Strange device, stuff available FS or Trade

From: Chuck McManis <cmcmanis_at_mcmanis.com>
Date: Wed Aug 2 18:19:50 2000

At 03:50 PM 8/2/00 -0700, Ethan wrote:
>It does kinda matter which way you are going (i.e., Unibus or Q-bus CPU)...
>mostly because the Unibus is 18-bit and the Q-bus is 18 or 22 bit (or 16 ;-)
>with completely different ideas about how to map space (which matters at
>the driver level, not the hardware level).

This apparently can go both ways. There is configuration information on
mapping the Q-bus into the Unibus address space for Unibus CPUs and details
on how to run it the other way for Q-bus CPUs to access Unibus peripherals.
But, like I mentioned I can't seem to find the Q-bus side in the pile yet.
Fortunately I got the docs so if one shows up I would recognize it!

> It [11/750] sits, temporarily unloved, until I can wire a 30A
> Hubble receptacle for it.

A VAX is a terrible thing to waste :-) Buried in the bottom of a 19" rack
with literally leaves on top and spiderwebs inside was a VLC with 16MB of
memory and an RZ23L inside. I cleaned it up, powered it up, and booted the
disk. VMS 6.0 booted happy as a clam! These things are becoming my favorite
little VAX, they are small, seem to be indestructible, support cheap SCSI
disks and are much faster than a MicroVAX 2000 or a MVII.

>If not, please let me know. I have an 8300.

Will do.

--Chuck
Received on Wed Aug 02 2000 - 18:19:50 BST