At 25 (in November 2015), ARM1 became serious retro material, because, well, it became subject to a gate-level simulation by visual6502.org, and they are, of course, the authority on these matters. 
So expect what is to be expected, namely, an amazingly precise simulation, visuals included:
http://visual6502.org/sim/varm/armgl.html
However, in what only may be called a previously unheard of deviation from the usual procedures no chips were harmed in the process:
Unlike previous projects based on microscope images, the Visual ARM was created from a resurrected .cif chip layout file used under license agreement with ARM. We also photographed one of the few ARM1 chips at very high resolution. This photograph is featured at the Centre for Computing History in Cambridge, UK.