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Statements

Subject Item
dbr:Macintosh_Toolbox
rdfs:label
Macintosh Toolbox
rdfs:comment
The Macintosh Toolbox implements many of the high-level features of the Classic Mac OS, including a set of application programming interfaces for software development on the platform. The Toolbox consists of a number of "managers," software components such as QuickDraw, responsible for drawing onscreen graphics, and the Menu Manager, which maintain data structures describing the menu bar. As the original Macintosh was designed without virtual memory or memory protection, it was important to classify code according to when it should be loaded into memory or kept on disk, and how it should be accessed. The Toolbox consists of subroutines essential enough to be permanently kept in memory and accessible by a two-byte machine instruction; however it excludes core "kernel" functionality such as
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dbt:Classic_Mac_OS dbt:Widget_toolkits
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dbc:Classic_Mac_OS dbc:Macintosh_firmware
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n7:Macintosh_Toolbox?oldid=989633813&ns=0
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dbr:Virtual_memory dbr:Master_boot_record dbr:Classic_Mac_OS_memory_management dbr:Memory_management dbr:PowerPC dbr:Memory_protection dbr:Parameter_(computer_programming) dbr:Macintosh_startup dbr:Floating-point_unit dbr:Branch_(computer_science) dbr:Hexadecimal dbr:File_system dbr:Firmware dbr:Resource_fork dbr:BIOS dbr:Disk_partitioning dbr:List_of_macOS_components dbr:Booting dbr:Bootloader dbr:Library_(computing) dbr:Dispatch_table dbr:Instruction_set_architecture dbr:Power-on_self-test dbr:System_suitcase dbr:Motorola_68881 dbr:Carbon_(API) dbr:Interrupt dbr:Byte dbc:Macintosh_firmware dbr:Illegal_opcode dbr:Memory_address dbr:Macintosh_128K dbr:Motorola_68000_series dbr:IBM_PC_compatible dbr:Porting dbr:Interrupt_vector_table dbr:Patch_(computing) dbc:Classic_Mac_OS dbr:Mac_OS_nanokernel dbr:MacOS dbr:System_call dbr:New_World_ROM dbr:Classic_Mac_OS dbr:Boolean_data_type dbr:API dbr:QuickDraw dbr:Open_Firmware
dbo:abstract
The Macintosh Toolbox implements many of the high-level features of the Classic Mac OS, including a set of application programming interfaces for software development on the platform. The Toolbox consists of a number of "managers," software components such as QuickDraw, responsible for drawing onscreen graphics, and the Menu Manager, which maintain data structures describing the menu bar. As the original Macintosh was designed without virtual memory or memory protection, it was important to classify code according to when it should be loaded into memory or kept on disk, and how it should be accessed. The Toolbox consists of subroutines essential enough to be permanently kept in memory and accessible by a two-byte machine instruction; however it excludes core "kernel" functionality such as memory management and the file system. Note that the Toolbox does not draw the menu onscreen: menus were designed to have a customizable appearance, so the drawing code was stored in a resource, which could be on a disk.
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n7:Macintosh_Toolbox