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RX02 for QUniBone is ready ... now media questions

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  • RX02 for QUniBone is ready ... now media questions

    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/pd...pyimages/dydp/
    http://www.bitsavers.org/bits/DEC/pd...pyimages/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

  • #2
    If you can emulate RX02 that would be great.
    Some efforts are made to read REAL RX02 floppy's, but as those are a mix of FM and MFM, that a normal PC floppy diver card
    can not handle.
    There for, to my knowledge there is no possibility to read real 8" RX02 floppy through a real 8"drive attached to a normal PC.
    So an image of a real FM MFM RX02 is not to be found yet.

    http://fileformats.archiveteam.org/wiki/DEC_RX02

    Comment


    • #3
      Originally posted by MauriceH View Post
      There for, to my knowledge there is no possibility to read real 8" RX02 floppy through a real 8"drive attached to a normal PC.
      So an image of a real FM MFM RX02 is not to be found yet.
      As of this week, there is now another set of DY images in bits/DEC/mixed_media/rx02
      Last edited by Al Kossow; March 4, 2021, 04:02 AM.

      Comment


      • #4
        >>> 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 ?

        I am trying to find the same. The disks I have located only contain the incomplete source code for the LSI-11 interpreter.

        If you look at the bottom of page http://pascal.hansotten.com/ucsd-p-s...-and-p-system/ you will see a link to "I.5 sources in text format". This link contains the text files for "mainop" and "procop" and various device bootstraps - but there are a few files missing I think. I have been slowly trying to piece the missing macros back together.

        However, I have 'fallen over' a problem with the macro cross assembler. It seems to complain about something. It may be the text file formatting (I am using OS/X instead of DOS). Basically, the assembler complains when it tries to assemble a label! It is fine with my other source files though...

        Dave

        Comment


        • #5
          Originally posted by daver2 View Post
          >>> 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 ?

          I am trying to find the same. The disks I have located only contain the incomplete source code for the LSI-11 interpreter.
          http://bitsavers.org/bits/Terak/Softech_II.0 ?

          Comment


          • #6
            Thanks Al.

            I will have a look. Hopefully, that will save some time and hassle!

            Dave

            Comment


            • #7
              I have a number of PDP-8 and PDP-11 RX01 and RX02 images in my tree for my RX02_EMULATOR project.

              Look here: https://github.com/AK6DN/rx02_emulator under disk_images

              These images are 256,256 bytes for RX01 and 512,512 bytes for RX02. Full physical drive disk images, all tracks, all sectors.

              They work under SIMH as well as on my emulator (of course).

              Don

              Comment


              • #8
                Note the images I posted a link to in the prior post are all taken as physical track:0-76/sector:1-26/byte:0-255 (for RX02) images.
                So they are exactly 77*26*256=512,512 bytes total length.

                Some other images may be posted in LOGICAL 512B block order as an image of the device,
                or may be physical images that have skipped over track 0 which is 26*256 bytes in length.
                These are NOT directly usable by SIMH for RX01/2 media.
                494K images are 76*26*256=505,856=494*1024 total length.

                Don

                Comment


                • #9
                  Hi Don,
                  Originally posted by AK6DN View Post
                  I have a number of PDP-8 and PDP-11 RX01 and RX02 images in my tree for my RX02_EMULATOR project.

                  Look here: https://github.com/AK6DN/rx02_emulator under disk_images

                  These images are 256,256 bytes for RX01 and 512,512 bytes for RX02. Full physical drive disk images, all tracks, all sectors.

                  They work under SIMH as well as on my emulator (of course).

                  Don
                  I saw your repository earlier and used RT11.RX as my test RT11 boot indeed, thank you!

                  However I was neither able to boot XXDP.RX2, nor could I "DIR DY1:" to NEW_GAMES.RX2 or ADVENT_MUSC.RX2 under RT11 or
                  What do I miss?

                  kind regards,
                  Joerg

                  PDP-11 simulator V4.0-0 Beta REALCONS build Mar 18 2018 git commit id: $Format:
                  sim> do -v boot.ini
                  boot.ini-1> set cpu 11/23, 256K
                  boot.ini-3> set rx disable
                  boot.ini-4> set ry enabled
                  boot.ini-6> attach ry0 RT11.RX2
                  RY: buffering file in memory
                  boot.ini-6> ; attach ry0 XXDP.RX2
                  boot.ini-8> attach ry1 NEW_GAMES.RX2
                  RY: buffering file in memory
                  boot.ini-8> ; attach ry1 ADCENT_MUSIC.RX2
                  boot.ini-11> reset all
                  boot.ini-13> boot ry0

                  RT-11SB V05.07

                  .R MSCPCK

                  .dir dy1:

                  ?DIR-F-Invalid directory

                  .


                  .

                  Comment


                  • #10
                    Originally posted by Al Kossow View Post
                    That looks very promising, thanks.

                    Btw, What tool do you use to convert these ImageDisk .IMD containers to a plain SimH-able sector stream?

                    best regards,
                    Joerg

                    Comment


                    • #11
                      I am not sure those disk images have the source code to the PDP P-code emulator though (although I haven't looked yet - so I may be speaking prematurely)...

                      I have, however, managed to get the source code I have been trying to resurrect to 'almost' assemble.

                      The MACRO-11 cross assembler I am using appears to have a few bugs - resulting in it 'hanging' whilst trying to assemble, or just generating a load of error messages when it shouldn't be.

                      I am a few definitions and macros missing, the start-up code and the trap handler code.

                      Happy to share if this would be of use to anyone...

                      I am trying to build a system for a KXT11-CA using the second serial port as a virtual TU58 device. Why not?!

                      Dave

                      Comment


                      • #12
                        Originally posted by Joerg Hoppe View Post
                        Hi Don,

                        I saw your repository earlier and used RT11.RX as my test RT11 boot indeed, thank you!

                        However I was neither able to boot XXDP.RX2, nor could I "DIR DY1:" to NEW_GAMES.RX2 or ADVENT_MUSC.RX2 under RT11 or
                        What do I miss?

                        kind regards,
                        Joerg

                        PDP-11 simulator V4.0-0 Beta REALCONS build Mar 18 2018 git commit id: $Format:
                        sim> do -v boot.ini
                        boot.ini-1> set cpu 11/23, 256K
                        boot.ini-3> set rx disable
                        boot.ini-4> set ry enabled
                        boot.ini-6> attach ry0 RT11.RX2
                        RY: buffering file in memory
                        boot.ini-6> ; attach ry0 XXDP.RX2
                        boot.ini-8> attach ry1 NEW_GAMES.RX2
                        RY: buffering file in memory
                        boot.ini-8> ; attach ry1 ADCENT_MUSIC.RX2
                        boot.ini-11> reset all
                        boot.ini-13> boot ry0

                        RT-11SB V05.07

                        .R MSCPCK

                        .dir dy1:

                        ?DIR-F-Invalid directory

                        .


                        .
                        The games disks I believe are OS8, not RT11 format.

                        The XXDP.RX2 disk is a PDP-11 bootable XXDP diagnostics disk, it is not RT11 format.

                        Comment


                        • #13
                          Originally posted by daver2 View Post
                          I am not sure those disk images have the source code to the PDP P-code emulator though (although I haven't looked yet - so I may be speaking prematurely)...

                          I have, however, managed to get the source code I have been trying to resurrect to 'almost' assemble.

                          The MACRO-11 cross assembler I am using appears to have a few bugs - resulting in it 'hanging' whilst trying to assemble, or just generating a load of error messages when it shouldn't be.

                          I am a few definitions and macros missing, the start-up code and the trap handler code.

                          Happy to share if this would be of use to anyone...

                          I am trying to build a system for a KXT11-CA using the second serial port as a virtual TU58 device. Why not?!

                          Dave
                          Why don't you try compiling natively instead of using some cross assembler?

                          Comment


                          • #14
                            Also FYI, located here: https://www.ak6dn.com/PDP-11/RX02/ are a bunch of RX02 XXDPv2 bootable PDP-11 diagnostic disks.

                            Comment


                            • #15
                              Originally posted by daver2 View Post
                              I am not sure those disk images have the source code to the PDP P-code emulator though (although I haven't looked yet - so I may be speaking prematurely)...

                              I have, however, managed to get the source code I have been trying to resurrect to 'almost' assemble.

                              The MACRO-11 cross assembler I am using appears to have a few bugs - resulting in it 'hanging' whilst trying to assemble, or just generating a load of error messages when it shouldn't be.

                              I am a few definitions and macros missing, the start-up code and the trap handler code.

                              Happy to share if this would be of use to anyone...

                              I am trying to build a system for a KXT11-CA using the second serial port as a virtual TU58 device. Why not?!

                              Dave
                              I have used this PDP-11 cross-assembler for ages: https://github.com/Rhialto/macro11 and have had no problems even with very complex macros and source files.

                              All my home grown diagnostics here: https://www.ak6dn.com/PDP-11/DIAGNOSTICS/ are built using it.

                              Comment

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