data_start equ 7e00h
nticks equ data_start
-muscur equ nticks + 4
+tmoffs equ nticks + 4
+muscur equ tmoffs + 4
+data_end equ muscur + 4
-osc_freq equ 1193182
+backbuf_seg equ 1000h
+
+OSC_FREQ equ 1193182
PIT_DATA0 equ 40h
-PIT_DATA2 equ 42h
PIT_CMD equ 43h
PIT_CMD_CHAN0 equ 00h
-PIT_CMD_CHAN1 equ 40h
-PIT_CMD_CHAN2 equ 80h
PIT_CMD_HILO equ 30h
PIT_CMD_SQWAVE equ 06h
KB_CTRL equ 61h
%define DIV_ROUND(a, b) ((a) / (b) + ((a) % (b)) / ((b) / 2))
%macro setcursor 2
- mov dl, %1
- mov dh, %2
+ mov dx, %1 | (%2 << 8)
xor bx, bx
mov ah, 2
int 10h
out PIT_DATA0 + %1, al
%endmacro
- xor ax, ax
+start: xor ax, ax
mov ds, ax
+ mov es, ax
mov ss, ax
mov sp, 7c00h
- mov dword [nticks], 0
- mov dword [muscur], 0
+ mov di, data_start
+ mov cx, (data_end - data_start) / 2
+ rep stosw
+
mov word [32], timer_intr
- mov word [34], 0
+ mov [34], ax
- settimer 0, DIV_ROUND(osc_freq, 250)
+ settimer 0, DIV_ROUND(OSC_FREQ, 200)
mov ax, 13h
int 10h
- mov ax, 0a000h
- mov es, ax
+ push backbuf_seg
+ pop es
- mov ax, 0303h
- mov cx, 32000
+ sti
+
+mainloop:
+ call drawbg
+
+ push ds
+ push es
+ push es
+ pop ds
+ push 0a000h
+ pop es
xor di, di
- rep stosw
+ 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
- setcursor 10, 12
+ setcursor 10, 0
mov si, str1
call textout
- setcursor 12, 13
+ setcursor 12, 1
mov si, str2
call textout
- sti
+ 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
+
+ ; 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]
+ ;fistp word [bp - 4]
+ 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
+
+ dec cx
+ jnz .mnt
+
+ ret
-infloop:
- hlt
- jmp infloop
textout:
mov al, [si]
and al, al
jz .done
mov ah, 0eh
- mov bx, 0fh
+ mov bx, 82
int 10h
inc si
jmp textout
.done: ret
timer_intr:
+ pusha
+ push ds
+ push word 0
+ pop ds
mov ax, [nticks]
inc ax
mov [nticks], ax
- mov bx, [muscur]
+ sub ax, [tmoffs]
+.pmus: mov bx, [muscur]
shl bx, 2
- mov cx, [music + bx]
+ mov cx, [music + bx] ; event time
cmp cx, 0ffffh
- jz .off
+ jz .loop
cmp ax, cx
jb .eoi
- inc dword [muscur]
- mov ax, [music + 2 + bx] ; grab timeout
+ inc word [muscur]
+ mov ax, [music + 2 + bx] ; event counter reload
test ax, ax
jz .off
mov bx, ax
-
settimer 2, bx
spkon
jmp .eoi
.eoi: mov al, 20h
out 20h, al ; EOI
+ pop ds
+ popa
iret
+.loop: neg cx
+ mov [muscur], cx
+ mov ax, [nticks]
+ mov [tmoffs], ax
+ jmp .pmus
+
+
str1: db 'message message blah',0
-str2: db 'Michael & Athina',0
-
-music:
- dw 0, 500
- dw 10, 0
- dw 20, 2000
- dw 30, 0
- dw 40, 500
- dw 50, 0
- dw 60, 2000
- dw 70, 0
+str2: db 'Michael & Athena',0
+
+G2 equ 12175
+C3 equ 9121
+D3 equ 8126
+B2 equ 9664
+F3 equ 6833
+E3 equ 7239
+
+%define TM(x) (40 + (x) * 4)
+
+music: dw 0, 0
+ dw TM(0), G2
+ dw TM(40), C3
+ dw TM(70), C3
+
+ dw TM(80), C3
+ dw TM(140), 0
+
+ dw TM(160), G2
+ dw TM(200), D3
+ dw TM(230), B2
+
+ dw TM(240), C3
+ dw TM(300), 0
+
+ dw TM(320), G2
+ dw TM(360), C3
+ dw TM(390), F3
+
+ dw TM(400), F3
+ dw TM(440), E3
+ dw TM(470), D3
+
+ dw TM(480), C3
+ dw TM(520), B2
+ dw TM(550), C3
+
+ dw TM(560), D3
+ dw TM(640), 0
+
+ dw TM(680), 0
dw 0ffffh, 0
times 446-($-$$) db 0
dd 0820280ch
dd 00000800h
dd 0001f800h
+
+w5: dw 5
+w30: dw 30
times 510-($-$$) db 0
dw 0aa55h
projects / bootcard / blobdiff