DOS ain't dead

Oberon/M 1.2 (OMF output) ... die, REGINT, die! (Developers)

posted by Arjay, 19.02.2012, 10:05

> Good to know, but ....
Doh! I missed the coment sub records in the docs I have been looking at! To be honest I have been patching by hand vs using your util-so missed that.

> What I really should've done was go record by record (sequentially from the
> top) and remove unnecessary ones, but that was much more complicated and
> slower, so I didn't bother.
No need. I would suggest for external patching that you use the 2nd process I offered up since as you also noted in TIS OMF 1.1:
"A COMENT record cannot be the first or last record in an object module. (The first record must always be THEADR or LHEADR and the last must always be MODEND.

So MODEND should *always* be the last record which from testing it appears OC also sets it to be. After some further investigations last night with working EXE's what I thought might be sensible approach is as follows:
1) Create an external tool which checks the obj header, reads and dumps the REGINT values (CS and IP, SS and SP, DS and ES), moves the MODEND back up the file overwriting the REGINT and updates the OBJ header to "Oberon-M (tm) PC v0.2". Alternatively create a COMENT string record before the MODEND with the values clearly shown, e.g. REGINT values: CS=xx etc
2)Update OC.EXE to not create the REGINT value (I'm almost on that) and change the header generated to "Oberon-M (tm) PC v0.2"


Oberon-M (tm) PC v0.3 might then look like this:
1)Update the external tool to use the values read (or stored in the REGINT coment) and fix a few other issues that from testing I believe also exist
2)Fix those issues in OC.EXE as well


OBJ2ASM is a project worth taking a look at. Unfortunately it doesn't support dumping REGINT fields, it does however support ignoring them and you will find you can recompile the output source to generate a cleaner OBJ.

I have used it for some of my testing along with various other tools, e.g. ODU and readobj.

Complete thread:

• OMF records - Rugxulo, 15.02.2012, 16:14 (Developers)
  • Just some research about the name "E. R. Videki" - rr, 15.02.2012, 21:09
    • Just some research about the name "E. R. Videki" - Arjay, 15.02.2012, 22:08
      • Just some research about the name "E. R. Videki" - Rugxulo, 15.02.2012, 23:19
        • Just some research about the name "E. R. Videki" - Arjay, 16.02.2012, 00:47
  • OMF records - Arjay, 15.02.2012, 22:36
    • OMF records - Rugxulo, 15.02.2012, 23:29
      • OMF records - Arjay, 16.02.2012, 01:09
        • OMF records - Rugxulo, 16.02.2012, 08:00
          • OMF records - rr, 16.02.2012, 09:51
            • OMF records - Arjay, 16.02.2012, 21:37
          • OMF records - marcov, 18.02.2012, 17:16
            • OMF records - Rugxulo, 18.02.2012, 17:32
              • OMF records - Rugxulo, 18.02.2012, 17:54
                • OMF records - marcov, 19.02.2012, 16:47
                  • OMF records - RayeR, 19.02.2012, 17:19
                    • OMF records - marcov, 20.02.2012, 10:33
                  • OMF records - Rugxulo, 19.02.2012, 21:33
                    • OMF records - marcov, 20.02.2012, 18:23
              • OMF records - marcov, 19.02.2012, 16:43
                • OMF records - Rugxulo, 19.02.2012, 21:15
                  • OMF records - marcov, 20.02.2012, 10:54
                    • OMF records - Rugxulo, 20.02.2012, 17:50
                      • OMF records - marcov, 20.02.2012, 18:54
                        • OMF records - Rugxulo, 20.02.2012, 20:09
  • OMF records - Japheth, 16.02.2012, 18:08
    • OMF records - Rugxulo, 16.02.2012, 19:48
      • OMF records - Arjay, 16.02.2012, 21:27
        • OMF records - Arjay, 16.02.2012, 21:52
          • OMF records - Rugxulo, 16.02.2012, 23:09
    • OMF records - Rugxulo, 17.02.2012, 02:15
      • OMF records - Japheth, 17.02.2012, 08:08
        • OMF records - Rugxulo, 17.02.2012, 20:21
          • OMF records - Japheth, 18.02.2012, 09:05
            • OMF records - Rugxulo, 18.02.2012, 16:39
              • OMF records - Japheth, 18.02.2012, 17:55
                • jwlinkd updated - Japheth, 20.02.2012, 14:31
                  • Oberon subtyping (was: JWlinkD updated) - Rugxulo, 20.02.2012, 20:14
                    • BEFI 3H (Oberon-M fully supported) - Rugxulo, 06.03.2012, 23:30
          • OMF records - processing SYS.OBJ with tdstrip - Arjay, 18.02.2012, 14:22
            • OMF records - processing SYS.OBJ with tdstrip - Arjay, 18.02.2012, 15:47
              • OMF records - processing SYS.OBJ with tdstrip - Rugxulo, 18.02.2012, 17:12
            • OMF records - processing SYS.OBJ with tdstrip - Rugxulo, 18.02.2012, 16:56
              • OMF records - processing SYS.OBJ with tdstrip - Arjay, 19.02.2012, 10:16
                • OMF records - processing SYS.OBJ with tdstrip - Rugxulo, 19.02.2012, 17:58
  • Oberon 1.2 OC (compiler) patch - Arjay, 18.02.2012, 23:37
    • Oberon/M 1.2 (OMF output) ... die, REGINT, die! - Rugxulo, 19.02.2012, 00:54
      • Oberon/M 1.2 (OMF output) ... die, REGINT, die! - Arjay, 19.02.2012, 10:05