Re: Classic (was: How viable is Cocoa development?)
Re: Classic (was: How viable is Cocoa development?)
- Subject: Re: Classic (was: How viable is Cocoa development?)
- From: Brent Gulanowski <email@hidden>
- Date: Sun, 27 Jan 2002 01:00:53 -0500
On Saturday, January 26, 2002, at 11:06 AM, Ondra Cada wrote:
Finlay,
Finlay Dobbie (FD) wrote at Sat, 26 Jan 2002 15:56:30 +0000:
FD> Emulation is taken to imply emulation of a different chip
architecture
Well, I'd argue that the overall system architecture is much more
important
than the CPU. It is quite imaginable to have multiple-CPU system with
more
_different_ chips, still running quite natively the code and even
supporting
SMP ;)
---
Classic runs in a virtual hardware space last time I checked.
Interestingly (according to my studies), Virtual PC is technically a
"simulator", since
the "hardware" is completely software. An emulator uses native processor
hardware and
some software on non-native hardware. Classic.app pretends to be a Mac,
where
most of the hardware is not the real hardware, except for the processor.
Check out
Apple System Profiler for OS 9 in Classic, very interesting. My 400MHz
G4 is running
at "about 396MHz"! The machine model is "Classic Mac OS Compatibility".
It's a virtual
machine, except the processor. It can't see the video card or the
ethernet card at all,
nor does it know which volume is the startup volume.
bg