This group is for all folks running the original IBM VM/370 Release 6 operating system (or later (e.g. VMTCE (Community Edition)) on Hercules. Like the other early IBM operating systems this version has always been in the public domain and so can be freely distributed. The base version as supplied by IBM is lacking in many facilities. IBM solved this by providing additional extension products which were licensed and so are not available. There are however many user enhancements available which can be installed. In addition, in order to get users up and running quickly updated "releases" of VM/370 included the most popular updates are available for download, so novices can start to learn VM without having to delve into the system internals. It is intended that this wiki will provide information on the base release and these updates.
The available versions are here :-
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Re: memset help
<keanu> Whoa. </keanu> I sure wouldn't have wanted to be you in high school, Steve. ;) -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Dave McGuire
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#1030
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Re: memset help
Oh dear. I have had the problem in the past of my e-mails being picked up by spam filters and so has my brother. I think in our case it was a case of the Scunthorpe problem
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Steven Fosdick
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#1029
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Re: Register Add - Quick Question
Peter ... You have taught me what F meant!
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adriansutherland67
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#1028
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Re: Register Add - Quick Question
You are gentlemen ... thank you! It is for a 24 bit address. A
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adriansutherland67
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#1027
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Re: Register Add - Quick Question
This form of LA: LA Rx,D2(Rx) is only good to add up to 4095 to a register. Past that you have to use other instructions. And as Peter noted, the left 8 bits will be zeroed in AM24. Joe wrote:
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Joe Monk
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#1026
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Re: Register Add - Quick Question
Mostly! LA works as long as the answer fits in 24 bits so it's no good for adding 8 to a negative value in R1 for example. An alternative solution is: A R1,=F'8' If memory is really tight, you could
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Peter Coghlan
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#1025
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Re: Register Add - Quick Question
Yes! LA R1,8(R1) Joe adrian@...> wrote:
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Joe Monk
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#1024
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Register Add - Quick Question
Is there a better way than this to add 8 to R1? LA? ? R0,8 AR? ? R1,R0? ? ? ? ? Add 8 to R1 Thanks A
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adriansutherland67
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#1023
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Re: memset help
Slowly learning - I think I can do USING and DROP and use MACROs as well ... includes/copybooks A
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adriansutherland67
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#1022
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Re: memset help
Exactly - however we don't really care about the backend optimisations (after all we use Hercules which has completely different timing characteristics), but we do the front end / C ones; for example
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adriansutherland67
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#1021
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Re: memset help
I recovered it ... the real issue is that it was work in progress A
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adriansutherland67
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#1020
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Re: memset help
Perhaps ... and 16mb is not very very tiny ... I think it is the optimisers that will cause dramas!
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adriansutherland67
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#1019
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Re: memset help
I believe that it it did "self host" at least once. And why would we not try again? Pragmatically however there?is no particular problem with cross compiling it (and I am guessing this might be
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adriansutherland67
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#1018
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Re: memset help
Joe, I wonder if we could split the pre-processor into a separate phase. Pretty sure GCC used to build like that on my Atari ST with 4Mb of memory Dave Sent: 16 April 2020 17:45 To: [email protected]
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Dave Wade
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#1017
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Re: memset help
"There have been a lot of angst about 31-bit addressing in MVS 3.8J. This was implemented in a forked version of Hercules. It was driven by the fact that GCC could not compile itself in a 24-bit world
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Joe Monk
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#1016
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Re: memset help
Source availability was never the issue. ?The ability for GCC to actually build itself on the various target platforms have been the issue. There have been a lot of angst about 31-bit addressing in
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Harold Grovesteen
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#1015
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Re: memset help
Folks, Not sure if its what I actually said, but in essence, there should be no problems re-building GCC, its just I havn¡¯t done it for some time. There are issues withy disk usage on the GCCCMS ID.
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Dave Wade
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#1014
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Re: memset help
On Wed, 2020-04-15 at 18:15 -0500, Joe Monk wrote: > Question: > ¨C?What should be used to move or clear large blocks of data? > ¡ì?Answer: > ¡ì?There are several ways to move or clear a large
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Harold Grovesteen
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#1013
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Re: memset help
I think not ... the source is all published. One thing I want to do is a build of GCC using the GCCLIB library A
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adriansutherland67
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#1012
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Re: memset help
So are all of the operating systems dependent upon Paul for a rebuild of GCC?? In this context I am assuming he is delivering object modules to the other platforms with linking occurring on the target
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Harold Grovesteen
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#1011
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