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ERS/FT II Subsystem
Quick Reference Guide
IES Module (ERS II)
In ERS II subsystems, the IES is a stand alone module that may optionally be installed in a slot of the backplane. The IES address is configured with two rotary switches on the module. Access to these switches can be gained from the end bracket of the module from the rear of the ERS II.
The switch labeled MS selects the Most Significant (or high order) hexadecimal digit of the IES address. The LS switch selects the Least Significant (or low order) hexadecimal digit of the IES address. Refer to Table 2 - 1 for switch settings.
Switch 1 of this DIP switch must always be in the ON (or down) position.
| IES Address | Hex Switch | IES Address | Hex Switch |
| (Decimal) | MS | LS | (Decimal) | MS | LS |
| 1 | 0 | 1 | 17 | 1 | 1 |
| 2 | 0 | 2 | 18 | 1 | 2 |
| 3 | 0 | 3 | 19 | 1 | 3 |
| 4 | 0 | 4 | 20 | 1 | 4 |
| 5 | 0 | 5 | 21 | 1 | 5 |
| 6 | 0 | 6 | 22 | 1 | 6 |
| 7 | 0 | 7 | 23 | 1 | 7 |
| 8 | 0 | 8 | 23 | 1 | 8 |
| 9 | 0 | 9 | 25 | 1 | 9 |
| 10 | 0 | A | 26 | 1 | A |
| 11 | 0 | B | 27 | 1 | B |
| 12 | 0 | C | 28 | 1 | C |
| 13 | 0 | D | 29 | 1 | D |
| 14 | 0 | E | 30 | 1 | E |
| 15 | 0 | F | 31 | 1 | F |
| 16 | 1 | 0 |
Integrated IES (ERS/FT II)
The ERS/FT II contains an integrated IES. The address of this IES is determined by an eight position DIP switch located on the top edge of the IES board, which is installed between the disk drive bay and the multiplexor board. Access to this switch can be gained as follows:
The IES address switch is the rightmost switch (closest to the power supply). Switches are numbered one to eight from left to right when viewed from the front of the subsystem. A switch is ON when it is in the up position, and OFF when it is in the down position. Table 2 - 2 contains valid IES switch configurations.
* Switch 2 under the IES connectors is not used.
Table 2-2 IES Address Configuration
IES Address |
DIP Switch Position 1 2 3 4 5 6 7 8 |
|||||||
1 |
OFF |
ON |
ON |
ON |
ON |
ON |
ON |
ON |
2 |
ON |
OFF |
ON |
ON |
ON |
ON |
ON |
ON |
3 |
OFF |
OFF |
ON |
ON |
ON |
ON |
ON |
ON |
4 |
ON |
ON |
OFF |
ON |
ON |
ON |
ON |
ON |
5 |
OFF |
ON |
OFF |
ON |
ON |
ON |
ON |
ON |
6 |
ON |
OFF |
OFF |
ON |
ON |
ON |
ON |
ON |
7 |
OFF |
OFF |
OFF |
ON |
ON |
ON |
ON |
ON |
8 |
ON |
ON |
ON |
OFF |
ON |
ON |
ON |
ON |
9 |
OFF |
ON |
ON |
OFF |
ON |
ON |
ON |
ON |
10 |
ON |
OFF |
ON |
OFF |
ON |
ON |
ON |
ON |
11 |
OFF |
OFF |
ON |
OFF |
ON |
ON |
ON |
ON |
12 |
ON |
ON |
OFF |
OFF |
ON |
ON |
ON |
ON |
13 |
OFF |
ON |
OFF |
OFF |
ON |
ON |
ON |
ON |
14 |
ON |
OFF |
OFF |
OFF |
ON |
ON |
ON |
ON |
15 |
OFF |
OFF |
OFF |
OFF |
ON |
ON |
ON |
ON |
16 |
ON |
ON |
ON |
ON |
OFF |
ON |
ON |
ON |
17 |
OFF |
ON |
ON |
ON |
OFF |
ON |
ON |
ON |
18 |
ON |
OFF |
ON |
ON |
OFF |
ON |
ON |
ON |
19 |
OFF |
OFF |
ON |
ON |
OFF |
ON |
ON |
ON |
20 |
ON |
ON |
OFF |
ON |
OFF |
ON |
ON |
ON |
21 |
OFF |
ON |
OFF |
ON |
OFF |
ON |
ON |
ON |
22 |
ON |
OFF |
OFF |
ON |
OFF |
ON |
ON |
ON |
23 |
OFF |
OFF |
OFF |
ON |
OFF |
ON |
ON |
ON |
24 |
ON |
ON |
ON |
OFF |
OFF |
ON |
ON |
ON |
25 |
OFF |
ON |
ON |
OFF |
OFF |
ON |
ON |
ON |
26 |
ON |
OFF |
ON |
OFF |
OFF |
ON |
ON |
ON |
27 |
OFF |
OFF |
ON |
OFF |
OFF |
ON |
ON |
ON |
28 |
ON |
ON |
OFF |
OFF |
OFF |
ON |
ON |
ON |
29 |
OFF |
ON |
OFF |
OFF |
OFF |
ON |
ON |
ON |
30 |
ON |
OFF |
OFF |
OFF |
OFF |
ON |
ON |
ON |
31 |
OFF |
OFF |
OFF |
OFF |
OFF |
ON |
ON |
ON |
The following switches exist on the Series II Subsystems.
ERS II Switches
Both switches are located on the top of the multiplexor. A switch is OFF when it is pointing up and ON when it is pointing to the front of the subsystem.
ERS/FT II Switches
Both switches are located on the top of the IES board (the IES Address Switch is the one closest to the power supplies). A switch is OFF when it is pointing down and ON when it is pointing up. See Tables 2 - 3 and 2 - 4 for dip switch positions.
Table 2-3 Option Switch
| Description | DIP Switch Position |
| Monitor Only | 1 |
Monitor/Keyboard/Mouse/Reset |
2 |
| Floppy Channel 1 | 3 |
| Master Console Keylock | 4 |
| Custom Channel (ERS/FT II Only) | 5 |
| Off = Option Enabled On = Option Disabled | |
Table 2-4 ERS II Mux Channel Configuration Switch
| Description | DIP Switch Position |
| Multiplexor Channel 1 | 1 |
| Multiplexor Channel 2 | 2 |
| Multiplexor Channel 3 | 3 |
| Multiplexor Channel 4 | 4 |
| Multiplexor Channel 5 | 5 |
| Multiplexor Channel 6 | 6 |
| Multiplexor Channel 7 | 7 |
| Multiplexor Channel 8 | 8 |
| Off = Channel Enabled On = Channel Disabled | |
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