21 Jun
2009
21 Jun
'09
2:07 a.m.
Aha, I see. I think that I shall begin with the installation of BSD 2.11.
The ESDI drive has 739 Mb of capacity... I guess if could be possible to
define more than one partition ar PC style...
I confess happily my ignorance, I'm a complete newbie (or nerd) in this
matter :-)
Another option could be to have a couple of drives... I suppose that I could
use two boards (the DQ696 and one RQDX3) in the PDP-11/23 PLUS... and I have
one MFM drive from one old PC ready to use.
This last question make think in something that I've read in some place or
file... Is it neccesary to start up with XXDP to format the MFM drives
connected to one RQDX3 ?
Thanks
Sergio
2009/6/20 Dave McGuire <mcguire at neurotica.com>
On Jun 19, 2009, at 3:38 PM, SPC wrote:
Mmm... Interesting technique. Some special parm
to use DD to write the
diverse OS's ? And with SIMH ?
I was thinking in RSTS, for example.
RSTS was the first OS I did it with. No special parameters are necessary
on either end. The format simh uses for disk emulation is just a raw
expanse of bytes, no weird stuff anywhere. That makes things very easy.
Just use the correct disk type in simh to make the image file the right
size. Use "rauser" and set the size explicitly if you're using an MSCP
disk
that's not a "standard" DEC size like an RD54 or whatever, like for your
ESDI controller.
I made a bootable XXDP RL02 pack using this trick just recently. I
transferred it to my 11/83 running 2.11BSD using FTP, cabled up an RL02
drive, put in a pack, did the dd, shut down, then I could boot that RL02
pack.
-Dave
--
Dave McGuire
Port Charlotte, FL