Reverse-engineering WD1000, WD1001 hard disk controllers

jos jos.dreesen at
Wed Nov 23 05:46:25 CST 2016

On 23.11.2016 01:03, Eric Smith wrote:
> On Tue, Nov 22, 2016 at 9:14 AM, jos <jos.dreesen at> wrote:
>> The MFM disk controller for later version Lilith's is clearly based on a
>> WD1001-05.
>> But uses a 8x305 iso 8x300.
> All of the WD1001 controllers I've seen use 8X305.  Some later WD1000 use
> 8X305 also.  I've disassembled the firmware of one WD1001-05 so far, and it
> does not use any of the added features of the 8X305.

I added a pic of a wd1001-85 and prom contents on

Prom contents is different from the Lilith ones.


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