https://twetch.app/t/c35c8a35455cef7a097e5c4d90e8342ca9b6fd…

https://twetch.app/t/c35c8a35455cef7a097e5c4d90e8342ca9b6fdd51247fd60ae830afc9bc8fc77 Consequently, the 5100's microcode was written to emulate most of the functionality of both a System/370 and a System/3