struc TSS32
{
.PreviousTaskLink dw ?
.Reserved0 dw ? ;--4
.ESP0 dd ?
.SS0 dw ?
.Reserved1 dw ? ;--12
.ESP1 dd ?
.SS1 dw ?
.Reserved2 dw ? ; 20
.ESP2 dd ?
.SS2 dw ?
.Reserved3 dw ? ; 28
.tsCR3 dd ?
.tsEIP dd ? ; 36
.tsEFLAGS dd ?
.tsEAX dd ? ; 44
.tsECX dd ?
.tsEDX dd ? ; 52
.tsEBX dd ?
.tsESP dd ? ; 60
.tsEBP dd ?
.tsESI dd ?
.tsEDI dd ? ; 72
.tsES dw ?
.Reserved4 dw ? ; 76
.tsCS dw ?
.Reserved5 dw ?
.tsSS dw ?
.Reserved6 dw ?
.tsDS dw ?
.Reserved7 dw ?
.tsFS dw ?
.Reserved8 dw ?
.tsGS dw ?
.Reserved9 dw ?
.LDTSegmentSelector dw ?
.Reserved10 dw ?
.DebugByte db ?
.Reserved11 db ?
.IOMapBaseAddress dw ?

}



struc TSS {

    .limit dw 0x100
    .adrlow dw ?
    .adrcenter db ?
    .conffield1 db ?
    .conffield2 db ?
    .adrhigh db ?

}

TSS_ExitProcess TSS32

mov edx,TSS_ExitProcess
mov byte [Ext.conffield1],10001001b
mov word [Ext.adrlow],dx
shr edx,16
mov byte [Ext.adrcenter],dl
mov byte [Ext.conffield2],10000000b
shr dx,8
mov byte [Ext.adrhigh],dl

GDT:
    rq 1
    KCSD db 0xff,0xff,0x00,0x00,0x00,10011010b,11001111b,0x00
    KDATD db 0xff,0xff,0x00,0x00,0x00,10010010b,11000000b,0x00
    UCSD db 0xff,0xff,0x00,0x00,0x00,11111010b,11001111b,0x00
    UDATD db 0xff,0xff,0x00,0x00,0x00,11110010b,11001111b,0x00
    kernel_manager TSS
    UPROCESS1 TSS
    UPROCESS2 TSS
    UPROCESS3 TSS
    VIDEO db 0xff,0xff,0x00,0x80,0x0b,10010010b,00001111b,0x00
    Ext TSS

    len_GDT equ $ - GDT
IDT:

    rq 0x30

    timer db 0x00,0x00,0x28,0x00,0x00,10000101b,0x00,0x00 ; IRQ 30
    keyboard db 0x00,0x00,0x08,0x00,0x00,10001110b,0x00,0x00 ; IRQ 31
    slave_PIC db 0x00,0x00,0x08,0x00,0x00,10001110b,0x00,0x00 ; IRQ 32
    com24 db 0x00,0x00,0x08,0x00,0x00,10001110b,0x00,0x00 ; IRQ 33
    com13 db 0x00,0x00,0x08,0x00,0x00,10001110b,0x00,0x00 ; IRQ 34
    LPT2 db 0x00,0x00,0x08,0x00,0x00,10001110b,0x00,0x00 ; IRQ 35
    controller_floppy db 0x00,0x00,0x08,0x00,0x00,10001110b,0x00,0x00 ; IRQ 36
    LPT1 db 0x00,0x00,0x08,0x00,0x00,10001110b,0x00,0x00 ; IRQ 37
    real_timer db 0x00,0x00,0x08,0x00,0x00,10001110b,0x00,0x00 ; IRQ 38
    any_device db 0x00,0x00,0x08,0x00,0x00,10001110b,0x00,0x00 ; IRQ 39
    any_device2 db 0x00,0x00,0x08,0x00,0x00,10001110b,0x00,0x00 ; IRQ 3a
    any_device3 db 0x00,0x00,0x08,0x00,0x00,10001110b,0x00,0x00 ; IRQ 3b
    any_device4 db 0x00,0x00,0x08,0x00,0x00,10001110b,0x00,0x00 ; IRQ 3c
    error_fpu_operation db 0x00,0x00,0x08,0x00,0x00,10001110b,0x00,0x00 ; IRQ 3d
    any_device5 db 0x00,0x00,0x08,0x00,0x00,10001110b,0x00,0x00 ; IRQ 3e
    any_device6 db 0x00,0x00,0x08,0x00,0x00,10001110b,0x00,0x00 ; IRQ 3f
    Hgui db 0x00,0x00,0x08,0x00,0x00,11101110b,0x00,0x00 ; IRQ 40
    IExitProcess db 0x00,0x50,0x00,0x00,0x00,10000101b,0x00,0x00 ; IRQ 41
    IDTlen equ $ - IDT

ExitProcess:

    mov dx,[ebx]
    movzx edx,dx

    add edx,GDT
    bts word [edi+6],12 ; .conffield2

    iretd
    jmp near ExitProcess