24 Feb
2009
24 Feb
'09
1:15 p.m.
On Tue, Feb 24, 2009 at 3:12 PM, Zane H. Healy <healyzh at aracnet.com> wrote:
On Tue, 24 Feb 2009, David Betz wrote:
I've never put an RXV11 or RXV21 into a MicroVAX, only into a PDP-11.
There is an RX driver for VMS, but the only place I've seen that used
is with an 11/750, and there's obviously no issue with an 18-bit
Unibus card in either a PDP-11 or an old VAX.
I'm not saying it can't be done, but I've certainly never seen 8"
floppies on a Qbus VAX. Electrically, there's no problem. It'd be a
driver issue, if any. If one has access to the driver sources, one
could check for 22-bit buffer support (or is the RXV11 non-DMA? I
can't remember now. If it doesn't need a DMA buffer, it would be a
non-issue for Qbus support. The Unibus driver should work the Qbus
card, too, through the CSR and the other card registers).
I have a friend who has a number (10-20) of
8" RT-11 floppies he wants to
archive to CD-ROM or some other modern media...
Personally I'd probably use one of the following:
MicroVAX III running VMS with a 8" drive capable of physically reading the
floppies
?OR
PDP-11 running RSX-11M+ with a 8" drive capable of physically reading the
floppies Basically you do a MOUNT/FORIEGN on the floppies, and
copy them to a disk
file. ?You can do something simular in RT-11, but I've not used it. ?The
same general principle works for Floppies, diskpacks, HD's and mag tapes.
Both for reading to, and writing out to.
Right. I've done that sort of things lots for backing up TU58s and
RL02 disks with EXCHANGE. The VAX doesn't have to know or care how
the media is laid out. BACKUP/PHYSICAL to a file should also work.
You'll get a wad of blocks that could be easily read in another
machine or fed to simh.
-ethan