75 lines
2.0 KiB
NASM
75 lines
2.0 KiB
NASM
;; @file
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; Interrupt Redirection Template
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;
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;******************************************************************************
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;* Copyright (c) 2012, Insyde Software Corp. All Rights Reserved.
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;*
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;* You may not reproduce, distribute, publish, display, perform, modify, adapt,
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;* transmit, broadcast, present, recite, release, license or otherwise exploit
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;* any part of this publication in any form, by any means, without the prior
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;* written permission of Insyde Software Corporation.
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;*
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;******************************************************************************
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.686P
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.MODEL FLAT, C
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.CODE
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;----------------------------------------------------------------------------
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; Procedure: InterruptRedirectionTemplate: Redirects interrupts 0x68-0x6F
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;
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; Input: None
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;
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; Output: None
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;
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; Prototype: VOID
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; InterruptRedirectionTemplate (
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; VOID
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; );
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;
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; Saves: None
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;
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; Modified: None
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;
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; Description: Contains the code that is copied into low memory (below 640K).
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; This code reflects interrupts 0x68-0x6f to interrupts 0x08-0x0f.
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; This template must be copied into low memory, and the IDT entries
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; 0x68-0x6F must be point to the low memory copy of this code. Each
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; entry is 4 bytes long, so IDT entries 0x68-0x6F can be easily
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; computed.
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;
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;----------------------------------------------------------------------------
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InterruptRedirectionTemplate PROC C
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int 08h
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DB 0cfh ; IRET
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nop
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int 09h
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DB 0cfh ; IRET
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nop
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int 0ah
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DB 0cfh ; IRET
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nop
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int 0bh
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DB 0cfh ; IRET
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nop
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int 0ch
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DB 0cfh ; IRET
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nop
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int 0dh
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DB 0cfh ; IRET
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nop
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int 0eh
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DB 0cfh ; IRET
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nop
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int 0fh
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DB 0cfh ; IRET
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nop
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InterruptRedirectionTemplate ENDP
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DummyInterruptTemplate PROC PUBLIC
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DB 0cfh ; IRET
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DummyInterruptTemplate ENDP
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END
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