CHAPTER 3

EDITING COMMANDS

This chapter describes all AEDIT-86 commands. Most of the commands are described in depth. However, some commands are only mentioned here and fully described in Part II.

3. 1 Cursor Movement Commands

The cursor movement commands control cursor movement in a file. (LEFT), (RIGHT), (UP), and <DO\\'N) refer to keys labeled with directional arrows;

<HOME) refers to the key labeled (HOME) (or configured for this function).

3. 1. 1 ( LEFT)

The LEFT command moves the cursor one character to the left.

Special cases of (LEFT) are-

•If the cursor is on the first character of the file, the command is ignored.

•If the cursor is at the top of the screen and at the beginning of the line, the screen is rewritten/scrolled to display previous line(s) of text (the number of lines scrolled is terminal dependent).

•If the cursor is at the beginning of a line, the cursor moves to the last character of the previous line.

•If the cursor is moving to a tab, (LEFT) skips over the tab.

Count. This command accepts any count where count multiplies the distance moved. If count is / or greater than the number of characters that exist from the beginning of the file to the current cursor position, the cursor jumps to the beginning of the file. The result of a repeated move is not displayed until the move is complete.

Related Commands. <HOME)

3.1.2 (RIGHT)

The RIGHT command moves the cursor one character to the right.

Special cases of < RIGHT) are-

•If the cursor is on the EOF marker, the command is ignored.

•If the cursor is on the last character of the last text line on the screen, the screen scrolls up (usually one line).

•If the cursor is on the last character of a line, it moves to the beginning of the next line.

•If the cursor is moving to a tab, (RIGHT) skips over the tab.

Count. This command accepts any count where count multiplies the distance moved. If count is / or greater than the number of characters that exist in the file from the current cursor position to the end of the file, the cursor jumps to the end of the file. The result of a repeated move is not displayed until the move is complete.

Related Commands. <HOM E )

3-1

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Intel AEDIT-86 manual Chapter Editing Commands, Cursor Movement Commands, Left, Right
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AEDIT-86 specifications

The Intel AEDIT-86, also known as the Intel 8086, is a notable microprocessor that played a critical role in shaping the computing landscape. Released in 1978, it was Intel's first 16-bit microprocessor, setting the stage for the x86 architecture that continues to influence modern computing.

One of the main features of the AEDIT-86 is its 16-bit architecture, which allows it to process data in larger chunks compared to its 8-bit predecessors. This capability not only improves performance but also increases the amount of memory that can be addressed, allowing for a maximum of 1 MB of RAM. This was a significant advancement at the time, enabling more complex software and operating systems to run efficiently.

The AEDIT-86 is built on a 3-micron process technology, which was innovative for its time and contributed to its performance capabilities. The microprocessor operates at a clock speed of up to 5 MHz, which allowed it to execute more instructions per second than previous generations of processors. This speed, combined with its wide data bus (16 bits), enables the processor to handle a larger volume of information more quickly.

Intel incorporated several key technologies in the AEDIT-86, including segmentation. This feature divides the memory into different segments, making it easier for programs to access data and improving memory management. The AEDIT-86 also supports a minimum of four 64 KB segments, which enhances the organization and access of programs and data in memory.

Another significant aspect of the AEDIT-86 is its compatibility with the existing 8080 and 8085 instruction sets, which facilitated easier migration for developers and helped the processor gain traction in the market. This backward compatibility allowed existing software to be ported to the new platform with minimal modification.

Furthermore, the Intel AEDIT-86 introduced a powerful instruction set that includes both integer and string manipulation commands, paving the way for more versatile programming. The instruction set architecture (ISA) of the AEDIT-86 supports both high-level programming languages and low-level assembly language, offering flexibility for various applications.

In summary, the Intel AEDIT-86 is a groundbreaking microprocessor known for its 16-bit architecture, advanced segmentation technology, and compatibility with earlier instruction sets. Its introduction marked the beginning of the x86 architecture, which has influenced countless processors and computing systems that followed. The AEDIT-86's features and technologies were instrumental in the evolution of personal computing, laying the groundwork for future innovations in the industry.
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