🚀 go-pugleaf

mfroedge@lunatix.uucp (Maxwell Froedge) writes:



>1.  Where can I find software and documentation for these guys?

	Of course, you can find them through DEC.  The RT-11
	order number is QJ013 (or at least it was, last time
	I looked).  Most recent version is V5.6, released
	earlier this year.

>2.  Can I change the floppies to 1.2 meg drives.  I seem to
>remember a DEC PDP with a 1.2 meg floppy.

	If you mean the RX33 - yes, as long as you have an
	RQDX3 interface.

>3.  These are 11/23 processors.  I have 256K NEC 3rd cards
>installed.  What is the maxium memory these support (both the NEC
>cards and the 11/23 processor.)  The system is a Q-bus.

	There are two things contributing to whether your
	system is 18-bit or 22-bit.  First, the CPU.  If you
	have a KDF11-B (quad-high module), you have 22-bit
	support on-board.  If it is a KDF11-A (rev.c), you
	also have 22-bit support.  KDF11-A (rev.a) is 18-bit
	only.  Second, the backplane.  Since you mentioned they
	are MicroPDP-11's, I know they do have 22-bit support.
	The backplane is Q-CD for the first three slots and
	'zig-zag' q-q for the remaining slots.

	In a 22-bit machine, you can have up to 4mb of memory.

					Megan Gentry
					(RT-11 developer of 15 years)