2 ; nasm -f bin -o bootcard.img bootcard.asm
3 ; cat bootcard.img >/dev/<usbstick>
13 spkstat equ muscur + 4
22 PIT_CMD_SQWAVE equ 06h
25 %define DIV_ROUND(a, b) ((a) / (b) + ((a) % (b)) / ((b) / 2))
45 mov al, (PIT_CMD_CHAN0 + (%1 << 6)) | PIT_CMD_HILO | PIT_CMD_SQWAVE
48 out PIT_DATA0 + %1, al
50 out PIT_DATA0 + %1, al
60 mov cx, (data_end - data_start) / 2
64 mov word [32], timer_intr
67 settimer 0, DIV_ROUND(OSC_FREQ, 100)
110 .pmus: mov bx, [muscur]
112 mov cx, [music + bx] ; event time
119 mov ax, [music + 2 + bx] ; event counter reload
125 mov word [spkstat], 1
129 mov word [spkstat], 0
132 ; PWM for volume control
159 str1: db 'message message blah',0
160 str2: db 'Michael & Athina',0
169 %define TM(x) (40 + (x) * 2)
204 times 446-($-$$) db 0
209 times 510-($-$$) db 0
212 ; vi:ft=nasm ts=8 sts=8 sw=8: