I am writing an OS in fasm assembly and I faced with problem. I was trying to draw font pixel-by-pixel, but it is too hard and strange. I want to make bitmap pixel-by-pixel font and save it on hdd, and in kernel code make function, that can load it to video memory. I tried to google it, but without success. Help, please
Code of kernel:
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Macrosesmacro rect c, x, y, w, h { pusha mov bx, c mov cx, x mov dx, y mov si, w mov di, h call __rect popa}macro pixel c, x, y {rect c, x, y, 1, 1}macro __video__init { pusha ;mov ax, 0x4F02 ;mov bx, 0x101 ;int 0x10 mov ah, 0x00 mov al, 0x13 int 0x10 rect 0x00, 0, 0, 640*2, 480*2 popa}macro sym c, x, y, s { pusha xor bx, bx mov bx, c mov cx, x mov dx, y mov al, s call __sym popa}macro image x, y, w, h, addr { pusha mov si, x mov di, y mov [reg0], w mov [reg8], h mov bp, addr popa};;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Cosmeticsmacro return value { mov eax, valueret}macro far a { mov ax, a/16 mov ds, ax mov es, ax mul ax, 16 mov sp, ax div ax, 16 jmp ax:0x0000}macro rint trr { pusha mov bp, trr cmp bp, 0x10 popa je __r10h}macro retn {ret};;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Testsmacro __video__test { sym 0x0F, 0x00, 0x00, '!' sym 0x0F, 0x0F, 0x00, '"' sym 0x0F, 0x20, 0x00, '#' sym 0x0F, 0x30, 0x00, '$' sym 0x0F, 0x40, 0x00, '%' sym 0x0F, 0x50, 0x00, '&' sym 0x0F, 0x60, 0x00, "'" sym 0x0F, 0x70, 0x00, '(' sym 0x0F, 0x80, 0x00, ')' sym 0x0F, 0x90, 0x00, '*' sym 0x0F, 0xA0, 0x00, '+' sym 0x0F, 0xB0, 0x00, ',' sym 0x0F, 0xC0, 0x00, '-' sym 0x0F, 0xD0, 0x00, '.' sym 0x0F, 0xE0, 0x00, '/' sym 0x0F, 0xF0, 0x00, '0' sym 0x0F, 0x100,0x00, '1' image 0, 0, 320, 200, 0 call __frame};;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Kernel__kernel: org 0x7E00 mov [bootdev], dl;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Grafic Core __video__init ;rect 0x01, 0x00, 0x00, 0x280, 0x190 __video__test jmp $;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Bss buffer db 1024 dup (?) bootdev db 0x00 reg0 db 0x0000 reg1 db 0x0000 hexstr db '0x0000', 0x00 rstr db "Talisman's R-OS 0.0.1a", 0x00;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Funcs;;;;;;;;;;;;;;;;;;;;;; Bitmap font func__sym: cmp al, '!' je .! cmp al, '"' je ." cmp al, '#' je .sharp cmp al, '$' je .dollar cmp al, '%' je .% cmp al, '&' je .et cmp al, "'" je .' cmp al, '(' je .brt cmp al, ')' je .brt2 cmp al, '*' je .star cmp al, '+' je .plus cmp al, ',' je .comma cmp al, '-' je .menos cmp al, '.' je .point cmp al, '/' je .slash cmp al, '0' je .0 cmp al, '1' je .1 retn.!: add cx, 3 add dx, 4 rect bx, cx, dx, 2, 5 add dx, 7 rect bx, cx, dx, 2, 2 retn.": add cx, 2 add dx, 3 rect bx, cx, dx, 2, 3 add cx, 3 rect bx, cx, dx, 2, 3 retn.sharp: add cx, 2 add dx, 4 rect bx, cx, dx, 2, 8 add cx, 3 rect bx, cx, dx, 2, 8 sub cx, 4 inc dx rect bx, cx, dx, 7, 1 add dx, 4 rect bx, cx, dx, 7, 1 retn.dollar: add cx, 3 add dx, 2 rect bx, cx, dx, 2, 2 dec cx add dx, 2 rect bx, cx, dx, 4, 1 dec cx inc dx rect bx, cx, dx, 2, 2 add cx, 4 rect bx, cx, dx, 2, 2 sub cx, 3 add dx, 2 rect bx, cx, dx, 2, 1 add cx, 2 add dx, 1 rect bx, cx, dx, 2, 1 inc cx inc dx rect bx, cx, dx, 2, 2 sub cx, 4 rect bx, cx, dx, 2, 2 inc cx add dx, 2 rect bx, cx, dx, 4, 1 inc cx inc dx rect bx, cx, dx, 2, 2 retn.%: inc cx inc dx rect bx, cx, dx, 2, 1 dec cx inc dx rect bx, cx, dx, 1, 2 add cx, 3 rect bx, cx, dx, 1, 2 sub cx, 2 add dx, 2 rect bx, cx, dx, 2, 1 dec cx add dx, 5 rect bx, cx, dx, 1, 3 inc cx dec dx rect bx, cx, dx, 1, 3 inc cx dec dx rect bx, cx, dx, 1, 3 inc cx dec dx rect bx, cx, dx, 1, 3 inc cx dec dx rect bx, cx, dx, 1, 3 inc cx dec dx rect bx, cx, dx, 1, 3 inc cx dec dx rect bx, cx, dx, 1, 3 inc cx dec dx rect bx, cx, dx, 1, 3 sub cx, 2 add dx, 7 rect bx, cx, dx, 2, 1 dec cx inc dx rect bx, cx, dx, 1, 2 add cx, 3 rect bx, cx, dx, 1, 2 sub cx, 2 add dx, 2 rect bx, cx, dx, 2, 1 retn.et: add cx, 2 add dx, 3 rect bx, cx, dx, 3, 1 dec cx inc dx rect bx, cx, dx, 2 ,2 add cx, 3 rect bx, cx, dx, 2, 2 sub cx, 2 add dx, 2 rect bx, cx, dx, 3, 1 dec cx inc dx rect bx, cx, dx, 2, 4 add cx, 3 inc dx rect bx, cx, dx, 4, 1 inc cx inc dx rect bx, cx, dx, 2, 2 sub cx, 3 add dx, 2 rect bx, cx, dx, 3, 1 add cx, 4 rect bx, cx, dx, 2, 1 retn.': add cx, 3 add dx, 2 rect bx, cx, dx, 2, 3 retn.brt: add cx, 5 add dx, 2 pixel bx, cx, dx dec cx inc dx rect bx, cx, dx, 2, 1 dec cx inc dx rect bx, cx, dx, 2, 1 inc dx rect bx, cx, dx, 2, 1 dec cx inc dx rect bx, cx, dx, 2, 1 inc dx rect bx, cx, dx, 2, 1 inc cx inc dx rect bx, cx, dx, 2, 1 inc dx rect bx, cx, dx, 2, 1 inc cx inc dx rect bx, cx, dx, 2, 1 inc cx inc dx pixel bx, cx, dx retn.brt2: add cx, 3 add dx, 2 rect bx, cx, dx, 1, 2 ;inc cx ;inc dx ;rect bx, cx, dx, 1, 2 inc cx inc dx pixel bx, cx, dx inc dx rect bx, cx, dx, 2, 2 inc cx add dx, 2 rect bx, cx, dx, 2, 2 dec cx add dx, 2 rect bx, cx, dx, 2, 2 ;dec cx inc dx ;rect bx, cx, dx, 2, 1 dec cx inc dx rect bx, cx, dx, 2, 1 inc dx pixel bx, cx, dx retn.star: add cx, 3 add dx, 3 pixel bx, cx, dx sub cx, 2 inc dx rect bx, cx, dx, 5, 1 inc cx inc dx rect bx, cx, dx, 3, 1 inc dx pixel bx, cx, dx add cx, 2 pixel bx, cx, dx retn.plus: add cx, 3 add dx, 5 rect bx, cx, dx, 2, 5 sub cx, 2 add dx, 2 rect bx, cx, dx, 6, 1 retn.comma: add cx, 3 add dx, 10 rect bx, cx, dx, 2, 2 inc cx add dx, 2 pixel bx, cx, dx retn.menos: inc cx add dx, 7 rect bx, cx, dx, 6, 1 retn.point: add cx, 3 add dx, 10 rect bx, cx, dx, 2, 2 retn.slash: add dx, 9 rect bx, cx, dx, 1, 3 inc cx dec dx rect bx, cx, dx, 1, 3 inc cx dec dx rect bx, cx, dx, 1, 3 inc cx dec dx rect bx, cx, dx, 1, 3 inc cx dec dx rect bx, cx, dx, 1, 3 inc cx dec dx rect bx, cx, dx, 1, 3 inc cx dec dx rect bx, cx, dx, 1, 3 inc cx dec dx rect bx, cx, dx, 1, 3 retn.0: inc cx add dx, 3 rect bx, cx, dx, 2, 10 add cx, 4 rect bx, cx, dx, 2, 10 dec cx inc dx rect bx, cx, dx, 1, 3 dec cx add dx, 5 rect bx, cx, dx, 1, 3 dec cx sub dx, 7 rect bx, cx, dx, 4, 1 add dx, 11 rect bx, cx, dx, 4, 1 retn.1: add cx, 4 add dx, 2 rect bx, cx, dx, 2, 10 sub cx, 2 add dx, 2 rect bx, cx, dx, 3, 2 add dx, 6 rect bx, cx, dx, 6, 2 retn;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; fast putpix func__rect: push ds dx di imul dx, 320 add dx, cx mov ax, 0xA000 mov ds, ax jmp ._o._o: push si jmp ._i._i: dec si mov byte [edx+esi], bl;bx jnz ._i pop si add dx, 320 dec di jnz ._o pop di dx ds ret;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Image func__image: mov ah, 0x00 int 0x13 mov ah, 0x02 mov al, [reg8] imul al, 320 add al, 0x8700 add al, [reg0] idiv al, 512 mov bx, 0x8700+si+320*di mov es, 0x00 mov ch, 0x00 mov cl, (bp+512+0x7FFF-64000)/512 mov dh, 0x00 mov dl, [bootdev] int 0x13 ret__frame: mov ebx, 0x00000000._l: mov byte [ebx+0xA000], [ebx+0x8700] cmp ebx, 6400 je ._r jmp ._l._r: ret;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; R interrupts__r10h: sym bx, cx, dx, al;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Footer__footer: cli hlt jmp $-2 times 0x7FFF-64000-$+$$ db 0x00I hope my code will be more optimized in the future.