For someone who's "retired" he's certainly not slowed down much ... From the section about his talk at the symposium (there appears to be papers related to this on his personal website: http://www.inf.ethz.ch/personal/wirth/)
"It was Paul Reed, who suggested in 2010 that the book ought to be updated. After all, the processor used became extinct. I decided to take up the challenge and to design my own processor subsequently called RISC. I implemented it with a small, low-cost Spartan-3 development board, building an entire replacement for Ceres. This, however, implied the construction of a new compiler and linker, and the rewriting of the corresponding chapters of the book.
All this provided a welcome opportunity to further simplify and refine both language and system. As a consequence, all parts formerly written in obscure and unpublishable assembler code - such as garbage collector, device drivers, and display pattern generators - are now expressed in Oberon too. Also the entire hardware is displayed in full detail, expressed in the language Verilog."
I really hope I'm still able to undertake projects of that kind of ambition when I'm well into my 70's....
"It was Paul Reed, who suggested in 2010 that the book ought to be updated. After all, the processor used became extinct. I decided to take up the challenge and to design my own processor subsequently called RISC. I implemented it with a small, low-cost Spartan-3 development board, building an entire replacement for Ceres. This, however, implied the construction of a new compiler and linker, and the rewriting of the corresponding chapters of the book.
All this provided a welcome opportunity to further simplify and refine both language and system. As a consequence, all parts formerly written in obscure and unpublishable assembler code - such as garbage collector, device drivers, and display pattern generators - are now expressed in Oberon too. Also the entire hardware is displayed in full detail, expressed in the language Verilog."
I really hope I'm still able to undertake projects of that kind of ambition when I'm well into my 70's....