On 12/11/2015 04:35 PM, Oliver Lehmann wrote:
  Western Digital Caviar 31600 it is.
 I'm waiting for a 32Port-LA (might take up to a month). When it is
 there I'll continue debugging that issue and see what a MS-DOS does
 different from what I do. 
 MS-DOS uses the native BIOS for hard disk accesses, unless you're
 running Windows 3.1 or so and use a VxD to drive the ports directly. 
Which is perfectly fine - I just want to see what is going on the drive
interface + timings - to see what is going on differently from my
implementation.