Possible to speed up I/O subsystem of 5150?

[Tony Duell]

> Well, original ATA was nothing more than a straight forward
> adaption of the MFM controler - and that one was still good
> for 8 Bit access. Also, there was never (at least in the beginning)

You do realise that the XT disk controller and AT disk controller are 
totally different things (and have a different software interface). AFAIK 
the AT hard disk controller assumes a 16 bit bus, at least for the data 
transfer register.

-tony