[tachyonbeam]

I'm amazed at how small and (relatively) simple it all looks, that you can literally see the registers on that picture. Just 25K transistors for a whole 32-bit CPU with a 3-stage pipeline.

For those who would like a bit more detail about the feature of this CPU: http://everything2.com/title/ARM1

One thing I was curious to know is whether the ARM1 had a hardware multiply instruction, whether they could fit that in this tiny CPU. It does not.

[pja]

ARM2 had hardware multiply & more shadow registers and came in at 30k transistors according to Wikipedia. Everything2 thinks the ARM2 came in at just over 25k transistors though, with the ARM1 using less than 25k.