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OMF-51 Object Module Format

Created on 31 July 2011. Posted in Documentation

EXTERNAL PRODUCT SPECIFICATION V5.0 APPROVED Sept. 05, 1982 Download Original document TABLE OF CONTENTS PREFACE OVERVIEW OF 8051 ARCHITECTURE Code Space External Data Space Internal ...

8051 C Compiler

Created on 31 July 2011. Posted in Documentation

Some Prefer C Programming Language If you don't like Pascal programming language then you are probably looking for C. And there is a great free C compiler for 8051, SDCC - Small Device C Compiler. What ...

8051 IP Cores

Created on 31 July 2011. Posted in Documentation

Free 8051 IP Cores Oregano 8051 IP Core The 8051 IP Core was developed in cooperation with the Arbeitsgruppe CAD / TU-Wien. This processor core is binary compatible to the well known 8051 processor ...

8051 Instruction Set

Created on 31 July 2011. Posted in Documentation

Description of All Instructions The following table lists the 8051 instructions sorted by opcode and the next table lists the 8051 instructions in the alphabetical order. The tables are followed with ...

8051 Opcodes

Created on 31 July 2011. Posted in Documentation

List of All Instruction Types The following table lists the 8051 instructions sorted by the opcode. The instructions can be divided into 5 categories: arithmetic instructions. logic instructions, data ...

8051 Microcontroller

Created on 31 July 2011. Posted in Documentation

8-bit Core Still in Use The Intel 8051 (official designation for 8051 family is MCS-51) is a Harvard architecture, single chip microcontroller (µC) which was developed by Intel in 1980 for use ...

Turbo51 Methods

Created on 31 July 2011. Posted in Documentation

Pascal Compiler for 8051 Microcontrollers Methods are always reentrant. Before a call to the method is made the following is pushed on the XDATA stack: Address for String result (for functions ...

Reentrant Procedures in Turbo51

Created on 31 July 2011. Posted in Documentation

Pascal Compiler for 8051 Microcontrollers For reentrant procedures all parameters are pushed on XDATA stack. Functions return simple result in first register set (R5R4R3R2). For functions which return ...

Turbo51 Compiler Internals

Created on 31 July 2011. Posted in Documentation

Pascal Compiler for 8051 Microcontrollers If you are interested in Turbo Pascal compiler internals and would like to see the source code of some popular commercial Pascal compiler then check Turbo Pascal ...

8051 Assembler Statements

Created on 31 July 2011. Posted in Documentation

Pascal Compiler for 8051 Microcontrollers Turbo51 assembler statement is very similar to 8051 assembler. You can use all instructions from the 8051 instruction set. Labels starting with @ don't have ...

8051 Interrupts in Turbo51

Created on 31 July 2011. Posted in Documentation

Pascal Compiler for 8051 Microcontrollers Interrupts are procedures declared with the Interrupt directive and interrupt address. In this example Timer0 is a constant defined in the System unit. For ...

Procedure at Absolute Address

Created on 31 July 2011. Posted in Documentation

Pascal Compiler for 8051 Microcontrollers You can force placing a procedure at absolute address with the absolute directive. This way you can also reserve some bytes at fixed addresses in code segment. ...

Turo51 Inline Procedures

Created on 31 July 2011. Posted in Documentation

Pascal Compiler for 8051 Microcontrollers Procedures (and functions) that are declared with the Inline directive are copied to the places where they are called. This has the effect that there is no ...

Turbo51 Assembler Procedures

Created on 31 July 2011. Posted in Documentation

Pascal Compiler for 8051 Microcontrollers Here you can see some examples of procedures written entirely in 8051 assembly language. At the end of each procedure Turbo51 adds only RET instruction (or ...

Turbo51 System Functions

Created on 31 July 2011. Posted in Documentation

Pascal Compiler for 8051 Microcontrollers Abs Function Abs (X: Integer): Integer; Function Abs (X: Real): Real; Abs returns the absolute value of a variable. The result of the function ...

Turbo51 System Procedures

Created on 31 July 2011. Posted in Documentation

Pascal Compiler for 8051 Microcontrollers Assign Procedure Assign (Var F: File; ReadFunction: Function; WriteProc: Procedure); Procedure Assign assigns read function and write procedure to ...

Turbo51 Variables

Created on 31 July 2011. Posted in Documentation

Pascal Compiler for 8051 Microcontrollers Turbo51 variables can have memory type directives DATA, IDATA, or XDATA which overrides default memory type for variables (IDATA memory with addresses starting ...

Turbo51 Types

Created on 31 July 2011. Posted in Documentation

Pascal Compiler for 8051 Microcontrollers Turbo51 provides the following system types: Byte (unsigned 8-bit), Word (unsigned 16-bit), ShortInt (signed 8-bit), Integer (signed 16-bit), LongInt (signed ...

Turbo51 Constants

Created on 31 July 2011. Posted in Documentation

Pascal Compiler for 8051 Microcontrollers Turbo51 constants can be of any ordinal type. Typed constants are stored in CODE memory (in little endian format) and can not be modified. Boolean typed constants ...

Turbo51 Objects

Created on 30 July 2011. Posted in Documentation

Pascal Compiler for 8051 Microcontrollers Objects are data structures that merge pascal records and procedures called methods, i.e. data and code together. In order to use objects in Turbo51 you need ...
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