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CD Drive DMA mode? *fixed* (I think)

J

JaiKnight

Senior member
Hello, I'm trying to figure out if I can enable DMA mode on my CD-drive. I'm using Windows 98 and have a Toshiba XM-6202B. Now, before when I had my BH6 I could swear that I could enable it, but after getting my CUSL2 and moving cables and things around it doesn't seem to want to work. Does anybody know if there's any kind of conflict?

I currently have 2 75GXPs on their own channel on an Ultra66 card, the XM-6202B hooked into Master Primary, and a Plextor 12/10/32 plugged into Secondary Master. I'd really like to get this thing working if it can, thanks!
 
there should be no trouble at all enabling DMA for it. that is a via chipset board correct? did you download the via 4 in 1 pack? if you are running the first win98 install the DMA from this pack and you should be set. if you are running win98se the DMA is built into windows, just go into device manager and enable DMA for the drives from there.
 
Azeroth is partially right. However you also have to enable it at the OS level in the System properties (Device Manager).

Thorin
 
It's the ASUS CUSL2 motherboard that I'm using right now. It seems like I have to set the Primary Master to auto-detect the drive. Otherwise if I choose CD-ROM it doesn't want to detect the primary master. It auto-detects PIO mode 4, but for Ultra DMA mode it says disable. I've tried switching this, but it keeps defaulting back to disable. I've also tried multiple times enabling it in Windows 98. Does anybody have some experience with the CUSL2 that you could share?
 
correct me if i am wrong but don't most modern bioses auto detect DMA and contiue booting? i have never had to enable DMA in the bios on my last 3-4 mobo's
 
try going to this newsgroup and posting for your trouble, it may be already discussed there-
alt.comp.periphs.mainboard.asus
 
Newsgroup Linkified

If you put CUSL2 DMA in the search box (at the top) you will probably find your answer. (I did the search but don't have time to read through the threads......it did return a number of them)

Thorin
 
I *think* I have things working now, here's what I did thanks to both hclarkjr and Thorin, I updated the BIOS to v1006 Beta 5. It didn't seem to work at first, but then another post in the newsgroup pushed it the extra edge, allowing me to enable DMA on both drives (although I want to find something to run some benchmarks just to make sure, any suggestions?).

Here is something that people with similar problems will most likely find useful:

> The information in this article applies to:
> Microsoft Windows 98
> Q235859 - DMA CD-ROM Drive Icon Does Not Appear in Windows Explorer
> -------------------------------------------------------------------------- --
> ----
>
> SYMPTOMS
> When you try to view a CD-ROM drive in Windows Explorer that requires Direct
> Memory Access (DMA), the drive may not be present, but the drive may be
> present in Device Manager. If the DMA settings are disabled in the CD-ROM
> properties, the drive may be present after you restart your computer,
> although a CD-ROM drive that supports DMA may not retain the DMA setting
> after you restart your computer.
>
> CAUSE
> This problem can occur because during enumeration of your hardware devices,
> a device conflict can occur, and this may cause Configuration Manager to
> rebalance the resources of your computer. During this arbitration process,
> the Integrated Drive Electronics (IDE) controller input/output (I/O) range
> is changed from the boot configuration to a different configuration, but the
> primary and secondary controller resources are not changed properly.
>
> RESOLUTION
> To resolve this problem, perform a forced configuration of the hard disk
> controller:
> 1. Click Start, point to Settings, click Control Panel, and then
> double-click System.
> 2. Click the Device Manager tab, and then double-click the Hard Disk
> Controllers branch to expand it.
> 3. Double-click the listed IDE controller.
> 4. Click the Resources tab, and then click to clear the Use Automatic
> Settings check box.
> 5. Change the I/O range from the current setting to a different I/O range,
> and then click OK. For example, if the setting is currently 1410-141f,
> change it to 1060-106f.
> 6. Close all open Windows, and then restart your computer.
>
> STATUS
> Microsoft has confirmed this to be a problem in Windows 98.

Once that happened and I rebooted, DMA stayed checked in both CD-Drives, thanks again for the help!
 
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