The 68k->PPC transition and Snow Leopard: comparing apples to oranges
In “Snow Leopard: Party like it’s 1998″ there’s an attempt to quell the outcry of Mac users for Apple dropping PowerPC support in Snow Leopard by recalling the late Nineties transition from the Motorola 68×00 to the PPC machines.
It is a good and praiseworthy idea but unfortunately, in the description there are a couple of major inaccuracies which undermine the effort.
In the post it is stated that
On October 17, 1998 Apple released Mac OS 8.5, the first operating system that ran solely on Macintoshes with PowerPC processors. As far as system software upgrades go, this was the end of the line for any Mac built before the Power Macintosh 6100, introduced in March 1994. Earlier Macs ran on some variation of 680×0 processors and were supported mostly via emulation in a PowerPC environment. Emulation works, but it also slows things down. By 1998, Apple decided it just couldn’t support 680X0 emulation for a number of reasons, but chiefly among them was speed.
The Mac OS 8.5 was surely the end of Mac based on the 68k family of processors, but Apple kept on making and selling machines based on this hardware platform long after the release of the Power Mac 6100 in March 1994.
Macs such as the PowerBook 280 and the Quadra/LC 630 were launched during 1994 and even the following year, in the April and August of 1995 Cupertino introduced non-PowerPC models such as The Performa 580 and the PowerBook 190cs.
And those Macs were not “supported mostly via emulation in a PowerPC environment”. It was the way around: Macintoshes based on the PowerPC chips had to use emulation to be compatible with the (operating) System (which was later called Mac OS), which was still full of 68×000 code.
During the late Nineties Apple kept on slowly cleaning up the Mac OS code by “a PowerPC native, multi-threaded Finder” (does this ring a bell?) in Mac OS 8.0 and transitioning away from the old CISC CPUs by first limiting support to 68040 Macs with release 8.1.
Image taken from www.cg.tuwien.ac.at/~schaelss/vintage/index.htm
The little Quadra
The Macintosh Quadra 605 was the smallest and lowest-model from the high profile professional lineup when Apple still used 68k CPUs from Motorola.
Unlike the much bigger 700, 800 and 900 models, the 605 was offered in a horizontal slim “pizzabox” case, which closely resembled those of the LC line.
While the innards of the 605 were indeed shared with that of the Performa/LC 475 -featuring a 68040 and a floppy drive- on the other hand the design of the case was unique, a fact that many books and websites overlook, incorrectly reporting them as identical.
The design of the Quadra 605 is much rounder and stylish and looks like a slimmed down version of the Quadra/LC/Performa 630. Gone is the front hoof of the LCs and the 605 lies flat, not inclined, on the surface, sporting four cute “feet” similar to those that adorn the base of the 630, 800/840 and 7×00 models.
The 605 can be seen as the missing link between the LCs and the 630: thanks to its small width and a clean front panel without a second slot for the optical unit, it has a very appealing design, which is minimal and elegant at the same time.
Image taken from Wikipedia