http://www.research.ibm.com/journal/rd48-34.html
During the development of the z990 cpu PL8 was ported to GCC. See the
article "The GNU 64-bit PL8 compiler: Toward an open standard
environment for firmware development."
Ray Mullins wrote:
<delurk>
PL/X? True, but I personally think that is not the primary reason.
Parts of z/VSE are in PL/X, but you can get the source. You just can't do
anything with it. :-)
For a while, PL/X was offered to ISV's at a price. I don't know if anyone
ever took them up on it, though (maybe one or two).
IBM might still be a little gun-shy about releasing source (think Hitachi
and Fujitsu). And I've heard rumors that Fujitsu-Siemens' (née
Siemens-Nixdorf, née Siemens, née...) VM2000 hypervisor was based on the
last public domain version of VM/370 (although made 31-bit friendly).
Later,
Ray
--
M. Ray Mullins
Roseville, CA, USA
http://www.catherdersoftware.com/
http://www.mrmullins.big-bear-city.ca.us/
http://www.the-bus-stops-here.org/
-----Original Message-----
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On
Behalf Of Rob van der Heij
Sent: Wednesday September 14 2005 13:16
On 9/13/05, McKown, John <[EMAIL PROTECTED]> wrote:
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.
Not sure whether this applies to z/OS as well, but a popular
reason for not providing the source code can also be (3) the
code is written in a language for which IBM does not want to
ship a compiler.
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