A micro-instruction in the 8086 is encoded into 21 bits as shown below. Every micro-instruction has a move from a source register to a destination register, each specified with 5 bits; this encoding is the main topic of this blog post. The meaning of the remaining bits depends on the ty...
Intel introduced the 8086 microprocessor in 1978. This processor ended up being hugely influential, setting the path for the x86 architecture that is extensively used today. One interesting feature of the 8086 was instructions that can efficiently operate on blocks of memory up to 64K bytes long....
a) 1:1 b) 1:2 c) 1:4 d) 1:8 3) The ALU of the 8088 microprocessor can perform its operation on the data whose size is ... a) 4 bits b) 8 bits c) 16 bits d) 32 bits 4) The ratio of the size of the physical memory of...
“xlat” replaces a byte in the AL register with a byte indexed by its value in a translation table addressed by BX or EBX. The operand should be a byte memory addressed by BX or EBX with any segment prefix. This instruction has also a short form “xlatb” which has no operands and...
Which of the following is true according to this passage A. Chad Lake located in the middle of Chad in northern Africa. B. The water from Chad water can now only be used for irrigation. C. The area around Chad Lake has suffered from heavy rain lack many decades. D. Population around...
The base register gets its name from the XLAT instruction. XLAT looks up a value in a table using AL as the index and EBX as the base. XLAT is equivalent to MOV AL, [BX+AL], which is sometimes useful if you need to replace one 8-bit value with another from a table (Think of ...
The base register gets its name from the XLAT instruction. XLAT looks up a value in a table using AL as the index and EBX as the base. XLAT is equivalent to MOV AL, [BX+AL], which is sometimes useful if you need to replace one 8-bit value with another from a table (Think of ...
The base register gets its name from the XLAT instruction. XLAT looks up a value in a table using AL as the index and EBX as the base. XLAT is equivalent to MOV AL, [BX+AL], which is sometimes useful if you need to replace one 8-bit value with another from a table (Think of ...
The Intel 8086 processor started the x86 architecture that is still extensively used today. The 8086 has some quirky characteristics: it is little-endian, has a parity flag, and uses explicit I/O instructions instead of just memory-mapped I/O. It has four 16-bit registers that can be ...