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CP/M System Disks - Please Read

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    Got a URL, leed?


      Um... dat's LEEB...

      Im sorry... for 'my source'?

      David Keil's TRS-80 Emulator page...

      Because of this emulator I was able to 1) create 3.5" disks to boot from, and 2) configure the working IDE drive.

      If only the cp/m3 worked...
      Last edited by leeb; August 9, 2010, 05:50 PM.


        Sorry, leeb.

        I think the archive's damaged--note the big block of 0000 between CAF0h and 30ED0H. That doesn't look right. i.e. out of 208,896 bytes, 148,448 of them are zero.


          Yes, I noticed that when I opened it in notepad... last nite.

          Think simply removing the nulls would do any good? Just a thought.

          Id like to get CPM3 working so that I will know it a bit better when I attempt a re-write for the system Im attempting to design/build...

          A 'kinda-down-the-road' affair, as I have 2 machines that still require repair (and whats left of my hair ) but I want to be completely familiar with the memory-banking techniques it uses before I finish the system...

          Thanks for taking a look! Please feel free to PM me if you happen to find anything useful!


            I'll have a look through my collection when I get a chance to see if there's something there for the Mod 4 that you can use. But no--I don't think that removing the nulls will fix anything.


              I really didnt either.... just had to say it.

              I certainly appreciate your looking!!

              I may have just found one compliments of kb2syd's post in 'Model 4 Terminal Emulator' thread...

              They are .DSK files but I am sure I have software to work with them.... and I think my emulator works with .DSK images anyway.

              I am pleased to say that I now have a working copy of CPM+ for the 4p...
              An interesting note is: It will NOT BOOT on the emulator if the system is in 4p mode due to a 'fake' BOOTROM ...
              It WILL work in Model 4 w/FDC mode...
              A bit of a surprise, but at least it works!
              NOW.... I have to relearn everything so that I can get it to work with the 3.5" drives... and MORE SPACE!!! I didnt keep the SSDD 5.25s once I got the 3.5ers working... so more emulator play-time is in order!
              Last edited by leeb; August 12, 2010, 07:40 PM.


                Originally posted by leeb View Post
                Im trying to find a copy of CPM/3 for the Tandy Model 4/4p...
                Altho I found a source from the site that has the emulator Im using, it is in ACE format and every winace Ive downloaded claims its 'broken'...

                As long as I can find the system/bios file(s) I could probably connive a working system from it...
                It neednt be in the original format... and could even be in a DOS folder.

                Assistance would be greatly appreciated!
                I might be able to help you. I have an IBM PC/XT with a Matchpoint card and a modified 5.25" floppy drive, so I can read and write several hundred different kinds of 5.25" floppy formats. If I can download a CP/M image file I can _probably_ write it to the disk format your Tandy requires. (Probably. No guarantees.)


                  I appreciate your input but as I mentioned I was able to find it useable on the emulator...
                  It will likely need to be modified before I can use it on 3.5" drives...


                    Sheesh, where'd all this recent activity come from? Have I been gone, or what?

                    If anybody still needs CP/M+ for the Trashy-80 M-4 on original-type media, I know Mark has it. Whether he can lay his hands on sometime this century, I'll have to see but lemme know if it's still needed. (Last time I was over there he still had his 4 set up, but he has also swapped out the drives for 3.5", but kept the old media).

                    Teach your children how to think, not what, and hold 'em close, not tight.

                    Please visit the Vintage-Computer Wiki. Contributers welcome.


                      I didn't see this in the sticky - Don Maslin's boot disk and ROM archive WAS finally rescued. You can find my copy of it here:

                      Proud owner of 80-0007
             - The only one of its kind.


                        Anybody got a system disc for a LOS C25 CP/M system?


                          Any current information out there on where I might purchase MS-DOS 2.1 system disk for a TI personal portable computer?
                          Thank you