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In the above code fragment, the symbol % is MOS Technology and WDC standard assembly language syntax for a bitwise operand. If the ISR has its own assigned stack location, preservation of the stack pointer (SP) must occur in memory after the above pushes have occurred—it should be apparent why this is so. The following code, added to the ...
A number of inexpensive safes sold to households for under $100 use mechanical locking mechanisms that are vulnerable to bouncing. Many cheap safes use a magnetic locking pin to prevent lateral movement of an internal locking bolt, and use a solenoid to move the pin when the correct code is entered. This pin can also be moved by the impact of ...
The reset vector for 6502 processor family is a 16-bit address stored at 0xFFFC and 0xFFFD. The reset vector for 6800 and 6809 processor families is a 16-bit address stored at 0xFFFE and 0xFFFF. No Reset Vector. For 8051 / 8080 / 8085 / Z80, reset starts code execution at address 0x0000.
Shows a stack backtrace for all active CPUs. l: n: l: i: Output current memory information to the console m: m, m: Reset the nice level of all high-priority and real-time tasks n: b: n: k: Shut off the system o: r: o: y: Output the current registers and flags to the console p: l: p; Display all active high-resolution timers and clock sources. q ...
This will allow the safe to be opened when the batteries are changed after the pre-set time if the correct code is entered. Some electronic combination locks with a time-delay feature require the code to be entered twice: once to start the timer, and a second to unlock and open the safe entered after the delay period has expired.
A 2038-safe replacement for time.h on 32 bit systems "Solving the Year 2038 problem in the Linux kernel". iPhone troubleshooting; Baraniuk, Chris (5 May 2015). "The number glitch that can lead to catastrophe". BBC Future. Clewett, James. "2,147,483,647 – The End of Time [Unix]". Numberphile. Brady Haran. Archived from the original on 22 May 2017
Reentrant code is designed to be safe and predictable when multiple instances of the same function are called simultaneously or in quick succession. A computer program or subroutine is called reentrant if multiple invocations can safely run concurrently on multiple processors , or if on a single-processor system its execution can be interrupted ...
Increment shadow stack pointer 3 Tiger Lake, Zen 3: INCSSPQ r64: F3 REX.W 0F AE /5: RDSSPD r32: F3 0F 1E /1: Read shadow stack pointer into register (low 32 bits) [a] RDSSPQ r64: F3 REX.W 0F 1E /1: Read shadow stack pointer into register (full 64 bits) [a] SAVEPREVSSP: F3 0F 01 EA: Save previous shadow stack pointer RSTORSSP m64: F3 0F 01 /5
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