APPENDIX D

USING AEDIT-86 ON THE SERIES IV

AEDIT-86 runs on the iNDX operating system on the Intellec Series IV Microcom- puter Development System.

o. 1 Invocation Command

The invocation line is as described in Chapter 4.

If you are starting the tutorial in Chapter 1, type the following:

-~ ~ J T (R E T URN >

0.2Keyboard

The Series IV keyboard has soft keys. Therefore, all commands may be invoked either with the initial letter of the command or with the corresponding soft key.

CHAR DELETE The CHAR DELETE (delete character) key deletes the charac- ter "under" the cursor.

CLEAR LINE The CLEAR LINE key deletes the entire line on which the cursor is positioned.

Most keys have a built-in automatic repeat function. To enter multiple characters, simply continue pressing the same key. The <HOME) and <ESC) keys do not repeat automatically.

D.2.1 Soft Keys

Eight function keys labeled FO-F7 are located at the top of the keyboard. They corre- spond to the menu prompt line displayed on the bottom of the screen. These keys are called soft keys because their meaning changes depending on which menu prompt line is displayed. Pressing the soft key that corresponds to a menu selection displayed on the screen executes that command. Press the eighth soft key or <TAB) to display the next set of options.

The function keys may be also used as single character macros under INSERT or XCHANGE mode. To define a macro associated with <Fl ), for example. you should type-

I-ACRO) I<REATE) <;:-1> <RETURN>

The hex code of <Fl ) appears on the screen when the <Fl ) key is pressed. The macro is activated simply by pressing <Fl ) while in INSERT or XCHANGE mode.

Error. "illegal command" is displayed if a soft key that has no corresponding option is pressed. This is because some prompt lines have fewer than eight options~ therefore. not all the soft keys are used.

D-1

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Intel manual Appendix D Using AEDIT-86 on the Series, Invocation Command, Keyboard, Acro Ireate -1 Return

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.