9 Dec
2015
9 Dec
'15
10:23 a.m.
Since identify and read buffer return consistent data, timing would appear to be ok. I
would change the parameters used for read. iIRC you used chs =0/0/0. Try chs=1/1/1
Joe
On Dec 8, 2015, at 4:38 PM, Oliver Lehmann <lehmann
at ans-netz.de> wrote:
Oliver Lehmann <lehmann at ans-netz.de> wrote:
Oliver Lehmann <lehmann at ans-netz.de>
wrote:
I just changed the "READ" command to a "FORMAT" command and now the
drive wants
me to fill up the sector buffer (which I don't do) but at least the command is
accepted and does not immediatly return ERR.... what the heck?
Read Buffer also works after the read-command-error - but now idea if the buffer
contains anything which could help me here....
7a424c0c0000100000e158023f001000
00000e004457572d3254393839313032
31392034202020200300000116003332
312e5536333744572043434131333036
48302020202020202020202020202020
20202020202020202020202020201080
0000002f000080020000020000000000
0000000000000001406b300000000704
030078007800a0007800000000000000
00000000000000000000000000000000
...
00000000000000000000000000000000
00000000000000000000000000007800
No idea what this gives me.... the contents are reproducable
Toby Thain <toby at telegraphics.com.au>
wrote:
But - if the flanks or the timing would not be right - how could the IDENTIFY
command work without any error? If the flanks would not be straight or /RD is
not active long enough or whatever - shouldnt return the IDENTIFY an error as
well? I'd say so...... > On 2015-12-08 2:16 AM, Oliver Lehmann wrote:
> Hi Warner, hi Brad,
> ...
> I don't intend to use this harddrive anyway, I just fear that I made a
> misstake in my circuit or the code and others intending to use my
> emulator also experiencing problems with their drives too.
Well, it's certainly interesting. I'm curious now whether your WDC AC31600H would
work with my PIC code. :)
I checked it now with an old 486-DX50 EISA+VLB board (rare combination ;))
with a Goldstar Prime 2 and an Acer M5105 ISA Controller. Both detect and
work fine with this harddisk. No idea what mode they work but I guess it
is PIO 0-whatever only - no DMA involved....
Damn this drives me nuts.... either I accept it, or I get a logic analyzer
but the cost of such a thing..... :/