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Manual Objectives UM018809-0611

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ZNEO

CPU Core

User Manual

Interrupts

Introduces the use of vectored and polled interrupts to service interrupt requests from

peripherals or external devices.

System Exceptions

Explains system exceptions and the events which cause the processor overflow, stack

overflow, divide-by-zero, divide overflow, and illegal instruction.

Software Traps

Explains the software trap instruction.

Instruction Opcodes

Numerical list of ZNEO CPU instruction opcodes and syntax.

Instruction Set Reference

Alphabetical list of ZNEO CPU instruction descriptions, with syntax and opcodes.

Manual Conventions

The following manual conventions provide clarity and ease of use.

Notations specific to assembly language, address operands, opcodes, and instruction

descriptions are explained in the chapters discussing those topics.

Courier Typeface

User-typed commands, code lines and fragments, bit names, equations, hexadecimal

addresses, and executable items are distinguished from general text by the use 

of the

Courier typeface. Where the use of the font is not indicated (for example, Index)

the name of the entity is presented in upper case.

For example, Internal RAM begins at

FFFF_0000H.

Binary Values

Binary values are designated by an uppercase ‘B’ suffix. For readability, underscore ‘_’

characters separate large values into four-digit groups, except in program statements.

For example, 8-bit binary value

0100_0010B.

Hexadecimal Values

Hexadecimal values are designated by an uppercase ‘H’ and appear in the Courier type-

face. For readability, underscore ‘_’ characters separate large values into four-digit groups,

except in program statements as illustrated in the below examples:

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 215 216

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Zilog Z16F2810 Bedienungsanleitung Seite 14