Byte and word issues The MSP430 is byte-addressed, and little-endian. Word operands must be located at even addresses 1 Appending “.b” to an instruction makes it a byte operation. A byte instruction with a register destination clears the high 8 bits…
Original Link: http://hi.baidu.com/vnxuaqndtncrxyr/item/f67c83872cf80cd65e0ec10d Author: 厚积薄发 在Visual C++ 6.0中,BYTE与WORD,DWORD本质上都是一种无符号整型,它们在WINDEF.H中被定义,定义如下: typedef unsigned char BYTE;typedef unsigned short WORD;typedef unsigned long DWORD; 也就是说…
Assembler Code Content of ROMMOV @R10+,0(R11) MOV @R10+,0(R11) Length: One or two words Operation: Move the contents of the source address (contents of R10) to the destination address (contents of R11). Register R10 is incremented by 1 for a byte o…
MOV[.W] Move source to destinationMOV.B Move source to destination Syntax MOV src,dst or MOV.W src,dst MOV.B src,dst Operation src −> dst Description The source operand is moved to the destination.The source operand is not affected. The pr…
bit:The smallest storage unit of a computer byte:Common computer storage unit word:Computer natural storage unit bit:A binary number.zero or one. byte:1 byte equal to 8 bit .show 0-255 integer word:1 word lengh equal 8bit or 16bit or 32bit.The bigger…
The status register (SR/R2), used as a source or destination register, can be used in the register mode only addressed with word instructions. The remaining combinations of addressing modes are used to support the constant generator.…
JC Jump if carry setJHS Jump if higher or same Syntax JC label JHS label Operation If C = 1: PC + 2 × offset −> PC If C = 0: execute following instruction Description The status register carry bit (C) is tested. If it is set, the 10-bit signed offse…
JMP Jump unconditionally Syntax JMP label Operation PC + 2 × offset −> PC Description The 10-bit signed offset contained in the instruction LSBs is added to the program counter. Status Bits Status bits are not affected. Hint: This one-word instru…
Assembler Code Content of ROM MOV R10,R11 MOV R10,R11 Length: One or two words Operation: Move the content of R10 to R11. R10 is not affected. Comment: Valid for source and destination Example: MOV R10, R11…
