Int D4 Fn 00 O - PC-mos/386 V5.01 - Obsolete Functions [O] AH = 00h and 01h Return: nothing Desc: PC-MOS/386 v5.01 reports that these functions are no longer supported and enters an endless loop Program: PC-MOS/386 is a multitasking/multiuser MS-DOS-compatible operating system by The Software Link, Inc.