DA_32       equ 4000h
DA_LIMIT_4K equ 8000h

DA_DPL0     equ 00h
DA_DPL1     equ 20h
DA_DPL2     equ 40h
DA_DPL3     equ 60h


DA_DR       equ 90h
DA_DRW      equ 92h
DA_DRWA     equ 93h
DA_C        equ 98h
DA_CR       equ 9Ah
DA_CCO      equ 9Ch
DA_CCOR     equ 9Eh

DA_LDT      equ 82h
DA_TaskGate equ 85h
DA_386TSS   equ 89h
DA_386CGate equ 8Ch
DA_386IGate equ 8Eh
DA_386TGate equ 8Fh

SA_RPL0     equ 0
SA_RPL1     equ 1
SA_RPL2     equ 2
SA_RPL3     equ 3

SA_TIG      equ 0
SA_TIL      equ 4

PG_P        equ 1
PG_RWR      equ 0
PG_RWW      equ 2
PG_USS      equ 0
PG_USU      equ 4

%macro Descriptor 3
    dw %2 & 0FFFFh
    dw %1 & 0FFFFh
    db (%1 >> 16) & 0FFh
    dw ((%2 >> 8) & 0F00h) | (%3 & 0F0FFh)
    db (%1 >> 24) & 0FFh
%endmacro

%macro Gate 4
    dw (%2 & 0FFFFh)
    dw %1
    dw (%3 & 1Fh) | ((%4 << 8) & 0FF00h)
    dw ((%2 >> 16) & 0FFFFh)
%endmacro