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DEC :
A powerful new Alpha 64 bit RISC computer chip was introduced in the year 1977, as new VAX (Virtual Address Extension) Computer. The VAX was 32 bit computer line based on operating system, called VMS. This new computer system was more powerful and had better time-sharing capabilities than past DEC systems DEC net networking technology-enabled customers to attach different types of DEC computers together from small workstations to large corporate servers.
As the 80s drew to a close DECs were not IBM compatible and were designed as a way for users to attach to DEC server systems rather than stand-alone products. And DEC manufactured all the components for its PCs, resulting in systems that were much more costly than other PC vendors.
From 1984 to 1988 DEC developing its own RISC chip, the PRISM. By using these chips, DEC introduced a UNIX workstation running on its own UNIX, Ultrix
The RISC chips are to be utilized in these new VAXes was a new 64 Bit chip, designed by DEC, code-named the Alpha.
which uses BIOS interrupt INT 21 to read current system time and displays it on the top-left corner of screen.
Modes of 8254 : Mode 0 (Interrupt on Terminal Count)-GATE which value is 1 enables counting and GATE which value is 0 disables counting, and GATE put not effect on
8279 Keyword /Display Controller : Figure shows the structure of 8279 and its interface to the bus. Addressing is according to the table given below. CS RD
segmentation and overlapping in assemble language
Read Architecture : Look Aside Cache In "look aside" cache architecture the main memory is located conflictingthe system interface. Both the cache main memory sees a bus cycle
Project Overview In this series of projects you will write a compiler for a small subset of Pascal. In this assignment, you will start writing the syntax analysis and code gen
describes vertical and horizontal web services protocols. Next, identify the similarities and differences between vertical and horizontal web services protocols. Finally, explain w
The definitions of the bits in ICWI are following: Always set to the value 1. It directs the received byte to ICWI as oppose to OCW2 or OCW3. Which also utilize the even addr
Memory Interface Figure: Memory Modulation design The memory of a computer contain of number of memo
Pointer and Index Registers The pointers contain offset within the specific segments. The pointers BP, IP and SP generally containoffsets within thedata, code and stack segment
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