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The operating system now needs to natively support the 64-bit z/Architecture, but application compatibility still goes all the way back to System/360.
by wtallis 5y ago
The operating system now needs to natively support the 64-bit z/Architecture, but application compatibility still goes all the way back to System/360.
- p_l 5y agoHuge chunk of the OS is still 24bit code, then 31bit, little 64bit. The removal of backwards compatibility meant you couldn't setup LPAR or VM with 31bit OS anymore