Support and General Use > Hardware
H120 CF mod - enable UDMA on USB bridge
dobbley:
I have added the option to select the UDMA mode (v0.9.1). According to the data sheet this just selects the write mode, and the drive sets the read mode. It does make a difference to the read speed for me though.
It is possible that Archos did not add in the DMA specific tracks from the IDE connector when they went from ISD-200 to ISD-300. Let me know how you get on.
dreamlayers:
--- Quote from: dobbley on February 16, 2009, 02:29:10 PM ---It is possible that Archos did not add in the DMA specific tracks from the IDE connector when they went from ISD-200 to ISD-300. Let me know how you get on.
--- End quote ---
That reminds me: the schematic in the wiki shows no connection to DMA-related pins.
dobbley:
That may not mean anything as the USB 1.1 ISD-200 is used in that schematic. It has no UDMA support, and no DMA-related pins to connect to.
amiconn:
I've added some more test results to the wiki. The iAudio X5 and M5 have UDMA already enabled, so there is no need for using the tool. I couldn't test iAudio M3 because its USB VID/PID is missing in the tool.
Please add VID=0x0e21, PID=0x0500 (iAudio M3) to the tool for testing. The X5 "side port" ID in turn should be removed. This goes to the OTG chip, not the ISD300. I could add it myself, but I don't know what's needed to build the tool.
Unfortunately you seem to be right about the necessary pins for UDMA not being connected in the Recorder V1 (USB2.0). And since those signals are timing sensitive, wiring them doesn't seem to be like a good idea.
bluebrother:
I managed to get the program run on linux with only some slight changes. Haven't done speed tests yet but it seems to work fine. IMO it would be nice to have this a patch in Flyspray to get it into svn as official tool. I'll post my changes later (I'm quite busy this weekend).
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