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pascal@19515
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1 ;***************************************************************
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pascal@19515
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2 ;****** This file is distributed under GPL
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pascal@19515
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3 ;***************************************************************
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pascal@19515
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4 ideal
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pascal@21984
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5 %PAGESIZE 1000
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pascal@19515
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6 %crefref
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pascal@19515
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7 %noincl
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pascal@19515
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8 %nomacs
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pascal@19636
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9 ifdef NO386
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pascal@19636
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10 p8086
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pascal@19636
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11 else
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pascal@19515
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12 p386
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pascal@19636
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13 endif
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pascal@19515
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14
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pascal@23983
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15 group DGROUP _TEXT
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pascal@19515
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16 assume cs:DGROUP,ds:DGROUP
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pascal@19515
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17
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pascal@19515
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18 segment _TEXT byte public use16 'CODE'
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pascal@19515
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19
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pascal@19905
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20 ;***************************************************************
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pascal@20473
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21 ;void dos_shutdown()
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pascal@20473
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22 ;***************************************************************
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pascal@20473
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23
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pascal@20473
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24 macro dos_shutdown
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pascal@21342
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25 xor si,si
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pascal@24013
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26 ifdef QUICK_BOOT
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pascal@24013
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27 extrn _cmdnum:dword
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pascal@24013
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28 quickboot = (word _cmdnum+20)
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pascal@24013
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29 cmp si,[quickboot]
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pascal@21342
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30 mov ds,si
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pascal@24013
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31 jne skip_shutdown
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pascal@24013
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32 else
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pascal@24013
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33 mov ds,si
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pascal@24013
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34 endif
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pascal@20473
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35 ifndef NO386
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pascal@21342
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36 push [dword si+4] ; save step
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pascal@21342
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37 mov [word si+4],offset step19
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pascal@20473
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38 else
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pascal@20473
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39 mov ax,offset step19
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pascal@21342
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40 xchg ax,[word si+4]
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pascal@21342
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41 push [word si+6]
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pascal@20473
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42 push ax ; save step
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pascal@20473
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43 endif
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pascal@20473
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44 mov [word cs:sssp],sp
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pascal@21342
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45 ;cmp [byte si+7],0F0h
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pascal@20473
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46 ;jnc notdos
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pascal@21342
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47 mov [si+6],cs
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pascal@20473
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48 pushf
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pascal@20473
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49 pushf
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pascal@20473
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50 pop ax
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pascal@20473
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51 inc ah ; set TF
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pascal@20473
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52 push ax
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pascal@20473
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53 popf
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pascal@21342
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54 call [dword si+4*19h]
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pascal@20473
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55 notdos:
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pascal@20473
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56 ifndef NO386
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pascal@20473
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57 lss sp,[dword cs:sssp]
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pascal@20473
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58 else
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pascal@20473
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59 lds ax,[dword cs:sssp]
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pascal@20473
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60 push ds
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pascal@20473
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61 pop ss
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pascal@20473
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62 xchg ax,sp
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pascal@20473
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63 endif
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pascal@21342
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64 xor si,si
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pascal@21342
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65 mov ds,si
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pascal@21342
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66 pop [dword si+4] ; restore step
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pascal@24013
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67 skip_shutdown:
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pascal@20473
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68 endm
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pascal@20473
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69 macro step19code
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pascal@20473
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70 step19:
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pascal@21342
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71 push si
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pascal@20473
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72 push ds
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pascal@21342
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73 mov si,sp
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pascal@21342
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74 lds si,[dword ss:si+4] ; read cs:ip
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pascal@21342
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75 cmp [word si],19CDh ; int 19h ?
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pascal@20473
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76 pop ds
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pascal@21342
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77 pop si
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pascal@20473
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78 je notdos
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pascal@20473
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79 iret
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pascal@20473
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80 endm
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pascal@20473
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81
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pascal@20473
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82
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pascal@20473
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83 ;***************************************************************
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pascal@19905
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84 ;void boot_kernel();
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pascal@19905
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85 ;****** Never returns
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pascal@19905
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86 ;***************************************************************
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pascal@19903
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87 global _boot_kernel:near
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pascal@19905
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88 proc _boot_kernel near
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pascal@19905
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89
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pascal@21757
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90 ifdef NO386
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pascal@20142
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91 p8086
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pascal@19903
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92 else
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pascal@20142
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93 p386
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pascal@19903
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94 endif
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pascal@20473
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95 ;cli ; we start doing destructive things to DOS
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pascal@21757
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96 extrn sssp:word
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pascal@22288
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97 mov ax,[sssp+2]
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pascal@22288
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98 mov es,ax
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pascal@23996
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99 extrn _cmdstr:word
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pascal@23996
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100 _cmdline = _cmdstr+0
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pascal@19571
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101 mov si,[_cmdline]
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pascal@19571
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102 mov di,8000h
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pascal@22288
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103 mov cx,2000h ; 4k for cmdline + 4k up to sp
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pascal@19571
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104 rep
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pascal@19571
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105 movsb
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pascal@22288
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106 push es
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pascal@22288
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107 pop ss
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pascal@22288
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108 mov sp,di
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pascal@22019
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109
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pascal@22288
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110 mov dx,2000h
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pascal@22288
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111 global _csip_hilo:word
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pascal@22288
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112 org $-2
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pascal@22288
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113 _csip_hilo dw ?
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pascal@22288
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114 xchg al,dh ; 9020 / 9000
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pascal@22288
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115 push ax
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pascal@22288
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116 push dx ; 0000 / 0042
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pascal@22288
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117
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pascal@22288
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118 mov cl,1 ; load high ?
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pascal@22179
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119 org $-1
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pascal@22288
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120 global _pm_low:byte
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pascal@22288
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121 _pm_low db ?
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pascal@22019
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122 push cx
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pascal@22019
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123 mov ax,[word ss:024Ch]
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pascal@22019
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124 xor ax,2b30h ; ipxe ?
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pascal@22019
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125 loopne @@notipxe
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pascal@22019
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126
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pascal@22019
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127 ; finish loading
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pascal@22019
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128 extrn @last_ditch$qv:near
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pascal@22008
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129 push cs
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pascal@22008
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130 call @last_ditch$qv
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pascal@22152
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131 dos_shutdown ; clear si; ds=0; kill VCPI
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pascal@22152
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132 push cs
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pascal@22152
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133 pop ds
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pascal@22019
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134
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pascal@22019
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135 @@notipxe:
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pascal@22019
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136 pop cx
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pascal@22019
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137 loop @@isbzimage
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pascal@22019
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138
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pascal@20477
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139 ; prepare memcpy32 size & srcofs param to move zImage pm
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pascal@21781
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140 ifndef NO386
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pascal@21781
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141 push 8 ; size hi
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pascal@21781
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142 else
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pascal@20477
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143 mov dx,8
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pascal@20477
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144 push dx ; size hi
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pascal@21781
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145 endif
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pascal@22288
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146 push si ; size lo=up to 512k
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pascal@23984
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147
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pascal@23984
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148 include "himem.inc"
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pascal@23984
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149
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pascal@23984
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150 extrn _imgs:image_himem
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pascal@23984
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151 push [_imgs.fallback] ; src ofs = pm.fallback
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pascal@20477
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152
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pascal@19538
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153 ;in al,70h
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pascal@19538
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154 ;or al,80h ; disable NMI
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pascal@19538
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155 ;out 70h,al
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pascal@20477
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156
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pascal@22288
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157 push si ; src seg=0
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pascal@21628
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158 inc cx
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pascal@21628
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159 push cx ; dst ofs hi
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pascal@24013
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160 push si ; dst ofs lo : 64k = 0x10000
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pascal@22288
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161
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pascal@22288
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162 ; self move
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pascal@22288
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163 extrn gdt_data
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pascal@22288
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164 mov cx,offset gdt_data+8
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pascal@22288
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165 ;xor di,di ; A000 -9000 -0800(>movedend)
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pascal@22288
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166
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pascal@22288
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167 ifdef NO386
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pascal@22288
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168 mov ax,ss
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pascal@22288
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169 add ax,900h
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pascal@22288
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170 push ax ; topseg()+0x0900
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pascal@22288
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171 else
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pascal@22288
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172 push 9800h+(4096/16) ; 4096 bytes for cmdline
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pascal@22288
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173 endif
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pascal@22288
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174 pop es
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pascal@22288
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175 push es
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pascal@22288
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176
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pascal@22288
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177 call near @@movsb@jmp ; movsb; pop cs ; ds=es=ss
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pascal@22288
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178
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pascal@20528
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179 extrn memcpy32:near
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pascal@20528
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180 call memcpy32
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pascal@19515
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181
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pascal@22176
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182 ifdef MOVE_SETUP
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pascal@22288
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183 mov si,0
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pascal@22288
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184 global _rm_offset:word
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pascal@22288
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185 org $-2
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pascal@22288
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186 _rm_offset dw ?
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pascal@22176
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187 ;xor di,di
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pascal@22288
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188 ;mov cx,8000h
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pascal@22176
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189 ;sub cx,si
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pascal@22288
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190 ;rep
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pascal@22288
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191 ; movsb
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pascal@22176
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192 endif
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pascal@22176
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193
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pascal@19515
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194 ifndef noelks
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pascal@22288
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195 ifdef MOVE_SETUP
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pascal@19515
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196 ifndef NO386
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pascal@22288
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197 mov eax,[dword si+1E6h]
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pascal@22288
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198 xor eax,'SKLE'
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pascal@22288
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199 else
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pascal@22288
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200 mov ax,[si+1E6h]
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pascal@22288
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201 xor ax,'LE'
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pascal@20473
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202 jne @@notelks
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pascal@22288
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203 mov ax,[si+1E8h]
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pascal@22288
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204 xor ax,'SK'
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pascal@22288
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205 endif
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pascal@19515
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206 else
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pascal@22288
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207 ifndef NO386
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pascal@22288
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208 mov eax,[dword 1E6h]
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pascal@22288
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209 xor eax,'SKLE'
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pascal@22288
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210 else
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pascal@22288
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211 mov ax,[1E6h]
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pascal@22288
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212 xor ax,'LE'
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pascal@19905
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213 jne @@notelks
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pascal@22288
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214 mov ax,[1E8h]
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pascal@20481
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215 xor ax,'SK'
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pascal@22288
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216 endif
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pascal@22288
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217 endif
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pascal@20473
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218 jne @@notelks
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pascal@22288
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219 mov cx,100h ; DS=ES=SS=0100
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pascal@22288
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220 mov ss,cx
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pascal@22288
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221 push ss
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pascal@22288
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222 pop es
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pascal@22288
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223 mov cl,20h ; CS=0120
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pascal@22288
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224 push cx
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pascal@22288
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225 push ax ; IP=0000
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pascal@19515
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226 endif
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pascal@22179
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227 ifdef MOVE_SETUP
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pascal@22288
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228 @@notelks:
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pascal@22288
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229 mov ch,7Eh
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pascal@22288
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230 @@movsb@jmp:
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pascal@22288
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231 xor di,di
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pascal@22288
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232 rep
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pascal@22288
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233 movsb
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pascal@22179
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234 else
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pascal@22288
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235 ifndef noelks
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pascal@22288
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236 xchg ax,si
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pascal@22288
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237 mov ch,7Eh ; 0Ah min, 7Eh max
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pascal@22288
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238 @@movsb@jmp:
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pascal@22288
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239 xor di,di
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pascal@19515
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240 rep
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pascal@22288
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241 movsb
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pascal@19905
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242 @@notelks:
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pascal@22288
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243 endif
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pascal@19515
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244 endif
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pascal@19905
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245 @@isbzimage:
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pascal@19515
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246 push ss
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pascal@19515
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247 pop ds
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pascal@20475
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248 push ss
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pascal@20475
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249 pop es
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pascal@19636
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250 ifndef NO386
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pascal@19515
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251 push ss
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pascal@19515
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252 pop fs
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pascal@19515
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253 push ss
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pascal@19515
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254 pop gs
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pascal@19636
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255 endif
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pascal@19515
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256 assume nothing
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pascal@19515
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257 assume cs:DGROUP
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pascal@19515
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258 retf
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pascal@19515
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259
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pascal@20473
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260 step19code
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pascal@20477
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261
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pascal@20477
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262 endp _boot_kernel
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pascal@20477
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263
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pascal@19515
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264 movedend:
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pascal@19515
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265
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pascal@19515
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266 ends _TEXT
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pascal@19515
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267
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pascal@19515
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268 end
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pascal@19515
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269
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pascal@19515
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270 ;###### END OF FILE ############################################
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