Re: Getting floppy images to/from real floppy disks. - cctalk

28 May 2023

On 5/28/23 09:17, Tony Duell wrote:

...
  I've come across the former and have the
datasheets. From what I
 recall it was common to use it a control store sequencer and have
 microcode ROMs wider than the 8X300 needed, the extra bits were used
 to directly control hardware. 
Power hog (well, it was bipolar) with a 3-bit opcode and a somewhat
strange programming model. You could usually spot one by the 50 pin
cerDIP and the external pass transistor.  I think I still have a loose
one in my hellbox--and at least two in old systems.

--Chuck