E. C. Masloch

> > my approach comes with support for triple-mode execution with little additional overhead, as an MZ EXE application, MZ EXE device driver, or kernel. > > Does this mean...

In that case the output is a flat-format .COM executable but you could wrap that in an MZ .EXE header as well to make use of the MZ header, particularly...

> I agree -- the zero-comp algorithm provides nice results already, the gain with something more sophisticated is not that big, but load times would certainly suffer. > > That...

What program did you use to generate this output? If you wrote it yourself, maybe you can upload it? I also created one, as an Extension for lDebug, though it...

MS-DOS (IO.SYS / MSDOS.SYS) and IBM PC-DOS (IBMBIO.COM / IBMDOS.COM) boot sector loaders may not work as expected because they may fail to initialise `bp` to 7C00h, so current SvarDOS...

> > I can look to see how reasonable it will be to support DR kernel, but will be a while until I get to it. > > That would...

 In msbio.tls there is a variable at 61Bh. I presume this is the one we're looking for.

Variable definition: https://hg.pushbx.org/ecm/msdos4/file/e58e166f626e/src/BIOS/MSBDATA.INC#l668 Uses in this file at the indicated spot and several more: https://hg.pushbx.org/ecm/msdos4/file/e58e166f626e/src/BIOS/MSCON.ASM#l70 Variable definition and some uses: https://hg.pushbx.org/ecm/edrdos/file/bda60c09a545/drbio/init.asm#l660 More uses: https://hg.pushbx.org/ecm/edrdos/file/bda60c09a545/drbio/console.asm#l134 In EDR-DOS there are two bytes...

Hacking a ".QUX" file onto a diskette with my current MS-DOS v4 build works as far as "dir" showing it, but the "type" command ("File not found - .QUX") and...

It also seems that the file cannot be created or truncated: ``` A>echo foo > .qux File creation error ```