On Jun 6, 2016, at 8:28 AM, Liam Proven wrote:
 >> But AFAIK IBM never shipped machines with
DS/DD/80t track drives as
>> standard, did it? 
On Mon, 6 Jun 2016, r.stricklin wrote:
   Of course they
did. PS/2 8530. 
 Oops. And the 5140 "Convertible". 
 
and, if we interpret his original query as referring to 5.25" drives,
(what were called "quad density" by marketing in the CP/M world), then
there is the IBM PC/JX (which was not sold in USA)
--
Grumpy Ol' Fred                     cisin at 
xenosoft.com