Selector Channel Simplified Logic Diagram - HP 3000 III Series Manual

I/O System
TO I2j STROBj WRIT.Ej READj
REO REO
............
SR(DATAI
CHAN SO
DEV END
ACKSR
• A IOCW
0.1.2.3
SCBUS
TO
DEVICE
CONTROLLER
-CHAN ACK
DEVNO DB
SIO ENABLE
JUMP MET
TOGGLE INXFER
CHAN SR
TOGGLE OUTXFER
TOGGLE SIO OK
REO
PCMDI
SET JUMP
PSTAT STB
PCONTSTB
PWRITE STB
RD NEXTWD
P READ STB
CHANNEL
CONTROL
AND
SEQUENCER
LOGIC
REGISTER
LOAD/READ
SIGNALS
SELECTOR
CHANNEL
Figure 7-19. Selector Channel Simplified Logic Diagram
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