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implementation, and a copy of the
Macintosh Toolbox as an Open Firmware device. These machines are set to boot from this device by default, thus starting the normal Macintosh startup procedure. This can be changed, just as on New World ROM Macs, but with limitations placed on what devices and formats
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On all Old World ROM machines, once
Toolbox is loaded, the boot procedure is the same. Toolbox executes a memory test, enumerates Mac OS devices it knows about (this varies from model to model), and either starts the on-board video (if present) or the option ROM on a NuBus or PCI video card. Toolbox
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turned off. PCI Power Macs can be configured to boot into Open
Firmware, allowing the firmware to load a boot loader directly, or they can use a specially-prepared floppy disk to trick the Toolbox into loading a kernel (this is used for
245:; this emulator is then used to boot the predominantly 68k-based Toolbox, and is also used to support applications written for the 68k processor. Once Toolbox is running, PPC machines can boot into Mac OS directly.
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machines. In particular, the Beige Power Mac G3 and all other beige and platinum-colored Power Macs are Old World ROM machines. In common use, the "Old World" designation usually applies to the early generations of
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depicting a floppy disk with a blinking question mark in the middle will be displayed. If a hardware problem occurs during the early part of the boot process, the machine will display the
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then checks for a disk in the floppy drive, and scans all SCSI buses for a disk with a valid System Folder, giving preference to whatever disk is set as the startup disk in the
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The simplest way to identify an Old World ROM Mac is that it will not have a factory built-in USB port. Only New World ROM Macs featured a USB port as factory equipment.
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Showing all three icons of the OldWorld ROM (from left to right: Missing OS, Happy Mac (Found OS), and Sad Mac (Macintosh 128k/Plus) logos)
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icon with a hexadecimal error code and freeze; on Macs made after 1987, this will be accompanied by the
148:(ROM) chip, usually in a socket (but soldered to the motherboard in some models). All Macs prior to the
210:, and these Open Firmware revisions have several bugs which must be worked around by boot loaders or
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use Old World ROM, while said models, as well as all subsequent models until the introduction of the
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logo is displayed, and control is handed over to the Mac OS. If no disk to boot from is present, an
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Since the Old World ROM usually boots to
Toolbox, most OSs have to be installed using a
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patches. The Open
Firmware environment can be entered by holding the key combination
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is commonly used for Linux installations). 68K-based Macs and NuBus Power Macs
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can be used; on these machines, particularly the early machines like the
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197:PCI Power Macs with an Old World ROM contain an
287:have Mac OS installed to load another OS (even
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8:
291:, which was an Apple product), usually with
50:. Unsourced material may be challenged and
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114:Learn how and when to remove this message
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332:Macintosh: ROM Size for Various Models
162:Bronze Keyboard (Lombard) PowerBook G3
185:-equipped models), but not the older
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48:adding citations to reliable sources
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256:If a bootable disk is found, the
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542:Macintosh Programmer's Workshop
1:
338: (archived June 21, 2002)
300:installation floppy images).
775:Macintosh operating systems
158:Blue and White Power Mac G3
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181:(and sometimes the first
663:Multiprocessing Services
623:Hierarchical File System
141:(Mac) models that use a
168:-based EFI Models, are
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643:Macintosh File System
129:
279:from inside Mac OS (
204:Power Macintosh 9500
44:improve this article
461:Graphing Calculator
780:Macintosh firmware
568:Appearance Manager
511:System Information
392:System 2, 3, and 4
319:Quik (boot loader)
137:computers are the
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739:Memory management
648:Macintosh Toolbox
143:Macintosh Toolbox
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732:Related articles
703:Startup sequence
481:QuickTime Player
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146:read-only memory
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593:Command key (⌘)
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501:Software Update
486:Network Browser
466:Keychain Access
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336:Wayback Machine
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270:Chimes of Death
233:All Power Macs
230:while booting.
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63:"Old World ROM"
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326:External links
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293:virtual memory
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187:Motorola 68000
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749:New World ROM
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708:System folder
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603:Control Strip
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598:Control Panel
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313:BootX (Linux)
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241:CPU inside a
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199:Open Firmware
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170:New World ROM
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135:Old World ROM
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65: –
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60:
59:Find sources:
53:
49:
45:
39:
38:
34:
29:This article
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23:
18:
17:
743:
698:Sosumi sound
608:Creator code
583:Balloon help
431:Applications
302:
284:
274:
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232:
196:
134:
133:
110:
101:
91:
84:
77:
70:
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42:Please help
30:
723:WorldScript
658:MultiFinder
447:Drive Setup
277:boot loader
208:Toolbox ROM
769:Categories
618:Extensions
588:Bomb error
573:Apple menu
556:Technology
516:SimpleText
451:DVD Player
438:Calculator
243:nanokernel
179:Power Macs
74:newspapers
718:Type code
688:QuickTime
683:QuickDraw
532:HyperCard
525:Developer
491:Scrapbook
476:PowerTalk
258:Happy Mac
139:Macintosh
31:does not
754:Software
653:Managers
633:Keychain
628:HFS Plus
506:Stickies
496:Sherlock
422:Mac OS 9
417:Mac OS 8
411:Mac OS 7
407:System 7
402:System 6
397:System 5
387:System 1
380:Versions
307:See also
220:⌥ Option
160:and the
104:May 2014
578:At Ease
547:ResEdit
537:MacsBug
443:Chooser
334:at the
272:sound.
266:Sad Mac
239:68LC040
235:emulate
212:nvramrc
193:Details
88:scholar
52:removed
37:sources
673:OSType
638:Labels
613:Dogcow
456:Finder
156:, the
152:, the
90:
83:
76:
69:
61:
563:Alias
298:Linux
281:BootX
216:⌘ Cmd
183:NuBus
166:Intel
154:iBook
95:JSTOR
81:books
678:PICT
289:A/UX
285:must
262:icon
150:iMac
67:news
35:any
33:cite
175:PCI
46:by
771::
253:.
237:a
365:e
358:t
351:v
228:F
226:+
224:O
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218:+
117:)
111:(
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102:(
92:·
85:·
78:·
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54:.
40:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
