Making an RT-11 TU58 Image
toby at coreware.co.uk
Sun Dec 7 14:02:32 CST 2008
Thanks for the advice. I've made an RL02 sized TU58 image and copied in
the modded DW.SYS driver from Wills site (I wrote up an explanation of
what I have did here if anyone else wants to give it a go
Will try booting it tomorrow but I think it should be fine.
> > I'd now like to get an RT-11 TU58 image so I can run
> > a boot into a real operating system on my disk-less
> > -11s. Whats the best way to go about making a suitable
> > image?
> > I have a working RT11 v5 setup under SIMH. Is it
> > possible to make a suitable image via this? One
> > thought is to make a RX01 boot image and but with a
> > TU58 boot block and then use this on the emulator.
> Yes, it's quite easy. You can build an RX image, or
> as hinted at above, you can create an entire RL02-sized
> image and use it with the TU58 driver (DD). It turns
> out that RT11's DD driver only cares about size of the
> media when it *writes*, but it can read any properly
> initialized media of any size.
> As you suggest, using SIMH, mount up a blank 'disk' of
> whatever variety you want (RX01 would be fine, but a
> little small for working with RT11 easily, I'd suggest
> an RL01 or RL02), and initialize it, copy over the
> files you want, and just as you say, do a COPY/BOOT
> with the TU58 driver (DD), such as:
> .COPY/BOOT:DD DL0:RT11SJ.SYS DL0:
> to put the TU58 driver in the boot block of a RL0x.
> At this point you'll need to physically cable your
> Linux box running the TU58 emulator and the PDP-11
> with a simple null-modem cable.
> When you fire up the PDP-11 hardware, you'll have to
> enter the TU58 bootstrap (which Will gives in his
> emulator documentation). At that point you should be
> home free. It won't be fast, but it will certainly
> function fine.
> If you do create a non-TU58-sized virtual disk image,
> you'll want to again refer to Will's docs where he
> gives you a patch to the DD.SYS driver, setting the
> number of blocks allowed. This will allow you to read
> and write to a larger (than standard TU58) disk image.
> Good luck!
> - Jared
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