English Amiga Board - View Single Post - At wit's end with Accelerated A500 + SCRAM500 SCSI

DrBong · 26 January 2020, 21:50

Initially I thought it might be a MaxTransfer problem, but then that doesn't fit with your SCSI hard drive working on 68000 and not 68030. Delving into it a bit further, perhaps it's your hard drive's mask value. According to the VXL*30 manual:

"If you have a DMA disk interface (such as CBM's 590 or GVP's Series II), memory mapped high will create an access problem. Change the mask value to 0x00fffffe (see your drive's Rigid Disk Block prep software and documentation) else map the memory low."

Hopefully that will do the trick if nothing else suggested above does.....

26 January 2020, 21:50	#5
DrBong HOL / AMR Team Member Join Date: Dec 2001 Location: Australia Posts: 2,632	Initially I thought it might be a MaxTransfer problem, but then that doesn't fit with your SCSI hard drive working on 68000 and not 68030. Delving into it a bit further, perhaps it's your hard drive's mask value. According to the VXL30 manual: "If you have a DMA disk interface (such as CBM's 590 or GVP's Series II), memory mapped high will create an access problem. Change the mask value to* 0x00fffffe (see your drive's Rigid Disk Block prep software and documentation) else map the memory low." Hopefully that will do the trick if nothing else suggested above does.....