EISA Configuration Settings The BusTek BT-742A Host Adapter fully supports the EISA automatic configuration facility, and is operational with most computers using the default settings in the BT-742A configuration diskette supplied with the board. The host adapter configuration options will need to be changed if conflicting port assignments or memory allocation is encountered. Every BusTek EISA controller comes with a floppy diskette which contains the BusTek configuration file (!BUS4201.CFG). Before starting, perform the following steps: 1. Copy the BusTek !BUS4201.CFG file onto the configuration floppy diskette provided with your host system computer. 2. Place the configuration floppy diskette into your system floppy drive and type "CF" (or name of your configuration program). 3. Follow the directions on your screen to select the configure computer option. An "Auto Added" prompt will advise you that the BT-742A Host Adapter has been installed into a previously empty EISA slot. 4. Follow the directions on your screen to select the BT-742A board. The default settings for configuration options as shown on the screen are illustrated in Figure 3. Select the desired options by moving the cursor to the field desired and press the return key. A submenu for the options selected will appear. To set the option in the submenu, use the cursor keys to highlight the selection, then press the return key. Before operating the host adapter, verify that the configuration settings have been set according to the target system's operating requirements. The figures that follow show the settings for option submenus. NOTE: For details on greater than 1 GB support, refer to the heading, "Disk Drive Capacity," later in this section. Host I/O Port Address: This option selects the starting address of the block of four I/O ports required by the BusTek BT-742A Host Adapter board. The default starting address is 330h. Host Interrupt Request: This option selects the host interrupt channel. The default setting is channel 11. Host BIOS (16K Bytes) Address: This option selects the block of address space reserved for the BusTek BT-742A BIOS starting address. The default setting is 0DC000h. If more than one host adapter is installed in the same system, only one may have the BIOS enabled. The BIOS on each of the additional adapters must be disabled. ISA DMA Channel Emulation: The default setting is no DMA enabled. The DMA channel which is reported to the host computer at the Inquire Configuration command is set by this option. ISA DMA Channel Emulation ( )DMA Channel 5 - default ( )DMA Channel 6 ( )DMA Channel 7 ( )No DMA Channel Host-Adapter SCSI ID.: The as-shipped (default) SCSI ID is 7. The BusTek BIOS requires that your SCSI drives be configured for SCSI ID 0. This requirement is only important if you intend to boot your system from the BT-742A Host Adapter. SCSI Parity: The default setting is enabled. Setting this option to "Disable" disables the SCSI bus parity. Disk Drive Capacity: By default the Disk < 1 GB or SCO UNIX op-tion is turned on. However, you can enable the > 1 GB support by en-abling the Disk > 1 GB and not SCO UNIX option. Disk Drive Capacity ( )Disk < 1 GB or SCO UNIX - default ( )Disk > 1 GB and not SCO UNIX After you have enabled the > 1 GB support on revision 'G' and above, the host adapter can support up to seven SCSI disk drives with each drive up to 8 GB in capacity. With the addition of this feature, the "SCSI Auto Sense" parameter has been removed from the EISA configuration. Example - If a disk drive is more than 1 GB but less than 2 GB in capacity, you should set the host adapter for >1 GB support. If you were to run FDISK, it will display half of the cylinder count of the total drive capacity because now the disk is formatted as 2 MB per cylinder. The following table summarizes the translation scheme used with the board. < 1 GB >1 GB > 2 GB > 4 GB Sectors Per S=32 32 32 63 Track Number H=64 128 256 256 of Heads Capacity Per C=1 MB 2 MB 4 MB 8 MB Cylinder SCO UNIX Limitations - Disk capacity cannot exceed 1 GB due to the SCSI device driver that is built into SCO UNIX. Novell Limitations - Novell NetWare will support greater than 1 GB on the disk drive if the BIOS on the host adapter is disabled, and you are booting from another device. This enables NetWare to use the entire disk drive as a NetWare volume. If the BIOS is enabled and you are booting from a DOS partition, then there is a 1 GB limit. This limitation is due to the fixed parameters in the NetWare SCSI device driver. Adapter Initiate Synchronous Negotiation: The default setting is disabled. This mode assumes that a SCSI target device connected to the BT-742A will initiate the synchronous negotiation. Some target devices mandate that they must initiate the synchronous transfer sequence. Such devices may fail to respond to commands from the BT-742A if a synchronous negotiation occurs unexpectedly. Conversely, other target devices may expect an initiator to begin the synchronous negotiation sequence. If this class of SCSI target devices is connected to the BT-742A, the option may be enabled to allow the host adapter board to initiate the negotiation for a synchronous data transfer with a selected SCSI target device. Host Interrupt Request ( )INT11 Edge - default ( )INT10 Edge ( )INT14 Edge ( )INT15 Edge ( )INT9 Edge ( )INT12 Edge ( )Disable INT ( )INT11 Level ( )INT10 Level ( )INT14 Level ( )INT15 Level ( )INT9 Level ( )INT12 Level Floppy Subsystem: The default setting for this option is for the floppy drive to be disabled. When the floppy subsystem is disabled, the floppy disk controller will disregard read and write commands. When the floppy subsystem is enabled, the floppy disk controller is allowed to respond to read or write requests. Setting the floppy subsystem for Primary produces a primary floppy disk address of 3FX. The secondary address of 37X is set when the secondary option is selected. Hard Disk Initialization This section describes the system set-up, initialization, partitioning and formatting of hard disk drives used with the BusTek BT-742A Host Adapter. These procedures will erase all data on your disk drives. Before following these procedures make sure that all necessary data is backed up on another drive. Setup, Initialization and Partitioning Procedure To perform setup, initialization, and partitioning, proceed as follows: 1. After plugging in, connecting and configuring your host adapter (see the previous parts of this section), reset and reboot your system. 2. Insert the system diagnostic diskette in the drive; or execute the host's internal diagnostic/setup program. See your particular system's installation instructions. 3. In accordance with the menu that appears on the system monitor, run SETUP and configure the host CMOS RAM options. Set the hard disk option to "No Hard Drive Installed". Steps 4 through 8 below may not be necessary if your SCSI hard disk drive has already been formatted. 4. Re-boot the host system and insert the MS-DOS diskette containing the DEBUG program. 5. After the MS-DOS prompt, type the following for low-level format: 6. Then, perform the following steps on your screen monitor to configure and perform a low-level format on attached devices: A) The "SCSI Fixed Disk Format Utility" will appear on the screen. Enter "1" to view the attached devices, then press the return key. B) A list of all attached drives will then be shown under the option prompt. Press the "2" key, until the drive to be formatted is the current drive. C) Press "3" then press the return key, to format the drive. The following prompt will be shown: All data on this drive will be lost! Proceed with low level formatting? (Y/N) __ Enter "Y" to proceed with low level formatting and follow instructions as they appear on the screen. D) The system will format the SCSI drive selected. When the format is finished, press any key to go back to the main menu shown in step 6A above. Enter "4" to verify the drive, then press the return key. The following prompt will be shown: All data on this drive will be verified. and bad data areas will be reassigned. Proceed with low level verification? (Y/N) __ Enter "Y" to proceed with verification. E) When the verification is finished, press any key to go back to the main menu shown in step 6A above. Enter "5" to exit to DOS, then press the return key. Steps 7 and 8 below may not be necessary if the operating system to be installed is not MS/DOS. 7. Run the MS-DOS FDISK program to partition the disk for the number of cylinders to be used by DOS. The following steps are recommended for users who are not familiar with the MS-DOS FDISK program. See your MS/DOS manual for information on the FDISK command. A) Enter "fdisk", followed by the return key. B) Enter "1", followed by the return key to create a DOS partition. C) Enter "1", followed by the return key to create a primary DOS partition. D) Enter "Y", followed by the return key to create a primary DOS drive partition with the maximum size. When the partitioning is done (indicated by another prompt), press any key to return to DOS. 8. Install MS-DOS by running the FORMAT program as instructed by MS-DOS normal installation procedures. The next steps are recommended for operators who are not familiar with the MS-DOS FORMAT program. A) Enter any legal file name to label the volume just created. Refer to your system's operator's manual for more details on MS-DOS format procedures. This concludes the BusTek BT-742A Host Adapter PCB installation and software installation procedures. Warranty Information If damage to the board has occurred, return it in the protective envelope with this manual to your BusTek board supplier. The shipping agent should also be notified if the unit has been damaged during shipment.