WDCIDEOS.ADD

WDCIDEOS.ADD is a hard disk driver for use under OS/2 2.1. Its main benefit is its ability to transfer data from the hard disk in either a Block Mode PIO fashion, EISA type 'B' DMA fashion, or PCI type 'F' fashion.

Syntax

BASEDEV=IBM1S506.ADD

BASEDEV=WDCIDE.ADD /A:0 /DT:F /DC:6 /A:1 /DT:B /DC:7

Parameters

1. Adapter number: /A:0 OR 1 - Adapter 0 or 1
2. DMA channel: /DC:6 OR 7 OR 5 OR 3 - DMA Channel 3, 5, 6, OR 7

   This switch is required to enable DMA transfers. Each adapter will require its own DMA channel assignment. When using Channel 3, make sure it is set up to run in 16 bit mode.

3. DMA type: /DT:F OR B - DMA Type F OR B transfers

   This switch is optional. When this switch is omitted, the driver will auto-detect the machine type. Type 'B' will be used for EISA platforms and type 'F' for PCI/ISA based systems.

4. DMA scatter gather: /DSGP:400 - DMA Scatter Gather Base port

   This driver automatically turns on the Scatter Gather function on PCI/EISA systems and defaults to 400H base port. For PCI/ISA systems, this function is not enabled automatically. For these systems, you will need to use this switch and provide the correct base port address to enable the Scatter Gather function. Unless you are certain that Scatter Gather function is properly supported in the PCI H/W, do not turn on this option as it will either hang the system or will corrupt the data.

5. DMA scatter gather disable: /!DSG

   Because this driver automatically does Scatter Gather on PCI/EISA systems, this switch will allow you to disable the function on these systems.

6. Verbose mode: /V

   This displays controller status and drive geometry information, as well as drive transfer modes during OS/2 initialization at uptime.

7. Base port address: /P:120 or /PORT:120

   Overrides the default base port address for this adapter. Ports assigned in this case would be (120-127) and (326). The default port addresses for Adapter 0 is (1F0) and for Adapter 1 is (170).

8. Interrupt number: (dec) /IRQ:11

   Overrides the default IRQ number for this adapter. The default IRQ address for Adapter 0 is 14 and for Adapter 1 is 15.

Links

• WDCIDEOS_1-01.zip - 1.01 (1995-01-12)