Nevertheless, we dug up an old copy of MacDraw Pro, and were quite impressed with the results. When Speed Doubler was first released a few years ago, this was a very important feature, as there were still many popular applications which were not PowerPC native nowadays, not many people use non-native software. >On systems with PowerPC processors, Speed Doubler provides faster 68k emulation. The PowerPC instruction set is ideal for emulating other instruction sets, since has byte swap instructions, and the delightful rlwinm instruction, and you could shift and mask for free with many instructions, which is great for decoding opcodes.Īnybody remember Connectix SpeedDoubler for PowerPC Macs? MacOS could emulate old 68K apps correctly but slowly, but Connectix SpeedDoubler recompiled 68K to PPC instructions on the fly! And it flew!Īt Interval we were running 68k Mac Common Lisp with Connectix Speed Double on PowerPC Macs, and it would compile huge piles of Lisp code into 68k instructions, then when you ran it, Connectix Speed Doubler would compile that into PPC instructions to execute, and it actually worked quite well!
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