參數(shù)資料
型號: intel386 DX
廠商: Intel Corp.
英文描述: 32-Bit CHMOS Microprocessor With Integrated Memory Management(32位CHMOS 微處理器帶集成存儲管理)
中文描述: 32位CHMOS微處理器集成內(nèi)存管理(32位CHMOS微處理器帶集成存儲管理)
文件頁數(shù): 72/139頁
文件大?。?/td> 1587K
代理商: INTEL386 DX
Intel386
TM
DX MICROPROCESSOR
231630–8
K-map for A1 signal (same as Figure 5-3)
231630–9
K-map for 16-bit BHE
Y
signal
231630–10
K-map for 16-bit BLE
Y
signal (same as A0 signal in Figure 5-3)
Figure 5-7. Logic to Generate A1, BHE
Y
and BLE
Y
for 16-Bit Buses
Table 5-8. Transfer Bus Cycles for Bytes, Words and Dwords
Byte-Length of Logical Operand
1
2
4
Physical Byte Address
in Memory (low-order bits)
xx
00
01
10
11
00
01
10
11
Transfer Cycles over
32-Bit Data Bus
b
w
w
w
hb,
*
lb
d
hb
l3
hw,
lw
h3,
lb
Transfer Cycles over
16-Bit Data Bus
b
w
lb,
w
hb,
lw,
hb,
hw,
mw,
hb
lb
hw
lb,
lw
hb,
mw
lb
Key: b
e
byte transfer
w
e
word transfer
l
e
low-order portion
m
e
mid-order portion
x
e
don’t care
e
BS16
Y
asserted causes second bus cycle
*
For this case, 8086, 8088, 80186, 80188, 80286 transfer lb first, then hb.
3
e
3-byte transfer
d
e
Dword transfer
h
e
high-order portion
72
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