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Bit
Status
Signals
0
D/C#
1
M/IO#
2
W/R#
3
HLDA
HP E2444A
80386DX/DXL Preprocessor Interface
Figure 2-5. Symbol Table for the BE Label
Table 2-1. Description of the Status Bits
Signal is high for a data cycle and low for a control cycle.
Signal is high for memory and low for I/O.
Signal is high for a write cycle and low for a read.
Signal goes high when the microprocessor has relinquished
control of the bus.
Description
Analyzing the Intel 80386DX/DXL
2-5
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