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In the mid-1990s, a facility for supplying new microcode was initially referred to as the Pentium Pro BIOS Update Feature. [18] [19] It was intended that user-mode applications should make a BIOS interrupt call to supply a new "BIOS Update Data Block", which the BIOS would partially validate and save to nonvolatile BIOS memory; this could be supplied to the installed processors on next boot.
CD Player is a computer program that plays audio CDs using the computer's sound card. It was included in Windows 95, Windows 98, Windows NT 3.51, Windows NT 4.0 and Windows 2000 (as Deluxe CD Player). It was removed from Windows ME and beyond in favor of "CD/DVD playback functionality" in Windows Media Player.
0F 8x cd [g] Conditional jump near. Differs from older variants of conditional jumps in that they accept a 16/32-bit offset rather than just an 8-bit offset. IMUL r, r/m: 0F AF /r: Two-operand non-widening integer multiply. FS: 64: Segment-override prefixes for FS and GS segment registers. 3 GS: 65: PUSH FS: 0F A0: Push/pop FS and GS segment ...
Microcode can be characterized as horizontal or vertical, referring primarily to whether each microinstruction controls CPU elements with little or no decoding (horizontal microcode) [a] or requires extensive decoding by combinatorial logic before doing so (vertical microcode). Consequently, each horizontal microinstruction is wider (contains ...
bits 11–10: CD field; bits 9–6: CA field; bit 5: always 0; bits 4–1: high-order 4 bits of the Q register, which is the right input to the 8-bit ALU; bit 0: result of the test specified by the CC field; The CC field can specify various tests of the state of the machine. It can also specify a constant 0 or 1 for an unconditional bit.
Initially MikroSim was developed to be a processor simulation software to be widely available in educational areas. Since MikroSim operability starts on the basis of microcode development, defined as a sequence of micro instructions (microcoding) for a virtual control unit, the software's intention is on first approach a microcode simulator with various levels of abstractions including the ...
A control store is the part of a CPU's control unit that stores the CPU's microprogram.It is usually accessed by a microsequencer.A control store implementation whose contents are unalterable is known as a Read Only Memory (ROM) or Read Only Storage (ROS); one whose contents are alterable is known as a Writable Control Store (WCS).
In the context of free and open-source software, proprietary software only available as a binary executable is referred to as a blob or binary blob.The term usually refers to a device driver module loaded into the kernel of an open-source operating system, and is sometimes also applied to code running outside the kernel, such as system firmware images, microcode updates, or userland programs.