pegram@uvm-gen.UUCP (pegram r) (11/22/89)
From article <3779@netmbx.UUCP>, by hase@netmbx.UUCP (Hartmut Semken): (Stuff deleted here, edited slightly below, so inews will accept, my appologies if this shows up twice.) > You want to have an 1.44 Meg drive for the ST? > Just switch the clock frequency of the WD1772 to 16 > MHz (taken from the shifter) and attach a high density drive (like the > TEAC FD 235 HFN). > Set the seekrate for the drive to 6 Milliseconds (will become 3 with the > doubled clock). > Format high density disks with my little formatter (posted here). > A high density 5.25 inch drive is possible too. But these have no > automatic HD-recognition... > Works well for me. > hase > -- > Hartmut Semken, Lupsteiner Weg 67, 1000 Berlin 37 hase@netmbx.UUCP Very interesting! Other than resetting the seek rate and using your formatter are there any bugs that prevent general use? I.e., can all WD1772s take the doubled frequency? Does Spectre GCR work? Can you still set the seek rate low enough (12 msec for 6 actual) to accomodate 5.25" 360K (IBM) floppies? Do normal formatters work for lower densities? Or would we have to switch the 1772 clock (or the chip 8^)) all the time to do all that? Bob Pegram (pegram@griffin.uvm-gen.uvm.edu)