54 lines
1.2 KiB
NASM
54 lines
1.2 KiB
NASM
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DOSSEG
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.MODEL LARGE
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CRTL equ 4
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ALT equ 8
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DEL equ 53h
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INTERCEPT equ 4f00h
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WARM_BOOT_CODE equ 1234h
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ROM_DATA SEGMENT AT 040h
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org 17h
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KB_FLAG LABEL BYTE
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org 72h
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WARM_BOOT_FLAG LABEL WORD
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ROM_DATA ENDS
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.CODE
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ASSUME ds:nothing, es:nothing
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.286
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public _RebootSystem
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_RebootSystem proc far
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mov ax,3515h
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int 21h ; Get int 15h vector in ES:BX
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mov ax,es ; AX == Segment
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or ax,bx ; Is this a NULL ptr
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mov ax,seg ROM_DATA
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mov ds,ax ; ds addresses ROM BIOS data area
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assume ds:ROM_DATA
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jz WarmBoot ; If zero we can't do an int 15h
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DoInt15:
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mov KB_FLAG,CRTL+ALT
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mov ax,INTERCEPT OR DEL ; keyboard intercept, del key
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int 15h ; Put Ctrl/Alt/Del into key buffer
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WarmBoot:
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cli
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cld
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mov WARM_BOOT_FLAG,WARM_BOOT_CODE
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push 0ffffh
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push 0
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retf ; to processor power-on at ffff:0.
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_RebootSystem ENDP
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END
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