CompuServe Messages

To ICD: HI…..I purchased AdSpeed at the show in Toronto in November. Just this past week I got a 52M SCSI GVP Impact Series II…. When AdSpeed is running at 14MHz, it screws up the hard drive (I get a series of "Error reading drive DH0:" and when it turn it off, e(the AdSPeed) everything works fine. I know AdSpeed works by caching FAST RAM and not touching chip ram. The setup utility (FAAASTPREP) that comes with the GVP HD lets you select the type of memory that buffers are allocated from (Either, Fast, or Chip) as well as an address mask to specify memory range that DMA transfers can use. I tried to phone on Friday but I was too late…so I figure CServe is just as efficient…. So, I set it up so that CHIP memory only was used for the drive's buffers and restricted all SCSI data transfers to those regions of memory that do support DMA (CHIP) by setting the mountlist mask-parameter to 0x1FFFFF (chip memory only) from 0xFFFFFE. The above I've basically copied out of the AdSpeed and GVP manuals. WHen I did this, everything worked fine. However, using DPERF2, the transfer rates were brutally slow (higher buffers made no difference at all) …something on the order of 80K/s. When AdSpeed is off and I let my harddrive use FAST RAM and reset the mask back to 0xFFFFFE, and use 32K buffers, I get 800K/s. Hopefully, you can understand what I'm trying to convey. Personally, I'd rather have the faster transfer rates than the speed increase (which has been marvelous up to now)…that's if I had to choose at gunpoint. Ideally, I'd like to run AdSpeed AND have the HD work no problems with the high data transfer rate. Help? Warren Briggs