DOS ain't dead - CauseWay DOS extender

CauseWay DOS extender (Announce)

posted by tkchia , 28.02.2025, 16:51
(edited by tkchia on 28.02.2025, 18:01)

Hello Japheth,

> > ... I have been maintaining my own set of changes to the
> > CauseWay extender v3.60, at https://codeberg.org/tkchia/causeway — as
> > part of the gcc-ia16 toolchain's support for 16-bit protected mode
> > programs
> Interesting. What object format is used there? COFF with 16-bit
> "extensions" - or OMF. And the binary format is still CauseWay's 3P?

Yes, the executable format is still 3P. The intermediate format is ELF/x86-32 with some non-standard relocations to represent segment:offset pairs (earlier proposed by Anvin, https://git.zytor.com/users/hpa/segelf/abi/tree/segelf.txt). Segment relocations are not quite supported yet. The whole setup is rather clunky and probably needs a rethink.

Also I currently use Lindauer's xlib to rebuild the cw.lib library of runtime routines, in case that is useful.

Thank you!

---
https://gitlab.com/tkchia · https://codeberg.org/tkchia · 😴 "MOV AX,0D500H+CMOS_REG_D+NMI"

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Complete thread:

CauseWay DOS extender - Japheth, 25.02.2025, 16:04 (Announce)
- CauseWay DOS extender - rr, 25.02.2025, 20:22
- CauseWay DOS extender - tkchia, 26.02.2025, 16:03
  - CauseWay DOS extender - Japheth, 27.02.2025, 15:30
    - CauseWay DOS extender - Rugxulo, 28.02.2025, 05:26
      - CauseWay DOS extender - Japheth, 28.02.2025, 07:14
        CauseWay DOS extender - Rugxulo, 28.02.2025, 10:30
      - CauseWay DOS extender - tkchia, 28.02.2025, 16:36
    - CauseWay DOS extender - tkchia, 28.02.2025, 16:51
    - CauseWay DOS extender - DosWorld, 28.02.2025, 23:11
- CauseWay DOS extender v5 - Japheth, 28.03.2025, 08:12
  - CauseWay DOS extender v5 - RayeR, 30.03.2025, 04:03
    - CauseWay DOS extender v5 - Japheth, 30.03.2025, 05:33
      - CauseWay DOS extender v5 - tkchia, 30.03.2025, 16:59
        CauseWay DOS extender v5 - Japheth, 30.03.2025, 17:27
        CauseWay DOS extender v5 - tkchia, 30.03.2025, 19:45
        CauseWay DOS extender v5 - RayeR, 01.04.2025, 16:10
        CauseWay DOS extender v5 - Japheth, 02.04.2025, 14:03
        CauseWay DOS extender v5 - DosWorld, 02.04.2025, 04:24
        CauseWay DOS extender v5 - tkchia, 05.04.2025, 07:41
      - CauseWay DOS extender v5 - roytam, 31.03.2025, 18:45
        CauseWay DOS extender v5 - Japheth, 01.04.2025, 08:56
        CauseWay DOS extender v5 - roytam, 01.04.2025, 14:32