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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.
using 8086 assembly language that interchange upper four bits to lower four bits. assume that data store in byte memory and it written back to same location. and assume the data as
Interrupt System Based on Single 8259 A The 8259A is contained in a 28-pin dual-in-line package that need only a + 5-V supply voltage. Its organization is shown in given figur
Program : Write a program to perform a one byte BCD addition. Solution : It is consider that the operands are in BCD form, but the CPU considers it as hexadecimal and acco
Write Policy A write policy determines how the cache deals with a write cycle. The 2 common write policies areWrite-Throughand Write-Back. In Write-Back policy, the cache behav
CALL : Unconditional Call:- This instruction is utilized to call a subroutine from a basic program. In case of assembly language programming, the term procedure is utilized int
errorlevel -302 ;prevents error code for this chipset __config 0x373A ;chip config PIC spec page 146 processor 16F877A ;chipset reset code
8088 Timing System Diagram The 8088 address/data bus is divided in 3 parts (a) the lower 8 address/data bits, (b) the middle 8 address bits, and (c) the upper 4 status/
Project Description: Write an 80x86 assembly program that performs the following functions: Reads a set of integers from a file into an array. The data file name is to be
8254 Programmable Timer A diagram of Intel's 8254 interval event/timer counter is given in Figure. The 8254 consists of 3 identical counting circuits, per of which has GATE and
Memory Segmentation : The memory in an 8086/8088 based system is organized as segmented memory. In this scheme, the whole physically available memory can be divided into a n
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