參數(shù)資料
型號(hào): M80C286
廠商: Intel Corp.
英文描述: High Performance CHMOS Microprocessor With Memory Management And Protection(帶存儲(chǔ)管理和保護(hù)高性能16位CHMOS微處理器)
中文描述: 高性能CHMOS微處理器存儲(chǔ)器管理和保護(hù)(帶存儲(chǔ)管理和保護(hù)高性能16位CHMOS微處理器)
文件頁(yè)數(shù): 7/60頁(yè)
文件大?。?/td> 957K
代理商: M80C286
M80C286
Indexed Mode:
The operand’s offset is the sum of
an 8 or 16-bit displacement and the contents of an
index register (SI or DI).
Based Indexed Mode:
The operand’s offset is the
sum of the contents of a base register and an index
register.
Based Indexed Mode with Displacement:
The op-
erand’s offset is the sum of a base register’s con-
tents, an index register’s contents, and an 8 or 16-bit
displacement.
Data Types
The M80C286 directly supports the following data
types:
Integer:
A signed binary numeric value con-
tained in an 8-bit byte or a 16-bit
word. All operations assume a 2’s
complement representation. Signed
32 and 64-bit integers are supported
using the Numeric Data Processor,
the M80C287.
Ordinal:
An unsigned binary numeric value
contained in an 8-bit byte or 16-bit
word.
Pointer:
A 32-bit quantity, composed of a
segment selector component and an
offset component. Each component
is a 16-bit word.
String:
A contiguous sequence of bytes or
words. A string may contain from 1
byte to 64K bytes.
ASCII:
A byte representation of alphanu-
meric and control characters using
the ASCII standard of character rep-
resentation.
BCD:
A byte (unpacked) representation of
the decimal digits 0–9.
Packed BCD:
A byte (packed) representation of
two decimal digits 0–9 storing one
digit in each nibble of the byte.
Floating Point: A signed 32, 64, or 80-bit real num-
ber representation. (Floating point
operands are supported using the
M80C287 Numeric Processor).
Figure 6 graphically represents the data types sup-
ported by the M80C286.
I/O Space
The I/O space consists of 64K 8-bit or 32K 16-bit
ports. I/O instructions address the I/O space with
either an 8-bit port address, specified in the instruc-
tion, or a 16-bit port address in the DX register. 8-bit
port addresses are zero extended such that A
15
–A
8
are LOW. I/O port addresses 00F8(H) through
00FF(H) are reserved.
271103–5
Figure 6. M80C286 Supported Data Types
7
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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