nticks equ data_start
tmoffs equ nticks + 4
muscur equ tmoffs + 4
-spkstat equ muscur + 4
-vol equ spkstat + 4
-data_end equ vol + 4
+data_end equ muscur + 4
+
+backbuf_seg equ 1000h
OSC_FREQ equ 1193182
PIT_DATA0 equ 40h
out PIT_DATA0 + %1, al
%endmacro
- xor eax, eax
+start: xor ax, ax
mov ds, ax
mov es, ax
mov ss, ax
mov cx, (data_end - data_start) / 2
rep stosw
- ;mov word [vol], 04h
mov word [32], timer_intr
- mov word [34], 0
+ mov [34], ax
- settimer 0, DIV_ROUND(OSC_FREQ, 100)
+ 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
+
+ mov dx, 3dah
+.invb: in al, dx
+ and al, 8
+ jnz mainloop
+.novb: in al, dx
+ and al, 8
+ jz .novb
+
+ push ds
+ push es
+ push es
+ pop ds
+ push 0a000h
+ pop es
xor di, di
- rep stosw
+ xor si, si
+ mov cx, 32000
+ 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
cmp cx, 0ffffh
jz .loop
cmp ax, cx
- jb .dopwm
+ jb .eoi
- inc dword [muscur]
+ inc word [muscur]
mov ax, [music + 2 + bx] ; event counter reload
test ax, ax
jz .off
mov bx, ax
settimer 2, bx
spkon
- mov word [spkstat], 1
- jmp .dopwm
-
-.off: spkoff
- mov word [spkstat], 0
jmp .eoi
- ; PWM for volume control
-.dopwm: jmp .eoi
- spkoff
- mov ax, [spkstat]
- test ax, ax
- jz .eoi
- mov ax, [nticks]
- and ax, 0fh
- cmp ax, [vol]
- jae .pwmoff
- spkon
- jmp .eoi
-.pwmoff:
- spkoff
+.off: spkoff
.eoi: mov al, 20h
out 20h, al ; EOI
str1: db 'message message blah',0
-str2: db 'Michael & Athina',0
+str2: db 'Michael & Athena',0
-G1 equ 24351
-C2 equ 18243
-D2 equ 16252
-B1 equ 19328
-F2 equ 13666
-E2 equ 14479
+G2 equ 24351/2
+C3 equ 18243/2
+D3 equ 16252/2
+B2 equ 19328/2
+F3 equ 13666/2
+E3 equ 14479/2
-%define TM(x) (40 + (x) * 2)
+%define TM(x) (40 + (x) * 4)
music: dw 0, 0
- dw TM(0), G1
- dw TM(40), C2
- dw TM(70), C2
+ dw TM(0), G2
+ dw TM(40), C3
+ dw TM(70), C3
- dw TM(80), C2
+ dw TM(80), C3
dw TM(140), 0
- dw TM(160), G1
- dw TM(200), D2
- dw TM(230), B1
+ dw TM(160), G2
+ dw TM(200), D3
+ dw TM(230), B2
- dw TM(240), C2
+ dw TM(240), C3
dw TM(300), 0
- dw TM(320), G1
- dw TM(360), C2
- dw TM(390), F2
+ dw TM(320), G2
+ dw TM(360), C3
+ dw TM(390), F3
- dw TM(400), F2
- dw TM(440), E2
- dw TM(470), D2
+ dw TM(400), F3
+ dw TM(440), E3
+ dw TM(470), D3
- dw TM(480), C2
- dw TM(520), B1
- dw TM(550), C2
+ dw TM(480), C3
+ dw TM(520), B2
+ dw TM(550), C3
- dw TM(560), D2
+ dw TM(560), D3
dw TM(640), 0
dw TM(680), 0
dd 0820280ch
dd 00000800h
dd 0001f800h
+
+w5: dw 5
+w30: dw 30
times 510-($-$$) db 0
dw 0aa55h
projects / bootcard / blobdiff