Here’s the situation:
I’m running Windows ME (and please, let’s not debate WinME: good or bad: It supports DMA and that’s all that’s relevant for this) and I just got a Sony DRU500-A DVD-RW for a birthday/Hannukah present.
It suggests that DMA be enabled for best performance.
I go to my control panel, go to system, go to Device Manger and check. NONE of my IDE devices have DMA boxes listed (the CD-RW, the DVD-RW or the HDDs). It’s not that they’re ghosted, they’re not even listed. I know for a fact that the MB is
I check the System devices under Device Manager and sure enough, there’s a Direct Memory Access Controller device. I remove it, reboot and it reinstalls.
Still no check-boxes.
I go to the MB manufacturer’ page (It’s an Intel D850MV) and update all my bios/device drivers. No luck (but in the BIOS it shows that all devices have DMA enabled.
Back to Windows, I check an app that came with the MB, “Intel Application Accelerator” and it shows the following (and I’m sorry to say that I’m out of my depth at this point). For each device, I get something like:
DMA SW Mode Support: Not Supported
DMA MW Mode Support: 0 - 1 - 2
UDMA Mode Support: 0 - 1 - 2
Current Transfer Mode: UDMA
Transfer Mode Limit: No Limit
I have no idea what most of this means.
Note that the last one “Transfer Mode Limit” is the only one I can change and I can switch it to a bunch of different DMA modes or UDMA modes. I’ve tried switching it to various DMA or UDMA modes and I still don’t get the check-box. And at this point I’m not sure I need it. I mean, per the utility, everything’s fine.
Is everything fine? Do I need that DMA check box, if this other utility says it’s working? Any ideas what (if anything) I can/should do? I’m stumped.