0 4 , ▁ 1 9 8 8 - 0 8 - 1 7 ) ▁drivers ▁in ▁MS - D OS , ▁Un iform ▁Software ▁Systems ' ▁The ▁Ext ender ▁( 1 9 8 5 ) ▁and ▁The ▁Con ne ctor ▁( 1 9 8 5 ) ▁for ▁Lot us ▁ 1 - 2 - 3 , ▁A bove ▁Disk ▁( 1 9 8 6 ) ▁( a ▁LIM ulator ▁by ▁A bove ▁Software ▁( former ly ▁Tele - W are ▁West ▁a ka ▁Los ▁Angeles ▁Sec ur ities ▁Group ) ▁that ▁converted ▁hard ▁disk ▁space ▁or ▁extended ▁memory ▁into ▁expanded ▁memory ), ▁and ▁OS / 2 ▁ 1 . 0 ▁and ▁ 1 . 1 ▁used ▁the ▁ 2 8 6 ▁LO AD ALL ▁instruction . ▁D OS ▁ 3 . 3 ▁and ▁ 4 . 0 ▁reserved ▁a ▁ 1 0 2 - byte ▁buffer ▁at ▁ 0 0 7 0 : 0 1 0 0 h ▁( which ▁was ▁normally ▁occupied ▁by ▁D OS ▁B IOS ▁data ) ▁so ▁that ▁there ▁was ▁no ▁need ▁to ▁save ▁& ▁restore ▁it ▁for ▁LO AD ALL . ▁Microsoft ' s ▁E MM 3 8 6 . EX E ▁special - cases ▁both , ▁the ▁ 2 8 6 ▁and ▁ 3 8 6 ▁LO AD ALL ▁instructions ▁in ▁its ▁invalid ▁op code ▁handler . ▁Ex am ination ▁of ▁the ▁virtual - machine ▁monitor ▁code ▁in ▁Windows / 3 8 6 ▁ 2 . 1 0 ▁shows ▁that ▁it ▁uses ▁both ▁the ▁ 2