ICS Advent PCI-ICOM422/4, Руководство по эксплуатации продукта

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Manual Number: 00650-148-1 Page 10
PCI-ICOM485/4 Manual
Baud Rate Ranges
The jumpers labeled CLK X1 and CLK X4 provide means to select baud rates in either of two
ranges. When in the “X1” position, the baud rate range is up to 115,200 baud. When in the CLK
X4 position, the baud rate range is 200 to 460,800 baud.
Note: Refer to the Baud Rate Divisor Values on page 16 of the manual.
Interrupts
Please note that, in Windows NT, changes must be made to the system registry to support IRQ
sharing. The following is excerpted from “
Controlling Multiport Serial I/O Cards ” provided by
Microsoft in the MSDN library, documentid:mk:@ivt:nt40res/D15/S55FC.HTM, also available in
the WindowsNT Resource Kit. The Microsoft serial driver can be used to control many
dumb
multiport serial cards. Dumb indicates that the control includes no onboard processor. Each port
of a multiport card has a separate subkey under the HKLM\CurrentControlSet\Services\Serial subkey
in the registry. In each of these subkeys, you must add values for
DosDevices
,
Interrupt
,
InterruptStatus
,
PortAddress
, and
PortIndex
because these are not detected by the Hardware
Recognizer. (For descriptions and ranges for these values, see Regentry.hlp, the Registry help file
on the WindowsNT Workstation Resource Kit CD.)
For example, if you have a four-port PCI-ICOM485/4 (/2) card configured to use address 0xFC00,
0xFD00, 0xFD80, and 0xFE00 with an interrupt of 05, the values in the Registry are:
Serial2 subkey: Serial4 subkey:
PortAddress = REG_DWORD 0xFC00 PortAddress = REG_DWORD 0xFD80
Interrupt = REG_WORD 5 Interrupt = REG_DWORD 5
DosDevices = REG_SZ COM3 DosDevices = REG_SZ COM5
InterruptStatus = REG_DWORD 0xFC08 InterruptStatus = REG_DWORD 0xFC08
PortIndex = REG_DWORD 1 PortIndex - REG_DWORD 3
Serial3 subkey: Serial5 subkey:
PortAddress = REG_DWORD 0xFD00 PortAddress = REG_DWORD 0xFE00
Interrupt = REG_DWORD 5 Interrupt = REG_DWORD 5
DosDevices = REG_SZ COM4 Dos Devices = REG_SZ COM6
InterruptStatus = REG_DWORD 0xFCO8 InterruptStatus = REG_DWORD 0xFC08
PortIndex = REG_DWORD 2 PortIndex = REG_DWORD 4
As this example shows, the Interrupt status register, which indicates which port (s) caused an IRQ,
is located at COM A Base A8.