; ---- boot me! ----
; nasm -f bin -o bootcard.img bootcard.asm
-; cat bootcard.img >/dev/<usbstickdevice>
+; cat bootcard.img >/dev/<usbstick>
; reboot
org 7c00h
bits 16
- xor ax, ax
+nticks equ 7e00h
+tmoffs equ 7e04h
+muscur equ 7e08h
+
+%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, 6
+ rep stosw
+
+ mov word [32], tintr
+ mov [34], ax
+
+ stimer 0, 5966
mov ax, 13h
int 10h
+ push 1000h
+ pop es
- mov ax, 0a000h
- mov es, ax
- mov ax, 0303h
+ sti
+
+mainloop:
+ call drawbg
+
+ push ds
+ push es
+ push es
+ pop ds
+ push 0a000h
+ pop es
+ xor di, di
+ xor si, si
mov cx, 32000
+
+ mov dx, 3dah
+.invb: in al, dx
+ and al, 8
+ jnz .invb
+.novb: in al, dx
+ and al, 8
+ jz .novb
+
+ rep movsw
+ pop es
+ pop ds
+
+ setcur 10, 0
+ mov si, str1
+ call textout
+ setcur 12, 1
+ mov si, str2
+ call textout
+
+ jmp mainloop
+
+drawbg:
+ mov bx, 200
+ mov di, 5120
+.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, 100
+ imul bx, bx, 320
+ add bx, cx
+.mntcol:
+ mov byte [es:bx], 0
+ add bx, 320
+ cmp bx, 64000
+ jb .mntcol
- times 446-($-$$) db 0
- db 80h ; active partition
- db 20h ; start head
- db 21h ; start cylinder
- db 0 ; start sector
- db 0ch ; type
- db 28h ; last head
- db 20h ; last cylinder
- db 08h ; last sector
- dd 00000800h ; first lba
- dd 0001f800h ; number of sectors (lba)
+ dec cx
+ jnz .mnt
+
+ ret
+
+
+textout:
+ mov al, [si]
+ and al, al
+ jz .done
+ mov ah, 0eh
+ mov bx, 82
+ int 10h
+ inc si
+ jmp textout
+.done: ret
+
+tintr:
+ pusha
+ push ds
+ push word 0
+ pop ds
+ mov ax, [nticks]
+ inc ax
+ mov [nticks], ax
+
+ sub ax, [tmoffs]
+.pmus: mov bx, [muscur]
+ shl bx, 2
+ mov cx, [music + bx]
+ cmp cx, 0ffffh
+ jz .loop
+ cmp ax, cx
+ jb .eoi
+
+ inc word [muscur]
+ mov ax, [music + 2 + bx]
+ test ax, ax
+ jz .off
+ mov bx, ax
+ stimer 2, bx
+ spkon
+ jmp .eoi
+
+.off: spkoff
+.eoi: mov al, 20h
+ out 20h, al
+ pop ds
+ popa
+ iret
+
+.loop: neg cx
+ mov [muscur], cx
+ mov ax, [nticks]
+ mov [tmoffs], ax
+ jmp .pmus
+
+
+str1: db 'message blah',0
+str2: db 'Michael & Athena',0
+
+G2 equ 12175
+C3 equ 9121
+D3 equ 8126
+B2 equ 9664
+F3 equ 6833
+E3 equ 7239
+
+music: dw 0, 0
+ dw 40, G2
+ dw 200, C3
+ dw 320, C3
+ dw 360, C3
+ dw 600, 0
+ dw 680, G2
+ dw 840, D3
+ dw 960, B2
+ dw 1000, C3
+ dw 1240, 0
+ dw 1320, G2
+ dw 1480, C3
+ dw 1600, F3
+ dw 1640, F3
+ dw 1800, E3
+ dw 1920, D3
+ dw 1960, C3
+ dw 2120, B2
+ dw 2240, C3
+ dw 2280, D3
+ dw 2600, 0
+ dw 2760, 0
+ dw 0ffffh, 0
+
+w5: dw 5
+w30: dw 30
+
+ times 446-($-$$) db 0
+ dd 00212080h
+ dd 0820280ch
+ dd 00000800h
+ dd 0001f800h
times 510-($-$$) db 0
dw 0aa55h
projects / bootcard / blobdiff