On 2016-09-16 18:13, Gene Irwin wrote:
Simh seems to only support a single Ts11 drive.

The quick reference guide for the drive specifies up to 4 drives.

Am I missing something or is thus just not coded in?

I would guess it's just a coded limitation in simh. In fact, there is no real limit to the number of TS11 you can connect to a PDP-11. It's just a Unibus device with a bunch of CSRs. You can always just add another card, if you wanted to, in the floating address space in the I/O page, until you run out of space, which definitely fits way more than four controllers.

But I suspect the four controller limit specified in the manuals are because of power and/or throughput limitation on the bus.

simh have lots of such limitations and restrictions on various devices you can add.

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