BOS forums / Mode 13h text printing (Primitive).

Nelson · 2005-07-02 05:41:40

Code:

printFont:
    push eax
   
    mov bx, ax
    mov cx, dx
   
    jmp .startLoop
   
    .startLoop:   
        lodsb
       
        cmp al, '*'
        je .equalsStar
       
        cmp al, ' '
        je .equalsSpace
       
        cmp al, 0x00
        je .equalsNL
       
        cmp al, 0x10
        je .equalsEnd
           
    .equalsStar:
        inc bx
        mov al, 0x03
        call put_0x13_pixel
       
        jmp .startLoop
       
    .equalsSpace:
        inc bx
        mov al, 0x00
        call put_0x13_pixel
       
        jmp .startLoop
       
    .equalsNL:
        inc cx
        pop eax
        mov bx, ax
        push eax
       
        jmp .startLoop
       
    .equalsEnd:
        ret

and how to use it:

Code:

        LetterA:
            db '***',0x00
            db '*  *',0x00
            db '***',0x00
            db '*  *',0x00, 0x10
           
        font_test:
            mov      ax, 1                   ; clear the screen
            call      set_mode_0x13     ; set mode 0x13
       
            mov esi, LetterA
            call printFont

For some reason it never returns *tear* but it DOES work

Have fun.

Dex4u · 2005-07-02 12:04:05

It does not return because of your stack, add pop eax on ending like this:

Code:

.equalsEnd:
        pop   eax
        ret

But still a nice bit of code .

Nelson · 2005-07-02 15:49:10

Haha, can't believe I didn't think of that. Thanks

Nelson · 2005-07-02 17:26:10

http://www.javaop.com/uploads/guest/BOSNice.PNG

Me playing around with the fonts and a window code I wrote

bubach · 2005-07-21 17:13:07

Cool, I missed this thread..
So, have you implemented the mouse code to this yet?
Keep up the great work..

/ Christoffer

http://www.asmhackers.net/

Nelson · 2005-08-01 00:47:00

Well I started working on it having very little knowledge in how a mouse driver worked.
I plan to read more into it and attempt to write one directly to ASM instead of porting Sanik's over.

I believe I still have the code
Yep: http://www.advancedcontent.net/warrior/ … /mouse.inc

Dex4u · 2005-08-01 15:38:00

Sorry Nelson,
i did not know you was working on a mouse driver for BOS, as i have just ported the driver from "Dex4u" over to BOS, i have sent the code to bubach for testing, seting up as he wants.
If i had known you was working on a driver, i would not of ported my mouse driver.

Nelson · 2005-08-01 19:42:35

No problem, it's the fact that it got done.
Had you done it or I done it doesn't make a difference.
Good job.

bubach · 2005-08-01 19:47:28

Yeah, thanks a lot!
Gonna test it asap. But unfortunate, i started working again ( just for this week, though ).. Too bad that I need money for cool tech stuff, otherwise I could have spended all my summer hacking on BOS instead..

http://www.asmhackers.net/

Nelson · 2005-08-01 19:55:30

I got summer school so no more late nights with me and an assembler unfortunately

Dex4u · 2005-08-01 20:17:44

No work, no play, is a saying in the UK.

#1 2005-07-02 05:41:40

Mode 13h text printing (Primitive).

Code:

Code:

#2 2005-07-02 12:04:05

Re: Mode 13h text printing (Primitive).

Code:

#3 2005-07-02 15:49:10

Re: Mode 13h text printing (Primitive).

#4 2005-07-02 17:26:10

Re: Mode 13h text printing (Primitive).

#5 2005-07-21 17:13:07

Re: Mode 13h text printing (Primitive).

#6 2005-08-01 00:47:00

Re: Mode 13h text printing (Primitive).

#7 2005-08-01 15:38:00

Re: Mode 13h text printing (Primitive).

#8 2005-08-01 19:42:35

Re: Mode 13h text printing (Primitive).

#9 2005-08-01 19:47:28

Re: Mode 13h text printing (Primitive).

#10 2005-08-01 19:55:30

Re: Mode 13h text printing (Primitive).

#11 2005-08-01 20:17:44

Re: Mode 13h text printing (Primitive).

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