6 Dec
2015
6 Dec
'15
1:10 p.m.
On 12/06/2015 02:57 PM, Oliver Lehmann wrote:
Hi,
I've built a Harddisk-Controller-Emulator for my system
which accesses
a IDE (PATA) harddisk with an ATMega in PIO mode. It works
like a charm
except for one WD harddisk. The harddisk itself works fine
with MS-DOS
6.22 and FreeBSD but refuses to work with my ATMega.
On reading or writing a sector, right after the command is
issued, the
error bit is set in the status register, and the error
register indicates
an ABRT.
I don't have any specific knowledge of this, but it has to
be a timing problem.
Something about the timing of the command signals is just
different enough that the drive thinks this is wrong. Sorry
I can't give more specific help.
Jon