20 Oct
2024
20 Oct
'24
1:23 p.m.
use pdp11gui or vtserver. They can use ODT to upload a small program to
the 11 which allows it to send or receive an image to a MCSP or
RL/RX/Whatever drive. Can be slow (top speed is 9600 or 19200 baud on an
11/23) but it does get the job done.
C
On 10/20/2024 9:02 AM, Peter Ekstrom wrote:
Thank you all for the tips and pointers. I like the
idea of pulling the
image off of my real drive, but how would I transfer it between the pdp
and my Linux box with Simh? It is too big for the tu58 emulator.
On Sun, Oct 20, 2024 at 03:15 cz via cctalk <cctalk(a)classiccmp.org
<mailto:cctalk@classiccmp.org>> wrote:
If you go this route, be advised, that SIMH
creates RD32 disk
images
are not the same size as a real RD32. This will
likely cause
problems
when writing a SIMH created image to a real disk
(and I'm not
talking
about the additional issues that the trailing
metadata on disk
images
from the Pizzolato version of SIMH can cause -
the problem I'm
describing is caused by an incorrect disk size value in SIMH).
True, I think you can get around this by making them disk in SIMH a
couple of blocks smaller.
However there is another way. Format your real RD32 with the RQDX3
formatter, then once formatted suck it into a file. Then you have an
exact replica you can mount in SIMH and load it up.
I did this with a 154mb Hitachi ESDI MCSP disk that went "bad" 30 years
ago and would not boot. Sucked it in, booted RSX11M off a virtual
drive,
then mounted it. Turns out when I did a purge of old files I deleted
the
RSX11M.TSK file I was using to boot because I forgot to do a /SAV /
WB in
VMR to update the boot block to the new file location. Did that, system
booted, then copied it back to the "real" Hitachi disk.
Back in operation. :-)