The GE (greater than or equal) condition is more complex, requiring flags "N set and V set, or N clear and V clear". The next two gates compute this value. (Due to the way CMOS gates are constructed, an OR-NAND gate is constructed as a single gate.)

2015年11月28日 · Pics Chip geeks have produced an interactive blueprint of the ARM1 – the granddaddy of the processor cores powering billions of gadgets today, from Apple iPhones to Raspberry Pis, cameras, routers and Android tablets.

2022年11月13日 · 1985年，Roger Wilson和Steve Furber设计了他们自己的第一代32位、6MHz的处理器，用它做出了一台RISC指令集的计算机，简称 ARM （Acorn RISC Machine）。 这就是第一代ARM处理器 ARM1。 随后，改良版的ARM2也被研发出来。 ARM2被用在BBC Archimedes 305上。 后来 Acorn 被 Olivetti 收购，在 Andy Hopper 的提一下，1990年11月27日，Advanced RISC Machines Ltd.（简称 ARM）被分拆出来，正式成为一家独立的处理器公司。 由苹果公司 …

The Visual ARM1 simulator shows what happens inside the ARM1 chip as it runs; the result (below) is fascinating but mysterious. In this article, I reverse engineer key parts of the chip and explain how they work, bridging the gap between the puzzling flashing lines in the simulator and what the chip is actually doing.

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arm1使用简单的指令集，使得设计更简洁，功耗更低。 虽然ARM1并未大规模应用，但它验证了RISC架构在低功耗和高效能方面的潜力。 用于 BBC Micro 的 ARM1 处理器

2016年2月9日 · The ARM1, designed in 1985 by Acorn engineers, was a prototype 32-bit RISC CPU with 25,000 transistors. The ARM architecture has undergone many, many revisions since then, yet if you're au fait with today's ARM A32 instruction …

2016年2月9日 · Ever since the silicon blueprints of the ARM1 – the grandfather of today's smartphone processors – were recovered in November, hardware guru Ken Shirriff has been poring over the layout and reverse-engineering the landmark chip. The ARM1, designed in 1985 by Acorn engineers, was a prototype 32-bit RISC CPU with 25,000 …

arm1 这是第一个 arm处理器 ，功能上与arm2非常接近。该处理器已用于bbc和pc机器的一些评估系统中，但主要是原型芯片，已被arm2取代。arm2和arm1之间的确切，主要差异是： fiq模式下没有倾斜的r8和r9。 没有乘法指令。 ldr / str指令具有寄存器指定的移位量。

2020年4月8日 · GE是指令条件，意思就是greater or equal，大于或等于，似乎几乎zd可以加到所有指令上。 BGE中的B是回branch，跳转的意思，BGE就是大答于或等于才跳。 BEQ