De Editor Basics

AEDIT-86 User's Guide

AEDIT-86 does not write past the last column of the message line. If a message does not fit. ! is printed as the last character. .

When the message line contains status information, usually an error message, the message line goes blank as soon as any key is pressed.

2.5.3 Text Area

The rest of the screen is the text area.

2.6Beep Warning

The editor beeps when you try to do something illegal, for example:

•Attempting to execute an illegal command

•Typing an invalid character during INSERT or XCHANGE mode

•Typing more than 60 characters in a line-edited prompt

•Entering a repeat count greater than the maximum value

It also beeps when presenting some of the error messages.

2.7.Lines and Line Terminators

A line of text consists of a sequence of characters terminated by a carriage return / line feed. This pair of characters, called the line terminator, is entered in the file when you press <RETURN) . (RETURN is displayed on the screen as a blank.)

If a line is over 80 characters long, an exclamation point (!) is displayed in the last column on the screen. The portion of the line that does not fit on the screen is not displayed. To view the portion that is not displayed, use the SET Leftcol command (described in Chapter 3).

Aline may contain any number of characters. AEDIT-86 breaks lines longer than 255 characters into 255-character segments. A plus sign ( +) is displayed at the end of each segment.

2.8Printing and Nonprinting Characters

In general, all characters except those with ASCII values under 20H and characters with hexadecimal values equal to or above 7FH are displayed on the screen. All characters that are not displayed on the screen print as a question mark (?). Carriage return and tab print as blanks. If the Highbit feature (described in Chapter 3) is set. characters with hexadecimal values over 7FH are displayed as is.

2.9Tags

Tags identify locations in a file. You can specify four locations, A through D. with the TAG command and use them as destinations for the JUMP command. Tags are invisible and are not saved when you exit the file.

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Intel AEDIT-86 manual Beep Warning, Lines and Line Terminators, Printing and Nonprinting Characters, Tags, Text Area
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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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