The article states that "Basilisk II mostly emulates a Macintosh Quadra 900 (circa 1991)". This is not quite correct. Basilisk is not a pure hardware emulator, instead it patches the OS code in ROM and some resources (which can contain code in classic MacOS) in order to avoid implementing perfect hardware emulation. I guess this also speeds up the system somewhat.
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Nicely written article, however, there's a catch.
The article states that "Basilisk II mostly emulates a Macintosh Quadra 900 (circa 1991)". This is not quite correct. Basilisk is not a pure hardware emulator, instead it patches the OS code in ROM and some resources (which can contain code in classic MacOS) in order to avoid implementing perfect hardware emulation. I guess this also speeds up the system somewhat.
See section 6.2 in https://basilisk.cebix.net/TECH for details - the related source files are https://github.com/cebix/macemu/blob/master/BasiliskII/src/r... https://github.com/cebix/macemu/blob/master/BasiliskII/src/r...