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Please consult Chapter Two, "Hard Disk Interfaces" for specific details on connectors for the IDE and SCSI interfaces.
Figure 4-1 shows the connections that are common to all controllers with an on-board power source.
Figure 4-1: Controller Onboard Power Connector
Figure 4-2 shows connections that are common to all controllers with a 4-pin drive activity connector. A LED may be connected to either ground pin (pin 1 or pin 4) and either signal pin (pin 2 or pin 3).
Figure 4-2: Controller Drive Activity LED Connector
Table 4-1 is a general guide to the controller BIOS entry points (debug codes) on many of the listed manufacturers' products. They are not always the same and are usually only available on 8-bit RLL and MFM controllers. Note that if the BIOS address is changed on the controller, then the entry point listed below will also change (i.e.: BIOS address was C800, entry point was C800:5. Address changed to CC00, entry point changes to CC00:5).
|Table 4-1: Common BIOS Debug Format Codes|
|Adaptec||G=C800:ccc or G=C800:6|
|Scientific Micro Systems-OMTI||G=C800:6|
To use one of the above, enter the DOS Debug utility and type the corresponding code at the dash (-) prompt.
The default or most common jumpers positions are denoted by the symbol. Pin 1 and jumper 1 are indicated by an arrowhead symbol ().
This option allows the selection of the base I/O address from among the choices given. Available addresses are usually standardized to avoid conflict with other peripherals.
IRQ is short for Interrupt Request, which is the standard method used by peripherals to access the CPU. Available IRQs are usually standardized to avoid conflict with other peripherals
Controller cards with an onboard BIOS usually have an option to set the BIOS address. BIOS address is sometimes called “memory address.”
Some controllers allow the selection of the data transfer mode between PIO and DMA. Be sure that the transfer mode selected is supported by all hardware elements in the system.
Many controllers bundle other I/O options, such as floppy, parallel, and serial ports. Be sure to de-conflict any IRQ or base I/O address settings between these ports and any ports that may already exist in the system. COM refers to serial ports, and LPT refers to parallel ports.
Some jumper settings are specified as “unidentified,” “factory configured – do not alter,” or may have a dash. Information was not available on these jumpers or settings and their configuration should not be altered.
The remainder of this chapter contains information on specific hardware settings for selected controllers.
|Data bus:||16-bit ISA|
|Size:||Half-length, full-height card|
|Hard drive supported:||Up to seven Fast SCSI-2 devices|
|Floppy drives supported:||Two 360KB, 720KB, 1.2MB, 1.44MB, or 2.88MB drives|
|50-pin SCSI connector - external||J1|
|50-pin SCSI connector - internal||J2|
|34-pin cable connector - floppy drive||J3|
|4-pin power connector||J8|
|4-pin connector - drive active LED||J9|
|USER CONFIGURABLE SETTINGS|
|Floppy drive interface enabled as primary||JP2||Pins 2 & 3 closed|
|Floppy drive interface disabled||JP2||Pins 1 & 2 closed|
|Normally configure board during installation||SW1||Position 2|
|Lock configuration during installation||SW1||Position 1|
|Reset configuration||SW1||Position 3|
|Note: SW1 is set to normal unless two ISA port boards are installed on the same system. In this situation, the boards are installed sequentially. First, board 1 is installed and configured. Then, its SW1 is set to lock, and board 2 is installed and configured with its SW1 set to normal. The reset setting for SW1 is not identified.|
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