From: williams@herky.cs.uiowa.edu (Kent Williams)
Subject: IN2000 Native Driver Support Exists!
Date: Thu, 7 Jan 1993 20:33:53 GMT
Organization: University of Iowa, Iowa City, IA, USA

The good news: You can obtain a Native Driver from Columbia Data Products. It
appears to work fine, at least for my setup: 2.1 Beta, 1 SCSI Disk.  Disk
access is noticeably snappier.

The bad news: You have to shell out 65$ to get the driver disk+the bios update.
At some point I'm going to try hooking up a CD-ROM and see how that works.

Always claims to be negotiating to get the OS/2 drivers from Columbia and
selling them themselves.  I'll believe it when I see it.

Also, I noticed one thing strange -- disk access no longer seems to trip
up serial communications but other things do -- notable, scrolling a OS/2
terminal session freezes my COM program, and then the COM program get's
a bunch of line errors.

For all who are into Excruciating Detail, here is the one page of documentation
that came with the driver.  I'm going to notate it with my comments; they will
appear on lines beginning with !!

Introduction

This document pertains to the Columbia Data Products SST IV Always
IN-2000 Adapter Device Driver (ADD) for IBM OS/2 2.0.  This Adapter
Device Driver will provide increased functionality and performance
when using the Allways IN-2000 with OS/2 2.0.
!! And apparently 2.1 also.

The SST IV Always ADD for IBM OS/2 2.0 is a driver that allows the IBM
OS/2 2.0 SCSI manager to communicate with the Always IN-2000 SCSI host
adapter.  As a result, any program or device driver that uses the OS/2
SCSI manager should work with the Always IN-2000.  The original IBM
OS/2.0 release included device drivers that support 32-bit SCSI hard
disk access and Toshiba/IBM CD-ROM drives in the data and audio play
modes.  Additional drivers are becoming available that support more
CD-ROM drives in addition to removable media SCSI devices such as
SyQuest, Bernoulli, and magneto-optical drives.

Configurating the IN-2000

The SST IV Always IN-2000 ADD for IBM OS/2 2.0 requires that the
IN-2000 board have an EPROM VCN 1-03 chip or hier and Serial PROM 2.7
or higher.

The IN-2000 may be set to I/O base port 110h, 200h, or 220h, and to
any interrupt from 10 to 15.  The default settings are I/O base port
220h and interrupt 15.  Please consult the manual included with your
IN-2000 for information on changing these settings.

When using the Always ADD, the IN-2000 ROM must be enabled, even if
you are booting from an IDE ESDI, ST-506 or other non-IN-2000
controlled hard disk.

Configuring the SCSI Devices

If you want to boot from OS/2 on a SCSI device, the hard drive must be
set to target ID 0.  The Always IN-2000 must be set to target ID 7.
Other SCSI devices may be set to any target ID from 1 to 6.  Please
consult the manual for your SCSI device to obtain information on
changing the SCSI target ID.

Installing OS/2 2.0

If you have not already installed OS/2 2.0, go ahead and do so.  OS/2
2.0 will install properly by using the default INT 13h ADD.

After installing OS/2 2.0, install the "enhanced" SST IV Always ADD by
either:

1. Select the "OS/2 System" folder from the workplace shell; then
select the "System Setup" icon; then select "device driver install."

2. Type ddinstal A: or ddinstal B: from the OS/2 command prompt.

!! Note -- they didn't ask me if I wanted 5.25" or 3.5" diskette, and
!! ended up receiving a 5.25".  If you have to have 3.5", you better
!! make sure Sheila gets that.
!! They also don't mention that you don't need the IBM INT13 driver
!! anymore, unless you have more than one real-mode-only adapter.  I'm
!! not sure if it hurts anything to leave the INT13 driver loaded, but
!! commented out the BASEDEV line just to be sure.

Advantages of the OS/2 2.0 ADD

The SST IV Always ADD for OS/2 2.0 offers several advantages over the
"standard" OS/2 2.0 Int 13h ADD.  These advantages include:

* The SST IV ADD supports up to seven SCSI disks.

* The SST IV ADD greatly increases SCSI disk performance in OS/2 2.0.

* The SST IV ADD incorporates the scatter/gather feature and
multitasking in OS/2; the INT 13h ADD does not.

* The SST IV ADD supports, vioa the IBM drivers provided with OS/2
2.0:

	* SCSI CD-ROM drives via OS2CDROM.DMD
	* SCSI Tape drives via OS2SCSI.DMD
	* ASPI for OS/2 2.0 via OS2ASPI.DMD
	* any other device driver or application that uses the IBM SCSI or
      ASPI manager.

Columbia Data Products Inc. P.O. Box 142584, Altamonte Springs, FL 32714-0084
Voice: (407) 869-6700 * Fax: (407) 862-4725 * BBS (407) 862-4724

--
Kent Williams -- williams@cs.uiowa.edu Work(335-4496) Home(338-6053)
"You, Varlet! Why so blithe?" -- from "Shreck" by William Steig


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