19 -0500, Joe Kirsch [EMAIL PROTECTED] wrote: We are currently running a homegrown DIV application that uses over 600,480 tracks spread across 24 3390-3 disk packs. Is there a way to put this data in a Coupling Facility that can be shared across four LPARS? Our current CF has 8 GIG. All of the CF documentation I have been reading has been related to DB2 data, CICS, RACF, JES2, and on and on about IBM products. Can you put application data in a CF and what are the limitations? Thanks and have a great day. The Coupling Facility supports three kinds of structures, list, lock, and cache. Each of the 'data types' you reference above is implemented by that product/component into one or more of those structure types to enable high performance sharing of the data between subsystem instances on one or more sysplex members. Unfortunately, DIV is not currently a system component/service that takes advantage of CF services to expand sharing outside a single z/OS image. If you wanted to do such a thing, you would have to implement significant (supervisor state) changes to your application or implement a subsystem that intercepts the application data management calls to effectively implement a sysplex-wide DIV, either in a cache structure or list structure (considerations would include write frequency and memory footprint in CF). In any event, it's not a task for the faint of heart. Scott Fagen z/OS Core Technology Design IBM Poughkeepsie -- 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
Re: Console named *DICNsysclone.
On Thu, 26 Jul 2007 12:56:37 +0200, Barbara Nitz [EMAIL PROTECTED] wrote: yes, that helps quite a bit. So I guess internally everything that was directly sent to a console z/OS 1.6 and lower is now first queued to this EMCS console that another task/tcb will then probably output to the actual green screen/3270 emulation session. Oh, and that EMCS console is active even when that system doesn't have its own green screen. The main point of the first Console Restructure deliverable (z/OS 1.4.2 feature) was to improve the RAS for message delivery. This was accomplished (in part) by centralizing all message delivery through the much more modern EMCS code, rather than in the crunky old (and 24-bit) MCS code. The old code now sits behind the *DIDCS console (which takes on the aggregate routing characteristics of the active (S)MCS consoles on the system). Now, a failure in this code (either due to a message flood or a coding error) no longer impacts all the other key message consumers (EMCS, OPERLOG, SYSLOG). Comm Task is active and running, regardless of whether or not there are any active green screen consoles on the system. The *DIDCS console consumes 1 whole EMCS control block entry and shares the message dataspace with all other EMCS consoles defined by the CONSOLE address space (ROUTE, OPERLOG, SYSLOG). Ergo, it costs the system essentially nothing. Scott Fagen z/OS Core Technology Design IBM Poughkeepsie -- 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
Re: sysprog demand
Search on Z/OS or ZOS or OS390 or OS/390 on the site www.monster.com there is over 400 jobs, But if 500 are looking for jobs 100 have not worked for over 1 year, SPs are forced into retirement at 50, then that's not much of a demand. I should have used the term 'shortage' not demand. hire people from other countries. It happens in Poland. If 1 SP was hired from outside 3 years ago no jobs out there for over 6 months, then there is no 'shortage'. In mid 80s, one site in OZ hired 8 M/F people from South Africa paid for relocation/visa/etc, also one could find a job in 3 months then, because there was a shortage then. Based on this, I'd say there isn't much demand in Australia, US, west-EU for sysprogs. Or you were not looking to much. When the agencies say they only hire people with EU passport; or in case of Swiss, it takes 2 months to get a visa but client wants someone now, to me this means 'no shortage'. Regards, Rez Got a little couch potato? Check out fun summer activities for kids. http://search.yahoo.com/search?fr=oni_on_mailp=summer+activities+for+kidscs=bz -- 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
Fwd: Security on DMLO on IDMS DB
Hello all, I wanted to know if we can put security over IDMS DB when accessing via DMLO ? If yes, then can it be like on selective records, just read only etc...I am from App Programming side, but, I can check up with my DBA. But, before that want to do my homework. Thanks, Parin -- 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
The way forward - was: sysprog demand [SEC=UNCLASSIFIED]
Hello Rez, sarcsasm BUT NOT TOWARDS YOU There is a HUGE shortage of individuals who know absolutely everything about mainframes, comms, Windows, SAN, networking, security, disaster recovery, storage management, development, contract management, hiring and firing, purchasing of off-the-shelf software, project management and budget control, who are also young, photogenic and work 13 hours a day just for fun and who never disappoint management by making the mistake of thinking they are management's equals. AND who are willing to do it all for $5,000 per year. /sarcsasm BUT NOT TOWARDS YOU Just curious, are you in fact writing a paper on market demand for sysprogs? Or just looking for your next job? If the latter, you only need one job, not a statistical survey. If you already have one, work hard to be the best sysprog they ever had. The people on this list will help you when you need it. If you don't have a job, or you want to change, your time will be better spent checking out Monster.com as suggested by a poster, and exploring the opportunities in your local area, than by trying to figure out which way the wind is blowing by sticking your finger in the air and wondering about market demographics all over the world. (I humbly submit that it's blowing from India) Focus, focus! and good luck Jim (apologies for the legalese that gets appended to my post) IMPORTANT The information transmitted is for the use of the intended recipient only and may contain confidential and/or legally privileged material. Any review, re-transmission, disclosure dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited and may result in severe penalties. If you have received this e-mail in error please notify the Privacy Hotline of the Australian Taxation Office, telephone 13 28 69 and delete all copies of this transmission together with any attachments. -- 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
Re: KEY8 CSA: Pro/JCL and Info/XE
Peter Relson wrote: Dreaming, I'm afraid, Ed. If storage protect override exists on the machine, the PKM will start as tcbkey+key9 and will be maintained that way. If id does not exist, it would start as just tcbkey and stay that way. I searched the archives to see if this had been discussed previously. Amazingly, I found this Jan 2002 post from Chris Craddock http://bama.ua.edu/cgi-bin/wa?A2=ind0201L=ibm-mainP=R109234I=1 in which he wrote: BTW: little known fact, if you have an abend in a key 8 task and your ESTAE recovers, you will find you have been gifted with a key 9 bit in your PKM by RTM. Don't see any particular use for that, but I bet CICS finds it handy. I guess Chris and I both had the same dream. Weird! Double weird! I could -swear- there were words to that effect in the Providing Recovery topic in the Assembler Services Guide, but a quick scan of the newest and oldest (z/OS 1.1) versions of those books online comes up dry on that account. Unfortunately I just threw out my old hardcopy versions from the MVS days so I have no way to disprove it. It may be the case that I'm just having a senior moment, but I would also -swear- I used to see lots of X'0080' PKMs in SVC dumps. A PKM with both key 8 and 9 would have shown up as X'00C0'. Color me astonished. CC -- 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
Re: KEY8 CSA: Pro/JCL and Info/XE
-Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Craddock, Chris Sent: Sunday, July 29, 2007 8:17 PM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: KEY8 CSA: Pro/JCL and Info/XE /snip/ It may be the case that I'm just having a senior moment, but I would also -swear- I used to see lots of X'0080' PKMs in SVC dumps. A PKM with both key 8 and 9 would have shown up as X'00C0'. Color me astonished. CC Just write a simple batch job-step program. The first thing it does is BAKR to save current status. Then use ESTA to extract the PKM. The print it or use it as a R15 return code. If you step it with a debugger, you (i.e., the debugger) may change the environment. So, try to run it straight thru without any peeking/poking around. Let us know what you find. Jeffrey D. Smith Principal Product Architect Farsight Systems Corporation 700 KEN PRATT BLVD. #204-159 LONGMONT, CO 80501-6452 303-774-9381 direct 303-484-6170 FAX http://www.farsight-systems.com/ -- 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
Re: How to extend addressability over 4095 with USING statements
On Tue, 24 Jul 2007 08:57:58 -0500, McKown, John wrote: Either use multiple base registers, or use the long displacement type instructions Another possibility is to use a relative addressing instruction, if one exists. The long-displacement instructions _are_ relative instructions. I forget exactly when they were introduced, but they are not defined in ESA, nor were they in the original z/Architecture machines. -- Tom Marchant -- 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
Re: System automation subplexing
On Sat, 28 Jul 2007 21:18:53 -0500, W. Kevin Kelley [EMAIL PROTECTED] wrote: ... Life would be a lot simpler if products running on z/OS all issued messages through the operating system message service, but many -- especially NetView (and exploited by the applications riding on top of NetView) -- have their own, subject to their own rules, as you have discovered. ... I guess there is more than one opinion on this topic. When the messages in question have a very limited interested audience, it makes sense to keep them out of SYSLOG and off of consoles. Having messaging functions within a product like NetView makes good sense to me - especially when it is being used as a programmed operator for VTAM. (Keeping the flood of VTAM messages off of consoles helps computer operators if they are not also network operators.) However, keeping operation messages from operators makes no sense at all, and the assumption that computer operators are going to be logged onto the Automated Operations system (whether NetView-based or not) is just not realistic. Notify operators have been in NetView for a very long time, so I suspect you will have very little chance of changing their behavior. ... ... Actually, I don't think the concept of Notify operators belongs to NetView at all. I think it came from AON and SA (or the old ANO and ACO products, or maybe the even older freeby automation samples). It's not really NetView's fault that these add-ons make poor use of NetView's facilities. Pat O'Keefe -- 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
Re: some basic questions about Z system, Zlinux....
Legolas Wood writes: Zlinux : A linux which is compiled for Z Architecture, whether 31 bit or 64 bit. like Slack, Suse or centOS No, Slackware, Novell SuSE, and CentOS are Linux distributions. All three of those distributions are available for System z. The preferred generic term for Linux running on these systems is Linux on System z. System Z: An specific operating system made by IBM for its architecture, what is its differences with the Zlinux? System z refers to the whole family of modern IBM mainframes. It's a brand for this type of business server. The latest models are System z9, and there are two: System z9 Enterprise Class (System z9 EC) and System z9 Business Class (System z9 BC). You will sometimes see IBM model numbers listed. The z9 EC is 2094-xxx and the z9 BC is 2096-xxx. The xxx part refers to the submodel code. The submodel code can be a specific hardware configuration or processor capacity setting. For example, a 2094-S18 is a System z9 Enterprise Class which contains two processor books. However, you can also configure a 2094-S18 to run as any of several software capacity settings, e.g. 2094-401. A 2094-401 is a System z9 EC running at the lowest capacity setting (a single general purpose processor running at the lowest speed). Software capacity settings relate to most, but not all, of the System z's five operating systems. Current Z System version is 1.8 and Z/OS is old name of this operating system. z/OS is the current name for one of the five IBM supported operating systems for the System z mainframes -- it's the flagship operating system, in fact. The other OSes are z/VM, z/VSE, z/TPF, and, as mentioned, Linux. Z/ VM: A virtual machine like Virtual PC, that can be installed into Z System and then we can install guest OSs ( What kind of OS can be quest, does an ordinary linux can be quest or we will need specific linux versions, can we install windows?) current Z/ VM version is 5 Pretty close, although as another person pointed out z/VM started many, many years ago -- before I was born -- and has enjoyed constant refinement ever since. So it is much more sophisticated than relative newcomers like Virtual PC. Any (or all) of the five operating systems can be z/VM guests, including z/VM itself. Yes, z/VM is both an operating system and a hypervisor (virtual machine host). The traditional operating system part of z/VM is known as CMS. Yes, you can run z/VM inside z/VM, many instances deep if you wish. Linux is one of the most popular guests to run inside z/VM, and, although it is not strictly required to run Linux on System z, there are many advantages to running Linux that way so most people do. S390 : It is name of hardware, and these hardware can have a Z system installed on it. S390, or System/390, is the old name for IBM mainframes back before they supported 64-bit memory addressing. You will still see that name from time to time. For example, if you look at the Linux source code at kernel.org you will see references to s390 and s390x. The s390 parts of the source code refer to 31-bit Linux, and the s390x source code tree refers to 64-bit (known as z/Architecture). Is there any book which could give me overall knowledge about these OSs and names and what they generally do? Yes, there are many places you can look. A good place to start is here: http://www.ibm.com/university/systemz Look for some videos on the right side of the page that you can watch. They contain some basic introductory information to get you started. If you want to learn more about the inside of z/OS and how it works, you can start here: http://www.redbooks.ibm.com/abstracts/sg246981.html There's also a very good set of IBM publications for z/OS basic skills. Visit here: http://publib.boulder.ibm.com/infocenter/zoslnctr/v1r7/index.jsp?topic=/com.ibm.zconcepts.doc/zconcepts_8.html to learn about What is a mainframe? Then, after reading that section, click on Home to go to the top level table of contents. For more information about Linux on System z you can start here: http://www.ibm.com/systems/z/os/linux Click on the Library link for books, answers to frequently asked questions, etc. Enjoy, and welcome. - - - - - Timothy Sipples IBM Consulting Enterprise Software Architect Specializing in Software Architectures Related to System z Based in Tokyo, Serving IBM Japan and IBM Asia-Pacific E-Mail: [EMAIL PROTECTED] -- 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
Re: Usage of KB and KiB
On Sun, 29 Jul 2007 17:43:03 -0500, Tom Marchant wrote: On Sun, 29 Jul 2007 16:44:50 -0400, John S. Giltner, Jr. wrote: About the only thing that is constant is that memory is base on 1024. And, in fact, I do know of an exception. The model numbers of the Atari 68000-based computers were derived from the amount of memory that they had. For example, the 520ST had 512 KiB of memory. Not to mention the 1401 ... -- gil -- 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
Re: How to extend addressability over 4095 with USING statements
Tom Marchant wrote: On Tue, 24 Jul 2007 08:57:58 -0500, McKown, John wrote: Either use multiple base registers, or use the long displacement type instructions Another possibility is to use a relative addressing instruction, if one exists. The long-displacement instructions _are_ relative instructions. I forget exactly when they were introduced, but they are not defined in ESA, nor were they in the original z/Architecture machines. Actually, they are two completely different things. The relative long instructions (e.g., BRASL) were introduced with the first z/Architecture machines. They specify a 32-bit, signed immediate value designating a branch target address relative to the current PSW. Instructions with long displacements (e.g., LAY) were introduced with z990 but retrofitted to older zSeries machines via millicode. They specify a 20-bit signed displacement added to a base register to form an operand address. Allows for some mighty big control blocks. -- Edward E Jaffe Phoenix Software International, Inc 5200 W Century Blvd, Suite 800 Los Angeles, CA 90045 310-338-0400 x318 [EMAIL PROTECTED] http://www.phoenixsoftware.com/ -- 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
