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The 6502 instruction set includes BRK (opcode $00), which is technically a software interrupt (similar in spirit to the SWI mnemonic of the Motorola 6800 and ARM processors). BRK is most often used to interrupt program execution and start a machine language monitor for testing and debugging during software development.
An illegal opcode, also called an unimplemented operation, [1] unintended opcode [2] or undocumented instruction, is an instruction to a CPU that is not mentioned in any official documentation released by the CPU's designer or manufacturer, which nevertheless has an effect.
The status register (SR) is pushed onto the stack. The interrupt disable flag is set in the status register. 65C816/65C802: PB is loaded with $00. PC is loaded from the relevant vector (see tables). The behavior of the 65C816 when ABORT is asserted differs in some respects from the above description and is separately discussed below.
The original 6502 has 56 instructions, which, when combined with different addressing modes, produce a total of 151 opcodes of the possible 256 8-bit opcode patterns. The remaining 105 unused opcodes are undefined, with the set of codes with low-order 4-bits with 3, 7, B or F left entirely unused, the code with low-order 2 having only a single ...
At the same time, the airline's spokesperson confirmed audio and flight-tracking data showed the helicopter flew about 300 feet from the ground. According to audio from LiveATC.net, ...
Flight tracking enables travellers as well as those picking up travellers after a flight to know whether a flight has landed or is on schedule, for example to determine whether it is time to go to the airport. Aircraft carry ADS-B transponders, which transmit information such as the aircraft ID, GPS position, and altitude as radio signals.
An EasyJet flight heading to England was forced to make an emergency landing in Greece after the pilot reportedly collapsed.. The aircraft was traveling from Hurghada, Egypt to Manchester, England ...
WASHINGTON (Reuters) -Air traffic control audio recorded the moments before and after an American Airlines regional passenger jet crashed with a U.S. Army Black Hawk helicopter in a midair ...