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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@21757
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15 group DGROUP _TEXT,_BSS
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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 _BSS byte public use16 'BSS'
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pascal@19515
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19
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pascal@19899
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20 global _imgs:dword
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pascal@19515
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21
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pascal@19515
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22 ends _BSS
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pascal@19515
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23
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pascal@19515
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24
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pascal@19515
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25 segment _TEXT byte public use16 'CODE'
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pascal@19515
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26
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pascal@19905
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27 ;***************************************************************
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pascal@20473
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28 ;void dos_shutdown()
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pascal@20473
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29 ;***************************************************************
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pascal@20473
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30
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pascal@20473
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31 macro dos_shutdown
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pascal@21342
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32 xor si,si
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pascal@21342
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33 mov ds,si
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pascal@20473
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34 ifndef NO386
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pascal@21342
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35 push [dword si+4] ; save step
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pascal@21342
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36 mov [word si+4],offset step19
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pascal@20473
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37 else
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pascal@20473
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38 mov ax,offset step19
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pascal@21342
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39 xchg ax,[word si+4]
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pascal@21342
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40 push [word si+6]
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pascal@20473
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41 push ax ; save step
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pascal@20473
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42 endif
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pascal@20473
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43 mov [word cs:sssp],sp
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pascal@21342
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44 ;cmp [byte si+7],0F0h
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pascal@20473
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45 ;jnc notdos
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pascal@21342
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46 mov [si+6],cs
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pascal@20473
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47 pushf
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pascal@20473
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48 pushf
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pascal@20473
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49 pop ax
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pascal@20473
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50 inc ah ; set TF
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pascal@20473
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51 push ax
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pascal@20473
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52 popf
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pascal@21342
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53 call [dword si+4*19h]
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pascal@20473
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54 notdos:
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pascal@20473
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55 ifndef NO386
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pascal@20473
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56 lss sp,[dword cs:sssp]
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pascal@20473
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57 else
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pascal@20473
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58 lds ax,[dword cs:sssp]
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pascal@20473
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59 push ds
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pascal@20473
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60 pop ss
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pascal@20473
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61 xchg ax,sp
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pascal@20473
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62 endif
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pascal@21342
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63 xor si,si
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pascal@21342
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64 mov ds,si
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pascal@21342
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65 pop [dword si+4] ; restore step
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pascal@20473
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66 endm
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pascal@20473
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67 macro step19code
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pascal@20473
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68 step19:
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pascal@21342
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69 push si
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pascal@20473
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70 push ds
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pascal@21342
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71 mov si,sp
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pascal@21342
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72 lds si,[dword ss:si+4] ; read cs:ip
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pascal@21342
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73 cmp [word si],19CDh ; int 19h ?
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pascal@20473
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74 pop ds
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pascal@21342
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75 pop si
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pascal@20473
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76 je notdos
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pascal@20473
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77 iret
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pascal@20473
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78 endm
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pascal@20473
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79
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pascal@20473
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80
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pascal@20473
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81 ;***************************************************************
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pascal@19905
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82 ;void boot_kernel();
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pascal@19905
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83 ;****** Never returns
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pascal@19905
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84 ;***************************************************************
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pascal@19903
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85 global _boot_kernel:near
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pascal@19905
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86 proc _boot_kernel near
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pascal@19905
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87
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pascal@21757
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88 ifdef NO386
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pascal@20142
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89 p8086
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pascal@19903
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90 else
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pascal@20142
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91 p386
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pascal@19903
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92 endif
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pascal@20473
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93 ;cli ; we start doing destructive things to DOS
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pascal@21757
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94 extrn sssp:word
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pascal@22288
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95 mov ax,[sssp+2]
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pascal@22288
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96 mov es,ax
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pascal@19571
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97 extrn _cmdline:word
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pascal@19571
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98 mov si,[_cmdline]
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pascal@19571
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99 mov di,8000h
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pascal@22288
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100 mov cx,2000h ; 4k for cmdline + 4k up to sp
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pascal@19571
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101 rep
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pascal@19571
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102 movsb
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pascal@22288
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103 push es
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pascal@22288
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104 pop ss
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pascal@22288
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105 mov sp,di
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pascal@22019
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106
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pascal@22288
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107 mov dx,2000h
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pascal@22288
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108 global _csip_hilo:word
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pascal@22288
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109 org $-2
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pascal@22288
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110 _csip_hilo dw ?
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pascal@22288
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111 xchg al,dh ; 9020 / 9000
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pascal@22288
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112 push ax
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pascal@22288
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113 push dx ; 0000 / 0042
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pascal@22288
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114
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pascal@22288
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115 mov cl,1 ; load high ?
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pascal@22179
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116 org $-1
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pascal@22288
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117 global _pm_low:byte
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pascal@22288
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118 _pm_low db ?
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pascal@22019
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119 push cx
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pascal@22019
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120 mov ax,[word ss:024Ch]
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pascal@22019
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121 xor ax,2b30h ; ipxe ?
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pascal@22019
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122 loopne @@notipxe
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pascal@22019
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123
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pascal@22019
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124 ; finish loading
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pascal@22019
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125 extrn @last_ditch$qv:near
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pascal@22008
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126 push cs
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pascal@22008
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127 call @last_ditch$qv
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pascal@22152
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128 dos_shutdown ; clear si; ds=0; kill VCPI
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pascal@22152
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129 push cs
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pascal@22152
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130 pop ds
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pascal@22019
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131
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pascal@22019
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132 @@notipxe:
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pascal@22019
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133 pop cx
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pascal@22019
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134 loop @@isbzimage
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pascal@22019
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135
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pascal@20477
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136 ; prepare memcpy32 size & srcofs param to move zImage pm
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pascal@21781
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137 ifndef NO386
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pascal@21781
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138 push 8 ; size hi
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pascal@21781
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139 else
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pascal@20477
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140 mov dx,8
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pascal@20477
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141 push dx ; size hi
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pascal@21781
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142 endif
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pascal@22288
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143 push si ; size lo=up to 512k
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pascal@22288
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144 push [dword _imgs+2] ; src ofs = pm.fallback
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pascal@20477
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145
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pascal@19538
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146 ;in al,70h
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pascal@19538
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147 ;or al,80h ; disable NMI
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pascal@19538
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148 ;out 70h,al
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pascal@20477
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149
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pascal@22288
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150 push si ; src seg=0
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pascal@21628
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151 inc cx
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pascal@21628
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152 push cx ; dst ofs hi
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pascal@22288
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153 push si ; dst ofs lo : 64k
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pascal@22288
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154
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pascal@22288
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155 ; self move
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pascal@22288
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156 extrn gdt_data
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pascal@22288
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157 mov cx,offset gdt_data+8
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pascal@22288
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158 ;xor di,di ; A000 -9000 -0800(>movedend)
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pascal@22288
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159
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pascal@22288
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160 ifdef NO386
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pascal@22288
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161 mov ax,ss
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pascal@22288
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162 add ax,900h
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pascal@22288
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163 push ax ; topseg()+0x0900
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pascal@22288
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164 else
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pascal@22288
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165 push 9800h+(4096/16) ; 4096 bytes for cmdline
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pascal@22288
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166 endif
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pascal@22288
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167 pop es
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pascal@22288
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168 push es
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pascal@22288
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169
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pascal@22288
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170 call near @@movsb@jmp ; movsb; pop cs ; ds=es=ss
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pascal@22288
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171
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pascal@20528
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172 extrn memcpy32:near
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pascal@20528
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173 call memcpy32
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pascal@19515
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174
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pascal@22176
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175 ifdef MOVE_SETUP
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pascal@22288
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176 mov si,0
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pascal@22288
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177 global _rm_offset:word
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pascal@22288
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178 org $-2
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pascal@22288
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179 _rm_offset dw ?
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pascal@22176
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180 ;xor di,di
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pascal@22288
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181 ;mov cx,8000h
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pascal@22176
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182 ;sub cx,si
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pascal@22288
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183 ;rep
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pascal@22288
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184 ; movsb
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pascal@22176
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185 endif
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pascal@22176
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186
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pascal@19515
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187 ifndef noelks
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pascal@22288
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188 ifdef MOVE_SETUP
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pascal@19515
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189 ifndef NO386
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pascal@22288
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190 mov eax,[dword si+1E6h]
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pascal@22288
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191 xor eax,'SKLE'
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pascal@22288
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192 else
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pascal@22288
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193 mov ax,[si+1E6h]
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pascal@22288
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194 xor ax,'LE'
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pascal@20473
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195 jne @@notelks
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pascal@22288
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196 mov ax,[si+1E8h]
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pascal@22288
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197 xor ax,'SK'
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pascal@22288
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198 endif
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pascal@19515
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199 else
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pascal@22288
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200 ifndef NO386
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pascal@22288
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201 mov eax,[dword 1E6h]
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pascal@22288
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202 xor eax,'SKLE'
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pascal@22288
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203 else
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pascal@22288
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204 mov ax,[1E6h]
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pascal@22288
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205 xor ax,'LE'
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pascal@19905
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206 jne @@notelks
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pascal@22288
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207 mov ax,[1E8h]
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pascal@20481
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208 xor ax,'SK'
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pascal@22288
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209 endif
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pascal@22288
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210 endif
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pascal@20473
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211 jne @@notelks
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pascal@22288
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212 mov cx,100h ; DS=ES=SS=0100
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pascal@22288
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213 mov ss,cx
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pascal@22288
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214 push ss
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pascal@22288
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215 pop es
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pascal@22288
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216 mov cl,20h ; CS=0120
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pascal@22288
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217 push cx
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pascal@22288
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218 push ax ; IP=0000
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pascal@19515
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219 endif
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pascal@22179
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220 ifdef MOVE_SETUP
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pascal@22288
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221 @@notelks:
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pascal@22288
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222 mov ch,7Eh
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pascal@22288
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223 @@movsb@jmp:
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pascal@22288
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224 xor di,di
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pascal@22288
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225 rep
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pascal@22288
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226 movsb
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pascal@22179
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227 else
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pascal@22288
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228 ifndef noelks
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pascal@22288
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229 xchg ax,si
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pascal@22288
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230 mov ch,7Eh ; 0Ah min, 7Eh max
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pascal@22288
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231 @@movsb@jmp:
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pascal@22288
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232 xor di,di
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pascal@19515
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233 rep
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pascal@22288
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234 movsb
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pascal@19905
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235 @@notelks:
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pascal@22288
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236 endif
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pascal@19515
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237 endif
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pascal@19905
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238 @@isbzimage:
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pascal@19515
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239 push ss
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pascal@19515
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240 pop ds
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pascal@20475
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241 push ss
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pascal@20475
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242 pop es
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pascal@19636
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243 ifndef NO386
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pascal@19515
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244 push ss
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pascal@19515
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245 pop fs
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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 gs
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pascal@19636
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248 endif
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pascal@19515
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249 assume nothing
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pascal@19515
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250 assume cs:DGROUP
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pascal@19515
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251 retf
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pascal@19515
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252
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pascal@20473
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253 step19code
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pascal@20477
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254
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pascal@20477
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255 endp _boot_kernel
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pascal@20477
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256
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pascal@19515
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257 movedend:
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pascal@19515
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258
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pascal@19515
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259 ends _TEXT
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pascal@19515
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260
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pascal@19515
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261 end
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pascal@19515
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262
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pascal@19515
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263 ;###### END OF FILE ############################################
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