> Unlike all of its major rivals—including the Apple II—the IBM PC was built > with an open architecture.
The Apple II, designed by Woz, is famously open, to the point the original model came with full schematics and ROM listings which made it trivially cloneable. I'm curious why this isn't considered an open architecture.
Just like posting source code does not make the code open, publishing schematics does not make the design open.
it's true that eventually Apple started suing people, but until Apple vs Franklin it was unclear if you could even copyright a BIOS. And once that was determined, people had to clean-room reverse engineer the BIOS but it was possible to make clones (see the Laser 128 and many many others)
this is just as open as the IBM PC was. You couldn't just drop a copy of the PC bios into your clone, you had to go to a 3rd-party reverse-engineered BIOS
They were actually pretty cool computers; half the price of the name brand Apple while being mostly fully compatible with all the software. I've only played with one once, but I thought it was pretty cool. Sad that VTech only makes crappy kids toys now.
The clean-room approach was a neat hack that solved the problem, but it was hard to find people that had never seen the IBM source and could prove it.
https://www.allaboutcircuits.com/news/how-compaqs-clone-comp...