AEDIT-86Variables

AEDIT-86User's Guide

•Under the CALC command. The variable may be retrieved as in any line-edit prompt. Also, the variable name may be used as is, e.g., N I instead of

<FETN ) I. In this case the name, rather than the value, is displayed, e.g., N I instead of 45. The entire processing is done by the CALC command, not by the line-editing mechanism. A variable may be modified only if it appears in CALC with its name on the left-hand side of an assignment statement.

When the (FETN) key is pressed, the message (FETN) appears on the message line. This message disappears when the next key is pressed.

6.1.2 Global String Variables

The two groups of global string-variables (S-variables) are-

•Read-write string variables

•Read-only string variables

Read-Write String Variables

The ten read-write variables are SO-S9. Value assignment is done only in the CALC command. When AEDIT-86 is invoked, these variables are initialized to a nul1 string.

Read-Only String Variables

The following is an alphabetic list of the read-only variables. No assignment of values is allowed.

SB

Up to 60 characters of the Block buffer. By using SB, a portion of the

 

text file may be used later as, for example, an argument in a FIND

 

command.

SE

The name of the current edited file (as opposed to the secondary file).

SG

The name of the last file specified in the GET command.

SI

The name of the main input file.

SM

The name of the last file specified for the MACRO Get command.

SO

The name of the OTHER input file.

SP

The name of the last file specified for the BLOCK Put command.

SR

The replacement string of (?)REPLACE.

ST

The target string of (-)FIND and (?)REPLACE.

SW

The name of the last file specified in the QUIT Write command.

Using String Variables

To fetch the value of a string variable, type (FETS) x, (FETS) is the ·<fetch string" key (usually configured to (CTRL-S», and where x is a digit (0-9) or a letter appearing as the second letter in a name in the above list (e.g., B, E, G). For example, (FETS) 7 fetches the value of S7, and (FETS) G fetches the value of SG. An S-variable contains a string of 0-60 characters.

6-2

Page 87 Page 89
Page 88
Image 88
Intel AEDIT-86 Global String Variables, Read-Write String Variables, Read-Only String Variables, Using String Variables
Page 87 Page 89

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.
Top Page Image Contents