Online HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens
INT 28 - DOS Idle Loop / Scheduler (Undocumented)
- issued by DOS during keyboard poll loop
- indicates DOS may be carefully re-entered by TSR
- used by TSR programs to popup and make DOS disk I/O calls
- supported by OS/2 compatibility box
- default behavior is to simply perform an IRET
- any DOS functions above 0Ch may be called while in this handler
- INT 21,3F and INT 21,40 may not use a handle that refers to
CON while in this handler
- see also INDOS
[helppc.bosbyte.nl] DOS scheduler