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don’t forget arm26
by s-wilson-x10-6 4y ago
don’t forget arm26
- userbinator 4y agoDo you mean ARM926? That was a very common core in dumbphones.
- timthorn 4y agoI don't think arm26 was a typo: https://en.m.wikipedia.org/wiki/26-bit_computing https://en.m.wikipedia.org/wiki/26-bit_computing Check the parent's username.
- peterfirefly 4y agoAlmost certainly not. https://en.wikichip.org/wiki/arm/26-bit_architectures https://en.wikichip.org/wiki/arm/26-bit_architectures https://en.wikipedia.org/wiki/26-bit_computing https://en.wikipedia.org/wiki/26-bit_computing Flags, processor mode, and the PC (24-bit) were kept in the same 32-bit word. That made it cheaper to store/restore on interrupt and, boy, did they want interrupt handling to be fast! Combined with the requirement for naturally aligned instructions, this gives the original ARM a 26-bit address space for code. They chose to make that the address space for everything -- so the address space was 64MB. The ARM926 came much later.
- peterfirefly 4y agoIf you are Sophie, I'd just like to say thanks.
- mrlonglong 4y agoYes indeed the entire world relies on ARM products ! Britain found a better way to conquer the world TIL ...
- klelatti 4y agoJust to add my thanks too. I saw Steve Furber do a presentation about the first ARM CPU in 1986, never thought I’d be typing this on an Arm powered device 37 years later.