Your head is full of a lot of good imformation. You should write a book to spread it around. We need more USB experts.
cheers DS On Thu, 30 Sep 2021 16:42:03 GMT "Bret Johnson" <bretj...@juno.com> writes: > > Bret, you are one of the few people who know how > > to write USB software. How did you learn to do it? > > Are there any good books on the subject? > > It's mostly been trial and error (with a heavy emphasis on the > error). My main reading for USB is just the USB specifications. > > Unfortunately, almost none of the USB hardware is 100% compliant > with the specifications (which, believe it or not, Microsoft seems > to encourage, at least indirectly). So, in addition to the > specifications, I need to occasionally do Internet searches for how > problems are handled by others, and also occasionally look at Linux > source code. I normally can't use the Linux source code directly, > though, since it's written in C instead of ASM and the Linux > architecture is completely different than DOS (Linux doesn't have > TSR's and doesn't have the same kinds of memory limitations that DOS > has). I don't know if you've really ever noticed, but TSR's that > are written in high-level languages (like C or Pascal) usually have > lots of in-line ASM since high-level languages don't work very well > when manipulating hardware. But, the Linux code reveals a lot of > experience in what doesn't work and some information about > non-compliant or non-standard hardware and where the non-compliance > occurs. > > The main USB-related web page I frequent is: > > http://janaxelson.com/usb.htm > > and she (Jan Axelson) has written some USB books, though I've never > read them. A lot of the questions on the PORTS Forum have to do > with how to get things to work with Windows and are not "general" > USB-related as such, but are sometimes still interesting or > relevant. > > > _______________________________________________ > Freedos-user mailing list > Freedos-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freedos-user > ******************************************************>>>> >From Dale Sterner - MS organic chemistry http://pubs.acs.org/doi/abs/10.1021/jo00975a052 *******************************************************>>>> ____________________________________________________________ Sponsored by https://www.newser.com/?utm_source=part&utm_medium=uol&utm_campaign=rss_taglines_more Merck's COVID-Pill Trial Went So Well It Was Halted Early http://thirdpartyoffers.juno.com/TGL3141/615711d89643a11d833edst04duc1 Lightning Didn't Kill Family Who Mysteriously Died on Hike http://thirdpartyoffers.juno.com/TGL3141/615711d8b57cb11d833edst04duc2 Current, Former Blue Origin Staff Pen Scathing Essay http://thirdpartyoffers.juno.com/TGL3141/615711d8d3bfc11d833edst04duc3 _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
