User manual LAVA LAVAPORT-PNP

[. . . ] The LavaPort-PnP printed circuit board 2. This user's manual If any of the above items are missing, please contact the reseller where you purchased this product. 2 Contents Quick Install ­ Windows 95/98/ME Hardware Installation Windows 95/98/ME Installation · Windows Driver Installation · Setting LavaPort Data Rates · Setting LavaPort FIFO Control · Flow Control · Com Addressing and IRQs · Setting a 230. 4 kbps Data Rate · Lava Modem Speed Set 4 5 6 6 8 10 12 14 11 16 3 Quick Install Windows 95/98/Me 1. With the power off, insert the LavaPort-PnP card into any free ISA slot. [. . . ] Windows will automatically detect the LavaPort-PnP as a new Com Port and configure it for the next available Com address and IRQ (interrupt) level. Windows will prompt you to insert the LavaPort Installation Diskette and load the file called Lava. inf. This file is located in either the root or the Win95 subdirectory of the LavaPort diskette, and on some PCs you may have to manually type in A:\Win95 when prompted for the LavaPort installation diskette. After the necessary files have been copied, Windows will complete the full installation of the LavaPort-PnP. The following describes how you may custom configure the LavaPort-PnP for your personal needs. 6 3. Click on the Start button, then choose Settings, Control Panel, System, Device Manager. Click on Ports and select the LavaPort-650 ISA. Click Properties. The following screen will appear: 7 Setting LavaPort Data Rates 8 The data rate of the LavaPort may be set using the Bits per Second pull down menu. Please note that this menu will also appear when setting the "Port Properties" in any communications application, and may have to be set independently of your Control Panel settings. Control Panel settings may not necessarily be linked to those of your Communications Application. For optimum performance, always verify that your LavaPort is set to the maximum speed supported by your modem, and that both speed settings are the same. For Internet users: Port speeds in Dial-Up Networking must be set independently of speed settings in Control Panel. Many users may find it easier to use the Lava Modem Speed Set Utility included in the Utils subdirectory of the LavaPort diskette. 9 Setting LavaPort FIFO Control 10 The LavaPort-PnP incorporates a 16650 UART chip with a 32-byte FIFO (first-in-first-out) buffer. The FIFO control tabs set the buffer "trigger" levels. When the buffer is filled to its trigger level with the selected number of bytes, the CPU will be interrupted and asked to either reload the buffer (for transmission), or retrieve data from the buffer (for reception). Most efficient data transmission occurs when the CPU is interrupted infrequently. For each interrupt, the CPU can then service the buffer with larger data blocks: during transmission, it can place a large burst of data into the buffer, and during reception it can retrieve a large block from the buffer and then continue multi-tasking. Ideally therefore, Receive triggers should be set as high as possible and Transmit triggers as low as possible. However, if the Transmit trigger levels are set too low, or too Receive triggers too high, and the CPU is busy when an interrupt is called by the LavaPort, a short period of inactivity may occur between the port and the modem. This will reduce effective transmission/reception speeds. Optimum buffer settings are dependent on your modem speed, your CPU speed, and the amount of multi-tasking that occurs while online. [. . . ] If your modem is not found by the Lava Modem Speed Set utility, please check the Tech Support area of Lava's Web site for an update: www. lavalink. com. 16 To install the Lava Modem Speed Set utility on your hard drive, insert the LavaPort diskette into your floppy drive, click Start, Run and type A:\Utils\Setup. After installation, the program will attempt to identify your modem. When your modem is found, select it and the following screen will appear: Note that AutoBaud refers to the default speed of the modem (usually 115. 2 kbps), and is the speed at which many ISDN modem configuration programs operate. [. . . ]