Rich Alderson wrote: > As for operating system support, the only DEC operating system which > could put tapes and disks on the same Massbus was TOPS-20. Tops-10 > explicitly tells you in the SYSGEN process that disks and tapes must > reside on different channels; I believe that ITS follows that same > principle.
KS10 ITS has MIT hacked microcode for IO instuctions hardwired to use UBA 1 for disk and UBA 3 for tape. KA10 and KL10 ITS have TM10 I/O bus tape controllers, optionally using a DF10 channel.
