DOS ain't dead - DS and ES matching

DS and ES matching - PDB meaning (Developers)

posted by kerravon , Ligao, Free World North, 18.10.2025, 19:04

> https://hg.pushbx.org/ecm/msdos4/file/51ad27d225a8/src/DOS/MISC.ASM#l357
>
> Process Data Block. It means the same as the Process Segment Prefix, yes.

Thanks. I didn't check what "hell" is, in Microsoft's professional opinion. :-)

invoke DOSINIT ; go to hell

BTW, I think the DOS 4 MT we have is quite old. I went through the documentation,
and so far I haven't seen a reference to what the segment registers are on entry.

Thinking back, it was someone else's analysis online, about a more modern
multitasking version, that mentioned what system call you need to invoke
to retrieve the PSP.

But I haven't been able to find that so far. I tried the links at Wikipedia,
and some weren't working for me. Still looking.

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Complete thread:

DS and ES matching - kerravon, 18.10.2025, 11:29
- DS and ES matching - ecm, 18.10.2025, 12:48
  - DS and ES matching - kerravon, 18.10.2025, 14:43
    - DS and ES matching - PDB meaning - ecm, 18.10.2025, 18:32
      - DS and ES matching - PDB meaning - kerravon, 18.10.2025, 19:04
        DS and ES matching - PDB meaning - ecm, 18.10.2025, 19:41
        DS and ES matching - PDB meaning - kerravon, 18.10.2025, 19:59
        DS and ES matching - PDB meaning - kerravon, 18.10.2025, 20:01
- DS and ES matching - kerravon, 19.10.2025, 10:32