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