add mouse support (WIP)
This commit is contained in:
Frater
parent
892da28db7
commit
91881695fb
10 changed files with 719 additions and 161 deletions
3
.gitignore
vendored
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3
.gitignore
vendored
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@ -0,0 +1,3 @@
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build/
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.vscode
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.vscode/tasks.json
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11
build-elf.bat
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11
build-elf.bat
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@ -0,0 +1,11 @@
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@echo off
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if not exist build mkdir build
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cd src
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echo compiling
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"C:\Program Files\NASM\nasm.exe" -f elf32 -g -F dwarf boot.asm -o ..\build\bios.o
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echo LD
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ld -m elf_i386 -T link.ld -o build\bios.elf build\bios.o
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echo ObjectCopy
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objcopy -O binary build\bios.elf build\bios.bin
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cd ..
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BIN
roms/qemu-vgabios.bin
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BIN
roms/qemu-vgabios.bin
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Binary file not shown.
BIN
roms/vgabios.bin
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BIN
roms/vgabios.bin
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Binary file not shown.
39
src/bda.asm
39
src/bda.asm
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@ -2,7 +2,6 @@
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; Project : Custom BIOS / ROM
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; File : bda.asm
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; Author : frater
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; Created : 06 jan 2026
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;
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; License : GNU General Public License v3.0 or later (GPL-3.0+)
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;
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@ -21,32 +20,31 @@
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;
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; =============================================================================
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;
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; compatible with IBM PC BIOS Data Area (BDA):
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; https://wiki.nox-rhea.org/back2root/ibm-pc-ms-dos/hardware/informations/bios_data_area
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;
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%define BDA_SEGMENT 0x0040 ; segment BDA
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; custom var
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; custom vars
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%define BDA_INFO_MEM_SIZE 0x0014 ; Memory size in Kbytes
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%define BDA_INFO_MEM_SEG BDA_INFO_MEM_SIZE+2 ; highest Memory Segment
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; video related information (compatible with VGA bios)
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%define BDA_VIDEO_CURR_MODE 0x0049
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%define BDA_VIDEO_COLUMNS 0x004A
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%define BDA_VIDEO_COLUMNS 0x004A
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%define BDA_VIDEO_BUF_SIZE 0x004C
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%define BDA_VIDEO_OFS_PAGE 0x004E
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; 40:50 8 words Cursor position of pages 1-8, high order byte=row low order byte=column; changing this data isn't reflected immediately on the display
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; 40:60 byte Cursor ending (bottom) scan line (don't modify)
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; 40:61 byte Cursor starting (top) scan line (don't modify)
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; 40:62 byte Active display page number
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; 40:63 word Base port address for active 6845 CRT controller 3B4h = mono, 3D4h = color
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; 40:65 byte 6845 CRT mode control register value (port 3x8h) ; EGA/VGA values emulate those of the MDA/CGA
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; 40:66 byte CGA current color palette mask setting (port 3d9h) ; EGA and VGA values emulate the CGA
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; 40:50 8 words Cursor position of pages 1-8, high order byte=row low order byte=column;
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; changing this data isn't reflected immediately on the display
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; 40:60 byte Cursor ending (bottom) scan line (don't modify)
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; 40:61 byte Cursor starting (top) scan line (don't modify)
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; 40:62 byte Active display page number
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; 40:63 word Base port address for active 6845 CRT controller 3B4h = mono, 3D4h = color
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; 40:65 byte 6845 CRT mode control register value (port 3x8h) ; EGA/VGA values emulate those of the MDA/CGA
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; 40:66 byte CGA current color palette mask setting (port 3d9h) ; EGA and VGA values emulate the CGA
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;
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; information relative à la souris
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@ -57,7 +55,18 @@
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%define BDA_MOUSE_BUFFER 0x0000 ; dword; buffer (jusqu'à 4 octets)
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%define BDA_MOUSE_IDX 0x0004 ; byte 0..3
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%define DBA_MOUSE_PACKETLEN 0x0005
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; 0x0006
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%define DBA_CURSOR_MASK 0x0006 ; byte pixels mask (bit per pixel)
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%define BDA_MOUSE_STATUS 0x0007 ; byte
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%define BDA_MOUSE_X 0x0008 ; word
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%define BDA_MOUSE_Y 0x000A ; word
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%define BDA_MOUSE_Y 0x000A ; word
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%define BDA_MOUSE_WHEEL 0x000C ; word
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%define BDA_CURSOR_VISIBLE 0x000E ; byte (0/1)
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%define BDA_CURSOR_OLDX 0x000F ; word
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%define BDA_CURSOR_OLDY 0x0011 ; word
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%define BDA_CURSOR_NEWX 0x0013 ; word
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%define BDA_CURSOR_NEWY 0x0015 ; word
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%define BDA_CURSOR_BITOFF 0x0017 ; byte 0..7 bits d'offset (x&7)
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%define BDA_CURSOR_BYTES 0x0019 ; byte 2 ou 3 bytes as source for cursor image
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%define BDA_CURSOR_SAVED 0x001A ; flag if image saved
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%define BDA_CURSOR_BG 0x001B ; 48 bytes max (3*16)
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43
src/boot.asm
43
src/boot.asm
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@ -2,7 +2,6 @@
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; Project : Custom BIOS / ROM
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; File : boot.asm
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; Author : frater
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; Created : 06 jan 2026
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;
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; License : GNU General Public License v3.0 or later (GPL-3.0+)
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;
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@ -32,7 +31,7 @@ org 0
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%define DEBUG_PORT 0xe9 ; 0x402 ou 0xe9
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; initial stack
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; initial stack
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%define STACK_SEG 0x0030 ; compatible avec le BMM (Bios Memory Maps)
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%define STACK_TOP 0x0100 ; choix commun en RAM basse (pile descendante)
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@ -45,12 +44,14 @@ org 0
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jmp reset ; ce jump n'est pas sensé être executer, il est présent uniquement pour le debug
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; definition du BDA
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%include ".\bda.asm"
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%include "./bda.asm"
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%include ".\drivers\debug.asm"
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%include ".\drivers\gfx_cgam.asm"
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%include ".\drivers\mouse_ps2.asm"
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%include ".\services\generic.asm"
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%include "./services/macros.asm"
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%include "./drivers/debug.asm"
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%include "./drivers/gfx_cgam.asm"
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%include "./drivers/mouse_ps2.asm"
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%include "./services/generic.asm"
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err_vganok db 'VGA Not Initialized',0
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err_end db 'code completed successfully',0
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@ -61,27 +62,29 @@ reset:
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mov ax, STACK_SEG
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mov ss, ax
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mov sp, STACK_TOP ; haut du segment, mot-aligné
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; detection de la mémoire totale
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call setup_ram
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call ram_setup
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; modification du stack en "haut" de la RAM
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mov ax, dx
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sub ax, 0x0400 ; réserver les 16 dernier KB
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sub ax, 0x0400 ; réserver les 16 dernier KB
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mov ss, ax
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mov sp, 0x1000 ; sommet de pile
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; installé une table d'interruption "dummy"
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call setup_ivt
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call ivt_setup
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sti
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; load other Rom
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call setup_load_rom
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; on vérifie que le BIOS VGA a installer l'INT 10h
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call setup_check_vga
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; on active le mode graphique
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call gfx_init
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; test a line
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mov cx,50
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.bcl: ; mov dx,cx
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mov bl,0
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@ -91,16 +94,16 @@ reset:
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inc cx
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cmp cx,150
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jle .bcl
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call mouse_init
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mov ax,cs
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mov ds,ax
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mov si, err_end
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call debug_puts
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endless: hlt
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endless: nop
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jmp endless
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; ------------------------------------------------------------------
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@ -113,6 +116,6 @@ times 0xFFF0 - ($ - $$) db 0xFF
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; ------------------------------------------------------------------
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reset_vector:
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jmp far 0xF000:reset
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; filling
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; filling
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builddate db '06/01/2026',0
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@ -2,7 +2,6 @@
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; Project : Custom BIOS / ROM
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; File : gfx_cgam.asm
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; Author : frater
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; Created : 06 jan 2026
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;
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; License : GNU General Public License v3.0 or later (GPL-3.0+)
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;
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@ -32,11 +31,10 @@
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%define CGA_STRIDE 80
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%define CGA_ODD_BANK 0x2000
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%define BG16_SIZE 48
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; ------------------------------------------------------------
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; initialise le mode graphique (via l'int 10h)
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;
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;
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; ce mode est entrelacé, un bit/pixel, 8 pixels par octet
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; ------------------------------------------------------------
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gfx_init:
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@ -45,59 +43,65 @@ gfx_init:
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mov al, GFX_MODE
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int 0x10
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mov [BDA_CURSOR_SAVED],0 ; flag image saved
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; dessine un background "check-board"
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call gfx_background
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ret
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; ------------------------------------------------------------
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; Calcule DI + AH=mask pour (CX=x, DX=y) en mode CGA 640x200
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;
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; Out: ES=VIDEO_SEG, DI=offset, AH=bitmask (0x80 >> (x&7))
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; ------------------------------------------------------------
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gfx_calc_addr:
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; calcul de l'offset 'y':
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; si y est impaire, DI+=0x2000
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; DI = (y>>1)*80 + (x>>3) + (y&1)*0x2000
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mov ax, dx
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shr ax, 1 ; ax = y/2
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mov di, ax
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shl di, 4 ; (y/2)*16
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shl ax, 6 ; (y/2)*64
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add di, ax ; *80
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mov ax, cx
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shr ax, 3
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add di, ax
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test dl, 1
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jz .even
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add di, CGA_ODD_BANK
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.even:
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; masque bit = 0x80 >> (x&7)
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push cx
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and cl, 7
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mov ah, 080h
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shr ah, cl
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pop cx
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ret
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; ------------------------------------------------------------
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; Dessine un pixel, accès VRAM direct.
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;
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; In:
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; CX = x (0..639)
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; DX = y (0..199)
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; BL = color (0=black, !=0=white)
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;
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; ------------------------------------------------------------
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gfx_putpixel:
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push ax
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PUSH_ABCD
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push di
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push es
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mov ax, VIDEO_SEG
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mov es,ax
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; calcul de l'offset 'y':
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; si y est impaire, DI+=0x2000
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; DI = (y>>1)*80 + (x>>3) + (y&1)*0x2000
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mov ax, dx
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shr ax, 1 ; ax = y/2
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mov di, ax ; di = y/2
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shl di, 4 ; di = (y/2)*16
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shl ax, 6 ; ax = (y/2)*64
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add di, ax ; di = (y/2)*(16+64) = *80
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mov ax, cx ; x
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shr ax, 3 ; AX = x/8
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add di, ax
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; ligne paire/impaire
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test dl, 1
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jz .ligne_paire
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add di, CGA_ODD_BANK
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.ligne_paire:
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; masque bit = 0x80 >> (x&7)
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and cl, 7 ; cl = x&7
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mov ah, 080h
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shr ah, cl ; AH = bitmask
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call gfx_calc_addr
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; write
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cmp bl, 0
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je .clear
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.set:
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or byte [es:di], ah
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jmp .done
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@ -109,6 +113,25 @@ gfx_putpixel:
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.done:
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pop es
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pop di
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POP_ABCD
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ret
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; ------------------------------------------------------------
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; Lit un pixel (CX=x, DX=y)
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; Out: AL=0/1
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; ------------------------------------------------------------
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gfx_getpixel:
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push ax
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push di
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push es
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call gfx_calc_addr
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mov al, [es:di]
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and al, ah
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setnz al
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pop es
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pop di
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pop ax
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ret
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@ -127,3 +150,403 @@ gfx_background:
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mov cx,0x1000 ; 640/8/2
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rep stosw
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ret
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; ------------------------------------------------------------
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; Calcule les infos de l'alignement du curseur, basé sur cx=X
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; il est important que DS pointe sur le BDA_MOUSE_SEG
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; Out: BDA_CURSOR_BITOFF, BDA_CURSOR_BYTES
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; ------------------------------------------------------------
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gfx_cursor_calc_align:
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mov al, cl
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and al, 7 ; offset = x&7
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mov [BDA_CURSOR_BITOFF], al
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cmp al, 0
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jne .unaligned
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mov byte [BDA_CURSOR_BYTES], 2
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ret
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.unaligned:
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mov byte [BDA_CURSOR_BYTES], 3
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ret
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; ------------------------------------------------------------
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; Sauvegarde le background (24x16) sous le curseur (cx=X,dx=Y)
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;
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; utilise les variables du BDA pour stocker
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; ------------------------------------------------------------
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gfx_cursor_savebg:
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pusha ; sauvegarde registres
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mov ax, BDA_MOUSE_SEG
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mov ds, ax
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mov ax, VIDEO_SEG
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mov es, ax
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cmp [BDA_CURSOR_SAVED], 0
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jne .done ; déjà sauvé
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mov [BDA_CURSOR_SAVED], 1 ; flag image saved
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mov [BDA_CURSOR_NEWX], cx ; sauvegarde la nouvelle position
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mov [BDA_CURSOR_NEWY], dx
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call gfx_calc_addr ; ES:DI = byteaddr pour (X,Y)
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mov dx,0x2000 ; offset pour lignes impaire
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cmp di,dx
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jl .no_odd_bank
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neg dx ; Y est déja une ligne impaire, on retire l'offset
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.no_odd_bank:
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mov si, BDA_CURSOR_BG ; DS:SI = buffer de sauvegarde
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mov bx, 8
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and cx,0x0007 ; alignement X
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jnz .row3
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.row3: ; sauve 3 bytes/ligne
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mov [BDA_CURSOR_BYTES], 3 ; 3 bytes/ligne
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; ligne 'y', peut etre paire ou impaire
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mov ax, word [es:di] ; charge first word
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mov word [ds:si], ax ; sauvegarde
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mov al, byte [es:di+2] ; charge 3ème byte
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mov byte [ds:si+2], al
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add si, 3
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; ligne 'y'+1; si paire +0x2000, si impaire -0x2000
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add di, dx ; charge first word other bank (+0x2000 ou -0x2000)
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mov ax, word [es:di]
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mov word [ds:si], ax
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mov al, byte [es:di+2]
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mov byte [ds:si+2], al
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add si, 3
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sub di, dx
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add di, CGA_STRIDE
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dec bx
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jnz .row3
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jmp .done
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.row2: ; sauve 2 bytes/ligne
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mov [BDA_CURSOR_BYTES], 2 ; par défaut
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; ligne 'y', peut etre paire ou impaire
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mov ax, word [es:di] ; charge first word
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mov word [ds:si], ax ; sauvegarde
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add si, 2
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; ligne 'y'+1; si paire +0x2000, si impaire -0x2000
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add di, dx ; charge first word other bank (+0x2000 ou -0x2000)
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mov ax, word [es:di]
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mov word [ds:si], ax
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add si, 2
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sub di, dx
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add di, CGA_STRIDE
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dec bx
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jnz .row3
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.done:
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popa
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ret
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; ------------------------------------------------------------
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; restore le background (24x16)
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;
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; utilise les variables du BDA pour stocker
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; ------------------------------------------------------------
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gfx_cursor_restorebg:
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pusha ; sauvegarde registres
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mov ax, BDA_MOUSE_SEG
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mov ds, ax
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mov ax, VIDEO_SEG
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mov es, ax
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cmp [BDA_CURSOR_SAVED], 0 ; pas de background sauvé
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je .done
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mov cx,[BDA_CURSOR_OLDX] ; restore de la position
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mov dx,[BDA_CURSOR_OLDY]
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mov [BDA_CURSOR_SAVED], 0 ; le background a été restauré
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call gfx_calc_addr ; ES:DI = byteaddr pour (X,Y)
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mov dx,0x2000 ; offset pour lignes impaire
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cmp di,dx
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jl .no_odd_bank
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neg dx ; Y est déja une ligne impaire, on retire l'offset
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.no_odd_bank:
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mov si, BDA_CURSOR_BG ; DS:SI = buffer de sauvegarde
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mov bx, 8
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cmp [BDA_CURSOR_BYTES], 2 ; si la sauvegarde est en 2 bytes/ligne
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je .row2
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|
||||
.row3: ; restore en 3 bytes/ligne
|
||||
; ligne 'y', peut etre paire ou impaire
|
||||
mov ax,word [ds:si] ; recupère le 1er word
|
||||
mov word [es:di],ax
|
||||
mov al,byte [ds:si+2] ; charge 3ème byte
|
||||
mov byte [es:di+2],al
|
||||
add si, 3
|
||||
|
||||
; ligne 'y'+1; si paire +0x2000, si impaire -0x2000
|
||||
add di, dx ; charge first word other bank (+0x2000 ou -0x2000)
|
||||
mov ax,word [ds:si] ; recupère le 1er word
|
||||
mov word [es:di],ax
|
||||
mov al,byte [ds:si+2] ; charge 3ème byte
|
||||
mov byte [es:di+2],al
|
||||
add si, 3
|
||||
sub di, dx
|
||||
add di, CGA_STRIDE
|
||||
dec bx
|
||||
jnz .row3
|
||||
jmp .done
|
||||
|
||||
.row2: ; restore en 2 bytes/ligne
|
||||
; ligne 'y', peut etre paire ou impaire
|
||||
mov ax,word [ds:si] ; recupère le 1er word
|
||||
mov word [es:di],ax
|
||||
add si, 2
|
||||
|
||||
; ligne 'y'+1; si paire +0x2000, si impaire -0x2000
|
||||
add di, dx ; charge first word other bank (+0x2000 ou -0x2000)
|
||||
mov ax,word [ds:si] ; recupère le 1er word
|
||||
mov word [es:di],ax
|
||||
add si, 2
|
||||
sub di, dx
|
||||
add di, CGA_STRIDE
|
||||
dec bx
|
||||
jnz .row2
|
||||
.done:
|
||||
popa
|
||||
ret
|
||||
|
||||
; ------------------------------------------------------------
|
||||
; Dessine un pixel, en [ES:DI] accès VRAM direct.
|
||||
;
|
||||
; CX = x (0..639)
|
||||
; DX = y (0..199)
|
||||
; BL = color (0=black, !=0=white)
|
||||
; ------------------------------------------------------------
|
||||
gfx_putpixel_fast:
|
||||
cmp bl, 0
|
||||
je .clear
|
||||
.set:
|
||||
or byte [es:di], ah
|
||||
jmp .done
|
||||
.clear:
|
||||
not ah
|
||||
and byte [es:di], ah
|
||||
.done:
|
||||
ret
|
||||
|
||||
; ------------------------------------------------------------
|
||||
; Lit un pixel, en [ES:DI] accès VRAM direct.
|
||||
;
|
||||
; ------------------------------------------------------------
|
||||
gfx_getpixel_fast:
|
||||
mov al, [es:di]
|
||||
and al, ah
|
||||
setnz al
|
||||
ret
|
||||
|
||||
; ------------------------------------------------------------
|
||||
; Dessine le curseur 16x16 AND/XOR à [BDA_CURSOR_NEWX],[BDA_CURSOR_NEWY]
|
||||
;
|
||||
; CS:SI = base du sprite (AND[16] suivi de XOR[16] à +32 bytes)
|
||||
; Uses: BDA_CURSOR_BITOFF/BDA_CURSOR_BYTES (via gfx_cursor_calc_align)
|
||||
; ------------------------------------------------------------
|
||||
gfx_cursor_draw:
|
||||
pusha
|
||||
|
||||
mov ax, BDA_MOUSE_SEG
|
||||
mov ds, ax
|
||||
mov ax, VIDEO_SEG
|
||||
mov es, ax
|
||||
|
||||
mov cx, [BDA_CURSOR_NEWX]
|
||||
mov dx, [BDA_CURSOR_NEWY]
|
||||
|
||||
; calcule offset et bytes/ligne (2 ou 3)
|
||||
call gfx_cursor_calc_align
|
||||
mov bl, [BDA_CURSOR_BITOFF] ; 0..7
|
||||
|
||||
; calcule DI de départ (attention: gfx_calc_addr modifie CL)
|
||||
push cx
|
||||
call gfx_calc_addr ; DI ok, AH ignoré
|
||||
pop cx
|
||||
|
||||
; dxbank = +0x2000 si DI < 0x2000, sinon dxbank = -0x2000
|
||||
mov bp, 02000h
|
||||
cmp di, bp
|
||||
jl .bank_ok
|
||||
neg bp ; bp = -0x2000
|
||||
.bank_ok:
|
||||
|
||||
; on va dessiner 16 lignes: 8 paires (ligne dans bank courant + ligne dans autre bank)
|
||||
mov bx, 0 ; row index (0..15)
|
||||
|
||||
mov dh, 8
|
||||
.pair:
|
||||
; ----- ligne row (bank courant) -----
|
||||
push di
|
||||
push si
|
||||
call .draw_line ; utilise DI, row=BX
|
||||
pop si
|
||||
pop di
|
||||
|
||||
; ----- ligne row+1 (autre bank) -----
|
||||
add di, bp
|
||||
inc bx
|
||||
push di
|
||||
push si
|
||||
call .draw_line
|
||||
pop si
|
||||
pop di
|
||||
sub di, bp
|
||||
|
||||
; avancer de 2 lignes (dans le bank courant): +80 bytes
|
||||
add di, CGA_STRIDE
|
||||
|
||||
inc bx
|
||||
dec dh
|
||||
jnz .pair
|
||||
|
||||
popa
|
||||
ret
|
||||
|
||||
; ------------------------------------------------------------
|
||||
; .draw_line: applique AND/XOR sur une ligne de 16 pixels à ES:DI
|
||||
; row index dans BX (0..15)
|
||||
; offset dans BL (0..7)
|
||||
; sprite base CS:SI
|
||||
; ------------------------------------------------------------
|
||||
.draw_line:
|
||||
push ax
|
||||
push cx
|
||||
push dx
|
||||
push bp
|
||||
push di
|
||||
|
||||
; charger masks de la ligne: AND = [SI + row*2], XOR = [SI + 32 + row*2]
|
||||
mov ax, bx
|
||||
shl ax, 1 ; row*2
|
||||
|
||||
push si
|
||||
add si, ax
|
||||
mov cx, [cs:si] ; AND mask
|
||||
add si, 32
|
||||
mov dx, [cs:si] ; XOR mask
|
||||
pop si
|
||||
|
||||
; lire bytes source
|
||||
mov al, [es:di] ; b0
|
||||
inc di
|
||||
mov ah, [es:di] ; b1
|
||||
dec di
|
||||
; w0 = (b0<<8)|b1 dans AX déjà
|
||||
|
||||
cmp bl, 0
|
||||
je .aligned
|
||||
|
||||
; unaligned: besoin b2 et w1 = (b1<<8)|b2
|
||||
add di, 2
|
||||
mov dl, [es:di] ; b2
|
||||
sub di, 2
|
||||
mov dh, ah ; b1
|
||||
; DX = w1 (b1<<8)|b2
|
||||
|
||||
; seg = (w0<<off) | (w1>>(8-off))
|
||||
; off = BL, rshift = (8-BL)
|
||||
push bx ; sauvegarde row/off
|
||||
mov cl, bl
|
||||
shl ax, cl ; AX = w0<<off
|
||||
|
||||
mov cl, 8
|
||||
sub cl, bl ; cl = 8-off
|
||||
shr dx, cl ; DX = w1>>(8-off)
|
||||
|
||||
or ax, dx ; AX = seg (16 bits alignés)
|
||||
pop bx
|
||||
|
||||
jmp .apply_masks
|
||||
|
||||
.aligned:
|
||||
; seg = w0 déjà dans AX
|
||||
.apply_masks:
|
||||
; newseg = (seg & AND) ^ XOR
|
||||
and ax, cx
|
||||
xor ax, dx ; AX = newseg
|
||||
|
||||
cmp bl, 0
|
||||
je .write_aligned
|
||||
|
||||
; --- write unaligned: impact sur b0 (bas 8-off bits), b1 (tout), b2 (haut off bits) ---
|
||||
; n = 8-off
|
||||
mov cl, 8
|
||||
sub cl, bl ; cl = n (1..7)
|
||||
|
||||
; val0 = newseg >> (8+off)
|
||||
; (8+off) = 8 + BL
|
||||
mov dx, ax
|
||||
mov cl, bl
|
||||
add cl, 8
|
||||
shr dx, cl ; DL = val0 (0..(2^(8-off)-1))
|
||||
|
||||
; mask0 = (1<<n)-1
|
||||
mov cl, 8
|
||||
sub cl, bl ; cl = n
|
||||
mov al, 1
|
||||
shl al, cl
|
||||
dec al ; AL = mask0
|
||||
; b0 = (b0 & ~mask0) | val0
|
||||
mov ah, [es:di] ; reload b0
|
||||
not al
|
||||
and ah, al
|
||||
not al ; AL back to mask0
|
||||
or ah, dl
|
||||
mov [es:di], ah
|
||||
|
||||
; b1 = (newseg >> off) & 0xFF
|
||||
mov dx, ax
|
||||
mov cl, bl
|
||||
shr dx, cl
|
||||
inc di
|
||||
mov [es:di], dl
|
||||
dec di
|
||||
|
||||
; b2 high off bits = (newseg & ((1<<off)-1)) << (8-off)
|
||||
; lowbits = newseg & ((1<<off)-1)
|
||||
mov dx, ax
|
||||
mov cl, bl
|
||||
mov al, 1
|
||||
shl al, cl
|
||||
dec al ; AL=(1<<off)-1
|
||||
and dl, al ; DL = lowbits
|
||||
mov cl, 8
|
||||
sub cl, bl ; cl = 8-off
|
||||
shl dl, cl ; DL = bits pour b2 (dans le haut)
|
||||
|
||||
; mask2 = 0xFF << (8-off)
|
||||
mov al, 0FFh
|
||||
shl al, cl ; AL = mask2
|
||||
add di, 2
|
||||
mov ah, [es:di] ; b2 original
|
||||
not al
|
||||
and ah, al ; clear affected high bits
|
||||
not al
|
||||
or ah, dl
|
||||
mov [es:di], ah
|
||||
sub di, 2
|
||||
|
||||
jmp .done
|
||||
|
||||
.write_aligned:
|
||||
; écrire 2 bytes seulement
|
||||
mov [es:di], ah ; high
|
||||
inc di
|
||||
mov [es:di], al ; low
|
||||
.done:
|
||||
pop di
|
||||
pop bp
|
||||
pop dx
|
||||
pop cx
|
||||
pop ax
|
||||
ret
|
||||
|
|
|
|||
|
|
@ -21,15 +21,13 @@
|
|||
;
|
||||
; =============================================================================
|
||||
|
||||
|
||||
;
|
||||
; controleur de souris via le i8042 (PC Classique)
|
||||
;
|
||||
%define BDA_SEGMENT 0x0040
|
||||
|
||||
%define PS2_PORT_BUFFER 0x60
|
||||
%define PS2_PORT_CTRL 0x64
|
||||
|
||||
; commandes
|
||||
%define MOUSE_CMD_RESET 0xFF
|
||||
%define MOUSE_CMD_DEFAULT 0xF6
|
||||
%define MOUSE_EN_STREAM 0xF4
|
||||
|
|
@ -44,6 +42,9 @@
|
|||
%define I8042_CMD_WR_CBYTE 0x60
|
||||
%define I8042_CMD_WRITE_AUX 0xD4
|
||||
|
||||
%define CURSOR_W 16
|
||||
%define CURSOR_H 16
|
||||
|
||||
mouse_arrow:
|
||||
dw 1001111111111111b ; 0x9FFF
|
||||
dw 1000111111111111b ; 0x8FFF
|
||||
|
|
@ -79,32 +80,53 @@ mouse_arrow:
|
|||
dw 0000000000000000b ; 0x0000
|
||||
|
||||
; ------------------------------------------------------------
|
||||
; initialise le i8042 keyboard and mouse (PS/2)
|
||||
; remise a zero des valeurs internes du "drivers"
|
||||
;
|
||||
; ------------------------------------------------------------
|
||||
mouse_init:
|
||||
; Activer le port souris
|
||||
mov ax, BDA_SEGMENT
|
||||
mouse_reset:
|
||||
mov ax, BDA_MOUSE_SEG
|
||||
mov ds,ax
|
||||
|
||||
|
||||
; effacer les variables du drivers
|
||||
mov [BDA_MOUSE_IDX],0
|
||||
mov dword [BDA_MOUSE_BUFFER],0
|
||||
mov byte [DBA_MOUSE_PACKETLEN],3
|
||||
|
||||
|
||||
mov byte [BDA_MOUSE_STATUS],0
|
||||
mov word [BDA_MOUSE_X],0 ; vous pouvez aussi préciser le centre
|
||||
mov word [BDA_MOUSE_Y],0 ; vous pouvez aussi préciser le centre
|
||||
|
||||
; experiemntal
|
||||
mov word [BDA_MOUSE_WHEEL],0
|
||||
ret
|
||||
|
||||
|
||||
; ------------------------------------------------------------
|
||||
; initialise le i8042 keyboard and mouse (PS/2)
|
||||
;
|
||||
; on envoit les commandes RESET/DEFAULT/STREAM
|
||||
; ------------------------------------------------------------
|
||||
mouse_init:
|
||||
push ds
|
||||
push ax
|
||||
|
||||
; reset des valeurs internes
|
||||
call mouse_reset
|
||||
|
||||
; Activer le port souris
|
||||
call ps2_flush_output
|
||||
|
||||
; Activer le port souris (AUX)
|
||||
call ps2_wait_ready_write
|
||||
mov al, I8042_CMD_EN_AUX
|
||||
out PS2_PORT_CTRL, al
|
||||
|
||||
|
||||
; Lire command byte
|
||||
call ps2_wait_ready_write
|
||||
mov al, I8042_CMD_RD_CBYTE
|
||||
out PS2_PORT_CTRL, al
|
||||
call ps2_read ; AL = command byte
|
||||
|
||||
|
||||
; Activer IRQ12 (bit 1)
|
||||
or al, 02h
|
||||
mov ah, al
|
||||
|
|
@ -119,66 +141,82 @@ mouse_init:
|
|||
|
||||
call ps2_flush_output
|
||||
|
||||
; --- RESET souris: FA, AA, ID
|
||||
; --- Reset
|
||||
; réponse attendue : 0xAA, [ID]
|
||||
mov bl, MOUSE_CMD_RESET
|
||||
call mouse_sendcmd
|
||||
call ps2_read ; 0xAA attendu (self-test OK)
|
||||
call ps2_read ; ID (souvent 0x00)
|
||||
|
||||
; Defaults: FA
|
||||
; --- Default
|
||||
mov bl, MOUSE_CMD_DEFAULT
|
||||
call mouse_sendcmd
|
||||
|
||||
; Enable streaming: FA
|
||||
; --- streaming
|
||||
mov bl, MOUSE_EN_STREAM
|
||||
call mouse_sendcmd
|
||||
|
||||
; (option) détecter 3/4 bytes via F3 200/100/80 + F2
|
||||
; call mouse_detect_packet_len
|
||||
; détecter le packet size (3/4 bytes)
|
||||
call mouse_detect_packet_len
|
||||
|
||||
; installer ISR IRQ12 (INT 74h)
|
||||
; call mouse_install_isr
|
||||
cli
|
||||
|
||||
|
||||
|
||||
; installer le handler
|
||||
mov si, 0x74 * 4
|
||||
xor ax, ax
|
||||
mov ds, ax
|
||||
|
||||
mov word [ds:si], mouse_handler
|
||||
add si, 2
|
||||
mov word [ds:si], BDA_SEGMENT
|
||||
|
||||
sti
|
||||
|
||||
pop ax
|
||||
pop ds
|
||||
ret
|
||||
|
||||
|
||||
; ------------------------------------------------------------
|
||||
; detect la taille du "payload" de la souris.
|
||||
;
|
||||
; On envois les commandes 200/100/
|
||||
;
|
||||
; ------------------------------------------------------------
|
||||
mouse_detect_packet_len:
|
||||
mov byte [DBA_MOUSE_PACKETLEN], 3
|
||||
mov byte [DBA_MOUSE_PACKETLEN], 3
|
||||
|
||||
; F3 200
|
||||
mov bl, MOUSE_SET_RATE
|
||||
call mouse_sendcmd
|
||||
mov bl, 200
|
||||
call mouse_sendcmd
|
||||
; SET_RATE + 200
|
||||
mov bl, MOUSE_SET_RATE
|
||||
call mouse_sendcmd
|
||||
mov bl, 200
|
||||
call mouse_sendcmd
|
||||
|
||||
; F3 100
|
||||
mov bl, MOUSE_SET_RATE
|
||||
call mouse_sendcmd
|
||||
mov bl, 100
|
||||
call mouse_sendcmd
|
||||
; SET_RATE + 100
|
||||
mov bl, MOUSE_SET_RATE
|
||||
call mouse_sendcmd
|
||||
mov bl, 100
|
||||
call mouse_sendcmd
|
||||
|
||||
; F3 80
|
||||
mov bl, MOUSE_SET_RATE
|
||||
call mouse_sendcmd
|
||||
mov bl, 80
|
||||
call mouse_sendcmd
|
||||
; SET_RATE + 80
|
||||
mov bl, MOUSE_SET_RATE
|
||||
call mouse_sendcmd
|
||||
mov bl, 80
|
||||
call mouse_sendcmd
|
||||
|
||||
; F2 -> ID
|
||||
mov bl, MOUSE_GET_ID
|
||||
call mouse_sendcmd
|
||||
call ps2_read ; AL = ID
|
||||
; Get ID
|
||||
mov bl, MOUSE_GET_ID
|
||||
call mouse_sendcmd
|
||||
call ps2_read ; AL = ID
|
||||
|
||||
cmp al, 03h
|
||||
je .is4
|
||||
cmp al, 04h
|
||||
je .is4
|
||||
cmp al, 03h
|
||||
je .is4
|
||||
cmp al, 04h
|
||||
je .is4
|
||||
ret
|
||||
.is4:
|
||||
mov byte [DBA_MOUSE_PACKETLEN], 4
|
||||
mov byte [DBA_MOUSE_PACKETLEN], 4
|
||||
ret
|
||||
|
||||
|
||||
; ------------------------------------------------------------
|
||||
; fonction de gestion du i8042
|
||||
;
|
||||
|
|
@ -190,25 +228,25 @@ ps2_wait_ready_write:
|
|||
in al, PS2_PORT_CTRL
|
||||
test al, 02h ; IBF
|
||||
jnz .wait
|
||||
ret
|
||||
ret
|
||||
|
||||
; attendre que le 8042 soit pret a lire de l'information
|
||||
; attendre que le 8042 soit pret a lire de l'information
|
||||
ps2_wait_ready_read:
|
||||
.wait:
|
||||
.wait:
|
||||
in al, PS2_PORT_CTRL
|
||||
test al, 01h ; OBF
|
||||
jz .wait
|
||||
ret
|
||||
|
||||
ret
|
||||
|
||||
; lire de l'information depuis le 8042
|
||||
ps2_read:
|
||||
ps2_read:
|
||||
call ps2_wait_ready_read
|
||||
in al, PS2_PORT_BUFFER
|
||||
ret
|
||||
ret
|
||||
|
||||
; vide le buffer interne du 8042 (information(s) ignorée(s))
|
||||
; vide le buffer interne du 8042 (information(s) ignorée(s))
|
||||
ps2_flush_output:
|
||||
.flush:
|
||||
.flush:
|
||||
in al, PS2_PORT_CTRL
|
||||
test al, 01h
|
||||
jz .done
|
||||
|
|
@ -216,14 +254,12 @@ ps2_flush_output:
|
|||
jmp .flush
|
||||
.done:
|
||||
ret
|
||||
|
||||
|
||||
|
||||
; ------------------------------------------------------------
|
||||
; envoye une commande souris
|
||||
; envoye une commande souris et attends le ACK
|
||||
;
|
||||
; BL = commande souris (ou data après une commande F3)
|
||||
;
|
||||
;
|
||||
; renvoi CF=0 si ACK, CF=1 sinon
|
||||
; ------------------------------------------------------------
|
||||
mouse_sendcmd:
|
||||
|
|
@ -231,11 +267,11 @@ mouse_sendcmd:
|
|||
|
||||
mov al, I8042_CMD_WRITE_AUX
|
||||
out PS2_PORT_CTRL, al
|
||||
|
||||
|
||||
call ps2_wait_ready_write
|
||||
mov al, bl
|
||||
out PS2_PORT_BUFFER, al
|
||||
|
||||
|
||||
call ps2_wait_ready_read ; AL = réponse
|
||||
cmp al, MOUSE_ACK
|
||||
jne .bad
|
||||
|
|
@ -244,48 +280,75 @@ mouse_sendcmd:
|
|||
.bad:
|
||||
stc
|
||||
ret
|
||||
|
||||
|
||||
; ------------------------------------------------------------
|
||||
; interrupt handler
|
||||
;
|
||||
;
|
||||
; buffer[0] = status
|
||||
; buffer[1] = déplacement x
|
||||
; buffer[2] = déplacement y (inversé)
|
||||
;
|
||||
; buffer[4] = molette (si PacketLen = 4)
|
||||
;
|
||||
; status byte :
|
||||
; bit 0 = bouton gauche
|
||||
; bit 1 = bouton droit
|
||||
; bit 2 = bouton milieu
|
||||
; bit 3 = toujours 1
|
||||
; bit 4 = X sign
|
||||
; bit 5 = Y sign
|
||||
; bit 6 = X overflow
|
||||
; bit 7 = Y overflow
|
||||
; ------------------------------------------------------------
|
||||
mouse_handler:
|
||||
push ax
|
||||
push bx
|
||||
|
||||
; use BDA segment
|
||||
PUSH_ABCD
|
||||
push ds
|
||||
mov ax,BDA_SEGMENT
|
||||
|
||||
; use BDA segment
|
||||
mov ax,BDA_MOUSE_SEG
|
||||
mov ds,ax
|
||||
xor bx,bx
|
||||
|
||||
in al, PS2_PORT_BUFFER ; lire octet souris
|
||||
mov [BDA_MOUSE_BUFFER + BDA_MOUSE_IDX], al
|
||||
inc [BDA_MOUSE_IDX]
|
||||
|
||||
cmp [BDA_MOUSE_IDX], 3
|
||||
|
||||
mov al, [DBA_MOUSE_PACKETLEN]
|
||||
cmp [BDA_MOUSE_IDX], al
|
||||
jne .done
|
||||
|
||||
mov [BDA_MOUSE_IDX], 0
|
||||
; decode buffer
|
||||
|
||||
; decode buffer manuallement
|
||||
mov al, [BDA_MOUSE_BUFFER]
|
||||
mov [BDA_MOUSE_STATUS], al
|
||||
|
||||
mov al, [BDA_MOUSE_BUFFER+1]
|
||||
cbw
|
||||
add [BDA_MOUSE_X], ax
|
||||
|
||||
|
||||
mov al, [BDA_MOUSE_BUFFER+2]
|
||||
cbw
|
||||
sub [BDA_MOUSE_Y], ax
|
||||
|
||||
; si packetlen = 4, gérer la molette; experimental
|
||||
mov al, [BDA_MOUSE_BUFFER+3]
|
||||
cbw
|
||||
sub [BDA_MOUSE_WHEEL], ax
|
||||
|
||||
; restaurer l'ancien arrière plan du curseur
|
||||
call gfx_cursor_restorebg
|
||||
|
||||
; sauvegarder le nouvel arrière plan du curseur
|
||||
mov cx, [BDA_MOUSE_X]
|
||||
mov dx, [BDA_MOUSE_Y]
|
||||
call gfx_cursor_savebg
|
||||
|
||||
call gfx_cursor_draw
|
||||
|
||||
.done:
|
||||
mov al, 0x20
|
||||
out 0xA0, al ; EOI PIC esclave
|
||||
out 0x20, al ; EOI PIC maître
|
||||
|
||||
|
||||
pop ds
|
||||
pop bx
|
||||
pop ax
|
||||
POP_ABCD
|
||||
iret
|
||||
|
|
@ -2,7 +2,6 @@
|
|||
; Project : Custom BIOS / ROM
|
||||
; File : generic.asm
|
||||
; Author : frater
|
||||
; Created : 06 jan 2026
|
||||
;
|
||||
; License : GNU General Public License v3.0 or later (GPL-3.0+)
|
||||
;
|
||||
|
|
@ -23,7 +22,7 @@
|
|||
|
||||
; ---------------------------------------------------------------------------
|
||||
; Détection RAM conventionnelle
|
||||
; Teste la RAM de MEM_SEG_DEB jusqu’à 0xA000 (640KB), par pas de 1KB.
|
||||
; Teste la RAM de MEM_SEG_DEB -> MEM_SEG_END (0xA000, 640KB), par pas de 1KB.
|
||||
; Méthode: sauvegarde 1 mot, écrit 2 patterns, relit, restaure.
|
||||
;
|
||||
; Résultats:
|
||||
|
|
@ -33,9 +32,9 @@
|
|||
; Précautions:
|
||||
; - Ne testez PAS une zone où se trouve votre pile / variables.
|
||||
; - Si votre pile est à 0000:7C00 (phys 0x7C00), commencez au moins à 0x0800.
|
||||
; - Ne testez pas au-delà de 0xA000 (début VGA/vidéo).
|
||||
; - Ne testez pas au-delà de MEM_SEG_END (0xA000: début VGA/vidéo).
|
||||
; ---------------------------------------------------------------------------
|
||||
setup_ram:
|
||||
ram_setup:
|
||||
xor ax, ax ; AX = compteur KB trouvés
|
||||
mov dx, MEM_SEG_DEB ; DX = segment courant testé
|
||||
mov cx, MEM_SEG_END ; CX = segment fin (exclu)
|
||||
|
|
@ -155,7 +154,7 @@ setup_check_vga:
|
|||
; ---------------------------------------------------------------------------
|
||||
; IVT install (8088, mode réel) - remplit les 256 vecteurs avec un handler IRET
|
||||
; ---------------------------------------------------------------------------
|
||||
setup_ivt:
|
||||
ivt_setup:
|
||||
; installation de la table d'interrupts
|
||||
xor ax, ax
|
||||
mov es, ax ; ES = 0000h -> base IVT
|
||||
|
|
@ -177,11 +176,11 @@ setup_ivt:
|
|||
; ---------------------------------------------------------------------------
|
||||
; IVT install (8088, mode réel) - installe un handler a une interrupt calculée
|
||||
;
|
||||
; ax = int ide
|
||||
; ax = int id
|
||||
; dx = segment handler
|
||||
; bx = offset handler
|
||||
; ---------------------------------------------------------------------------
|
||||
setup_setvector:
|
||||
ivt_setvector:
|
||||
push es
|
||||
push di
|
||||
|
||||
|
|
@ -192,9 +191,11 @@ setup_setvector:
|
|||
mov es, ax ; ES = 0000h -> base IVT
|
||||
|
||||
mov ax, bx ; offset du handler
|
||||
cli
|
||||
stosw ; write offset (AX) -> [ES:DI], DI += 2
|
||||
xchg ax, dx ; AX = segment, DX = offset
|
||||
stosw ; write segment (AX) -> [ES:DI], DI += 2
|
||||
sti
|
||||
|
||||
pop di
|
||||
pop es
|
||||
|
|
|
|||
45
src/services/macros.asm
Normal file
45
src/services/macros.asm
Normal file
|
|
@ -0,0 +1,45 @@
|
|||
; =============================================================================
|
||||
; Project : Custom BIOS / ROM
|
||||
; File : macros.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/>.
|
||||
;
|
||||
; =============================================================================
|
||||
|
||||
%macro PUSH_ABCD 0
|
||||
push ax
|
||||
push bx
|
||||
push cx
|
||||
push dx
|
||||
%endmacro
|
||||
|
||||
%macro PUSH_ID 0
|
||||
push di
|
||||
push si
|
||||
%endmacro
|
||||
|
||||
%macro POP_ABCD 0
|
||||
pop dx
|
||||
pop cx
|
||||
pop bx
|
||||
pop ax
|
||||
%endmacro
|
||||
|
||||
%macro POP_ID 0
|
||||
pop si
|
||||
pop di
|
||||
%endmacro
|
||||
Loading…
Reference in a new issue