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Thread: Osborne Executive Rescue

  1. #1

    Default Osborne Executive Rescue

    Hi everyone, new to the forums.

    I have a new-to-me Osborne Executive that I'd love to get functioning. Unable to get it to boot CP/M correctly, I disassembled it to find that it had been modified in the past. the F6821P chip UD12 had been double-stacked and quite a few non-standard wire traces had been made to different chips all octopus-like. It also has a non-standard ROM labeled "Multi TurboRAM v1.12 (c)1987" in the UD18 slot.

    Based on some pictures of Executive mainboards I found, and going off what the obvious modifications where, I've been able to return the board back to stock configuration. However, the non-standard ROM is what I believe is the last step to getting the unit functioning; but I'm unable to find anywhere that has a flashable ROM image for the Osborne Executive. I do have a chip imaging rig (that I've used on my old IBM PC's), all I need is a ROM image

    Anyone out there in vintage land be able to help out a fellow Osborne owner?

  2. #2

    Default

    I've searched and haven't been able to locate the ROM's for the Osborne Executive in the typical places.
    Bitsavers, amaus, and Maslin Archive doesn not have them.

    I did directory listings of the CPMPLUS{1..3}.RAW files looking for the ROMS. Also the OSE-CPMA, OSE-CPMB, and OSE-CPMC.RAW
    files.

    I did locate this information:

    http://www.retroarchive.org/maslin/d...rne/index.html
    Copyright (1986) by First Osborne Group (FOG)

    Filename CRC Description
    -FOG/CPM.048: Osborne Executive Specific programs
    //CPM048.DOC:
    /JUN/86 . :
    BUFEXEC .COM: 2D EF A modem program that uses CompuServe protocol
    BUFEXEC .DOC: B3 A2
    BUFEXECR.COM: C9 11 Another version of the BUFEXEC modem program
    BUFEXECR.DOC: F8 AB
    EXAUTO .ASM: 62 01 This can be assembled to replace EXECST
    EXECESAY.TXT: 82 D2 Info on SNAPSHOT and TIME (on FOG/CPM.047)
    EXECSCRN.COM: 91 03 Menu driven-- Sets screen attributes
    EXROM11 .COM: 95 09 Reads the Executive ROM from Bank 8 to a disk file
    EXROM11 .DOC: DF E2
    EXTONE1 .ASM: 4F 9E Demonstrates the noise generator in the Executive
    I don't see any Executive ROMS for Osborne in Mame.

    Maybe someone will have them saved.



    My conjured up definition for cpmtools:
    Code:
    # OSB3  Osborne Executive - SSDD 48 tpi 5.25" - 1024 x 5
    diskdef osb3
      seclen 1024
      tracks 40
      sectrk 5
      blocksize 1024
      maxdir 64
      skew 1
      boottrk 3
      os 2.2
    end
    Code:
    $cpmls -f osb3 -D CPMPLUS1.RAW
         Name    Bytes   Recs  Attr     update             create
    ------------ ------ ------ ---- -----------------  -----------------
    CHARGEN .COM    29K    228 R  
    COPY    .COM     8K     62 R  
    COPYSYS .COM     5K     34 R  
    CPM3    .SYS    18K    140 RS 
    DIR     .COM    15K    114 R  
    EXECST  .COM     3K     20 RS 
    PIP     .COM     9K     68 R  
    SETUP   .COM    11K     81 R  
    SHOW    .COM     9K     66 R  
        9 Files occupying    107K,      76K Free.
    
    $ cpmls -f osb3 -D CPMPLUS2.RAW
         Name    Bytes   Recs  Attr     update             create
    ------------ ------ ------ ---- -----------------  -----------------
    CPM3    .SYS    18K    140 RS 
    DATE    .COM     3K     22 R  
    DIR     .COM    15K    114 R  
    ERASE   .COM     4K     29 R  
    EXECST  .COM     3K     20 RS 
    HELP    .COM     7K     56 R  
    HELP    .HLP    62K    489 R  
    INITDIR .COM    32K    250 R  
    PIP     .COM     9K     68 R  
    RENAME  .COM     3K     23 R  
    SET     .COM    11K     81 R  
    SETDEF  .COM     4K     32 R  
    SUBMIT  .COM     6K     42 R  
    TYPE    .COM     3K     24 R  
       14 Files occupying    180K,       3K Free.
    
    $ cpmls -f osb3 -D CPMPLUS3.RAW
         Name    Bytes   Recs  Attr     update             create
    ------------ ------ ------ ---- -----------------  -----------------
    -       .003     1K      1    
    CPM3    .SYS    18K    140 RS 
    DEVICE  .COM     8K     58 R  
    DIR     .COM    15K    114 R  
    DUMP    .COM     1K      8 R  
    ED      .COM    10K     73 R  
    EXECST  .COM     3K     20 RS 
    GENCOM  .COM    15K    116 R  
    GET     .COM     7K     51 R  
    HEXCOM  .COM     2K      9 R  
    LIB     .COM     7K     56 R  
    LINK    .COM    16K    123 R  
    MAC     .COM    12K     92 R  
    PIP     .COM     9K     68 R  
    PUT     .COM     7K     55 R  
    RMAC    .COM    14K    106 R  
    SAVE    .COM     2K     14 R  
    SHOW    .COM     9K     66 R  
    SID     .COM     8K     62 R  
    XREF    .COM    16K    121 R  
       20 Files occupying    179K,       4K Free.
    
    
    $ cpmls -f osb3 -D OSE-CPMA.RAW
         Name    Bytes   Recs  Attr     update             create
    ------------ ------ ------ ---- -----------------  -----------------
    CHARGEN .COM    29K    228 R  
    COPY    .COM     8K     62 R  
    COPYSYS .COM     5K     34 R  
    CPM3    .SYS    18K    140 RS 
    DIR     .COM    15K    114 R  
    EXECST  .COM     3K     20 RS 
    PIP     .COM     9K     68 R  
    SETUP   .COM    11K     81 R  
    SHOW    .COM     9K     66 R  
        9 Files occupying    107K,      76K Free.
    
    
    $ cpmls -f osb3 -D OSE-CPMB.RAW
         Name    Bytes   Recs  Attr     update             create
    ------------ ------ ------ ---- -----------------  -----------------
    CPM3    .SYS    18K    140 RS 
    DATE    .COM     3K     22 R  
    DIR     .COM    15K    114 R  
    ERASE   .COM     4K     29 R  
    EXECST  .COM     3K     20 RS 
    HELP    .COM     7K     56 R  
    HELP    .HLP    62K    489 R  
    INITDIR .COM    32K    250 R  
    PIP     .COM     9K     68 R  
    RENAME  .COM     3K     23 R  
    SET     .COM    11K     81 R  
    SETDEF  .COM     4K     32 R  
    SUBMIT  .COM     6K     42 R  
    TYPE    .COM     3K     24 R  
       14 Files occupying    180K,       3K Free.
    
    
    $ cpmls -f osb3 -D OSE-CPMC.RAW
         Name    Bytes   Recs  Attr     update             create
    ------------ ------ ------ ---- -----------------  -----------------
    CPM3    .SYS    18K    140 RS 
    DEVICE  .COM     8K     58 R  
    DIR     .COM    15K    114 R  
    DUMP    .COM     1K      8 R  
    ED      .COM    10K     73 R  
    EXECST  .COM     3K     20 RS 
    GENCOM  .COM    15K    116 R  
    GET     .COM     7K     51 R  
    HEXCOM  .COM     2K      9 R  
    LIB     .COM     7K     56 R  
    LINK    .COM    16K    123 R  
    MAC     .COM    12K     92 R  
    PIP     .COM     9K     68 R  
    PUT     .COM     7K     55 R  
    RMAC    .COM    14K    106 R  
    SAVE    .COM     2K     14 R  
    SHOW    .COM     9K     66 R  
    SID     .COM     8K     62 R  
    XREF    .COM    16K    121 R  
       19 Files occupying    179K,       4K Free.

    Larry
    Last edited by ldkraemer; October 25th, 2018 at 04:19 AM. Reason: added dir listings

  3. #3
    Join Date
    Jul 2005
    Location
    State College, PA
    Posts
    140

    Default

    Quote Originally Posted by bdowne01 View Post
    Hi everyone, new to the forums.

    I have a new-to-me Osborne Executive that I'd love to get functioning. Unable to get it to boot CP/M correctly, I disassembled it to find that it had been modified in the past. the F6821P chip UD12 had been double-stacked and quite a few non-standard wire traces had been made to different chips all octopus-like. It also has a non-standard ROM labeled "Multi TurboRAM v1.12 (c)1987" in the UD18 slot.

    Based on some pictures of Executive mainboards I found, and going off what the obvious modifications where, I've been able to return the board back to stock configuration. However, the non-standard ROM is what I believe is the last step to getting the unit functioning; but I'm unable to find anywhere that has a flashable ROM image for the Osborne Executive. I do have a chip imaging rig (that I've used on my old IBM PC's), all I need is a ROM image

    Anyone out there in vintage land be able to help out a fellow Osborne owner?
    I'm not sure where I found it, but I have a version 1.2 ROM image for the Executive. Send me a PM with your email address, and I'll send it to you.

  4. #4
    Join Date
    Jul 2005
    Location
    State College, PA
    Posts
    140

    Default

    Quote Originally Posted by mloewen View Post
    I'm not sure where I found it, but I have a version 1.2 ROM image for the Executive. Send me a PM with your email address, and I'll send it to you.
    Actually, it's on Bitsavers:

    http://www.bitsavers.org/pdf/osborne...tive/firmware/

  5. #5

    Default

    You guys are awesome! Thank you!

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