; ---- boot me! ----
; nasm -f bin -o bootcard.img bootcard.asm
-; cat bootcard.img >/dev/<usbstickdevice>
-; reboot
+; cat bootcard.img >/dev/<usbstick>
org 7c00h
bits 16
- xor ax, ax
+barh equ 4
+nbars equ 11
+barstart equ 200 - (nbars+1) * barh
+
+nticks equ 7e00h
+tmoffs equ 7e04h
+musptr equ 7e08h
+frame equ 7e0ch
+fval equ 7e10h
+cmap equ 7e14h
+
+%macro setcur 2
+ mov dx, %1 | (%2 << 8)
+ xor bx, bx
+ mov ah, 2
+ int 10h
+%endmacro
+%macro spkon 0
+ in al, 61h
+ or al, 3
+ out 61h, al
+%endmacro
+%macro spkoff 0
+ in al, 61h
+ and al, 0fch
+ out 61h, al
+%endmacro
+%macro stimer 2
+ mov al, (%1 << 6) | 36h
+ out 43h, al
+ mov ax, %2
+ out 40h + %1, al
+ mov al, ah
+ out 40h + %1, al
+%endmacro
+
+start: xor ax, ax
mov ds, ax
+ mov es, ax
mov ss, ax
+ mov sp, 7c00h
+
+ mov di, nticks
+ mov cx, 16
+ rep stosw
+
+ cli
+ mov word [32], tintr
+ mov [34], ax
+
+ stimer 0, 5966
mov ax, 13h
int 10h
+ push 0a000h
+ pop es
- mov ax, 0a000h
- mov es, ax
- mov ax, 0303h
- mov cx, 32000
+
+ mov al, 16
+ mov di, barstart * 320
+ mov bx, nbars
+.drawbars:
+ mov cx, barh * 320
+ rep stosb
+ inc al
+ dec bx
+ jnz .drawbars
+
+ setcur 12, 16
+ mov si, str1
+ call textout
+
+ sti
+
+mainloop:
+ mov dx, 3dah
+.invb: in al, dx
+ and al, 8
+ jnz .invb
+.novb: in al, dx
+ and al, 8
+ jz .novb
+
+drawbg:
+ mov bx, 200
+ xor di, di
+.fillgrad:
+ mov ax, bx
+ mov ah, al
+ mov cx, 2400 ; 15 lines
rep stosw
+ inc bx
+ cmp bx, 208
+ jnz .fillgrad
-infloop:
- hlt
- jmp infloop
+ ; mountains
+ mov cx, 320
+ mov bp, sp
+.mnt: mov [bp - 2], cx
+ fild word [bp - 2]
+ fidiv word [w30]
+ fsincos
+ fiadd word [w5]
+ fimul word [w5]
+ fistp word [bp - 2]
+ fstp st0
+ mov bx, [bp - 2]
+ add bx, 84
+ imul bx, bx, 320
+ add bx, cx
+.mntcol:
+ mov byte [es:bx], 0
+ add bx, 320
+ cmp bx, 128 * 320
+ jb .mntcol
- times 446-($-$$) db 0
- db 80h ; active partition
- db 20h ; start head
- db 21h ; start cylinder
- db 0 ; start sector
- db 0ch ; type
- db 28h ; last head
- db 20h ; last cylinder
- db 08h ; last sector
- dd 00000800h ; first lba
- dd 0001f800h ; number of sectors (lba)
+ dec cx
+ jnz .mnt
+
+ ; upd colormap
+ mov dx, 3c8h
+ mov al, 16
+ out dx, al
+ inc dx
+ mov si, cmap
+ mov cx, 16 * 3
+ rep outsb
+ jmp mainloop
+
+textout:
+ mov al, [si]
+ and al, al
+ jz .done
+ mov ah, 0eh
+ mov bx, 82
+ int 10h
+ inc si
+ jmp textout
+.done: ret
+
+
+tintr:
+ pusha
+ mov ax, [nticks]
+ inc ax
+ mov [nticks], ax
+
+ mov bx, [musptr]
+ cmp bx, 22*3
+ jnz .skiploop
+ xor bx, bx
+ mov [tmoffs], ax
+.skiploop:
+ xor cx, cx
+ mov cl, [music + bx]
+ shl cx, 4
+ sub ax, [tmoffs]
+ cmp ax, cx
+ jb .end
+
+ mov ax, [music + 1 + bx]
+ add bx, 3
+ mov [musptr], bx
+ test ax, ax
+ jz .off
+
+ mov bx, ax
+ shr bx, 9
+ sub bx, 13
+ imul bx, bx, 3
+ mov byte [cmap + bx], 3fh
+ mov word [cmap + bx + 1], 2f2fh
+
+ mov bx, ax
+ stimer 2, bx
+ spkon
+ jmp .end
+
+.off: spkoff
+
+.end: test word [nticks], 1
+ jnz .eoi
+ mov cx, 16 * 3
+ mov si, cmap
+.fadecol:
+ lodsb
+ test al, al
+ jz .skipdec
+ dec al
+ mov [si-1], al
+.skipdec:
+ dec cx
+ jnz .fadecol
+
+.eoi: mov al, 20h
+ out 20h, al
+ popa
+ iret
+
+str1: db 'Michael ',3,' Athena',0
+
+music: dd 0a2f8f00h, 0a11123a1h, 23a11423h, 28000023h, 0be322f8fh, 25c0391fh
+ dd 4b23a13ch, 8f500000h, 23a15a2fh, 641ab161h, 476e1ab1h, 1fbe751ch
+ dd 8223a178h, 0a18925c0h, 1fbe8c23h, 0aa0000a0h
+ dw 0
+
+w5: dw 5
+w30: dw 30
+
+ times 446-($-$$) db 0
+ dd 00212080h
+ dd 0820280ch
+ dd 00000800h
+ dd 0001f800h
times 510-($-$$) db 0
dw 0aa55h
-
; vi:ft=nasm ts=8 sts=8 sw=8:
projects / bootcard / blobdiff