Originally Posted by wizard69
Rosetta only worked on i86 because PPC was such a terrible professor. I said so in the forums years ago and people ignored me.
Um, that's because it isn't true. The PowerPC is a very powerful and capable processor. When the G3 was released, there was nothing on the market at affordable prices that could beat it on integer performance. The G4 repeated that trick, but on floating point.
The fact I'd PPC processors had terrible integer performance while intel was many times better. This additional integer capacity allowed for impressive emulation of PPC code.
By the time Apple switched to Intel, the PPC had lagged considerably, although the G5 beat the Intels on PPC code for some time (just like the fasted 68040 Macs beat the earliest PowerMacs on 68K code).
Originally Posted by c-ray
BTW, this article finally adds color to where/when Apple soured on PPC. Up until now, most people thought it happened after the NeXT acquisition. Now that we see it goes back much farther, then it appears to be a matter of timing. The promised G5 at 3 Ghz, which IBM missed the deadline on, was probably the tipping point that pushed the decision over the edge.
Don't be too quick to assume it was all down to Apple deciding to leave the PPC platform all by themselves. The PowerPC was once destined for a great future in the workstation market, the Mac being only a piece of the pie. By the time the G5 came around, Apple was the only workstation client left for the PPC suppliers (IBM and Motorola). Add to that that Apple has been named by IBM as a particularly erratic customer, due to their trademark secretive manner of doing business: letting no-one in on their plans, then suddenly demanding huge shipments of processors for new machines that need to be brought to market in extremely short time frames. As a supplier, such a customer is a nightmare, especially if it is pretty much the only customer for a product. IBM simply got tired of that game and started to concentrate more on other markets and customers. Apple had little choice but to look elsewhere for their processor options.