... address spaces - the code space, the external data space and the on-chip RAM. Some sections of the on-chip RAM space serve functions in addition to being the usual random access byte storage. These include ...

... 8 bit MCUs independent rule based peep hole optimizer. a full range of data types: char (8 bits, 1 byte), short (16 bits, 2 bytes), int (16 bits, 2 bytes), long (32 bit, 4 bytes) and float (4 byte ...

... for memory mapped peripherals T8032: Wishbone bus interface Features All peripherals/interrupts implemented Single cycle per byte fetch Supports synchronous RAM/ROM  ...

... Through Carry SETB - Set Bit SJMP - Short Jump SUBB - Subtract From Accumulator With Borrow SWAP - Swap Accumulator Nibbles XCH - Exchange Bytes XCHD - Exchange Digits ...

... transfer instructions, boolean variable manipulation instructions and program and machine control instructions. OpcodeBytesMnemonicOperands 00 1 NOP   01 2 AJMP addr11 ...

... of RAM and ROM On-chip RAM - 128 bytes ("DATA Memory") On-chip ROM - 4 kB ("CODE (program) Memory") Four 8-bit bi-directional input/output ports UART (serial port) Two 16-bit ...

... in re-entrant procedures. In such cases you can use system type ByteBool which occupies 1 byte. Global variables Global variables are placed in default memory type for global variables which can be ...

... to be declared. You don't have to preserve any register and don't assume anything about register content before assembler statement. Byte variables AR0 to AR7 are direct locations for registers R0 to R7 ...

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. ...

...  Function Assigned (P: Pointer): Boolean; Assigned returns True if P is non-nil and retuns False otherwise. P can be any pointer or procedural variable. Bcd Function Bcd (D: Byte): Byte; Bcd ...

... file variable F. Either ReadFunction or WriteProc can be omitted. Read function must be a non-reentrant function with no parameters which returns Char or Byte result (result must be returned in register ...

... procedures. In such cases you can use system type ByteBool which occupies 1 byte. BitAddressable directive declares variable which will be placed in DATA address space from $20 to $2F - you can access ...

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 ...

... are not possible because boolean data can only be stored as bits in bit-addressable DATAmemory (wich is available in all 8051 derivatives), but you can use ByteBool or similar typed constants. Some examples: ...

Pascal Compiler for 8051 microcontrollers CODE memory By default the maximum code size is $10000 bytes (64 KB). This can be changed in the main program with the $M directive. IDATA memory By ...

Popular Microcontroller Resources 8051 Opcodes Here you have a table of all 8051 instructions with opcodes, size in bytes, mnemonic and operands. 8051 Instruction Set Here you have a detailed ...

... type ByteBool (WordBool and LongBool are also possible), this will occupy one byte (or 2 for WordBool and 4 bytes for LongBool) Use sets. See some examples of sets in records on the inline procedures ...