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Many variants of the 8051 include the standard 256 bytes of IRAM plus a few kilobytes of XRAM on the chip. The first 256 bytes of XRAM may be accessed using the MOVX A, @ R0, MOVX A, @ R1, MOVX @ R0, A, and MOVX @ R1, A instructions. The full 64 KB may be accessed using MOVX A, @ DPTR and MOVX @ DPTR, A. The 16-bit address requires the ...
push a byte onto the stack as an integer value: breakpoint ca 1100 1010 reserved for breakpoints in Java debuggers; should not appear in any class file caload 34 0011 0100 arrayref, index → value load a char from an array castore 55 0101 0101 arrayref, index, value → store a char into an array checkcast c0 1100 0000 2: indexbyte1, indexbyte2
Java bytecode is used at runtime either interpreted by a JVM or compiled to machine code via just-in-time (JIT) compilation and run as a native application. As Java bytecode is designed for a cross-platform compatibility and security, a Java bytecode application tends to run consistently across various hardware and software configurations. [3]
Many object file formats consist of a set of tables, such as the relocation table, which are either stored on fixed positions in the file, like the a.out format, or are pointed to by the header, like the ELF format. The "sections", code, data area, etc., are stored as contiguous areas of bytes within such files.
Files that contain machine-executable code and non-textual data typically contain all 256 possible eight-bit byte values. Many computer programs came to rely on this distinction between seven-bit text and eight-bit binary data, and would not function properly if non-ASCII characters appeared in data that was expected to include only ASCII text.
The Z80 uses 252 out of the available 256 codes as single byte opcodes ("root instruction" most of which are inherited from the 8080); the four remaining codes are used extensively as opcode prefixes: [46] CB and ED enable extra instructions, and DD or FD select IX+d or IY+d respectively (in some cases without displacement d) in place of HL.
Windows Virtual PC Virtual Hard Disk file format [85] 76 68 64 78 66 69 6C 65: vhdxfile: 0 vhdx Windows Virtual PC Windows 8 Virtual Hard Disk file format 49 73 5A 21: IsZ! 0 isz Compressed ISO image: 44 41 41: DAA: 0 daa Direct Access Archive PowerISO 4C 66 4C 65: LfLe: 0 evt Windows Event Viewer file format 45 6C 66 46 69 6C 65: ElfFile: 0 evtx
File-based disk image format developed to deploy Microsoft Windows. .xar application/x-xar XAR: Multiple Multiple Yes .xp3 KiriKiri: Windows: Windows: Yes Native format of the Open Source KiriKiri Visual Novel engine. Uses combination of block splitting and zlib compression. The filenames and pathes are stored in UTF-16 format.