HP 3000 III Series Manual page 281

I/O System
MEMORY
MULTIPLEXER CHANNEL
DRT
I/O Prog
D
I/O Prog
I/O Prog
D
2
l6-Cell
Solid-State
Memorv
Device
Cont.
8
Data
MEMORY
Device
Cont.
SELECTOR CHANNEL
_-- (if§l __
DRT
-2]
I/O Prog
D
I/O Prog
D
------"'
--
- -
--,
l[j+B
Figure 7-14. MUltiplexer and
S~lector
Channel Comparisons
service request when it is ready (6), causing another readout of
the stored information (7) and a transfer of data (8). Updated
operation information is restored (9). Steps (6) through (9)
are repeated for each word transferred. (For a more detailed
discussion, refer to paragraph 7-33.)
7-27