| 1 | ; $Id: bs3-cmn-PrintChr.asm 60000 2016-03-11 19:12:05Z vboxsync $
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| 2 | ;; @file
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| 3 | ; BS3Kit - Bs3PrintChr.
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| 4 | ;
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| 5 |
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| 6 | ;
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| 7 | ; Copyright (C) 2007-2016 Oracle Corporation
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| 8 | ;
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| 9 | ; This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | ; available from http://www.virtualbox.org. This file is free software;
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| 11 | ; you can redistribute it and/or modify it under the terms of the GNU
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| 12 | ; General Public License (GPL) as published by the Free Software
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| 13 | ; Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | ; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | ; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | ;
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| 17 | ; The contents of this file may alternatively be used under the terms
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| 18 | ; of the Common Development and Distribution License Version 1.0
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| 19 | ; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | ; VirtualBox OSE distribution, in which case the provisions of the
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| 21 | ; CDDL are applicable instead of those of the GPL.
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| 22 | ;
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| 23 | ; You may elect to license modified versions of this file under the
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| 24 | ; terms and conditions of either the GPL or the CDDL or both.
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| 25 | ;
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| 26 |
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| 27 |
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| 28 | ;*********************************************************************************************************************************
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| 29 | ;* Header Files *
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| 30 | ;*********************************************************************************************************************************
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| 31 | %include "bs3kit-template-header.mac"
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| 32 |
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| 33 |
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| 34 | ;*********************************************************************************************************************************
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| 35 | ;* External Symbols *
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| 36 | ;*********************************************************************************************************************************
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| 37 | %if TMPL_BITS == 16
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| 38 | BS3_EXTERN_DATA16 g_bBs3CurrentMode
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| 39 | %endif
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| 40 | BS3_EXTERN_CMN Bs3Syscall
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| 41 |
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| 42 |
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| 43 | TMPL_BEGIN_TEXT
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| 44 |
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| 45 | ;;
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| 46 | ; @cproto BS3_DECL(void) Bs3PrintChr_c16(char ch);
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| 47 | ;
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| 48 | BS3_PROC_BEGIN_CMN Bs3PrintChr
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| 49 | BS3_CALL_CONV_PROLOG 1
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| 50 | push xBP
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| 51 | mov xBP, xSP
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| 52 | push xAX
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| 53 | push xCX
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| 54 | push xBX
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| 55 |
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| 56 | %if TMPL_BITS == 16
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| 57 | ; If we're in real mode or v8086 mode, call the VGA BIOS directly.
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| 58 | mov bl, [g_bBs3CurrentMode]
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| 59 | cmp bl, BS3_MODE_RM
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| 60 | je .do_vga_bios_call
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| 61 | ;later ; and bl, BS3_MODE_CODE_MASK
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| 62 | ;later ; cmp bl, BS3_MODE_CODE_V86
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| 63 | jne .do_system_call
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| 64 |
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| 65 | .do_vga_bios_call:
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| 66 | mov al, [xBP + xCB*2] ; Load the char
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| 67 | mov bx, 0ff00h
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| 68 | mov ah, 0eh
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| 69 | int 10h
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| 70 | jmp .return
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| 71 | %endif
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| 72 |
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| 73 | .do_system_call:
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| 74 | mov cl, [xBP + xCB*2] ; Load the char
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| 75 | mov ax, BS3_SYSCALL_PRINT_CHR
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| 76 | call Bs3Syscall ; (no BS3_CALL!)
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| 77 |
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| 78 | .return:
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| 79 | pop xBX
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| 80 | pop xCX
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| 81 | pop xAX
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| 82 | leave
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| 83 | BS3_CALL_CONV_EPILOG 1
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| 84 | ret
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| 85 | BS3_PROC_END_CMN Bs3PrintChr
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| 86 |
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