From mboxrd@z Thu Jan 1 00:00:00 1970 From: dfawcus+lists-tuhs@employees.org (Derek Fawcus) Date: Mon, 25 Sep 2017 12:14:08 +0100 Subject: [TUHS] UNIX of choice these days? In-Reply-To: References: <20170923091704.GD10152@darioniedermann.it> <20170924140617.GG28606@mcvoy.com> <20170924203621.GA80203@wopr> <49B7FCB8-A086-4FFB-AF3B-4B3BD167EC54@bitblocks.com> Message-ID: <20170925111408.GA32953@accordion.employees.org> On Mon, Sep 25, 2017 at 05:58:23AM -0400, Steve Nickolas wrote: > > If I were designing an OS, only the bare minimum number of system calls > would be implemented in the kernel (stuff like open, close, seek, read, > write, and create/kill process) and everything else would be implemented > in library... I don't know how that would stack up against Unix in the > day, or *x these days, but I daresay it probably would have fewer system > calls than MS-DOS 2.0. Not all later developed OS's had loads of calls. One I used in the 90's (FlexOS) only had 40, having started around 84/85? with 41 (when known as Concurrent DOS-286). DF