What are these jumpers on my CD-ROM drive? \ VOGONS

What are these jumpers on my CD-ROM drive?

Topic actions

Post a reply

First post, by Thrackerzod

Posted on 2021-01-24, 13:57

Thrackerzod Offline

Rank Newbie

Rank: Newbie
Posts: 9
Joined: 2021-01-24, 13:50
Location: USA

I have an Acer (Aopen) CD940E/AKU 40X drive that I was getting ready to install and I noticed an extra set of jumpers on the back marked T, R, and Turbo. I don't recall ever seeing those on a drive before and I have not been able to find anything online telling what they do. I thought if there were any place I could find out this would be it. It is currently set to T, does anyone know what they are for. If I set it to Turbo will it spin really fast and explode my discs? 😆

Reply 1 of 3, by fosterwj03

Posted on 2021-01-24, 14:48

fosterwj03 Offline

Rank Member

Rank: Member
Posts: 426
Joined: 2020-10-10, 01:10

Per this web page for a related drive, it looks like it disables the drive's Ultra DMA mode:

http://www.synthmind.com/aopen_cd.htm

If your motherboard or drive controller can handle UDMA, you should remove the jumper and test it out.

Nice looking drive.

Reply 2 of 3, by konc

Posted on 2021-01-24, 14:59

konc Offline

Rank l33t

Rank: l33t
Posts: 2236
Joined: 2013-01-14, 15:09
Location: Greece

fosterwj03 is right, you remove jumper T to enable UDMA which is disabled by default. Also according to some review found in an old magazine on google books about a similar drive, don't bother about the other two

Reply 3 of 3, by Thrackerzod

Posted on 2021-01-24, 16:50

Thrackerzod Offline

Rank Newbie

Rank: Newbie
Posts: 9
Joined: 2021-01-24, 13:50
Location: USA

Thanks! I'm using it with an ASUS P/I-P55TVP4 motherboard which doesn't support UDMA so I suppose there's no point changing it, but it's good to know if I ever use it in a newer system.

Go to top of page Go to top of page

Back to General Old Hardware

Main menu

Common searches