kushmer@bnlux0.bnl.gov (christopher kushmerick) (02/08/91)
I have a data trranslation card, dt2851, a frame grabber with 512 K byte buffers on board. The manual says that I can select the portion of address space that this will occupy. The factory configured base address is $A00000 (Thats right, 5 zeros). This ram is probably dual ported because the manual says that I can read/write it at any time ie with out worrying about conflicts with the frame grabber hardware. Now the questions: How many address lines are there on the AT bus? Does the 80286 not have 20 address lines? What is conffusing me is how I could ever read/write to addresses in the range of $A00000. In theory this would be segment $A0000. But turbo pascal 5.0 and turbo debugger both seem to only accept address in the range of roughly $FFF0 (For the segment). Any infomation on what I am worrying about is appreciated. Is there still a ibm.pc.hardware group? -- Chris Kushmerick kciremhsuK sirhC kushmer@bnlux0.bnl.gov <===Try this one first kushmerick@pofvax.sunysb.edu