On 12/29/2016 9:36 AM, Joseph Reichman wrote:
That's a really good question in windows there is no concept of RB each
program is a task thread
Windows -- like all operating systems -- has an RB chain equivalent.
The big difference is the S/360 hardware did not have a hardware stack
so the operating system implemented everything via software structures.
Thus, the RB chain was born. Intel and other later architectures had
hardware stacks from the beginning, so much of that context is
maintained in hardware structures.
If something like the ESA/390 linkage stack existed back in the S/360
days, there might never have been RBs.
--
Edward E Jaffe
Phoenix Software International, Inc
831 Parkview Drive North
El Segundo, CA 90245
http://www.phoenixsoftware.com/
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