I/O Addresses Not Available with Future Domain 850 Series (132061)

SYMPTOMS

When you are configuring a Future Domain SCSI controller in Device Manager, you may not be able to configure the controller to use the E800h-E9FFh or EA00h-EBFFh I/O address range, even though you can configure the controller itself to use either of these ranges. This problem is known to occur with the following Future Domain controllers:

TMC-850
TMC-850M
TMC-850MER
TMC-850MEX

CAUSE

This problem occurs because the Windows 95 SCSI.INF file and hardware detection routine do not distinguish between the Future Domain 850- and 860-series controllers. Although the 850-series controllers can be configured to use the I/O addresses listed above, the 860-series controllers cannot.

RESOLUTION

The Future Domain 850-series SCSI controllers cannot be configured to use the E800h-E9FFh or EA00h-EBFFh I/O address range when you are using the Windows 95 protected-mode drivers. If you are using protected-mode drivers, use one of the following valid address ranges for the controller:

C800h-C9FFh
CA00h-CBFFh
CE00h-CFFFh
DE00h-DFFFh

If you must use the E800h-E9FFh or EA00h-EBFFh I/O address range, use the real-mode drivers included with the controller instead of the Windows 95 protected-mode drivers.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Windows 95. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.