last_table

LOCALS
    .model  tiny
    .code
    org 100h

main:
    call argparse

    cmp ax, 00h
    je @@next_step
    ret
@@next_step:

    ;старый запомнили, поменяли режим на новый
    call get_old_mode
    call get_old_page
    xor ax, ax
    mov al, [our_vm]
    ;call set_mode
    push ax
    mov al, [our_ap]
    ;call set_page
    push ax
    call change_vm

    ;узнали, сколько колонок в строке
    mov ah, 0fh
    int 10h
    mov [col_count], ah
    call get_column

    call set_base_addr
    call set_offset_addr

    ; вывели, какая сейчас страница, какой режим
    call write_header

    ; начальный символ
    mov dl, 0
    mov temp_column, 0

@start:
    mov al, dl

    call choose_color
    jmp @next

@temp_start:
    jmp @start

@next:
    call write_char

    inc offset_addr
    inc offset_addr

    inc dl
    inc temp_column

    call write_space

    inc offset_addr
    inc offset_addr


    add color, 11h
    cmp temp_column, 7
    jne @check
    mov color, 10h
@check:
    cmp temp_column, 14
    jne @next_s
    mov color, 10

@next_s:
    test dl, 15
    jne @start

    inc cur_str
    inc row

    mov al, [column]
    xor ah, ah
    mov bl, 4
    mul bl
    add offset_addr, ax
    mov temp_column, 0

    test dl, dl
    jne @temp_start

    mov ah, 00h
    int 16h

    xor ax, ax
    mov al, [old_vm]
    push ax
    mov al, [old_ap]
    push ax
    call change_vm

@@error:
    ret

write_header proc
    push ax
    push es
    push di

    mov ax, [base_addr]
    mov es, ax
    mov di, word ptr[row] - 2
    mov ah, 01h
    mov cx, 6
    mov al, offset page_str
    rep stosw

    add di, 6
    mov al, offset [our_ap]
    mov cx, 2
    rep stosw

    mov di, row - 1
    mov al, offset mode_str
    mov cx, 6
    rep stosw

    add di, 6
    mov al, offset [our_vm]
    mov cx, 2
    rep stosw

    pop di
    pop es
    pop ax

    ;mov dh, 1
    ;mov dl, column

    ;mov ah, 9h
    ;mov dx, offset page_str
    ;int 21h

    ;xor ax, ax
    ;mov al, [our_ap]
    ;call get_nums


    ;mov ah, 9h
    ;mov dx, offset  mode_str
    ;int 21h

    ;xor ax, ax
    ;mov al, [our_vm]
    ;call get_nums
    ;ret
write_header endp

get_old_mode proc
    push    ax
    push    bx
    push    ds

    xor     ax,ax
    mov     ds, ax
    mov     bh, ds:449h

    pop     ds
    mov     [old_vm], bh
    pop     bx
    pop     ax
    ret
get_old_mode endp


get_old_page proc
    push    ax
    push    bx
    push    ds

    xor     ax,ax
    mov     ds, ax
    mov     bh, ds:462h

    pop     ds
    mov     [old_ap], bh
    pop     bx
    pop     ax
    ret
get_old_page endp


set_mode proc
    ; в al режим, который надо установить
    push    ds
    push    si
    push    bx

    xor     bx, bx
    mov     ds, ax
    mov     si, 449h
    mov     ds:[si], al
;   stosb

    pop     bx
    pop     si
    pop     ds
    ret
set_mode endp


set_page proc
    ; в al страница, которую надо установить
    push    es
    push    di
    push    bx

    xor     bx, bx
    mov     es, ax
    mov     di, 462h
    stosb

    pop     bx
    pop     di
    pop     es
    ret
set_page endp


set_base_addr proc
    push ax
    cmp [our_vm], 7
    jne @@addr0b800
    mov ax, 0b000h
    jmp @@next

@@addr0b800:
    mov ax, 0b800h
    jmp @@next

@@next:
    mov [base_addr], ax
    pop ax
    ret
set_base_addr endp


set_offset_addr proc
    push    ax
    push    bx

    xor     ax, ax
    xor     bx, bx

    mov     al, [our_ap]
    mov     bl, [our_vm]
    cmp     bl, 01h
    jg      @@set_big_offset

    mov     bx, 0800h
    mul     bx
    jmp     @@end

@@set_big_offset:
    mov     bx, 1000h
    mul     bx
    jmp     @@end

@@end:
    push    bx
    push    ax
    mov     al, [row]
    mov     bl, [col_count]
    mul     bl
    add     ax, word ptr [column]
    mov     bx, 0002h
    mul     bx
    mov     bx, ax
    pop     ax
    add     ax, bx

    mov     [offset_addr], ax
    pop     bx

    pop     bx
    pop     ax
    ret
set_offset_addr endp


choose_color proc
    cmp cur_str, 0
    je @firstStr

    cmp cur_str, 1
    jne @next_str
    cmp blink, 0
    je @secondStr
    mov bl, sec_color_b
    ret

@next_str:
    cmp cur_str, 0eh
    je @lastStr

    cmp cur_str, 0fh
    je @lastStr

    mov bl, st_color
    ret

@firstStr:
    mov bl, color
    ret

@secondStr:
    mov bl, sec_color
    ret

@lastStr:
    mov bl, last_color
    ret
choose_color endp

write_space proc
    mov bl, prelast_sp
    cmp cur_str, 0eh
    je @@lastStr

    mov bl, last_sp_col
    cmp cur_str, 0fh
    je @@lastStr
    mov bl, 00h
    jmp @@end

@@lastStr:
    cmp temp_column, 14
    jg @@end

@@end:
    mov al, 20h
    call write_char
    ret
write_space endp


write_char proc
    ; в bl уже лежит цвет, в al уже лежит код символа
    push cx
    push es
    push di

    mov cx, [base_addr]
    mov es, cx
    mov cx, [offset_addr]
    mov di, [offset_addr]

    mov ah, bl

    stosw

    pop di
    pop es
    pop ax
    ret
write_char endp

change_vm proc
    push bp
    mov bp, sp
    push ax
    mov ah, 00h
    mov al, [bp+6] ;vm
    int 10h
    mov ah, 05h
    mov al, [bp+4] ;ap
    int 10h
    pop ax
    pop bp
    ret 4
change_vm endp

get_column proc
    sar ah, 1
    sub ah, 16
    mov column, ah
    ret
get_column endp


get_nums proc
    push -1
    mov bx, 10h
    xor cx, cx
    mov cx, 2
    xor dx, dx
    @@loop1:
        div bx
        push dx
        dec cx
        cmp cx, 0
        jne @@loop1

    xor cx, cx
    mov cx, 2
    xor dx, dx
    @@loop:
        pop dx
        cmp dx, -1
        je @@end

        cmp dl, 0ah
        jge @@more

        add dl, 30h
        jmp @@write
    @@more:
        add dl, 37h

    @@write:
        mov ah, 02h
        int 21h
    jmp @@loop
@@end:
ret
get_nums endp

argparse proc
    mov al, cs:[80h]
    cmp al, 6
    jl @@incorrect_args

    mov al, cs:[82h]
    cmp al, 30h
    jne @@error_mode
    mov al, cs:[83h]
    cmp al, 30h
    je @@correct_vm
    cmp al, 31h
    je @@correct_vm
    cmp al, 32h
    je @@correct_vm
    cmp al, 33h
    je @@correct_vm
    cmp al, 37h
    je @@correct_vm
    jmp @@error_mode

@@correct_vm:
    sub al, '0'
    mov [our_vm], al

    mov al, cs:[85h]
    cmp al, 30h
    jne @@incorrect_args

    mov al, cs:[86h]
    mov ah, cs:[83h]
    cmp ah, 37h
    jne @@check_other
    cmp al, 30h
    jne @@incorrect_page
    sub al, '0'
    mov [our_ap], al
    jmp @end

@@check_other:
    cmp al, 30h
    jl @@incorrect_page
    cmp al, 37h
    jg @@incorrect_page
    sub al, '0'
    mov [our_ap], al
    jmp @end

    @@error_mode:
        mov ah, 9h
        lea dx, incor_mode
        int 21h
        mov ax, 01h
        ret

    @@incorrect_args:
        mov ah, 9h
        lea dx, help
        int 21h
        mov ax, 02h
        ret

    @@incorrect_page:
        mov ah, 9h
        lea dx, incor_page
        int 21h
        mov ax, 03h
        ret

    @end:
        mov al, cs:[80h]
        cmp al, 9
        jne @@withBlink
        mov al, cs:[88h]
        cmp al, 2fh
        jne @@incorrect_args
        mov al, cs:[89h]
        cmp al, 62h
        jne @@incorrect_args
        mov blink, 01h
        jmp @@finish
    @@withBlink:
        mov blink, 0
    @@finish:
        mov ax, 00h

    ret
argparse endp


our_vm      db  ?
our_ap      db  ?
old_vm      db  ?
old_ap      db  ?
column      db  ?
temp_column db  ?
row         db  4
color       db  10h
st_color    db  07h
sec_color   db  81h
sec_color_b db  01h
last_color  db  4eh
cur_str     db  00h
last_sp_col db  11h
prelast_sp  db  22h
page_str    db  "Page: $"
mode_str    db  "Mode: $"
incor_mode  db  "Incorrect mode", 0dh, 0ah, "You can input 00, 01, 02, 03 or 07 mode", 0dh, 0ah, '$'
incor_args  db  "Incorrect args", 0dh, 0ah, '$'
help        db  "Args: [mode] [page]", 0dh, 0ah, "Mode: 00 | 01 | 02 | 03 | 07", 0dh, 0ah, '$'
incor_page  db  "Incorrect page", 0dh, 0ah, "You can input 00 page for 07 mode or 00-07 page for 00-03 mode", 0dh, 0ah, "$"
blink       db  ?
base_addr   dw  ?
offset_addr dw  ?
col_count   db  ?

end main


; для режимов 00h, 01h размер страницы 800h
; для остальных режимов размер страницы 1000h
; для режима 07h базовый адрес 0b000h
; для остальных режимов базовый адрес 0b800h