I don't suppose any one left in IBM has any knowledge of this. Perhaps no one ever did and it was all done by Motorola. Wikipedia says there were/are 2x68000 CPU's.. .. I would ask on IBM Main...
http://www.cpushack.com/2013/03/22/cpu-of-the-day-ibm-micro-370/ seems to have some names.. Dave > -----Original Message----- > From: cctalk <cctalk-boun...@classiccmp.org> On Behalf Of Lars Brinkhoff > via cctalk > Sent: 12 March 2018 07:02 > To: cctalk@classiccmp.org > Subject: XT/370 microcode > > Does someone have good connections with people inside IBM? I'd like to ask > about 68000 microcode for the XT/370 product.