De Editor Basics

AEDIT-8()User's Guide

cRUBOUT)

The RUBOUT key deletes the character to the left of the cursor

 

at main command level or INSERT mode. In XCHANGE mode,

 

<RUBOUT) replaces the new character to the left of the cursor

 

with the original character.

<TAB)

The TAB key rotates the menu prompt line to display the next

 

line of commands. In INSERT or XCHANGE modes, <TAB)

 

inserts blanks to the next defined tab stop (the default is every

 

fourth column).

2.2 Cursor

The cursor indicates the entry point for all information. The cursor may be displayed as a solid nonblinking block, as an underline, as a solid blinking block, etc., depending on your terminal.

The term cursor refers both to the cursor displayed on the screen (the physical cursor) and to the current file location (the character "under" the cursor, or logical cursor). The physical and logical cursor diverge only when the physical cursor leaves the text area for prompt lines (for example, to enter a search command) or when the <UP ) or <DOWN) command moves the cursor to a screen location past the end of a line. When the cursor is located past the end of a line, all commands except the <UP ) and <DOWN) commands (including <TAB) or an illegal command) move the cursor back to the end of the line, before execution.

The actual cursor position is the space between the character on which it appears and the character immediately to the left. Thus, for some commands (e.g., INSERT, BLOCK, <DELL), <DELR ) ), characters are inserted (or deleted) directly before the character under the physical cursor. Some commands (e.g., XCHANGE and c DELCH ) ) operate on the character immediately to the right of the actual cursor position; otl)er commands (e.g., <RUBOUT) ) operate on the character immedi- ately to the left of the actual cursor position.

2.3 End-of-File Marker

The end-of-file (EOF) marker is a vertical bar (I) that indicates the end of a file. If the end of a file is on the screen, the EOF marker is displayed immediately after the last character of the file.

2.4 Screen-Mode Editing

AEDIT-86's greatest advantage is its ability to display and verify changes to the text as you make them. You can move through your file making changes, insertions, and deletions, verifying them as you go. You can examine a screenful of text, locate the text you want to change, change it, and review the next screenful of text. A portion of text is always displayed on the screen.

2.5 AEDIT-86 Display/Menu Format

AEDIT-86 requires a CRT terminal (or a CRT section) with at least a 5-line, 80- column display screen (columns are numbered from 0 to 79). The cursor is the refer- ence point for all operations, e.g., INSERT, FIND, DELETE, REPLACE. The screen is divided into the following three sections (listed from bottom up):

•Prompt line

•Message line

•Text area

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Intel AEDIT-86 manual Cursor, Tab
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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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