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> OS Construction > ps2 initialisation w virtualbox |
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N-LG 22 Apr 2020, 17:38
I have problems initializing the PS / 2 mouse when I test my OS with virtualbox while it works very well on a real machine,
I started from this example: https://forum.osdev.org/viewtopic.php?t=24277 but I do not understand why it does not go on virtualbox when it works very well on a real machine here is the initialization code: Code: ;commande au 8042: Enable Auxiliary Interface mov al,0A8h call env_8042_cmd ;commande au 8042: test Auxiliary Interface mov al,0A9h call env_8042_cmd call lec_ps2 cmp al,0 jne fin_init_souris ;si c'est pas bon on initalise pas la souris ;définis les parametres de base mov dx,seldat mov ds,dx mov byte[atts1],1 mov byte[nbts1],3 mov byte[nbzt1],0 ;modifie le 8042 Command Byte mov al,20h call env_8042_cmd call lec_ps2 bts ax,1 ;enable l'interruption auxilliaire btr ax,5 ;met a zéro le bit "disable auxiliary device" mov bl, al mov al,60h call env_8042_cmd mov al,bl call env_8042_dat call lec_ps2 ;commande a la souris: set to default value mov al,0F6h call env_ps2 ;envoie la séquence d'activation de la molette par sequence de commandes set sample rate mov al, 0F3h ;sample rate call env_ps2 mov al, 200 ;a la valeur 200 call env_ps2 mov al, 0F3h ;sample rate call env_ps2 mov al, 100 ;a la valeur 100 call env_ps2 mov al, 0F3h ;sample rate call env_ps2 mov al, 80 ;a la valeur 80 call env_ps2 ;vérifie le type de la souris pour voir si la molette a été activé mov al,0F2h call env_ps2 call lec_ps2 cmp al,3 jne molette_non_active mov byte[nbts1],4 molette_non_active: ;configure la souris et l'active mov al,0F3h ;set sample rate call env_ps2 mov al,200 ;échantillons par seconde, valeur possible: 10,20,40,60,80,100,200 call env_ps2 mov al,0E8h ;set resolution call env_ps2 mov al,3 ;valeur possible: 0,1,2,3 call env_ps2 mov al,0E6h ;set scaling 1:1 call env_ps2 mov al,0F4h ;enable call env_ps2 ;démasque l'irq 12 mov dx,0A1h mov al,0EFh out dx,al az2: in al,64h test al,01h ;0=vide jz az1 in al,60h jmp az2 az1: ;aquitte toutes irq en attente mov al,20h out 0A0h,al mov al,20h out 20h,al jmp fin_init_souris here are the sub functions used: Code: at8042ok_lec: ;attend que la puce ait des données disponible sur 60h push eax push ecx mov ecx,10000 boucle_at8042ok_lec: in al,64h test al,1 jnz at8042ok dec ecx jnz boucle_at8042ok_lec at8042ok: pop ecx pop eax ret at8042ok_env: ;attend la fin du traitement des donnes par la puce 8042 push eax push ecx mov ecx,10000 boucle_at8042ok_env: in al,64h test al,2 jz at8042ok dec ecx jnz boucle_at8042ok_env pop ecx pop eax ret env_ps2: call at8042ok_env push eax mov al,0D4h out 64h,al pop eax call at8042ok_env out 60h,al lec_ps2: call at8042ok_lec in al,60h fin_lec_ps2: ret env_8042_cmd: call at8042ok_env out 64h,al call at8042ok_env ret env_8042_dat: call at8042ok_env out 60h,al ret |
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22 Apr 2020, 17:38 |
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N-LG 24 Apr 2020, 15:55
I redid my program following advices i fond on osdev.org forum and now it works perfectly, i change how to detect the mouse,before I tested with the A9h command to know if a mouse was plugged in but it doesn't seem to work with virtualbox so once the 8042 is configured I send the init sequence of mice with wheel and 5 button and I test the result for to know if there is a mouse and to know what type
here is the result code: Code: ;commande au 8042: disable keyboard Interface mov al,0ADh call env_8042_cmd ;commande au 8042: disable Auxiliary Interface mov al,0A7h call env_8042_cmd call vide_8042 ;modifie le 8042 Command Byte mov al,20h call env_8042_cmd call lec_ps2 bts ax,1 ;enable l'interruption auxilliaire mov bl, al mov al,60h call env_8042_cmd mov al,bl call env_8042_dat call lec_ps2 ;commande au 8042: enable keyboard Interface mov al,0AEh call env_8042_cmd ;commande au 8042: enable Auxiliary Interface mov al,0A8h call env_8042_cmd ;commande a la souris: set to default value mov al,0F6h call env_ps2 ;envoie la séquence d'activation de la molette par sequence de commandes set sample rate mov al, 0F3h ;sample rate call env_ps2 mov al, 200 ;a la valeur 200 call env_ps2 mov al, 0F3h ;sample rate call env_ps2 mov al, 100 ;a la valeur 100 call env_ps2 mov al, 0F3h ;sample rate call env_ps2 mov al, 80 ;a la valeur 80 call env_ps2 ;envoie la séquence d'activation des 4eme et 5eme boutons par sequence de commandes set sample rate mov al, 0F3h call env_ps2 mov al, 200 call env_ps2 mov al, 0F3h call env_ps2 mov al,200 call env_ps2 mov al, 0F3h call env_ps2 mov al,80 call env_ps2 ;vérifie le type de la souris mov dx,seldat mov ds,dx mov al,0F2h call env_ps2 call lec_ps2 cmp al,0 je souris_simple cmp al,3 je souris_molette cmp al,4 je souris_5boutons jmp fin_init_souris souris_simple: mov byte[atts1],1 mov byte[nbts1],3 mov byte[nbzt1],0 jmp suite_init_souris souris_molette: mov byte[atts1],1 mov byte[nbts1],4 mov byte[nbzt1],0 jmp suite_init_souris souris_5boutons: mov byte[atts1],3 mov byte[nbts1],4 mov byte[nbzt1],0 ;jmp suite_init_souris ;configure la souris et l'active suite_init_souris: mov al,0F3h ;set sample rate call env_ps2 mov al,200 ;échantillons par seconde, valeur possible: 10,20,40,60,80,100,200 call env_ps2 mov al,0E8h ;set resolution call env_ps2 mov al,3 ;valeur possible: 0,1,2,3 call env_ps2 mov al,0E6h ;set scaling 1:1 call env_ps2 mov al,0F4h ;enable call env_ps2 ;démasque l'irq 12 mov dx,0A1h mov al,0EFh out dx,al call vide_8042 ;aquitte toutes irq en attente mov al,20h out 0A0h,al mov al,20h out 20h,al fin_init_souris: and the sub fonction: Code: at8042ok_lec: ;attend que la puce ait des données disponible sur 60h push eax push ecx mov ecx,10000 boucle_at8042ok_lec: in al,64h test al,1 jnz at8042ok dec ecx jnz boucle_at8042ok_lec at8042ok: pop ecx pop eax ret at8042ok_env: ;attend la fin du traitement des donnes par la puce 8042 push eax push ecx mov ecx,10000 boucle_at8042ok_env: in al,64h test al,2 jz at8042ok dec ecx jnz boucle_at8042ok_env pop ecx pop eax ret env_ps2: call at8042ok_env push eax mov al,0D4h out 64h,al pop eax call at8042ok_env out 60h,al lec_ps2: call at8042ok_lec in al,60h fin_lec_ps2: ret env_8042_cmd: call at8042ok_env out 64h,al call at8042ok_env ret env_8042_dat: call at8042ok_env out 60h,al ret vide_8042: in al,60h nop in al,64h test al,01h ;0=vide jnz vide_8042 ret |
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24 Apr 2020, 15:55 |
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pfranz 21 Nov 2023, 00:05
N-LG wrote: I redid my program following advices i fond on osdev.org forum and now it works perfectly, i change how to detect the mouse,before I tested with the A9h command to know if a mouse was plugged in but it doesn't seem to work with virtualbox so once the 8042 is configured I send the init sequence of mice with wheel and 5 button and I test the result for to know if there is a mouse and to know what type If I send F2 before initializing the wheel, I correctly get 0. |
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21 Nov 2023, 00:05 |
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N-LG 25 Nov 2023, 21:31
it work fine for me, i test it on virtualbox, qemu and real machine
I had difficulty however, there are too many things to respect in the communication protocol before being able to make these damn mice work maybe I made small modifications: https://github.com/N-LG/SEAC/blob/master/ASM/NOYAU/ETAGE3.ASM#L1154 |
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25 Nov 2023, 21:31 |
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pfranz 26 Nov 2023, 10:39
It seems that after the FA, VirtualBox sends two bytes (another FA, then the code). On OSDev Wiki it says that mouse can return one or two bytes (keyboard always returns two), so it's weird but still correct. They say to read the first byte, then try with the second and check for timeout.
I do it and it works. It is strange that Virtualbox sends 1 byte for code 00 and two bytes for codes 03 and 04. Version is 7.0.12 (latest). |
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26 Nov 2023, 10:39 |
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