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Index > DOS > 640*480*256 ascii library

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me239



Joined: 06 Jan 2011
Posts: 200
me239
Hey guys, here is a small ascii table for SVGA 640*480*256 mode. Here is how you use this library:
1) Put the following in your data
Code:
printf = library+2
set_vesa = library
library:
file 'ascii.sys'
    

2) Here are the inputs: DI = offset for text, AH = color, SI = NULL-terminated string

And that's it! This library is very limited, but it is simple to add your own characters.
code: save as ascii.sys
Code:
org 0
format binary as 'sys'
jmp set_vesa
jmp printf
set_vesa:
        push    ax bx
        mov     ax, 4f02h
        mov     bx, 100h
        int     10h
        pop     bx ax
        ret
printf:
        call    begin
begin:
        pop     bp
        sub     bp, begin
        mov     word[bp+cursor], di
        mov     byte[bp+color], ah
printf2:
        lodsb
        cmp     al, 0
        jz      printf_done
        cmp     al, 61h
        jb      printf_ok
        sub     al, 20h
printf_ok:
        push    si
        cmp     al, '!'
        jnz     @f
        lea     si, [bp+asciiexclamation]
        jmp     printf_cdone
@@:
        cmp     al, '~'
        jnz     @f
        lea     si, [bp+asciitilda]
        jmp     printf_cdone
@@:
        cmp     al, ':'
        jnz     @f
        lea     si, [bp+asciicolon]
        jmp     printf_cdone
@@:
        cmp     al, ';'
        jnz     @f
        lea     si, [bp+asciisemicolon]
        jmp     printf_cdone
@@:
        cmp     al, '+'
        jnz     @f
        lea     si, [bp+asciiplus]
        jmp     printf_cdone
@@:
        cmp     al, '='
        jnz     @f
        lea     si, [bp+asciiequal]
        jmp     printf_cdone
@@:
        cmp     al, '-'
        jnz     @f
        lea     si, [bp+asciiminus]
        jmp     printf_cdone
@@:
        cmp     al, '_'
        jnz     @f
        lea     si, [bp+asciiunder]
        jmp     printf_cdone
@@:
        cmp     al, '`'
        jnz     @f
        lea     si, [bp+asciiapost]
        jmp     printf_cdone
@@:
        cmp     al, '('
        jnz     @f
        lea     si, [bp+asciiparenth1]
        jmp     printf_cdone
@@:
        cmp     al, ')'
        jnz     @f
        lea     si, [bp+asciiparenth2]
        jmp     printf_cdone
@@:
        cmp     al, '*'
        jnz     @f
        lea     si, [bp+asciistar]
        jmp     printf_cdone
@@:
        cmp     al, '&'
        jnz     @f
        lea     si, [bp+asciiand]
        jmp     printf_cdone
@@:
        cmp     al, '^'
        jnz     @f
        lea     si, [bp+asciipower]
        jmp     printf_cdone
@@:
        cmp     al, '%'
        jnz     @f
        lea     si, [bp+asciipercent]
        jmp     printf_cdone
@@:
        cmp     al, '@'
        jnz     @f
        lea     si, [bp+asciiat]
        jmp     printf_cdone
@@:
        cmp     al, 31h
        jnz     @f
        lea     si, [bp+asciione]
        jmp     printf_cdone
@@:
        cmp     al, 32h
        jnz     @f
        lea     si, [bp+asciitwo]
        jmp     printf_cdone
@@:
        cmp     al, 33h
        jnz     @f
        lea     si, [bp+asciithree]
        jmp     printf_cdone
@@:
        cmp     al, 34h
        jnz     @f
        lea     si, [bp+asciifour]
        jmp     printf_cdone
@@:
        cmp     al, 35h
        jnz     @f
        lea     si, [bp+asciifive]
        jmp     printf_cdone
@@:
        cmp     al, 36h
        jnz     @f
        lea     si, [bp+asciisix]
        jmp     printf_cdone
@@:
        cmp     al, 37h
        jnz     @f
        lea     si, [bp+asciiseven]
        jmp     printf_cdone
@@:
        cmp     al, 38h
        jnz     @f
        lea     si, [bp+asciieight]
        jmp     printf_cdone
@@:
        cmp     al, 39h
        jnz     @f
        lea     si, [bp+asciinine]
        jmp     printf_cdone
@@:
        cmp     al, 30h
        jnz     @f
        lea     si, [bp+asciizero]
        jmp     printf_cdone
@@:
        cmp     al, 20h
        jnz     @f
        lea     si, [bp+asciispace]
        jmp     printf_cdone
@@:
        cmp     al, 24h
        jnz     @f
        lea     si, [bp+asciidollar]
        jmp     printf_cdone
@@:
        cmp     al, 41h
        jnz     @f
        lea     si, [bp+asciia]
        jmp     printf_cdone
@@:
        cmp     al, 42h
        jnz     @f
        lea     si, [bp+asciib]
        jmp     printf_cdone
@@:
        cmp     al, 43h
        jnz     @f
        lea     si, [bp+asciic]
        jmp     printf_cdone
@@:
        cmp     al, 44h
        jnz     @f
        lea     si, [bp+asciid]
        jmp     printf_cdone
@@:
        cmp     al, 45h
        jnz     @f
        lea     si, [bp+asciie]
        jmp     printf_cdone
@@:
        cmp     al, 46h
        jnz     @f
        lea     si, [bp+asciif]
        jmp     printf_cdone
@@:
        cmp     al, 47h
        jnz     @f
        lea     si, [bp+asciig]
        jmp     printf_cdone
@@:
        cmp     al, 48h
        jnz     @f
        lea     si, [bp+asciih]
        jmp     printf_cdone
@@:
        cmp     al, 49h
        jnz     @f
        lea     si, [bp+asciii]
        jmp     printf_cdone
@@:
        cmp     al, 4ah
        jnz     @f
        lea     si, [bp+asciij]
        jmp     printf_cdone
@@:
        cmp     al, 4bh
        jnz     @f
        lea     si, [bp+asciik]
        jmp     printf_cdone
@@:
        cmp     al, 4ch
        jnz     @f
        lea     si, [bp+asciil]
        jmp     printf_cdone
@@:
        cmp     al, 4dh
        jnz     @f
        lea     si, [bp+asciim]
        jmp     printf_cdone
@@:
        cmp     al, 4eh
        jnz     @f
        lea     si, [bp+asciin]
        jmp     printf_cdone
@@:
        cmp     al, 4fh
        jnz     @f
        lea     si, [bp+asciio]
        jmp     printf_cdone
@@:
        cmp     al, 50h
        jnz     @f
        lea     si, [bp+asciip]
        jmp     printf_cdone
@@:
        cmp     al, 51h
        jnz     @f
        lea     si, [bp+asciiq]
        jmp     printf_cdone
@@:
        cmp     al, 52h
        jnz     @f
        lea     si, [bp+asciir]
        jmp     printf_cdone
@@:
        cmp     al, 53h
        jnz     @f
        lea     si, [bp+asciis]
        jmp     printf_cdone
@@:
        cmp     al, 54h
        jnz     @f
        lea     si, [bp+asciit]
        jmp     printf_cdone
@@:
        cmp     al, 55h
        jnz     @f
        lea     si, [bp+asciiu]
        jmp     printf_cdone
@@:
        cmp     al, 56h
        jnz     @f
        lea     si, [bp+asciiv]
        jmp     printf_cdone
@@:
        cmp     al, 57h
        jnz     @f
        lea     si, [bp+asciiw]
        jmp     printf_cdone
@@:
        cmp     al, 58h
        jnz     @f
        lea     si, [bp+asciix]
        jmp     printf_cdone
@@:
        cmp     al, 59h
        jnz     @f
        lea     si, [bp+asciiy]
        jmp     printf_cdone
@@:
        cmp     al, 5ah
        jnz     @f
        lea     si, [bp+asciiz]
        jmp     printf_cdone
@@:
        cmp     al, '/'
        jnz     @f
        lea     si, [bp+asciislash]
        jmp     printf_cdone
@@:
        cmp     al, '#'
        jnz     @f
        lea     si, [bp+asciipound]
        jmp     printf_cdone
@@:
        cmp     al, '<'
        jnz     @f
        lea     si, [bp+asciicarrot]
        jmp     printf_cdone
@@:
        cmp     al, '>'
        jnz     @f
        lea     si, [bp+asciicarrot2]
        jmp     printf_cdone
@@:
printf_cdone:
        call    printchar
        pop     si
        jmp     printf2
printf_done:
        ret
printchar:
        mov     di, word[bp+cursor]
        mov     cx, word[si]
        add     si, 2
        push    cx di
        push    0a000h
        pop     es
@@:
        mov     ch, 0
        lodsb
        cmp     al,0
        jz      printchar_notzero
        mov     al, byte[bp+color]
printchar_notzero:
        stosb
        inc     word[bp+count]
        loop    @b
        pop     di cx
        dec     ch
        jz      char_done
        add     di, 640d
        push    cx di
        jmp     @b
char_done:
        mov     byte[bp+comp], cl
        mov     cx, word[bp+comp]
        add     word[bp+cursor], cx
        ret
count   dw      0
comp    dw      0
cursor  dw      0
color   db      07h
asciia:
        db 6, 5
        db 0,0,1,1,0,0
        db 0,1,0,0,1,0
        db 0,1,1,1,1,0
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
asciib:
        db 6,5
        db 0,1,1,1,0,0
        db 0,1,0,0,1,0
        db 0,1,1,1,1,0
        db 0,1,0,0,1,0
        db 0,1,1,1,0,0
asciic:
        db 6,5
        db 0,1,1,1,0,0
        db 0,1,0,0,0,0
        db 0,1,0,0,0,0
        db 0,1,0,0,0,0
        db 0,1,1,1,0,0
asciid:
        db 6,5
        db 0,1,1,1,0,0
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
        db 0,1,1,1,0,0
asciie:
        db 6,5
        db 0,1,1,1,1,0
        db 0,1,0,0,0,0
        db 0,1,1,1,1,0
        db 0,1,0,0,0,0
        db 0,1,1,1,1,0
asciif:
        db 6,5
        db 0,1,1,1,1,0
        db 0,1,0,0,0,0
        db 0,1,1,1,1,0
        db 0,1,0,0,0,0
        db 0,1,0,0,0,0
asciig:
        db 6,5
        db 0,1,1,1,1,0
        db 0,1,0,0,0,0
        db 0,1,0,1,1,0
        db 0,1,0,0,1,0
        db 0,1,1,1,1,0
asciih:
        db 6,5
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
        db 0,1,1,1,1,0
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
asciii:
        db 6,5
        db 0,1,1,1,0,0
        db 0,0,1,0,0,0
        db 0,0,1,0,0,0
        db 0,0,1,0,0,0
        db 0,1,1,1,0,0
asciij:
        db 6,5
        db 0,0,1,1,1,0
        db 0,0,0,1,0,0
        db 0,0,0,1,0,0
        db 0,1,0,1,0,0
        db 0,1,1,1,0,0
asciik:
        db 6,5
        db 0,1,0,0,1,0
        db 0,1,0,1,0,0
        db 0,1,1,0,0,0
        db 0,1,0,1,0,0
        db 0,1,0,0,1,0
asciil:
        db 6,5
        db 0,1,0,0,0,0
        db 0,1,0,0,0,0
        db 0,1,0,0,0,0
        db 0,1,0,0,0,0
        db 0,1,1,1,1,0
asciim:
        db 6,5
        db 0,1,0,0,1,0
        db 0,1,1,1,1,0
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
asciin:
        db 6,5
        db 0,1,0,0,1,0
        db 0,1,1,0,1,0
        db 0,1,0,1,1,0
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
asciio:
        db 6,5
        db 0,0,1,1,0,0
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
        db 0,0,1,1,0,0
asciip:
        db 6,5
        db 0,1,1,1,1,0
        db 0,1,0,0,1,0
        db 0,1,1,1,1,0
        db 0,1,0,0,0,0
        db 0,1,0,0,0,0
asciiq:
        db 6,5
        db 0,0,1,1,0,0
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
        db 0,1,0,1,1,0
        db 0,0,1,1,1,1
asciir:
        db 6,5
        db 0,1,1,1,1,0
        db 0,1,0,0,1,0
        db 0,1,1,1,1,0
        db 0,1,0,1,0,0
        db 0,1,0,0,1,0
asciis:
        db 6,5
        db 0,1,1,1,1,0
        db 0,1,0,0,0,0
        db 0,1,1,1,1,0
        db 0,0,0,0,1,0
        db 0,1,1,1,1,0
asciit:
        db 6,5
        db 0,1,1,1,0,0
        db 0,0,1,0,0,0
        db 0,0,1,0,0,0
        db 0,0,1,0,0,0
        db 0,0,1,0,0,0
asciiu:
        db 6,5
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
        db 0,0,1,1,0,0
asciiv:
        db 6,5
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
        db 0,0,1,1,0,0
        db 0,0,1,1,0,0
asciiw:
        db 6,5
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
        db 0,1,1,1,1,0
        db 0,1,0,0,1,0
asciix:
        db 6,5
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
        db 0,0,1,1,0,0
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
asciiy:
        db 6,5
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
        db 0,0,1,1,0,0
        db 0,0,1,0,0,0
        db 0,1,0,0,0,0
asciiz:
        db 6,5
        db 0,1,1,1,1,0
        db 0,0,0,1,0,0
        db 0,0,1,0,0,0
        db 0,1,0,0,0,0
        db 0,1,1,1,1,0
asciione:
        db 6,5
        db 0,0,1,1,0,0
        db 0,0,1,1,0,0
        db 0,0,1,1,0,0
        db 0,0,1,1,0,0
        db 0,0,1,1,0,0
asciitwo:
        db 6,5
        db 0,1,1,1,1,0
        db 0,0,0,0,1,0
        db 0,1,1,1,1,0
        db 0,1,0,0,0,0
        db 0,1,1,1,1,0
asciithree:
        db 6,5
        db 0,1,1,1,1,0
        db 0,0,0,0,1,0
        db 0,1,1,1,1,0
        db 0,0,0,0,1,0
        db 0,1,1,1,1,0
asciifour:
        db 6,5
        db 0,1,1,1,1,0
        db 0,1,0,0,1,0
        db 0,1,1,1,1,0
        db 0,0,0,0,1,0
        db 0,0,0,0,1,0
asciifive:
        db 6,5
        db 0,1,1,1,1,0
        db 0,1,0,0,0,0
        db 0,1,1,1,1,0
        db 0,0,0,0,1,0
        db 0,1,1,1,1,0
asciisix:
        db 6,5
        db 0,1,0,0,0,0
        db 0,1,0,0,0,0
        db 0,1,1,1,1,0
        db 0,1,0,0,1,0
        db 0,1,1,1,1,0
asciiseven:
        db 6,5
        db 0,1,1,1,1,0
        db 0,0,0,0,1,0
        db 0,0,0,0,1,0
        db 0,0,0,0,1,0
        db 0,0,0,0,1,0
asciieight:
        db 6,5
        db 0,1,1,1,1,0
        db 0,1,0,0,1,0
        db 0,1,1,1,1,0
        db 0,1,0,0,1,0
        db 0,1,1,1,1,0
asciinine:
        db 6,5
        db 0,1,1,1,1,0
        db 0,1,0,0,1,0
        db 0,1,1,1,1,0
        db 0,0,0,0,1,0
        db 0,0,0,0,1,0
asciizero:
        db 6,5
        db 0,0,1,1,0,0
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
        db 0,1,0,0,1,0
        db 0,0,1,1,0,0
asciislash:
        db 6,5
        db 0,0,0,0,1,0
        db 0,0,0,1,1,0
        db 0,0,1,1,0,0
        db 0,1,1,0,0,0
        db 0,1,0,0,0,0
asciiexclamation:
        db 6,5
        db 0,0,1,1,0,0
        db 0,0,1,1,0,0
        db 0,0,1,1,0,0
        db 0,0,0,0,0,0
        db 0,0,1,1,0,0
asciispace:
        db 6,5
        db 0,0,0,0,0,0
        db 0,0,0,0,0,0
        db 0,0,0,0,0,0
        db 0,0,0,0,0,0
        db 0,0,0,0,0,0
asciicolon:
        db 6,5
        db 0,0,1,1,0,0
        db 0,0,1,1,0,0
        db 0,0,0,0,0,0
        db 0,0,1,1,0,0
        db 0,0,1,1,0,0
asciisemicolon:
        db 6,5
        db 0,0,1,1,0,0
        db 0,0,1,1,0,0
        db 0,0,0,0,0,0
        db 0,0,1,1,0,0
        db 0,0,0,1,0,0
asciiapost:
        db 6,5
        db 1,1,0,0,0,0
        db 0,1,1,0,0,0
        db 0,0,0,0,0,0
        db 0,0,0,0,0,0
        db 0,0,0,0,0,0
asciiminus:
        db 6,5
        db 0,0,0,0,0,0
        db 0,0,0,0,0,0
        db 0,1,1,1,1,0
        db 0,0,0,0,0,0
        db 0,0,0,0,0,0
asciiunder:
        db 6,5
        db 0,0,0,0,0,0
        db 0,0,0,0,0,0
        db 0,0,0,0,0,0
        db 0,0,0,0,0,0
        db 0,1,1,1,1,0
asciiequal:
        db 6,5
        db 0,0,0,0,0,0
        db 0,1,1,1,1,0
        db 0,0,0,0,0,0
        db 0,1,1,1,1,0
        db 0,0,0,0,0,0
asciiplus:
        db 6,5
        db 0,0,1,0,0,0
        db 0,0,1,0,0,0
        db 1,1,1,1,1,0
        db 0,0,1,0,0,0
        db 0,0,1,0,0,0
asciitilda:
        db 6,5
        db 0,0,0,0,0,0
        db 0,1,1,0,1,1
        db 1,0,1,1,0,0
        db 0,0,0,0,0,0
        db 0,0,0,0,0,0
asciipower:
        db 6,5
        db 0,0,1,1,0,0
        db 0,1,1,1,1,0
        db 0,1,0,0,1,0
        db 0,0,0,0,0,0
        db 0,0,0,0,0,0
asciistar:
        db 6,5
        db 0,1,0,0,1,0
        db 0,1,1,1,1,0
        db 0,1,1,1,1,0
        db 0,1,0,0,1,0
        db 0,0,0,0,0,0
asciiand:
        db 6,5
        db 0,0,1,1,1,0
        db 0,1,0,0,0,0
        db 0,1,1,0,1,0
        db 0,1,0,1,0,0
        db 0,1,1,1,1,0
asciiparenth1:
        db 6,5
        db 0,0,1,1,0,0
        db 0,1,1,0,0,0
        db 0,1,1,0,0,0
        db 0,1,1,1,0,0
        db 0,0,1,1,0,0
asciiparenth2:
        db 6,5
        db 0,0,1,1,0,0
        db 0,0,0,1,1,0
        db 0,0,0,1,1,0
        db 0,0,0,1,1,0
        db 0,0,1,1,0,0
asciipercent:
        db 6,5
        db 0,1,1,0,1,0
        db 0,1,1,1,1,0
        db 0,0,1,1,0,0
        db 0,1,1,1,1,0
        db 0,1,0,1,1,0
asciidollar:
        db 6,5
        db 0,1,1,1,1,0
        db 0,1,0,1,0,0
        db 0,1,1,1,1,0
        db 0,0,0,1,1,0
        db 0,1,1,1,1,0
asciiat:
        db 6,5
        db 0,0,1,1,0,0
        db 0,1,0,1,1,0
        db 0,1,1,0,1,0
        db 0,1,0,1,0,0
        db 0,0,1,1,0,0
asciipound:
        db 6,5
        db 0,0,1,0,1,0
        db 1,1,1,1,1,1
        db 0,1,0,0,1,0
        db 1,1,1,1,1,1
        db 0,1,0,1,0,0
asciicarrot:
        db 6,5
        db 0,0,0,1,1,0
        db 0,0,1,1,0,0
        db 0,1,1,0,0,0
        db 0,0,1,1,0,0
        db 0,0,0,1,1,0
asciicarrot2:
        db 6,5
        db 0,1,1,0,0,0
        db 0,0,1,1,0,0
        db 0,0,0,1,1,0
        db 0,0,1,1,0,0
        db 0,1,1,0,0,0    

example program using library
Code:
org 100h
start:
        call    set_vesa
        mov     si, msg
        mov     ah, 7
        xor     di, di
        call    printf
        int     20h
msg     db      "123", 0
set_vesa = library
printf = library+2
library:
file 'ascii.sys'    
Post 02 Jun 2011, 07:20
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Dex4u



Joined: 08 Feb 2005
Posts: 1601
Location: web
Dex4u
Does this only write to the top of screen ?, as i thought this mode uses 64k box's.
Post 02 Jun 2011, 18:38
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me239



Joined: 06 Jan 2011
Posts: 200
me239
Dex4u wrote:
Does this only write to the top of screen ?, as i thought this mode uses 64k box's.
Yes, it only writes to the top of the screen. I intend to write some bank switching code soon.
Post 02 Jun 2011, 23:35
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