Thank you for the answers. I've been following all the links you've sent I'll also follow the advice and try to understand some project like DOSLFN. (source code is only 220k)
Santiago El jue, 30 jun 2022 a la(s) 13:19, C. Masloch (pus...@ulukai.org) escribió: > On at 2022-06-30 10:00 -0500, Santiago Almenara wrote: > > Hello! > > > > What book or webpage do you recommend to learn some DOS assembler? > > > > Thanks in advance > > > > Santiago > > I learned primarily using these methods: > > 1. Read existing code and try to understand it. Even better, start with > higher-level commentary about code if you can find any. Some > applications' manuals are good for this, eg DOSLFN. > > 2. Have an english-language instruction set reference handy. I used the > one included with older NASM versions, which I subsequently forked when > it was dropped from NASM. [1] > > 3. Likewise, refer to the Interrupt List for reference as to what a > particular interrupt service does. Apart from some modern extensions it > is fairly complete. It can be found in plain-text files (split across a > lot of them, you can concatenate them to receive a single file) on Ralf > Brown's pages [2] and can be accessed online, page per page, hosted by > several different websites such as fd.lod.bz [3]. > > 4. Try out things in a debugger if unsure, such as when unclear about > what a particular instruction does, or to trace an existing program and > try to improve your understanding of its workings. My main project is > lDebug (with a small "L"), a debugger with a command line interface > that's based on FreeDOS Debug. [4] > > 5. You can also read some of the books that have been written about DOS. > At home I have the following print books: "FreeDOS Kernel", "DOS > Internals", "Undocumented DOS (Second Edition)" (UDOS), "Dissecting > DOS", "Extending DOS", "Advanced MS-DOS Programming", "Writing MS-DOS > Device Drivers", and a german "DR DOS 6.0" manual. UDOS and the DR DOS > manual are probably the best among these. > > Finally, I wrote a document called Assembly Comments Explained: Guide > for Advanced Learning and Style [5]. It is intended to clarify > conventions in my assembly language sources in particular. > > Regards, > ecm > > > [1]: https://pushbx.org/ecm/doc/insref.htm > [2]: http://www.cs.cmu.edu/~ralf/files.html > [3]: https://fd.lod.bz/rbil/index.html > [4]: https://pushbx.org/ecm/web/#projects-ldebug > [5]: https://pushbx.org/ecm/doc/acegals.htm > > > _______________________________________________ > Freedos-user mailing list > Freedos-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freedos-user >
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