The first RocketPort or RocketPort RA card requires a 68-byte contiguous block of I/O addresses, starting at one of the following: 0x100h, 0x140h, 0x180h, 0x200h, 0x240h, 0x280h, 0x300h, 0x340h, 0x380h. The second, third, and fourth RocketPort cards require only a 64-byte contiguous block of I/O addresses, starting at one of the above address ranges. The I/O address range used by any of the RocketPort cards must not conflict with any other cards in the system, including other RocketPort cards. The starting range of the I/O ports used by each card must match with the I/O address specified in /boot/device.hints.
Since the first RocketPort uses 68 I/O addresses, if the first card is set to use an I/O block starting at 0x100, it will occupy the I/O ports between 0x100 and 0x143. This means that the second, third, or fourth RocketPort board may not use the block of addresses starting at 0x140, since the first three I/O addresses of that range are used by the first board. This is an important point to keep in mind.
If you have two ISA cards, one installed at 0x100 and the second installed at 0x180, then you should add the following to /boot/device.hints:
The configuration of the RocketPort cards is done via the set of 8 DIP switches, labeled SW1 on the RocketPort card:
| 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
| Unused| Card | I/O Port Block|
DIP switches 7 and 8 are unused, and must be left on.
DIP switches 6 and 5 identify the card number of each RocketPort card. The first card installed in the system must have its DIP switches set as card number one; the second card installed in the system must have its DIP switches set as card number two; and so on. As shipped from the factory, DIP switches 6 and 5 are both on by default, indicating that this is the first card installed on the system:
On On First Card
On Off Second Card
Off On Third Card
Off Off Fourth Card
DIP switches 4, 3, 2, and 1 indicate the I/O address range used by the first RocketPort card. If there are more than one RocketPort cards installed in a system, the second, third and fourth RocketPort cards must also be set to the I/O address range used by the first RocketPort card; all cards must have these DIP switches set identically for proper operation. As shipped from the factory, DIP switch 4 is on, and switches 3, 2, and 1 are off by default, indicating an I/O address range used by the first card which starts at 0x180 and extends to 0x1C3.
DIP Switches I/O Address Range
4 3 2 1Used by the First Card
On Off On Off 100-143
On Off Off On 140-183
On Off Off Off 180-1C3
Off On On Off 200-243
Off On Off On 240-283
Off On Off Off 280-2C3
Off Off On Off 300-343
Off Off Off On 340-383
Off Off Off Off 380-3C3