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- SWITCH.DOC
-
- Quick reference PCA 16/4 Token-Ring Adapter switches.
-
-
- SWITCH 8-1
- ┌──────╥╥╥╥─────────────┐
- │ ┌╨╨╨╨┐ │╔══
- │ └────┘ ┌────┐ │║
- │ ┌──────┐ │ │┌──┴╢
- │ │ │ │ ││ ║ UTP connector
- │ │ │ └────┘│ ║ (Unshielded Twisted Pair)
- │ │ │ └──┬╢
- │ │ │ │║
- │ └──────┘ ┌─┴╫─┐
- │ │ ║ │ STP connector
- │ ┌────────┐ │ ║ │ (Shielded Twisted Pair)
- │ │ RPL │ └─┬╫─┘
- │ │ SOCKET │ │║
- │ └────────┘ │║
- └─┐ ┌───┘║
- │║║║║║║║║║║║║║║║║║│ ║
- └╨╨╨╨╨╨╨╨╨╨╨╨╨╨╨╨╨┘ ║
- ║
-
-
- Switch # 1 2,3 4,5 6..8
-
- Ring I/O Address Interrupt RPL Address
- Speed Select select select
-
- | | | |
- | | | ___|___
- | | | / \
- | | | 14 15 16
- | | |
- | | | off off off RPL disabled *
- | | | on off off C6000
- | | | off on off CA000
- | | | on on off CE000
- | | | off off on D2000
- | | | on off on D6000
- | | | off on on DA000
- | | | on on on DE000
- | | |
- | | | Location of 8 K address space for RPL
- | | | PROM. The PROM can be placed on any
- | | | 16 K boundary from C6000 to DE000.
- | | |
- | |
- | | I0 I1
- | | off off Interrupt level 9/2 *
- | | on off Interrupt level 3 (Note 1)
- | | off on Interrupt level 5 (Note 2)
- | | off off Interrupt level 7 (Note 3)
- |
- | A0 A1
- | off off A20-A23, A30-A3F *
- | off on A24-A27, A40-A4F
- | on off A50-A53, A60-A6F
- | on on A54-A57, A70-A7F
-
- SP
- off 4 Mbps *
- on 16 Mbps
-
-
- Notes:
- * denotes default switch postion
-
- (1) COM2 (if present) normally uses interrupt level 3
-
- (2) If LPT2 is configured to use interrupts, level 5 will
- normally be in use.
-
- (3) If LPT1 is configured to use interrupts, level 7 will
- normally be in use.
-