A History of The ARM Microprocessor | Dave Jaggar | Talks at Google
Why Hacker News recommends it
HN cites it for first-hand ARM history, including Thumb's origin, and for Jaggar's endorsement of RISC-V.
What it is
Dave Jaggar, who defined much of the ARM architecture, recounts how Acorn's near-extinction led to ARM, including the history of Thumb, StrongARM, and the Austin team.
Recommended by 1 HN commenters across 1 different months, 2020 to 2022.
What Hacker News said
Recommends klelatti · 2020-06 · on “Was Acorn's RISC OS an under-appreciated pearl of OS design?”
Agreed plus Thumb which got ARM into Nokia mobile phones. Dave Jaggar has some interesting comments on the history around DEC, StrongARM and the Austin ARM team. [this video]
Cites klelatti · 2020-06 · on “Was Acorn's RISC OS an under-appreciated pearl of OS design?”
Surprising but true! Dave Jaggar makes it clear in this video that it was to keep code within smaller Nintendo ROM size constraints. Seven year gap between ARM / Nintendo discussions and GBA appearance! [this video]
Cites brucehoult · 2020-11 · on “ESP32-C3 WiFi and BLE RISC-V processor is pin-to-pin compatible with ESP8266”
That's one opinion. Another ARM engineer who contributed one heck of a lot more to ARM's success (designed ARM7TDMI, Thumb, Thumb2) says RISC-V is great. See at 51 minutes in this [this video]
Cites brucehoult · 2020-12 · on “Apple M1 foreshadows Rise of RISC-V”
Who says RISC-V is mediocre? Here's the opinion of probably THE most important ARM engineer of the 1990s and 2000s, Dave Jaggar who developed the ARM7TDMI, Thumb, Thumb2. [this video] Check at 51:30 where he says "Are there any ARM snipers? No .. I would Google RISC-V and find out all about it. They've done a fine instruction set, a fine job [...] it's the state of the art now for 32-bit general purpose instruction sets. And it's got the 16-bit compressed stuff. So, yeah, learning about that, you're learning from the best."
Cites brucehoult · 2021-01 · on “Show HN: v8-riscv — Port of JavaScript V8 engine to RISC-V”
That's the opinion of one ARM engineer I've never heard of. Here's the opinion of probably THE most important ARM engineer of the 1990s and 2000s, Dave Jaggar who developed the ARM7TDMI, Thumb, Thumb2. [this video] Check at 51:30 where he says "Are there any ARM snipers? No ... I would Google RISC-V and find out all about it. They've done a fine instruction set, a fine job [...] it's the state of the art now for 32-bit general purpose instruction sets. And it's got the 16-bit compressed stuff. So, yeah, learning about that, you're learning from the best."
Cites brucehoult · 2021-02 · on “RISC-V isn't as interesting as you think”
There's really a lot of severely misinformed opinion there. "Much of the hype of RISC-V is hoping for laptop/desktop/server class silicon." Really? RISC-V is pitched mostly against the likes of ARM, which seems to be doing fine without laptop/desktop/server class silicon. Several RISC-V vendors are already shipping Cortex A53/A55 class CPUs, which are used as the LITTLE cores in mobile devices -- and even still the main cores in lower end mobile. Several RISC-V vendors have formally announced A72 (SiFive U84) or A73 (Alibaba C910) class cores. Alibaba is apparently using these internally already, and boards for general sale are expected this year. SiFive's U84 will probably be shipping in ar
Cites seedless-sensat · 2021-02 · on “RISC-V isn’t as interesting as you think”
> RISC-V seems like it hasn’t learned anything from CPUs designed after 1991. Never mind what RISC-V says about itself. Here is Dave Jaggar, a key ARM architect, endorsing RISC-V as state of the art in 2019: [this video] .
Cites brucehoult · 2021-02 · on “RISC-V isn’t as interesting as you think”
There's really a lot of severely misinformed opinion there. "Much of the hype of RISC-V is hoping for laptop/desktop/server class silicon." Really? RISC-V is pitched mostly against the likes of ARM, which seems to be doing fine without laptop/desktop/server class silicon. Several RISC-V vendors are already shipping Cortex A53/A55 class CPUs, which are used as the LITTLE cores in mobile devices -- and even still the main cores in lower end mobile. Several RISC-V vendors have formally announced A72 (SiFive U84) or A73 (Alibaba C910) class cores. Alibaba is apparently using these internally already, and boards for general sale are expected this year. SiFive's U84 will probably be shipping in ar