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Rev 89 Rev 103
Line 138... Line 138...
138 
    mov    dx, row*256 + column
 138 
    mov    dx, row*256 + column
139 
    call    setcursor
 139 
    call    setcursor
140 
}
 140 
}
Line 141... Line 141...
141 
 
 141 
 
- 
 
 142 
pagetable_set:
- 
 
 143 
;eax - physical address
- 
 
 144 
;es:di - page table
142 
pagetable_set:
 145 
;ecx - number of pages to map
143 
    or    al, 7
 146 
    or    al, 7
144 
@@:
 147 
@@:
145 
    stosd
 148 
    stosd
146 
    add    eax, 1000h
 149 
    add    eax, 1000h
Line 1045... Line 1048...
1045 
 
 1048 
 
1046 
        push    0x6000
 1049 
        push    0x6000
1047 
        pop    es                    ; es:di = 6000:0
 1050 
        pop    es                    ; es:di = 6000:0
1048 
        xor     di,di
 1051 
        xor     di,di
1049 
        mov     cx,256*map_mem         ; Map (mapmem) M
 - 
 
1050 
;        mov     eax,7
 - 
 
1051 
;       pt2:
 - 
 
1052 
;        cmp     cx,256*(map_mem-8)     ; 8 M map to LFB
 - 
 
1053 
;        jnz     pt3
 - 
 
1054 
;        pop     eax
 - 
 
1055 
;        add     eax,7
 - 
 
1056 
;       pt3:
 - 
 
1057 
;        cmp     cx,256*(map_mem-12)    ; 12 M back to linear = physical
 - 
 
1058 
;        jnz     pt4
 - 
 
1059 
;        mov     eax,12*0x100000 + 7
 - 
 
1060 
;       pt4:
 - 
 
1061 
;        stosd
 - 
 
1062 
;        add     eax,4096
 - 
 
1063 
;        loop    pt2
 1052 
        mov     cx,256*map_mem         ; Map (mapmem) M
1064 
; initialize as identity mapping
 1053 
; initialize as identity mapping
1065 
    xor    eax, eax
 1054 
    xor    eax, eax
1066 
    call    pagetable_set
 - 
 
1067 
; 8M..12M map to LFB
 - 
 
1068 
    pop    eax
 - 
 
1069 
;    mov    cx, 256*4
 - 
 
1070 
    mov    ch, 4
 - 
 
1071 
    mov    di, 2000h
 - 
 
Line 1072... Line -...
1072 
    call    pagetable_set
 - 
 
1073 
 
 - 
 
1074 
    push    0x7100
 - 
 
1075 
    pop    es
 - 
 
1076 
        xor     di,di
 - 
 
1077 
        mov     eax,8*0x100000
 - 
 
Line 1078... Line 1055...
1078 
        mov     cx,256*4
 1055 
    call    pagetable_set
Line 1079... Line 1056...
1079 
        call    pagetable_set
 1056 
 
1080
1057
1081 
; 4 KB PAGE DIRECTORY
 1058 
; 4 KB PAGE DIRECTORY
1082 
 
 1059 
 
1083 
    push    0x7F00
 1060 
    push    0x7F00
1084 
    pop    es                ; es:di = 7F00:0
 1061 
    pop    es                ; es:di = 7F00:0
1085 
        xor     di, di
 - 
 
1086 
        mov     cx, 64 / 4
 1062 
        xor     di, di
1087 
        mov     eax, 0x60007            ; for 0 M
 1063 
        mov     cx, 64 / 4
1088 
        call    pagetable_set
 1064 
        mov     eax, 0x60007            ; for 0 M
1089 
        mov     dword [es:0x800],0x71007   ;map region 0x80000000-0x803FFFFF to 0x800000-0xCFFFFF
 1065 
        call    pagetable_set