Programmer's key
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The programmer's key, or interrupt button, is a button or switch on Classic Mac OS-era Macintosh systems, which jumps to a machine code monitor. The symbol on the button is ⎉: Page Template:Mono/styles.css has no content.U+2389 ⎉ Script error: No such module "Unicode data". (Page Template:Mono/styles.css has no content.Script error: No such module "LoadData".). On most 68000 family based Macintosh computers, an interrupt request can also be sent by holding down the command key and pressing the power key on the keyboard. This effect is also simulated by the 68000 environment of the Mac OS nanokernel on PowerPC machines and the Classic environment.
Pressing the interrupt button during startup crashes the system and displays the Sad Mac.
A plastic insert came with Macintosh 128K, Macintosh 512K, Macintosh Plus, and Macintosh SE computers that could be attached to the exterior of the case and was used to press an interrupt button located on the motherboard.[1][2]
Modern Mac hardware no longer includes the interrupt button, as the macOS operating system has integrated debugging options. In addition, macOS's protected memory blocks direct patching of system memory (in order to better secure the system).
See also
References
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- ^ Page Module:Citation/CS1/styles.css has no content.Torres, Gabriel (January 2, 2013). "Inside the Macintosh Plus". Hardware Secrets. Retrieved September 18, 2018.
- ^ Page Module:Citation/CS1/styles.css has no content.Cuccia, Sandro (January 25, 2014). "Happy Birthday, Mac - How to Recover From the Dreaded Bomb Box Error Message". The Mac Observer. Retrieved September 18, 2018.
External links
- Script error: No such module "webarchive".
