IBM System/370 145 Reference Summary page 135

Byte Bit Sw -OB
0
0-7
Rotary Switches A and B
1
0-7 Rotary Switches C and D
2
0-7 Rotary Switches E and F
3 0-7 Rotary Switches G and H
PA011,PA041,PA211,PA241
Byte
Bit MPX-OE
0 Operation Out
1 Select Out
2 Address Out
0 3
MTO Command Out
4 Service· Out
5
Interrupt
6 Suppress Out
7 Spare
FA013
0
Operation In
*Bits
1
Address In 23
l-2
Status In
--
1
1*3 MTI Service In 00 =Operation In-Up
4 Select In
01 =Service In-Up
5
MPX Request In 10 =Status In-Up
6
MPX or Console 11 = Operation In-Up
Request In
7
Disconnect In
FA011 FA012
2
0-7 MBI MPX Channel Bus-In Data
FA111 FA121
3
0-7 MBO MPX Channel Bus-Out Data
FA014
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11.11