iAPX 286 Operating System Writers Guide 1983

iAPX286 'UCRO USE148LER Ente,. P,.ohcted Mode ?60;"Sl6 d_t.. PAGELOC OU LINE--..8Ie[:,.SOURCE ' .0134 80FE82 283 CHP OH,OT_ACCESS Be .u,.. it is an LOT desc,.ipto,.0137 7532 284 JNE BAD_LOT Jump if invalid2850139 26C6440592 286 HOY ES:CSIJ.ACCESS,OS_ACCESS; .14a,.k LOT lIS dat!l segmentOBE 8EDE 287 HOY OS,SI Poi~t OS at EPROM LOT0140.,OF03C6 288 LSL AX,SI Gat LOT limit0143E82600 289 CALL T:ST _OT _LIMIT Ye,.ify it i. valid0146 88C8 290 MOV CX, AX Save fo,. lat.,.291292 Examine the LOT alias segment and, if good, copy to RAM.2930148 2E8B7704 294 MOY SI,CS:CBXJ.LOT_ALIAS Get LOT .alia. selecto,.014C 8EC6 295 MOY ES,SI Point ES at alia:s segment014E OF03C6 296 LSL AX,SI G.t length of alias ~egm.nt0151 E81800 297 CALL TEST_DT_LIMIT Ve,.ify it is valid-