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.

2017年6月30日 · In the early 1980s, Acorn Computers was a small company with a big product. The firm, based in Cambridge, England, had sold over 1.5 million 8-bit BBC Micro desktop computers as part of the BBC’s national Computer Literacy …

2020年4月27日 · It's been 35 years since the first Arm processor was powered up. "At 1pm on April 26th 1985," recalled Prof Steve Furber, "the first ARM microprocessors arrived back from the manufacturer – VTI [VLSI Technology, Inc].

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.

The ARM1, Z-80 and 6502 use very different techniques for sequencing instructions. The ARM1 can use a simple, highly structured sequence controller because of its simple RISC instruction set. The 6502 and Z-80 are implemented with a PLA in combination with hard-wired "random" logic.

The ARM1 chip is the ancestor of the extremely popular ARM processors used in most smart phones. The ARM1 is a good choice for reverse engineering since it was designed in 1985 and its simple RISC silicon circuits are easier to understand than modern processors.

2013年9月11日 · Arm processor families group multiple processors, and were named chronologically, starting with Arm1 (1985) up to Arm11 (2002). The naming scheme then changed with the Cortex family introduced in 2005, in which processors are named following the scheme Cortex-{letter}{number}.

2016年1月4日 · 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.

2017年3月14日 · How can you count bits in hardware? In this article, I reverse-engineer the circuit used by the ARM1 processor to count the number of set bits in a 16-bit field, showing how individual transistors form multiplexers, which are combined into …

Reverse engineering the ARM1, ancestor of the iPhone’s processor (righto.com) Almost every smartphone uses a processor based on the ARM1 chip created in 1985. The Visual ARM1 simulator shows what happens inside the ARM1 chip as …