IBM has found that robust product line architecture has allowed it to more rapidly leverage its technologies in microprocessors, microcode
and operating systems to new market applications.
The unique and significant contribution of the CPUSIM simulator presented in this paper is the visualization of the underlying microcode
executed for each instruction.
As a contingency plan for Host micro-code purposes, the verification team initiated, developed, and tested a rollback strategy and found the setback tests indicated that the logic built into the microcode
contain no year-specific processing checks.
"With features such as ATM traffic management being provisioned in the device microcode
, enhancing scheduling algorithms, queuing methods or adding service classes is a simple matter of downloading new code into ASPEN.
Thus, adding a feature, such as calculating the average of a group of readings, is a simple matter of adding a bit of microcode
into the instrument's ROM.
Conner's small, lightweight drive architecture was much more rugged than its 5.25-inch ancestors; it handled functions electronically that had previously been managed with mechanical parts and used microcode
to replace functions that previously had been addressed electronically.
The CacheMaster firmware microcode
stored in EEPROM can be loaded/upgraded, via modem worldwide, while the CacheMaster remains within the host system.
Alsing, the group's microcode
expert, was as warm and approachable as Tom West was cold and remote.
Within the computer there are a number of layers of software, all working in unison to produce the result desired by the user.(10) At the top of this figurative hierarchy are the application programs ("applications")--the software that describes the precise task that the user wants to accomplish.(11) Beneath the applications is the operating system, which coordinates the running of the applications, handles the complex task of storing and retrieving information, and performs many of the standard functions needed by the application.(12) At the bottom of the pile is the microcode
, which takes machine language instructions and converts them to the series of physical signals necessary to control the circuits of the computer.(13)
The i486 microprocessor's improved microcode
, integrated circuitry, and integrated 8K cache and cache controller offer dramatic improvements over i386 computing.
Even the microcode
in a ROM that embodies the entire inventive notion of a new tachometer is patentable.
Central to the operation of these and successive members of this family was a microcode
program stored in the processor's read-only memory (ROM).