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Card setup – Impulse 7202 User Manual

Page 5

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Card

Setup

Sealevel Systems COMM+232.PCI Page

2

Card Setup

Address and IRQ selection

The COMM+232.PCI is automatically assigned I/O addresses and IRQs by
your motherboard BIOS. Only the I/O address may be modified by the user.

Adding or removing other hardware may change the assignment of I/O addresses
and IRQs.

Clock Modes

The COMM+232.PCI employs a unique clocking option that allows the end
user to select from divide by 4 and divide by 1 clocking modes. These modes are
selected at Headers E1 and E2.

To select the Baud rates commonly associated with COM: ports (i.e. 2400,
4800, 9600, 19.2, … 115.2K Bps ) place the jumper in the divide by 4 mode
(silk-screen DIV4) position.

DIV1

DIV4

DIV4

DIV1

E1

E2

Figure 1 - Clocking Mode 'Divide By 4’