[BBC-Micro] WD179x in an FPGA

[Mark McDougall]

Mike Tomlinson wrote:

> Not sure how compatible the 179x and 177x are.  Perhaps the command set
> is similar?

The WD177x family is basically a WD1793 with internal data separator and 
write precompensation circuitry. From a software POV, they're almost 
identical, with the 1773 being 100% software-compatible with the 1793. AFAIK 
the major differences between the 177x family are stepping rates.

IOW, the differences are minor. I had always planned to add 177x 
compatibility to the 179x emulation anyway.

Regards,

-- 
|              Mark McDougall                | "Electrical Engineers do it
|  <http://members.iinet.net.au/~msmcdoug>   |   with less resistance!"