Black Box Remote Emulator Card, 5250 manual Advanced Functions

5250 REMOTE EMULATOR CARD

•NRZ/NRZI Encoding: NRZ (Non-Return to Zero) and NRZI (Non-Return to Zero Inverted) are SDLC transmission-coding options used to keep synchronization loss between modems to a minimum. The recom-mended initial setting is NRZI. This setting must match that of the host.

•Interrupt Request Level: An IRQ (Interrupt Request) is a control signal sent by the emulator card to demand the PC’s attention. The Card supports IRQ levels 3, 4, 10, 11, and 15. If you’ve installed the Card in an 8-bit slot, use IRQ 3 or 4. If you’re running Windows, use IRQ 10, 11, or 15.

NOTE

PC adapter boards require a unique IRQ level. Make sure the 5250 Remote Emulator Card’s IRQ level is not the same as the IRQ level of any other board in the same PC.

•DMA Channel 1 and DMA Channel 3: By using DMA (Direct Memory Access) channels, the 5250 Remote Emulator Card can transmit data to the host at a higher data rate than 19,200 bps. If you select Disable, the 5250 Remote Emulator Card will not operate above 19,200 bps.

NOTE

Both channels should be enabled. Problems might occur if both are disabled.

•Base I/O Address: This is the Card’s address in the PC’s I/O memory. The address you select here must match the one you set with the Card’s DIP switches during the hardware installation (see Section 4.3). Refer to page 16 for the list of addresses you can choose from.

NOTE

PC adapter boards require a unique I/O address. Make sure the 5250 Remote Emulator Card’s I/O address is not the same as the I/O address of any other board in the same PC.

•Baud Rate: The data rate at which the Card operates, measured in bits per second. Selecting Modem automatically sets the 5250 Remote Emulator Card to match the data rate of the attached modem. When you use a null-modem cable, manually select the data rate for the communications line.

6.3 Advanced Functions

NOTE

If you selected Option 3, Terminal Emulation and PC Support/400, at the Operating Environment setup screen (see Section 6.1.2), do not change any Advanced Functions; press [ESC] and skip ahead to Section 6.4.

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