On Jun 4, 2017, at 11:40 AM, Michael <macallan%netbsd.org@localhost> wrote: > > Hello, > > On Sun, 04 Jun 2017 17:12:24 +0200 (CEST) > Havard Eidnes <he%NetBSD.org@localhost> wrote: > >> Just to be clear on the nomenclature: "old world", that's OF<3 >> while "new world" is OF>=3? > > Pretty much. Old World ROMs contain old style, MacOS-before-X support > routines, New World ROMs don't, and for MacOS 9 this stuff is loaded > from a file. Newer ones can't even boot MacOS 9 anymore. > It *should* coincide with OF>=3. The "official" delineation is that OldWorld machines have floppy and ADB ports and a reasonably complete Toolbox implementation in ROM, while NewWorld machines have pretty much just OpenFirmware and enough to load the Toolbox off disk. The transition point was from the PowerMac G3 (beige) to iMac; I seem to recall that Lombard was the first NewWorld PowerBook. Incidentally, NewWorld doesn't have much to do with OS X, since the transition was around the Mac OS 8.1/8.5 timeframe (the Rev A iMac came with 8.1 preinstalled for the first few months). OS X supported beige G3s, which were OldWorld. But there WAS a major OpenFirmware shift with NewWorld, as there was with the G3s (2.x came with the beige G3 though there were some 603/604 models with OF 2; 3.x came with NewWorld). As far as I know, the model/OF table on the macppc port page is accurate: https://www.netbsd.org/ports/macppc/models.html Apple's tech note on the NewWorld architecture is also pretty instructive: https://web.archive.org/web/20041011114718/http://developer.apple.com/technotes/tn/tn1167.html - Dave
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