On Fri, 7 Sep 2012, Jason T wrote:
Interesting - that was an 8086 machine IIRC. Or am I
forgetting that
an XT could run Win 3.1?
XT could run Windoze 3.00, but could NOT run 3.10
3.10 requires A20 support and HIMEM.SYS. (Yes, it can run on an AT with
1M of RAM, but only if some of that RAM is mapped to reside above the 1M
line)
HIMEM.SYS "solved" the "RAM CRAM" issues of too many TSRs.
3.10 also installed SMARTDRV, (misconfigured to enable write cacheing,
altered write sequence, and return to DOS prompt without first writing the
buffers). Correcting that misconfiguration was the change that
differentiated MS-DOS 6.20 from 6.00, and "fixed the problems with disk
compression".