Joerg Hoppe
Experienced Member
Hi all,
after RX01 now also the RX02 drive is emulated in UniBone + QBone.
The RX211+RX02 combo passes the ZRXF and ZRXD diags, and boots RT11.5.4
This is exciting, as now all the floppy-based software can be used.
For example, use QUniBone to emulate just the RX floppy system in a PDP-11,
then install software from RX image files onto the real machine.
Run ./update-code.sh and ./update-files.sh, as documented earlier.
The usual links to general documentation:
http://retrocmp.com/projects/unibone
http://retrocmp.com/projects/qbone
https://groups.google.com/g/unibone
Now I need help with some existing RX01/02 images on the web.
* While searching bitsavers and others I found RX02 images,
which seem not readable in my drive. Luckily, they fail also in SimH.
One reason is: the RX01/02 floppies have 77 tracks, but track 0 is not used by DEC.
So some images contain only tracks 1..76 and are not SimH compatible.
Usable "77 track" images have a size of 256.256 resp 512.512 bytes.
* However even with a track 0 correction I can not boot the stuff from
http://www.bitsavers.org/bits/DEC/pdp11/floppyimages/dydp/
http://www.bitsavers.org/bits/DEC/pdp11/floppyimages/rx02/
Anybody got those running?
* Also I played with UCSD Pascal on an Apple II recently. Cool stuff!
I learned LSI11 was the devleopment machine for it.
Any pointers to disk images ?
thanks and kind regards,
Joerg
after RX01 now also the RX02 drive is emulated in UniBone + QBone.
The RX211+RX02 combo passes the ZRXF and ZRXD diags, and boots RT11.5.4
This is exciting, as now all the floppy-based software can be used.
For example, use QUniBone to emulate just the RX floppy system in a PDP-11,
then install software from RX image files onto the real machine.
Run ./update-code.sh and ./update-files.sh, as documented earlier.
The usual links to general documentation:
http://retrocmp.com/projects/unibone
http://retrocmp.com/projects/qbone
https://groups.google.com/g/unibone
Now I need help with some existing RX01/02 images on the web.
* While searching bitsavers and others I found RX02 images,
which seem not readable in my drive. Luckily, they fail also in SimH.
One reason is: the RX01/02 floppies have 77 tracks, but track 0 is not used by DEC.
So some images contain only tracks 1..76 and are not SimH compatible.
Usable "77 track" images have a size of 256.256 resp 512.512 bytes.
* However even with a track 0 correction I can not boot the stuff from
http://www.bitsavers.org/bits/DEC/pdp11/floppyimages/dydp/
http://www.bitsavers.org/bits/DEC/pdp11/floppyimages/rx02/
Anybody got those running?
* Also I played with UCSD Pascal on an Apple II recently. Cool stuff!
I learned LSI11 was the devleopment machine for it.
Any pointers to disk images ?
thanks and kind regards,
Joerg