Yes, XP is the last version to support DOS - but now running under XP. *Native DOS* is approx 20 times faster than XP. It has a one-to-one CPU cycle correlation with Intel machine code. E.g. on an 80486/66 processor, the number of byte instructions executed per second was 69,206,016 - as expected from a 66MHz processor (when Windoze does not get in the way.) My current processor is 3.2GHz. I have PGP WDE installed and it does not support multi-OS booting. It would be quicker for me to build a native DOS-only machine. Thanks anyway. Cheers, Chris Poncelet
On 14/04/2020 14:58, R.S. wrote: > W dniu 12.04.2020 o 03:11, CM Poncelet pisze: >> Yes - I still use DOS and SPF/PC, which are about 20 times faster >> CPU-wise than Windows XP (the last version that still supports DOS >> applications.) > > XP is the last version that supports DOS applications? > I think it is matter of 32-bit vs 64-bit version/flavour of Windows. > > Simply speaking, 64-bit Windows does not support 16-bit applications, > including Windows apps, like IBM Bookreader 2.03. > Of course it is not good reason to stay with 32-bit Windows on PC > machine with 32GB of RAM. > > There are better ways: > 1. Use DOSbox. It's freeware, intended to run old games, but other > apps are supported as well. > 2. Use Virtual Box. It is "z/VM", which can host older systems > including old Windows versions and DOS itself. It's also free. > > I would vote for Virtual Box, since you can have many virtual > machines, clones (just for quick and potentially dangerous tests) and > you can have "full-sized" Windows environment like Win XP with older > Office and other stuff. > And you can have OS/2 as a guest. > And your OS need not to be Windows, it can be Linux. > > (of course licenses are needed for the stuff above) > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
