jerrm wrote: ↑
Tue Aug 06, 2019 10:14 pm
MisterEd wrote: ↑
Tue Aug 06, 2019 9:43 pm
BTW, Microsoft has been supporting both 32-bit and 64-bit versions of Windows for 12 years now. Of course Microsoft has plenty of resources to do this.
More like 18 years, as have virtually all linux distros.
I hate to quibble but while it was true a test version of 64-bit linux was demonstrated in 2001 it was on a simulator. The reason was there were no x86 based 64-bit CPUs at the time.
AMD introduced the first x86 based 64-bit processors the Opteron in April 2003 followed by the Athlon 64 in September 2003. Intel did not have an x86 based 64-bit processor until 2004. Since AMD was first with its AMD64 architecture Intel ended up licensing it and renaming it Intel 64.
The first 64-bit Linux distributions were released in 2003 after AMD released its 64-bit CPUs with its AMD64 architecture. People wanting to run it on an Intel CPU had to wait a year or more after that because there were no x86 based Intel 64-bit CPUs until 2004.
Microsoft followed suit in April 2005 with the release of Window XP Professional x64 which supported AMD64 and EM64T (later renamed Intel 64).
The ARMv8-A architecture was the first to support 64-bits in 2011.
The first Arm64 release of Debian was Jessie in 2015. It was followed by Stretch in 2017.
This shows that 64-bit support on ARM CPUs is still relatively recent compared to Intel and AMD CPUs.