CDR-1100 (250-1092/259-1092)         Settings          Faxback Doc. # 2398

The adapter interface card lets the CD-ROM drive and your computer
communicate with each other. Before you install the adapter interface card,
you must select its port address and IRQ channel settings.

┌─────────────────────────┐
│Setting the IRQ Channel: │
└─────────────────────────┘

The IRQ Mode Selection Jumper is set by the factory and should be left as
is. The adapter interface card Interrupt Line Selection (IRQ), found on the
adapter interface card above the edge connector, is preset to IRQ3.

             IRQ3  IRQ4  IRQ5  IRQ6 
            ┌─────┬─────┬─────┬─────┐
            │ ███ │  o  │  o  │  o  │
            │ ███ │     │     │     │
            │ ███ │  o  │  o  │  o  │
            └─────┴─────┴─────┴─────┘
               W6    W7    W8    W9

┌────────────────────────────────┐
│Setting the Port (BUS) Address: │
└────────────────────────────────┘

    300h                      310h           330h           340h       
┌────────────┐            ┌────────────┐ ┌────────────┐ ┌────────────┐ 
│  A      B  │            │  A      B  │ │  A      B  │ │  A      B  │ 
│  █████  o<─┼─ Staking   │  o  █████  │ │  █████  o  │ │  o  █████  │ 
│            │  Pin       │            │ │            │ │            │ 
│  █████  o  │            │  █████  o  │ │  o  █████  │ │  o  █████  │ 
│  C  │   D  │            │  C      D  │ │  C      D  │ │  C      D  │ 
└─────┼──────┘            └────────────┘ └────────────┘ └────────────┘ 
      └─ Jumper Block                                      (Default)   
         (plastic sleeve)

The above illustrations show the adapter interface card port address
settings. (The default port address is, 340h. The letter "h" indicates
that the value is in hexadecimal code; do not enter the "h" when entering
the value.)

The CD-ROM drive's adapter interface card port address is the memory
location where the computer looks for the drive. In most cases, the factory-
set port address (340h) works. However, if there is another device in your
computer that uses that port address, such as a network board, you must
change the CD-ROM drive's port address to prevent a conflict.

If you select a different port address, the CD-ROM software must be told
what the new port address is. 

Faxback Document # 2399 for information on setting the port address in the
CD-ROM software.

Interface Board Layout:

┌─────────────────────────────────────────────┐
│                                 ┌────┐<─────┼─ 3-pin Audio Connector
│  16-pin CD-ROM                  │ P3 │      │  (to drive)
│  Connector──────┐    P2         └────┘      │
│  (to drive)    ┌──────────────┐          ┌──┤     Audio Out
│                └──────────────┘          │  ██ ── Right Channel (RCA Jack)
│                                          └──┤
│Address                                   ┌──┤     Audio Out
│Jumper                                    │  ██ ── Left Channel (RCA Jack)
│Block─┐                                   └──┤
│      │           W W W W                    │
│    A   B         6 7 8 9                    │
│    ° ° °         ° ° ° ° <───IRQ Jumper     │
│    ° ° °         ° ° ° °     Block          │
│    C   D     IRQ 3 4 5 6                    │
└───┬┬┬┬┬┬┬┬┬┬┬┬┬┬┬┬───────┬┬┬┬┬┬┬┬┬┬┬┬┬┬┬┬┬──┘
    └┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴───────┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┘


(rjs-05/17/93)