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150
Am79C930
ISA Bus Interface Waveforms
20138B-14
**
CMD
= one of:
MEMR
,
MEMW
,
IOR
,
IOW
LA
n
CMD**
SD
out
(read)
t
i
1
t
i
8
t
i
34
t
i
3
t
i
14
IOCHRDY
t
i
7
t
i
4 t
i
20
AEN
BALE
SA
n
t
i
2
t
i
10
SD
in
(write)
t
i
11
t
i
12
t
i
13
t
i
15
t
i
21
t
i
22
t
i
23
t
i
25
t
i
26t
i
30
t
i
31t
i
32
t
i
9
t
i
16
Figure 8. ISA All Access Timing Diagram