About Device Definition

Use this view of the Device Definition window to view, modify, create, or delete a custom device definition.

For more information about the general subject of device definitions and managing them, see About Device Definition.

Custom Device Definition

SCO Merge allows DOS and Windows to use custom hardware devices such as sound boards, scanners, and LAN cards that are not automatically made available as part of SCO Merge. SCO Merge can use these devices only by communicating with them directly, without UNIX intervention. You must directly attach all such devices.

Note: SCO Merge does not support direct attachment of hardware devices that are compatible with Plug-and-Play.
Note: Only direct attach of IO ports is supported on UnixWare systems.

Custom devices defined here are available for attachment in the Devices view of the Personal Merge Session Configuration window.

To add a new custom device:

Click on the New button to create a new direct attach token name for the device.
Fill in the required information as described in the following section.
Alternatively, you can select an existing custom device definition from the list of tokens, modify the settings appropriately, and then save the resulting definition under a new token name.

Custom Device Configuration

You will need to configure all of the hardware parameters that apply to your device.

In the Configuration text box, select the hardware parameter that you want to modify from the following list:

IRQ: If the device communicates through an Interrupt Request (IRQ). See IRQ Attachment for the remaining device definition steps.
DMA: If the device communicates through a Direct Memory Access (DMA) channel. See DMA Attachment for the remaining device definition steps.
IO Port: If the device communicates through a range of IO port addresses. See IO Port or Memory Mapped IO Attachment for the remaining device definition steps.
Memory Mapped IO: If the device communicates through memory mapped IO address range. See IO Port or Memory Mapped IO Attachment for the remaining device definition steps.
UMB: If the device communicates through an Upper Memory Block (UMB) address range. See UMB Attachment for the remaining device definition steps.

IRQ Attachment

Note: Direct attach of IRQ is not supported on UnixWare systems.

Follow these steps to specify IRQ for a custom device:

Click on the Add button, and enter the physical IRQ this device is to use. Consult the manufacturer's documentation for the physical IRQ to use. Also, see ``Defining a direct attach custom device'' in the SCO Merge User's Guide for a list of available IRQ numbers.
If you make a mistake, click on the incorrect entry to highlight it, and then click on the Remove button to delete the incorrect entry. Then, reenter the correct IRQ as described in step 1.
If this device must use a physical IRQ that has been assigned to another device, you can remap the IRQ to a virtual IRQ value by clicking on the Remap button.
A dialog box appears in which you can enter a the virtual IRQ value. The value can be 0, 2 through 7, 9 through 13, or 15. You cannot choose a virtual IRQ value that another device is already using as a physical or virtual IRQ at the same time as this device.
If virtual mapping has been established for the device and you want to delete it, click on the Unmap button.

DMA Attachment

Note: Direct attach of DMA is not supported on UnixWare systems.

Follow these steps to specify DMA for a custom device:

Click on the Add button, and enter the DMA channel the device needs to use. Valid DMA values are 0 through 7.
If you make a mistake, click on the incorrect entry to highlight it, and then click Remove. Then, reenter the correct DMA value as described in step 1.
If this device must use a DMA channel that another device is using, you can remap the DMA channel to a virtual DMA channel by clicking on the Remap button.
A dialog box appears in which you can enter a virtual DMA value. The value can be from 0 through 7. You cannot choose a virtual DMA channel that another device is already using as a physical or virtual DMA channel at the same time as this device.
If virtual mapping has been established for the device and you want to delete it, click on the Unmap button.

IO Port or Memory Mapped IO Attachment

Note: Only direct attach of IO ports is supported on UnixWare systems. Direct attach of Memory Mapped IO is not supported on UnixWare systems.

Follow these steps to specify IO Port or Memory Mapped IO for a custom device:

Click on the Add button to bring up a window in which you can enter the address range. The address is given in hexadecimal notation, and is typically in the range 0 - 3ff(hex).

Note: For a Memory Mapped I/O device, the range must start on a 4K boundary and be a multiple of 4K.

If you make a mistake, click on the incorrect entry to highlight it, and then click Remove. Then, enter the correct value as described in step 1.
If this device must use an address range that another device is using, you can remap the address to a virtual address by clicking on the Remap button.
A dialog box appears in which you can enter the virtual address range. The address is given in hexadecimal notation, and is typically in the range 0 - 3ff(hex). You cannot choose a virtual address that another device is already using as a physical or virtual address at the same time as this device.
If virtual mapping has been established for the device and you want to delete it, click on the Unmap button.

WARNING: To use a device that communicates through Memory Mapped IO, you must first modify your default dos and win configurations to attach this device, and then make new DOS images. See ``Making new DOS images'' for instructions.

UMB Attachment

Follow these steps to specify UMB for a custom device:

Click on the Add button, and enter the address range to use for the device. The address is given in hexadecimal notation, and is typically in the range 0 - 3ff(hex).
If you make a mistake, click on the incorrect entry to highlight it, and then click Remove. Then, enter the correct address range as described above.