2005-10-06 19:56:22 +02:00
|
|
|
label next_usage_update dword at 0xB008
|
|
|
|
|
label timer_ticks dword at 0xFDF0
|
|
|
|
|
|
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
|
;; IRQ0 HANDLER (TIMER INTERRUPT) ;;
|
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
|
|
|
|
|
|
align 32
|
|
|
|
|
irq0:
|
|
|
|
|
|
|
|
|
|
cmp [error_interrupt],-1
|
|
|
|
|
je no_error_in_previous_process
|
|
|
|
|
|
|
|
|
|
mov edi,[error_interrupt]
|
|
|
|
|
shl edi, 3
|
|
|
|
|
mov [edi+tss0i_l +5], word 01010000b *256 +11101001b
|
|
|
|
|
|
|
|
|
|
mov edi,[error_interrupt]
|
|
|
|
|
shl edi,7
|
|
|
|
|
add edi,0x290000
|
|
|
|
|
mov esi,[error_interrupt_entry]
|
|
|
|
|
mov [edi+l.eip-tss_sceleton],esi
|
|
|
|
|
mov [edi+l.eflags-tss_sceleton],dword 0x11002
|
|
|
|
|
|
|
|
|
|
mov [0xffff],byte 0
|
|
|
|
|
|
|
|
|
|
mov [error_interrupt],-1
|
|
|
|
|
|
|
|
|
|
no_error_in_previous_process:
|
|
|
|
|
|
|
|
|
|
mov edi,[0x3000]
|
|
|
|
|
shl edi, 3
|
|
|
|
|
; fields of TSS descriptor:
|
|
|
|
|
mov [edi+gdts+ tss0 +5], word 01010000b *256 +11101001b
|
|
|
|
|
|
|
|
|
|
inc dword [timer_ticks]
|
|
|
|
|
|
|
|
|
|
mov eax, [timer_ticks]
|
|
|
|
|
;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
|
|
|
|
|
call playNote ; <<<--- INSERT THIS LINE !!!!!!!!!!
|
|
|
|
|
;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
|
|
|
|
|
|
|
|
|
|
cmp eax,[next_usage_update]
|
|
|
|
|
jb .nocounter
|
|
|
|
|
add eax,100
|
|
|
|
|
mov [next_usage_update],eax
|
|
|
|
|
call updatecputimes
|
|
|
|
|
.nocounter:
|
|
|
|
|
|
|
|
|
|
mov edi, [0x3010]
|
|
|
|
|
|
|
|
|
|
mov ebx, [edi+0x18] ; time stamp counter add
|
|
|
|
|
call _rdtsc
|
|
|
|
|
sub eax, ebx
|
|
|
|
|
add eax, [edi+0x14] ; counter sum
|
|
|
|
|
mov [edi+0x14], eax
|
|
|
|
|
|
|
|
|
|
mov ebx,[0x3000]
|
|
|
|
|
|
|
|
|
|
cmp [0xffff], byte 1 ;1
|
|
|
|
|
je do_not_change_task ;je
|
|
|
|
|
|
|
|
|
|
.waiting_for_termination:
|
|
|
|
|
.waiting_for_reuse:
|
|
|
|
|
add edi,0x20
|
|
|
|
|
inc ebx
|
|
|
|
|
|
|
|
|
|
mov al, byte [edi+0xA]
|
|
|
|
|
cmp al, 3
|
|
|
|
|
je .waiting_for_termination
|
|
|
|
|
cmp al, 4
|
|
|
|
|
je .waiting_for_termination
|
|
|
|
|
cmp al, 9
|
|
|
|
|
je .waiting_for_reuse
|
|
|
|
|
|
|
|
|
|
cmp ebx,[0x3004]
|
|
|
|
|
jbe nsched0
|
|
|
|
|
mov ebx,1
|
|
|
|
|
mov edi,0x3020
|
|
|
|
|
|
|
|
|
|
nsched0:
|
|
|
|
|
|
|
|
|
|
mov [0x3000],ebx
|
|
|
|
|
mov [0x3010],edi
|
|
|
|
|
|
|
|
|
|
do_not_change_task:
|
|
|
|
|
|
2005-10-12 13:35:35 +02:00
|
|
|
;mov edx,[0x3000]
|
|
|
|
|
;lea edx,[tss0sys+8*edx]
|
2005-10-06 19:56:22 +02:00
|
|
|
;mov [8*0x40+idts+8+0], word 0
|
2005-10-10 18:57:18 +02:00
|
|
|
;mov [8*0x40+idts+8+2],dx
|
2005-10-06 19:56:22 +02:00
|
|
|
;mov [8*0x40+idts+8+4],word 11100101b*256
|
|
|
|
|
;mov [8*0x40+idts+8+6], word 0
|
|
|
|
|
|
|
|
|
|
call _rdtsc
|
|
|
|
|
mov [edi+0x18],eax
|
|
|
|
|
|
|
|
|
|
cmp [0xffff],byte 0
|
|
|
|
|
je nodecffff
|
|
|
|
|
dec byte [0xffff]
|
|
|
|
|
nodecffff:
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
shl ebx, 3
|
|
|
|
|
xor eax, eax
|
|
|
|
|
add ebx, tss0
|
|
|
|
|
mov word [0xB004], bx ; selector ;mov [tss_s],bx
|
|
|
|
|
mov dword [0xB000], eax ; offset
|
|
|
|
|
|
|
|
|
|
mov al,0x20 ; send End Of Interrupt signal
|
|
|
|
|
mov dx,0x20
|
|
|
|
|
out dx,al
|
|
|
|
|
.switch:
|
|
|
|
|
jmp pword [0xB000]
|
|
|
|
|
inc [context_counter] ;noname & halyavin
|
|
|
|
|
jmp irq0
|
|
|
|
|
|
|
|
|
|
iglobal
|
|
|
|
|
context_counter dd 0 ;noname & halyavin
|
|
|
|
|
endg
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
align 4
|
|
|
|
|
change_task:
|
|
|
|
|
|
|
|
|
|
mov [0xffff],byte 2
|
|
|
|
|
|
|
|
|
|
dec dword [timer_ticks] ; because irq0 will increase it
|
|
|
|
|
|
|
|
|
|
int 0x20 ; irq0 handler
|
|
|
|
|
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
align 4
|
|
|
|
|
updatecputimes:
|
|
|
|
|
|
|
|
|
|
mov eax,[idleuse]
|
|
|
|
|
mov [idleusesec],eax
|
|
|
|
|
mov [idleuse],dword 0
|
|
|
|
|
mov ecx, [0x3004]
|
|
|
|
|
mov edi, 0x3020
|
|
|
|
|
.newupdate:
|
|
|
|
|
mov ebx,[edi+0x14]
|
|
|
|
|
mov [edi+0x1c],ebx
|
|
|
|
|
mov [edi+0x14],dword 0
|
|
|
|
|
add edi,0x20
|
|
|
|
|
dec ecx
|
|
|
|
|
jnz .newupdate
|
|
|
|
|
|
|
|
|
|
ret
|
