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Mouse interrupt handler + debug

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This commit is contained in:
Frater 2026-01-29 13:46:35 +01:00
commit 4cf1a0b7a2
6 changed files with 389 additions and 235 deletions
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5
src/bda.asm
View file

@ -58,6 +58,7 @@ struc mouse
.buffer resb 4 ; i8042 input buffer 0..3
.idx resb 1 ; index in the buffer 4
.packetlen resb 1 ; max buffer len (3 ou 4) 5
.blinker resb 1 ;
.status resb 1 ; mouse status (button etc) 6
.wheel resb 1 ; if a packet size is 4; experimental 7
@ -85,11 +86,7 @@ struc gfx
.cur_y resw 1
.cur_offset resw 1 ; offset calculé pour le prochain caractère
.cur_line_ofs resw 1 ; "interligne" +2000h ou -2000h
; .cur_xbyte resb 1 ; x>>3 (0..79)
.cur_shift resb 1 ; x&7 (0..7)
; .cur_parity resb 1
; .cur_color resb 1 ; 0 = texte en noir, autre = texte en blanc
; .cur_trans resb 1 ; 0 = fond transparent, autre = fond inversé .txt_color
.cur_mode resb 1 ;
endstruc

36
src/boot.asm
View file

@ -31,6 +31,13 @@ bits 16
; initial stack
%define STACK_SEG 0x0800 ; segment de base
;section .text
; bits 16
;
; db 'EXTRA CODE Section',0
;
; times 0xFFFF - ($ - $$) db 0xFF
section .text
bits 16
@ -41,7 +48,7 @@ section .text
%include "./bda.asm"
; %include "./services/macros.asm"
%include "./drivers/debug.asm"
%include "./common/debug_cga.asm"
%include "./drivers/gfx_cgam.asm"
%include "./drivers/mouse_ps2.asm"
%include "./drivers/keyboard_ps2.asm"
@ -82,10 +89,6 @@ reset:
; on vérifie que le BIOS VGA a installé une INT 10h
call setup_check_vga
; on initialise le mode texte 80x25 par défaut DEBUG
;mov ax, 0x0003
;int 10h
; enable IRQ 0
mov ah,IRQ_ENABLED
mov al,0
@ -135,7 +138,6 @@ reset:
mov cx,8
mov dx,24
GFX_SET_WRTIE_MODE 0
.loopshift:
@ -147,10 +149,28 @@ reset:
cmp cx,16
jbe .loopshift
endless:
mov ax,BDA_DATA_SEG
mov ds,ax
mov ax,0
endless:
xor cx,cx
mov dx,180
GFX_DRV GFX_GOTOXY
mov ax, [BDA_MOUSE + mouse.x]
call print_word_hex
mov al,' '
call cga_putc
mov ax, [BDA_MOUSE + mouse.y]
call print_word_hex
mov al,' '
call cga_putc
xor ah,ah
mov al, [BDA_MOUSE + mouse.blinker]
call print_word_hex
jmp endless

105
src/common/debug_cga.asm Normal file
View file

@ -0,0 +1,105 @@
; =============================================================================
; Project : Custom BIOS / ROM
; File : cga_debug.asm
; Author : frater
;
; License : GNU General Public License v3.0 or later (GPL-3.0+)
;
; This program is free software: you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation, either version 3 of the License, or
; (at your option) any later version.
;
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this program. If not, see <https://www.gnu.org/licenses/>.
;
; =============================================================================
; =============================================================================
; Fonction : dump_ram_words
; Description : Lit des mots (16 bits) depuis DS:SI et les affiche en Hexa
; Entrées :
; DS:SI = Adresse de départ en RAM
; CX = Nombre de mots (words) à lire et afficher
; =============================================================================
dump_ram_words:
jcxz .done ; Sécurité : si CX=0, on sort
.loop:
lodsw ; Charge [DS:SI] dans AX et incrémente SI de 2
; Note: x86 est Little Endian. Si RAM = 12 34,
; AX vaudra 0x3412.
push cx ; Sauvegarde le compteur de boucle principal
push si ; Sauvegarde le pointeur (si cga_putc le modifie)
call print_word_hex ; Affiche AX sous forme "XXXX"
; (Optionnel) Ajouter un espace entre chaque mot pour la lisibilité
mov al, ' '
call cga_putc
pop si ; Restaure SI
pop cx ; Restaure CX
loop .loop ; Décrémente CX et boucle si != 0
.done:
ret
; =============================================================================
; Fonction : print_word_hex
; Description : Convertit AX en 4 caractères Hexa et les affiche
; Entrée : AX = Valeur 16 bits (ex: 0x1A2B)
; Sortie : Affiche "1A2B" via cga_putc
; =============================================================================
print_word_hex:
push ax ; Sauvegarde AX car on va le modifier (rotation)
push cx
push bx
mov cx, 4 ; 4 caractères hex dans un mot de 16 bits
.next_digit:
; On veut afficher les bits 12-15 d'abord.
; L'astuce est de faire une rotation à gauche de 4 bits.
; Le quartet de poids fort se retrouve en bas (bits 0-3).
rol ax, 4
mov bx, ax ; Copie temporaire
and bl, 0x0F ; On isole les 4 derniers bits (0 à 15)
mov al, bl ; AL contient la valeur numérique (0-15)
call nibble_to_ascii ; Convertit AL en caractère ASCII
call cga_putc ; Affiche le caractère
loop .next_digit ; Répète 4 fois
pop bx
pop cx
pop ax ; Restaure l'état original de AX
ret
; =============================================================================
; Fonction : nibble_to_ascii
; Description : Convertit les 4 bits de poids faible de AL en ASCII Hex
; Entrée : AL (valeur 0-15)
; Sortie : AL (caractère '0'-'9' ou 'A'-'F')
; =============================================================================
nibble_to_ascii:
cmp al, 9
ja .letter ; Si > 9, c'est une lettre (A-F)
add al, '0' ; Sinon c'est un chiffre : 0x0 -> '0'
ret
.letter:
add al, 'A' - 10 ; Convertit 10 -> 'A', 11 -> 'B', etc.
ret

127
src/common/debug_txt.asm Normal file
View file

@ -0,0 +1,127 @@
; =============================================================================
; Project : Custom BIOS / ROM
; File : debug.asm
; Author : frater
; Created : 06 jan 2026
;
; License : GNU General Public License v3.0 or later (GPL-3.0+)
;
; This program is free software: you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation, either version 3 of the License, or
; (at your option) any later version.
;
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this program. If not, see <https://www.gnu.org/licenses/>.
;
; =============================================================================
debug_puts:
.next:
push dx
mov dx, DEBUG_PORT
lodsb ; AL = *SI++
test al, al
jz .done
out dx, al
jmp .next
.done:
pop dx
ret
debug_putc:
push dx
mov dx, DEBUG_PORT
out dx, al
pop dx
ret
; AL = 0..15 -> print hex digit
debug_puthex4:
and al, 0Fh
cmp al, 9
jbe .num
add al, 'A' - 10
jmp .pout
.num:
add al, '0'
.pout:
call debug_putc
ret
; AL = byte -> print 2 hex digits
debug_puthex8:
push ax
mov ah, al
shr al, 4
call debug_puthex4
mov al, ah
call debug_puthex4
pop ax
ret
; AX = word -> print 4 hex digits
debug_puthex16:
push ax
mov al, ah
call debug_puthex8
pop ax
call debug_puthex8
ret
; --- screen text functions ---
; AH = page
; DH = row
; DL = column
scr_gotoxy:
mov ah, 02h
mov bh, 0 ; page 0
int 10h
ret
scr_putc:
mov ah, 0x0E
int 10h
ret
; AL = 0..15 -> print hex digit
scr_puthex4:
and al, 0Fh ; mask 4 bits low
cmp al, 9 ; is it 0..9 ?
jbe .num ; yes
add al, 'A' - 10 ; convert to 'A'..'F'
jmp .pout
.num:
add al, '0' ; convert to '0'..'9'
.pout:
mov ah, 0x0E
int 10h
ret
; AL = byte -> print 2 hex digits
scr_puthex8:
push ax
push bx
mov bl, al ; save al
shr al, 4 ; 4 bits plus significatifs
call scr_puthex4
mov al, bl ; restore al
call scr_puthex4
pop bx
pop ax
ret
; AX = word -> print 4 hex digits
scr_puthex16:
push ax
mov al, ah
call scr_puthex8
pop ax
call scr_puthex8
ret

127
src/drivers/debug.asm
View file

@ -1,127 +0,0 @@
; =============================================================================
; Project : Custom BIOS / ROM
; File : debug.asm
; Author : frater
; Created : 06 jan 2026
;
; License : GNU General Public License v3.0 or later (GPL-3.0+)
;
; This program is free software: you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation, either version 3 of the License, or
; (at your option) any later version.
;
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this program. If not, see <https://www.gnu.org/licenses/>.
;
; =============================================================================
debug_puts:
.next:
push dx
mov dx, DEBUG_PORT
lodsb ; AL = *SI++
test al, al
jz .done
out dx, al
jmp .next
.done:
pop dx
ret
debug_putc:
push dx
mov dx, DEBUG_PORT
out dx, al
pop dx
ret
; AL = 0..15 -> print hex digit
debug_puthex4:
and al, 0Fh
cmp al, 9
jbe .num
add al, 'A' - 10
jmp .pout
.num:
add al, '0'
.pout:
call debug_putc
ret
; AL = byte -> print 2 hex digits
debug_puthex8:
push ax
mov ah, al
shr al, 4
call debug_puthex4
mov al, ah
call debug_puthex4
pop ax
ret
; AX = word -> print 4 hex digits
debug_puthex16:
push ax
mov al, ah
call debug_puthex8
pop ax
call debug_puthex8
ret
; --- screen text functions ---
; AH = page
; DH = row
; DL = column
scr_gotoxy:
mov ah, 02h
mov bh, 0 ; page 0
int 10h
ret
scr_putc:
mov ah, 0x0E
int 10h
ret
; AL = 0..15 -> print hex digit
scr_puthex4:
and al, 0Fh ; mask 4 bits low
cmp al, 9 ; is it 0..9 ?
jbe .num ; yes
add al, 'A' - 10 ; convert to 'A'..'F'
jmp .pout
.num:
add al, '0' ; convert to '0'..'9'
.pout:
mov ah, 0x0E
int 10h
ret
; AL = byte -> print 2 hex digits
scr_puthex8:
push ax
push bx
mov bl, al ; save al
shr al, 4 ; 4 bits plus significatifs
call scr_puthex4
mov al, bl ; restore al
call scr_puthex4
pop bx
pop ax
ret
; AX = word -> print 4 hex digits
scr_puthex16:
push ax
mov al, ah
call scr_puthex8
pop ax
call scr_puthex8
ret

32
src/drivers/mouse_ps2.asm
View file

@ -66,6 +66,9 @@ mouse_reset:
; experiemntal
mov byte [fs:BDA_MOUSE + mouse.wheel],0
; debug
mov byte [fs:BDA_MOUSE + mouse.blinker],0
ret
; ------------------------------------------------------------
@ -85,6 +88,7 @@ mouse_init:
call ps2_wait_ready_write
mov al, I8042_CMD_DIS_MOUSE ; Disable Mouse
out i8042_PS2_CTRL, al
; Vider tout ce qui traîne
call ps2_flush_output
; Activer le port souris (AUX)
@ -283,6 +287,8 @@ isr_mouse_handler:
; lire un octet depuis le contrôleur et le stocker dans le buffer
in al, i8042_PS2_DATA ; lire octet souris
inc byte [BDA_MOUSE + mouse.blinker]
movzx bx, byte [BDA_MOUSE + mouse.idx]
mov byte [BDA_MOUSE + mouse.buffer + bx], al
inc byte [BDA_MOUSE + mouse.idx]
@ -323,6 +329,32 @@ isr_mouse_handler:
.y_pos:
sub [BDA_MOUSE + mouse.y], ax
; --- CLAMPING X ---
; Check minimum (0)
cmp word [fs:BDA_MOUSE + mouse.x], 0
jge .check_x_max
mov word [fs:BDA_MOUSE + mouse.x], 0
jmp .done_x
.check_x_max:
; Check maximum (e.g., 639 for graphics, or pixel width)
cmp word [fs:BDA_MOUSE + mouse.x], GFX_WIDTH-1 ; Replace with variable or define
jle .done_x
mov word [fs:BDA_MOUSE + mouse.x], GFX_WIDTH-1
.done_x:
; --- CLAMPING Y ---
; Check minimum (0)
cmp word [fs:BDA_MOUSE + mouse.y], 0
jge .check_y_max
mov word [fs:BDA_MOUSE + mouse.y], 0
jmp .done_y
.check_y_max:
; Check maximum
cmp word [fs:BDA_MOUSE + mouse.y], GFX_HEIGHT-1 ; Replace with variable or define
jle .done_y
mov word [fs:BDA_MOUSE + mouse.y], GFX_HEIGHT-1
.done_y:
; check si il y a un 4eme byte a traiter
mov al, [BDA_MOUSE + mouse.packetlen]
cmp al,4