OS/2 Warp Boot Manager and Promise IDE conflict

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2 total messages Started by Rene Jan Michel Beumer Thu, 09 Mar 1995 21:30

#17529

Author: Rene Jan Michel Beumer
Date: Thu, 09 Mar 1995 21:30

35 lines
1885 bytes

	I have a problem using the OS/2 Warp Boot Manger and the Promise
DC4030VL-2 IDE together.  If the disk I/O handler is set to Turbo or Fast
then the PC locks up before displaying the boot manager screen.  When the
disk I/O handler is set to Normal I get the Boot Manager display and I have
no problems in getting to and using either DOS or OS/2.

	Before installing OS/2 and its Boot Manager on my PC the DC4030VL-2
performed excellently with no problems using Turbo mode so I conclude that
there are no hardware compatability problems on my PC.

	Is there a known solution to this problem so that I can use Turbo
mode and the Boot Manager ?

	My system is:

	486 DX25 AMI BIOS
	8M ram
	Sound Blaster 1.0
	Panasonic CR 563 with MKE interface card
	Zoltrix 28.8 Modem

	Drive 1 (master): Seagate ST3550A
		1M   Startable primary partition : boot manager
		150M Bootable primary Dos partion FAT c:
		150M logical FAT e:
		130M Bootable logical HPFS f:

	Drive 2 (slave): Quantum 170AT
		163M Primary partion FAT d:

	Thanks in advance.
-- 
Rene Beumer

rene@hazelg.demon.co.uk

Re: OS/2 Warp Boot Manager and Promise IDE conflict

#17528

Author: Anahata
Date: Fri, 10 Mar 1995 10:51

30 lines
2386 bytes

In article <794784640snz@hazelg.demon.co.uk>
           Rene@hazelg.demon.co.uk "Rene Jan Michel Beumer" writes:

>         I have a problem using the OS/2 Warp Boot Manger and the Promise
> DC4030VL-2 IDE together.  If the disk I/O handler is set to Turbo or Fast
> then the PC locks up before displaying the boot manager screen.

Turbo and fast modes use code in the on-board BIOS of the controller
to access the DC-4030VL via the local bus for greater DTR speed.  When
OS/2 boots, OS/2's default IBM1S506 driver takes over and expects the
card to be working like an ordinary ISA IDE controller.

You can't set fast or turbo mode in the card's BIOS and then boot OS/2
(as you have discovered). This doesn't mean you can't use the local
bus connection under OS/2, however; you can do that by installing the
Promise OS/2 driver PTI1S506.ADD instead of IBM1S506.ADD by editing
CONFIG.SYS.  I can't say for sure where you get this driver from, but
I think it's on the usual ftp sites, or there is a Promise BBS
somewhere. (I downloaded mine from Cix.)

To boot OS/2, you set the Promise controller with the speed-up modes
disabled.  As soon as the device driver loads, it switches to full-speed
operation.  Even if you don't bother with the device driver, you
still get cacheing, but the ISA interface is used instead.

-- 
Anahata
----------------------------------------------------------------
Anahata@ysyllt.demon.co.uk ====+==== anahata@cix.compulink.co.uk
----------------------------------------------------------------

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