| /* video.S |
| * |
| * Display adapter & video mode setup, version 2.13 (14-May-99) |
| * |
| * Copyright (C) 1995 -- 1998 Martin Mares <mj@ucw.cz> |
| * Based on the original setup.S code (C) Linus Torvalds and Mats Anderson |
| * |
| * Rewritten to use GNU 'as' by Chris Noe <stiker@northlink.com> May 1999 |
| * |
| * For further information, look at Documentation/svga.txt. |
| * |
| */ |
| |
| #include <linux/config.h> /* for CONFIG_VIDEO_* */ |
| |
| /* Enable autodetection of SVGA adapters and modes. */ |
| #undef CONFIG_VIDEO_SVGA |
| |
| /* Enable autodetection of VESA modes */ |
| #define CONFIG_VIDEO_VESA |
| |
| /* Enable compacting of mode table */ |
| #define CONFIG_VIDEO_COMPACT |
| |
| /* Retain screen contents when switching modes */ |
| #define CONFIG_VIDEO_RETAIN |
| |
| /* Enable local mode list */ |
| #undef CONFIG_VIDEO_LOCAL |
| |
| /* Force 400 scan lines for standard modes (hack to fix bad BIOS behaviour */ |
| #undef CONFIG_VIDEO_400_HACK |
| |
| /* Hack that lets you force specific BIOS mode ID and specific dimensions */ |
| #undef CONFIG_VIDEO_GFX_HACK |
| #define VIDEO_GFX_BIOS_AX 0x4f02 /* 800x600 on ThinkPad */ |
| #define VIDEO_GFX_BIOS_BX 0x0102 |
| #define VIDEO_GFX_DUMMY_RESOLUTION 0x6425 /* 100x37 */ |
| |
| /* This code uses an extended set of video mode numbers. These include: |
| * Aliases for standard modes |
| * NORMAL_VGA (-1) |
| * EXTENDED_VGA (-2) |
| * ASK_VGA (-3) |
| * Video modes numbered by menu position -- NOT RECOMMENDED because of lack |
| * of compatibility when extending the table. These are between 0x00 and 0xff. |
| */ |
| #define VIDEO_FIRST_MENU 0x0000 |
| |
| /* Standard BIOS video modes (BIOS number + 0x0100) */ |
| #define VIDEO_FIRST_BIOS 0x0100 |
| |
| /* VESA BIOS video modes (VESA number + 0x0200) */ |
| #define VIDEO_FIRST_VESA 0x0200 |
| |
| /* Video7 special modes (BIOS number + 0x0900) */ |
| #define VIDEO_FIRST_V7 0x0900 |
| |
| /* Special video modes */ |
| #define VIDEO_FIRST_SPECIAL 0x0f00 |
| #define VIDEO_80x25 0x0f00 |
| #define VIDEO_8POINT 0x0f01 |
| #define VIDEO_80x43 0x0f02 |
| #define VIDEO_80x28 0x0f03 |
| #define VIDEO_CURRENT_MODE 0x0f04 |
| #define VIDEO_80x30 0x0f05 |
| #define VIDEO_80x34 0x0f06 |
| #define VIDEO_80x60 0x0f07 |
| #define VIDEO_GFX_HACK 0x0f08 |
| #define VIDEO_LAST_SPECIAL 0x0f09 |
| |
| /* Video modes given by resolution */ |
| #define VIDEO_FIRST_RESOLUTION 0x1000 |
| |
| /* The "recalculate timings" flag */ |
| #define VIDEO_RECALC 0x8000 |
| |
| /* Positions of various video parameters passed to the kernel */ |
| /* (see also include/linux/tty.h) */ |
| #define PARAM_CURSOR_POS 0x00 |
| #define PARAM_VIDEO_PAGE 0x04 |
| #define PARAM_VIDEO_MODE 0x06 |
| #define PARAM_VIDEO_COLS 0x07 |
| #define PARAM_VIDEO_EGA_BX 0x0a |
| #define PARAM_VIDEO_LINES 0x0e |
| #define PARAM_HAVE_VGA 0x0f |
| #define PARAM_FONT_POINTS 0x10 |
| |
| #define PARAM_LFB_WIDTH 0x12 |
| #define PARAM_LFB_HEIGHT 0x14 |
| #define PARAM_LFB_DEPTH 0x16 |
| #define PARAM_LFB_BASE 0x18 |
| #define PARAM_LFB_SIZE 0x1c |
| #define PARAM_LFB_LINELENGTH 0x24 |
| #define PARAM_LFB_COLORS 0x26 |
| #define PARAM_VESAPM_SEG 0x2e |
| #define PARAM_VESAPM_OFF 0x30 |
| #define PARAM_LFB_PAGES 0x32 |
| #define PARAM_VESA_ATTRIB 0x34 |
| |
| /* Define DO_STORE according to CONFIG_VIDEO_RETAIN */ |
| #ifdef CONFIG_VIDEO_RETAIN |
| #define DO_STORE call store_screen |
| #else |
| #define DO_STORE |
| #endif /* CONFIG_VIDEO_RETAIN */ |
| |
| # This is the main entry point called by setup.S |
| # %ds *must* be pointing to the bootsector |
| video: pushw %ds # We use different segments |
| pushw %ds # FS contains original DS |
| popw %fs |
| pushw %cs # DS is equal to CS |
| popw %ds |
| pushw %cs # ES is equal to CS |
| popw %es |
| xorw %ax, %ax |
| movw %ax, %gs # GS is zero |
| cld |
| call basic_detect # Basic adapter type testing (EGA/VGA/MDA/CGA) |
| #ifdef CONFIG_VIDEO_SELECT |
| movw %fs:(0x01fa), %ax # User selected video mode |
| cmpw $ASK_VGA, %ax # Bring up the menu |
| jz vid2 |
| |
| call mode_set # Set the mode |
| jc vid1 |
| |
| leaw badmdt, %si # Invalid mode ID |
| call prtstr |
| vid2: call mode_menu |
| vid1: |
| #ifdef CONFIG_VIDEO_RETAIN |
| call restore_screen # Restore screen contents |
| #endif /* CONFIG_VIDEO_RETAIN */ |
| call store_edid |
| #endif /* CONFIG_VIDEO_SELECT */ |
| call mode_params # Store mode parameters |
| popw %ds # Restore original DS |
| ret |
| |
| # Detect if we have CGA, MDA, EGA or VGA and pass it to the kernel. |
| basic_detect: |
| movb $0, %fs:(PARAM_HAVE_VGA) |
| movb $0x12, %ah # Check EGA/VGA |
| movb $0x10, %bl |
| int $0x10 |
| movw %bx, %fs:(PARAM_VIDEO_EGA_BX) # Identifies EGA to the kernel |
| cmpb $0x10, %bl # No, it's a CGA/MDA/HGA card. |
| je basret |
| |
| incb adapter |
| movw $0x1a00, %ax # Check EGA or VGA? |
| int $0x10 |
| cmpb $0x1a, %al # 1a means VGA... |
| jne basret # anything else is EGA. |
| |
| incb %fs:(PARAM_HAVE_VGA) # We've detected a VGA |
| incb adapter |
| basret: ret |
| |
| # Store the video mode parameters for later usage by the kernel. |
| # This is done by asking the BIOS except for the rows/columns |
| # parameters in the default 80x25 mode -- these are set directly, |
| # because some very obscure BIOSes supply insane values. |
| mode_params: |
| #ifdef CONFIG_VIDEO_SELECT |
| cmpb $0, graphic_mode |
| jnz mopar_gr |
| #endif |
| movb $0x03, %ah # Read cursor position |
| xorb %bh, %bh |
| int $0x10 |
| movw %dx, %fs:(PARAM_CURSOR_POS) |
| movb $0x0f, %ah # Read page/mode/width |
| int $0x10 |
| movw %bx, %fs:(PARAM_VIDEO_PAGE) |
| movw %ax, %fs:(PARAM_VIDEO_MODE) # Video mode and screen width |
| cmpb $0x7, %al # MDA/HGA => segment differs |
| jnz mopar0 |
| |
| movw $0xb000, video_segment |
| mopar0: movw %gs:(0x485), %ax # Font size |
| movw %ax, %fs:(PARAM_FONT_POINTS) # (valid only on EGA/VGA) |
| movw force_size, %ax # Forced size? |
| orw %ax, %ax |
| jz mopar1 |
| |
| movb %ah, %fs:(PARAM_VIDEO_COLS) |
| movb %al, %fs:(PARAM_VIDEO_LINES) |
| ret |
| |
| mopar1: movb $25, %al |
| cmpb $0, adapter # If we are on CGA/MDA/HGA, the |
| jz mopar2 # screen must have 25 lines. |
| |
| movb %gs:(0x484), %al # On EGA/VGA, use the EGA+ BIOS |
| incb %al # location of max lines. |
| mopar2: movb %al, %fs:(PARAM_VIDEO_LINES) |
| ret |
| |
| #ifdef CONFIG_VIDEO_SELECT |
| # Fetching of VESA frame buffer parameters |
| mopar_gr: |
| leaw modelist+1024, %di |
| movb $0x23, %fs:(PARAM_HAVE_VGA) |
| movw 16(%di), %ax |
| movw %ax, %fs:(PARAM_LFB_LINELENGTH) |
| movw 18(%di), %ax |
| movw %ax, %fs:(PARAM_LFB_WIDTH) |
| movw 20(%di), %ax |
| movw %ax, %fs:(PARAM_LFB_HEIGHT) |
| movb 25(%di), %al |
| movb $0, %ah |
| movw %ax, %fs:(PARAM_LFB_DEPTH) |
| movb 29(%di), %al |
| movb $0, %ah |
| movw %ax, %fs:(PARAM_LFB_PAGES) |
| movl 40(%di), %eax |
| movl %eax, %fs:(PARAM_LFB_BASE) |
| movl 31(%di), %eax |
| movl %eax, %fs:(PARAM_LFB_COLORS) |
| movl 35(%di), %eax |
| movl %eax, %fs:(PARAM_LFB_COLORS+4) |
| movw 0(%di), %ax |
| movw %ax, %fs:(PARAM_VESA_ATTRIB) |
| |
| # get video mem size |
| leaw modelist+1024, %di |
| movw $0x4f00, %ax |
| int $0x10 |
| xorl %eax, %eax |
| movw 18(%di), %ax |
| movl %eax, %fs:(PARAM_LFB_SIZE) |
| |
| # switching the DAC to 8-bit is for <= 8 bpp only |
| movw %fs:(PARAM_LFB_DEPTH), %ax |
| cmpw $8, %ax |
| jg dac_done |
| |
| # get DAC switching capability |
| xorl %eax, %eax |
| movb 10(%di), %al |
| testb $1, %al |
| jz dac_set |
| |
| # attempt to switch DAC to 8-bit |
| movw $0x4f08, %ax |
| movw $0x0800, %bx |
| int $0x10 |
| cmpw $0x004f, %ax |
| jne dac_set |
| movb %bh, dac_size # store actual DAC size |
| |
| dac_set: |
| # set color size to DAC size |
| movb dac_size, %al |
| movb %al, %fs:(PARAM_LFB_COLORS+0) |
| movb %al, %fs:(PARAM_LFB_COLORS+2) |
| movb %al, %fs:(PARAM_LFB_COLORS+4) |
| movb %al, %fs:(PARAM_LFB_COLORS+6) |
| |
| # set color offsets to 0 |
| movb $0, %fs:(PARAM_LFB_COLORS+1) |
| movb $0, %fs:(PARAM_LFB_COLORS+3) |
| movb $0, %fs:(PARAM_LFB_COLORS+5) |
| movb $0, %fs:(PARAM_LFB_COLORS+7) |
| |
| dac_done: |
| # get protected mode interface informations |
| movw $0x4f0a, %ax |
| xorw %bx, %bx |
| xorw %di, %di |
| int $0x10 |
| cmp $0x004f, %ax |
| jnz no_pm |
| |
| movw %es, %fs:(PARAM_VESAPM_SEG) |
| movw %di, %fs:(PARAM_VESAPM_OFF) |
| no_pm: ret |
| |
| # The video mode menu |
| mode_menu: |
| leaw keymsg, %si # "Return/Space/Timeout" message |
| call prtstr |
| call flush |
| nokey: call getkt |
| |
| cmpb $0x0d, %al # ENTER ? |
| je listm # yes - manual mode selection |
| |
| cmpb $0x20, %al # SPACE ? |
| je defmd1 # no - repeat |
| |
| call beep |
| jmp nokey |
| |
| defmd1: ret # No mode chosen? Default 80x25 |
| |
| listm: call mode_table # List mode table |
| listm0: leaw name_bann, %si # Print adapter name |
| call prtstr |
| movw card_name, %si |
| orw %si, %si |
| jnz an2 |
| |
| movb adapter, %al |
| leaw old_name, %si |
| orb %al, %al |
| jz an1 |
| |
| leaw ega_name, %si |
| decb %al |
| jz an1 |
| |
| leaw vga_name, %si |
| jmp an1 |
| |
| an2: call prtstr |
| leaw svga_name, %si |
| an1: call prtstr |
| leaw listhdr, %si # Table header |
| call prtstr |
| movb $0x30, %dl # DL holds mode number |
| leaw modelist, %si |
| lm1: cmpw $ASK_VGA, (%si) # End? |
| jz lm2 |
| |
| movb %dl, %al # Menu selection number |
| call prtchr |
| call prtsp2 |
| lodsw |
| call prthw # Mode ID |
| call prtsp2 |
| movb 0x1(%si), %al |
| call prtdec # Rows |
| movb $0x78, %al # the letter 'x' |
| call prtchr |
| lodsw |
| call prtdec # Columns |
| movb $0x0d, %al # New line |
| call prtchr |
| movb $0x0a, %al |
| call prtchr |
| incb %dl # Next character |
| cmpb $0x3a, %dl |
| jnz lm1 |
| |
| movb $0x61, %dl |
| jmp lm1 |
| |
| lm2: leaw prompt, %si # Mode prompt |
| call prtstr |
| leaw edit_buf, %di # Editor buffer |
| lm3: call getkey |
| cmpb $0x0d, %al # Enter? |
| jz lment |
| |
| cmpb $0x08, %al # Backspace? |
| jz lmbs |
| |
| cmpb $0x20, %al # Printable? |
| jc lm3 |
| |
| cmpw $edit_buf+4, %di # Enough space? |
| jz lm3 |
| |
| stosb |
| call prtchr |
| jmp lm3 |
| |
| lmbs: cmpw $edit_buf, %di # Backspace |
| jz lm3 |
| |
| decw %di |
| movb $0x08, %al |
| call prtchr |
| call prtspc |
| movb $0x08, %al |
| call prtchr |
| jmp lm3 |
| |
| lment: movb $0, (%di) |
| leaw crlft, %si |
| call prtstr |
| leaw edit_buf, %si |
| cmpb $0, (%si) # Empty string = default mode |
| jz lmdef |
| |
| cmpb $0, 1(%si) # One character = menu selection |
| jz mnusel |
| |
| cmpw $0x6373, (%si) # "scan" => mode scanning |
| jnz lmhx |
| |
| cmpw $0x6e61, 2(%si) |
| jz lmscan |
| |
| lmhx: xorw %bx, %bx # Else => mode ID in hex |
| lmhex: lodsb |
| orb %al, %al |
| jz lmuse1 |
| |
| subb $0x30, %al |
| jc lmbad |
| |
| cmpb $10, %al |
| jc lmhx1 |
| |
| subb $7, %al |
| andb $0xdf, %al |
| cmpb $10, %al |
| jc lmbad |
| |
| cmpb $16, %al |
| jnc lmbad |
| |
| lmhx1: shlw $4, %bx |
| orb %al, %bl |
| jmp lmhex |
| |
| lmuse1: movw %bx, %ax |
| jmp lmuse |
| |
| mnusel: lodsb # Menu selection |
| xorb %ah, %ah |
| subb $0x30, %al |
| jc lmbad |
| |
| cmpb $10, %al |
| jc lmuse |
| |
| cmpb $0x61-0x30, %al |
| jc lmbad |
| |
| subb $0x61-0x30-10, %al |
| cmpb $36, %al |
| jnc lmbad |
| |
| lmuse: call mode_set |
| jc lmdef |
| |
| lmbad: leaw unknt, %si |
| call prtstr |
| jmp lm2 |
| lmscan: cmpb $0, adapter # Scanning only on EGA/VGA |
| jz lmbad |
| |
| movw $0, mt_end # Scanning of modes is |
| movb $1, scanning # done as new autodetection. |
| call mode_table |
| jmp listm0 |
| lmdef: ret |
| |
| # Additional parts of mode_set... (relative jumps, you know) |
| setv7: # Video7 extended modes |
| DO_STORE |
| subb $VIDEO_FIRST_V7>>8, %bh |
| movw $0x6f05, %ax |
| int $0x10 |
| stc |
| ret |
| |
| _setrec: jmp setrec # Ugly... |
| _set_80x25: jmp set_80x25 |
| |
| # Aliases for backward compatibility. |
| setalias: |
| movw $VIDEO_80x25, %ax |
| incw %bx |
| jz mode_set |
| |
| movb $VIDEO_8POINT-VIDEO_FIRST_SPECIAL, %al |
| incw %bx |
| jnz setbad # Fall-through! |
| |
| # Setting of user mode (AX=mode ID) => CF=success |
| mode_set: |
| movw %ax, %fs:(0x01fa) # Store mode for use in acpi_wakeup.S |
| movw %ax, %bx |
| cmpb $0xff, %ah |
| jz setalias |
| |
| testb $VIDEO_RECALC>>8, %ah |
| jnz _setrec |
| |
| cmpb $VIDEO_FIRST_RESOLUTION>>8, %ah |
| jnc setres |
| |
| cmpb $VIDEO_FIRST_SPECIAL>>8, %ah |
| jz setspc |
| |
| cmpb $VIDEO_FIRST_V7>>8, %ah |
| jz setv7 |
| |
| cmpb $VIDEO_FIRST_VESA>>8, %ah |
| jnc check_vesa |
| |
| orb %ah, %ah |
| jz setmenu |
| |
| decb %ah |
| jz setbios |
| |
| setbad: clc |
| movb $0, do_restore # The screen needn't be restored |
| ret |
| |
| setvesa: |
| DO_STORE |
| subb $VIDEO_FIRST_VESA>>8, %bh |
| movw $0x4f02, %ax # VESA BIOS mode set call |
| int $0x10 |
| cmpw $0x004f, %ax # AL=4f if implemented |
| jnz setbad # AH=0 if OK |
| |
| stc |
| ret |
| |
| setbios: |
| DO_STORE |
| int $0x10 # Standard BIOS mode set call |
| pushw %bx |
| movb $0x0f, %ah # Check if really set |
| int $0x10 |
| popw %bx |
| cmpb %bl, %al |
| jnz setbad |
| |
| stc |
| ret |
| |
| setspc: xorb %bh, %bh # Set special mode |
| cmpb $VIDEO_LAST_SPECIAL-VIDEO_FIRST_SPECIAL, %bl |
| jnc setbad |
| |
| addw %bx, %bx |
| jmp *spec_inits(%bx) |
| |
| setmenu: |
| orb %al, %al # 80x25 is an exception |
| jz _set_80x25 |
| |
| pushw %bx # Set mode chosen from menu |
| call mode_table # Build the mode table |
| popw %ax |
| shlw $2, %ax |
| addw %ax, %si |
| cmpw %di, %si |
| jnc setbad |
| |
| movw (%si), %ax # Fetch mode ID |
| _m_s: jmp mode_set |
| |
| setres: pushw %bx # Set mode chosen by resolution |
| call mode_table |
| popw %bx |
| xchgb %bl, %bh |
| setr1: lodsw |
| cmpw $ASK_VGA, %ax # End of the list? |
| jz setbad |
| |
| lodsw |
| cmpw %bx, %ax |
| jnz setr1 |
| |
| movw -4(%si), %ax # Fetch mode ID |
| jmp _m_s |
| |
| check_vesa: |
| leaw modelist+1024, %di |
| subb $VIDEO_FIRST_VESA>>8, %bh |
| movw %bx, %cx # Get mode information structure |
| movw $0x4f01, %ax |
| int $0x10 |
| addb $VIDEO_FIRST_VESA>>8, %bh |
| cmpw $0x004f, %ax |
| jnz setbad |
| |
| movb (%di), %al # Check capabilities. |
| andb $0x19, %al |
| cmpb $0x09, %al |
| jz setvesa # This is a text mode |
| |
| movb (%di), %al # Check capabilities. |
| andb $0x99, %al |
| cmpb $0x99, %al |
| jnz _setbad # Doh! No linear frame buffer. |
| |
| subb $VIDEO_FIRST_VESA>>8, %bh |
| orw $0x4000, %bx # Use linear frame buffer |
| movw $0x4f02, %ax # VESA BIOS mode set call |
| int $0x10 |
| cmpw $0x004f, %ax # AL=4f if implemented |
| jnz _setbad # AH=0 if OK |
| |
| movb $1, graphic_mode # flag graphic mode |
| movb $0, do_restore # no screen restore |
| stc |
| ret |
| |
| _setbad: jmp setbad # Ugly... |
| |
| # Recalculate vertical display end registers -- this fixes various |
| # inconsistencies of extended modes on many adapters. Called when |
| # the VIDEO_RECALC flag is set in the mode ID. |
| |
| setrec: subb $VIDEO_RECALC>>8, %ah # Set the base mode |
| call mode_set |
| jnc rct3 |
| |
| movw %gs:(0x485), %ax # Font size in pixels |
| movb %gs:(0x484), %bl # Number of rows |
| incb %bl |
| mulb %bl # Number of visible |
| decw %ax # scan lines - 1 |
| movw $0x3d4, %dx |
| movw %ax, %bx |
| movb $0x12, %al # Lower 8 bits |
| movb %bl, %ah |
| outw %ax, %dx |
| movb $0x07, %al # Bits 8 and 9 in the overflow register |
| call inidx |
| xchgb %al, %ah |
| andb $0xbd, %ah |
| shrb %bh |
| jnc rct1 |
| orb $0x02, %ah |
| rct1: shrb %bh |
| jnc rct2 |
| orb $0x40, %ah |
| rct2: movb $0x07, %al |
| outw %ax, %dx |
| stc |
| rct3: ret |
| |
| # Table of routines for setting of the special modes. |
| spec_inits: |
| .word set_80x25 |
| .word set_8pixel |
| .word set_80x43 |
| .word set_80x28 |
| .word set_current |
| .word set_80x30 |
| .word set_80x34 |
| .word set_80x60 |
| .word set_gfx |
| |
| # Set the 80x25 mode. If already set, do nothing. |
| set_80x25: |
| movw $0x5019, force_size # Override possibly broken BIOS |
| use_80x25: |
| #ifdef CONFIG_VIDEO_400_HACK |
| movw $0x1202, %ax # Force 400 scan lines |
| movb $0x30, %bl |
| int $0x10 |
| #else |
| movb $0x0f, %ah # Get current mode ID |
| int $0x10 |
| cmpw $0x5007, %ax # Mode 7 (80x25 mono) is the only one available |
| jz st80 # on CGA/MDA/HGA and is also available on EGAM |
| |
| cmpw $0x5003, %ax # Unknown mode, force 80x25 color |
| jnz force3 |
| |
| st80: cmpb $0, adapter # CGA/MDA/HGA => mode 3/7 is always 80x25 |
| jz set80 |
| |
| movb %gs:(0x0484), %al # This is EGA+ -- beware of 80x50 etc. |
| orb %al, %al # Some buggy BIOS'es set 0 rows |
| jz set80 |
| |
| cmpb $24, %al # It's hopefully correct |
| jz set80 |
| #endif /* CONFIG_VIDEO_400_HACK */ |
| force3: DO_STORE |
| movw $0x0003, %ax # Forced set |
| int $0x10 |
| set80: stc |
| ret |
| |
| # Set the 80x50/80x43 8-pixel mode. Simple BIOS calls. |
| set_8pixel: |
| DO_STORE |
| call use_80x25 # The base is 80x25 |
| set_8pt: |
| movw $0x1112, %ax # Use 8x8 font |
| xorb %bl, %bl |
| int $0x10 |
| movw $0x1200, %ax # Use alternate print screen |
| movb $0x20, %bl |
| int $0x10 |
| movw $0x1201, %ax # Turn off cursor emulation |
| movb $0x34, %bl |
| int $0x10 |
| movb $0x01, %ah # Define cursor scan lines 6-7 |
| movw $0x0607, %cx |
| int $0x10 |
| set_current: |
| stc |
| ret |
| |
| # Set the 80x28 mode. This mode works on all VGA's, because it's a standard |
| # 80x25 mode with 14-point fonts instead of 16-point. |
| set_80x28: |
| DO_STORE |
| call use_80x25 # The base is 80x25 |
| set14: movw $0x1111, %ax # Use 9x14 font |
| xorb %bl, %bl |
| int $0x10 |
| movb $0x01, %ah # Define cursor scan lines 11-12 |
| movw $0x0b0c, %cx |
| int $0x10 |
| stc |
| ret |
| |
| # Set the 80x43 mode. This mode is works on all VGA's. |
| # It's a 350-scanline mode with 8-pixel font. |
| set_80x43: |
| DO_STORE |
| movw $0x1201, %ax # Set 350 scans |
| movb $0x30, %bl |
| int $0x10 |
| movw $0x0003, %ax # Reset video mode |
| int $0x10 |
| jmp set_8pt # Use 8-pixel font |
| |
| # Set the 80x30 mode (all VGA's). 480 scanlines, 16-pixel font. |
| set_80x30: |
| call use_80x25 # Start with real 80x25 |
| DO_STORE |
| movw $0x3cc, %dx # Get CRTC port |
| inb %dx, %al |
| movb $0xd4, %dl |
| rorb %al # Mono or color? |
| jc set48a |
| |
| movb $0xb4, %dl |
| set48a: movw $0x0c11, %ax # Vertical sync end (also unlocks CR0-7) |
| call outidx |
| movw $0x0b06, %ax # Vertical total |
| call outidx |
| movw $0x3e07, %ax # (Vertical) overflow |
| call outidx |
| movw $0xea10, %ax # Vertical sync start |
| call outidx |
| movw $0xdf12, %ax # Vertical display end |
| call outidx |
| movw $0xe715, %ax # Vertical blank start |
| call outidx |
| movw $0x0416, %ax # Vertical blank end |
| call outidx |
| pushw %dx |
| movb $0xcc, %dl # Misc output register (read) |
| inb %dx, %al |
| movb $0xc2, %dl # (write) |
| andb $0x0d, %al # Preserve clock select bits and color bit |
| orb $0xe2, %al # Set correct sync polarity |
| outb %al, %dx |
| popw %dx |
| movw $0x501e, force_size |
| stc # That's all. |
| ret |
| |
| # Set the 80x34 mode (all VGA's). 480 scans, 14-pixel font. |
| set_80x34: |
| call set_80x30 # Set 480 scans |
| call set14 # And 14-pt font |
| movw $0xdb12, %ax # VGA vertical display end |
| movw $0x5022, force_size |
| setvde: call outidx |
| stc |
| ret |
| |
| # Set the 80x60 mode (all VGA's). 480 scans, 8-pixel font. |
| set_80x60: |
| call set_80x30 # Set 480 scans |
| call set_8pt # And 8-pt font |
| movw $0xdf12, %ax # VGA vertical display end |
| movw $0x503c, force_size |
| jmp setvde |
| |
| # Special hack for ThinkPad graphics |
| set_gfx: |
| #ifdef CONFIG_VIDEO_GFX_HACK |
| movw $VIDEO_GFX_BIOS_AX, %ax |
| movw $VIDEO_GFX_BIOS_BX, %bx |
| int $0x10 |
| movw $VIDEO_GFX_DUMMY_RESOLUTION, force_size |
| stc |
| #endif |
| ret |
| |
| #ifdef CONFIG_VIDEO_RETAIN |
| |
| # Store screen contents to temporary buffer. |
| store_screen: |
| cmpb $0, do_restore # Already stored? |
| jnz stsr |
| |
| testb $CAN_USE_HEAP, loadflags # Have we space for storing? |
| jz stsr |
| |
| pushw %ax |
| pushw %bx |
| pushw force_size # Don't force specific size |
| movw $0, force_size |
| call mode_params # Obtain params of current mode |
| popw force_size |
| movb %fs:(PARAM_VIDEO_LINES), %ah |
| movb %fs:(PARAM_VIDEO_COLS), %al |
| movw %ax, %bx # BX=dimensions |
| mulb %ah |
| movw %ax, %cx # CX=number of characters |
| addw %ax, %ax # Calculate image size |
| addw $modelist+1024+4, %ax |
| cmpw heap_end_ptr, %ax |
| jnc sts1 # Unfortunately, out of memory |
| |
| movw %fs:(PARAM_CURSOR_POS), %ax # Store mode params |
| leaw modelist+1024, %di |
| stosw |
| movw %bx, %ax |
| stosw |
| pushw %ds # Store the screen |
| movw video_segment, %ds |
| xorw %si, %si |
| rep |
| movsw |
| popw %ds |
| incb do_restore # Screen will be restored later |
| sts1: popw %bx |
| popw %ax |
| stsr: ret |
| |
| # Restore screen contents from temporary buffer. |
| restore_screen: |
| cmpb $0, do_restore # Has the screen been stored? |
| jz res1 |
| |
| call mode_params # Get parameters of current mode |
| movb %fs:(PARAM_VIDEO_LINES), %cl |
| movb %fs:(PARAM_VIDEO_COLS), %ch |
| leaw modelist+1024, %si # Screen buffer |
| lodsw # Set cursor position |
| movw %ax, %dx |
| cmpb %cl, %dh |
| jc res2 |
| |
| movb %cl, %dh |
| decb %dh |
| res2: cmpb %ch, %dl |
| jc res3 |
| |
| movb %ch, %dl |
| decb %dl |
| res3: movb $0x02, %ah |
| movb $0x00, %bh |
| int $0x10 |
| lodsw # Display size |
| movb %ah, %dl # DL=number of lines |
| movb $0, %ah # BX=phys. length of orig. line |
| movw %ax, %bx |
| cmpb %cl, %dl # Too many? |
| jc res4 |
| |
| pushw %ax |
| movb %dl, %al |
| subb %cl, %al |
| mulb %bl |
| addw %ax, %si |
| addw %ax, %si |
| popw %ax |
| movb %cl, %dl |
| res4: cmpb %ch, %al # Too wide? |
| jc res5 |
| |
| movb %ch, %al # AX=width of src. line |
| res5: movb $0, %cl |
| xchgb %ch, %cl |
| movw %cx, %bp # BP=width of dest. line |
| pushw %es |
| movw video_segment, %es |
| xorw %di, %di # Move the data |
| addw %bx, %bx # Convert BX and BP to _bytes_ |
| addw %bp, %bp |
| res6: pushw %si |
| pushw %di |
| movw %ax, %cx |
| rep |
| movsw |
| popw %di |
| popw %si |
| addw %bp, %di |
| addw %bx, %si |
| decb %dl |
| jnz res6 |
| |
| popw %es # Done |
| res1: ret |
| #endif /* CONFIG_VIDEO_RETAIN */ |
| |
| # Write to indexed VGA register (AL=index, AH=data, DX=index reg. port) |
| outidx: outb %al, %dx |
| pushw %ax |
| movb %ah, %al |
| incw %dx |
| outb %al, %dx |
| decw %dx |
| popw %ax |
| ret |
| |
| # Build the table of video modes (stored after the setup.S code at the |
| # `modelist' label. Each video mode record looks like: |
| # .word MODE-ID (our special mode ID (see above)) |
| # .byte rows (number of rows) |
| # .byte columns (number of columns) |
| # Returns address of the end of the table in DI, the end is marked |
| # with a ASK_VGA ID. |
| mode_table: |
| movw mt_end, %di # Already filled? |
| orw %di, %di |
| jnz mtab1x |
| |
| leaw modelist, %di # Store standard modes: |
| movl $VIDEO_80x25 + 0x50190000, %eax # The 80x25 mode (ALL) |
| stosl |
| movb adapter, %al # CGA/MDA/HGA -- no more modes |
| orb %al, %al |
| jz mtabe |
| |
| decb %al |
| jnz mtabv |
| |
| movl $VIDEO_8POINT + 0x502b0000, %eax # The 80x43 EGA mode |
| stosl |
| jmp mtabe |
| |
| mtab1x: jmp mtab1 |
| |
| mtabv: leaw vga_modes, %si # All modes for std VGA |
| movw $vga_modes_end-vga_modes, %cx |
| rep # I'm unable to use movsw as I don't know how to store a half |
| movsb # of the expression above to cx without using explicit shr. |
| |
| cmpb $0, scanning # Mode scan requested? |
| jz mscan1 |
| |
| call mode_scan |
| mscan1: |
| |
| #ifdef CONFIG_VIDEO_LOCAL |
| call local_modes |
| #endif /* CONFIG_VIDEO_LOCAL */ |
| |
| #ifdef CONFIG_VIDEO_VESA |
| call vesa_modes # Detect VESA VGA modes |
| #endif /* CONFIG_VIDEO_VESA */ |
| |
| #ifdef CONFIG_VIDEO_SVGA |
| cmpb $0, scanning # Bypass when scanning |
| jnz mscan2 |
| |
| call svga_modes # Detect SVGA cards & modes |
| mscan2: |
| #endif /* CONFIG_VIDEO_SVGA */ |
| |
| mtabe: |
| |
| #ifdef CONFIG_VIDEO_COMPACT |
| leaw modelist, %si |
| movw %di, %dx |
| movw %si, %di |
| cmt1: cmpw %dx, %si # Scan all modes |
| jz cmt2 |
| |
| leaw modelist, %bx # Find in previous entries |
| movw 2(%si), %cx |
| cmt3: cmpw %bx, %si |
| jz cmt4 |
| |
| cmpw 2(%bx), %cx # Found => don't copy this entry |
| jz cmt5 |
| |
| addw $4, %bx |
| jmp cmt3 |
| |
| cmt4: movsl # Copy entry |
| jmp cmt1 |
| |
| cmt5: addw $4, %si # Skip entry |
| jmp cmt1 |
| |
| cmt2: |
| #endif /* CONFIG_VIDEO_COMPACT */ |
| |
| movw $ASK_VGA, (%di) # End marker |
| movw %di, mt_end |
| mtab1: leaw modelist, %si # SI=mode list, DI=list end |
| ret0: ret |
| |
| # Modes usable on all standard VGAs |
| vga_modes: |
| .word VIDEO_8POINT |
| .word 0x5032 # 80x50 |
| .word VIDEO_80x43 |
| .word 0x502b # 80x43 |
| .word VIDEO_80x28 |
| .word 0x501c # 80x28 |
| .word VIDEO_80x30 |
| .word 0x501e # 80x30 |
| .word VIDEO_80x34 |
| .word 0x5022 # 80x34 |
| .word VIDEO_80x60 |
| .word 0x503c # 80x60 |
| #ifdef CONFIG_VIDEO_GFX_HACK |
| .word VIDEO_GFX_HACK |
| .word VIDEO_GFX_DUMMY_RESOLUTION |
| #endif |
| |
| vga_modes_end: |
| # Detect VESA modes. |
| |
| #ifdef CONFIG_VIDEO_VESA |
| vesa_modes: |
| cmpb $2, adapter # VGA only |
| jnz ret0 |
| |
| movw %di, %bp # BP=original mode table end |
| addw $0x200, %di # Buffer space |
| movw $0x4f00, %ax # VESA Get card info call |
| int $0x10 |
| movw %bp, %di |
| cmpw $0x004f, %ax # Successful? |
| jnz ret0 |
| |
| cmpw $0x4556, 0x200(%di) |
| jnz ret0 |
| |
| cmpw $0x4153, 0x202(%di) |
| jnz ret0 |
| |
| movw $vesa_name, card_name # Set name to "VESA VGA" |
| pushw %gs |
| lgsw 0x20e(%di), %si # GS:SI=mode list |
| movw $128, %cx # Iteration limit |
| vesa1: |
| # gas version 2.9.1, using BFD version 2.9.1.0.23 buggers the next inst. |
| # XXX: lodsw %gs:(%si), %ax # Get next mode in the list |
| gs; lodsw |
| cmpw $0xffff, %ax # End of the table? |
| jz vesar |
| |
| cmpw $0x0080, %ax # Check validity of mode ID |
| jc vesa2 |
| |
| orb %ah, %ah # Valid IDs: 0x0000-0x007f/0x0100-0x07ff |
| jz vesan # Certain BIOSes report 0x80-0xff! |
| |
| cmpw $0x0800, %ax |
| jnc vesae |
| |
| vesa2: pushw %cx |
| movw %ax, %cx # Get mode information structure |
| movw $0x4f01, %ax |
| int $0x10 |
| movw %cx, %bx # BX=mode number |
| addb $VIDEO_FIRST_VESA>>8, %bh |
| popw %cx |
| cmpw $0x004f, %ax |
| jnz vesan # Don't report errors (buggy BIOSES) |
| |
| movb (%di), %al # Check capabilities. We require |
| andb $0x19, %al # a color text mode. |
| cmpb $0x09, %al |
| jnz vesan |
| |
| cmpw $0xb800, 8(%di) # Standard video memory address required |
| jnz vesan |
| |
| testb $2, (%di) # Mode characteristics supplied? |
| movw %bx, (%di) # Store mode number |
| jz vesa3 |
| |
| xorw %dx, %dx |
| movw 0x12(%di), %bx # Width |
| orb %bh, %bh |
| jnz vesan |
| |
| movb %bl, 0x3(%di) |
| movw 0x14(%di), %ax # Height |
| orb %ah, %ah |
| jnz vesan |
| |
| movb %al, 2(%di) |
| mulb %bl |
| cmpw $8193, %ax # Small enough for Linux console driver? |
| jnc vesan |
| |
| jmp vesaok |
| |
| vesa3: subw $0x8108, %bx # This mode has no detailed info specified, |
| jc vesan # so it must be a standard VESA mode. |
| |
| cmpw $5, %bx |
| jnc vesan |
| |
| movw vesa_text_mode_table(%bx), %ax |
| movw %ax, 2(%di) |
| vesaok: addw $4, %di # The mode is valid. Store it. |
| vesan: loop vesa1 # Next mode. Limit exceeded => error |
| vesae: leaw vesaer, %si |
| call prtstr |
| movw %bp, %di # Discard already found modes. |
| vesar: popw %gs |
| ret |
| |
| # Dimensions of standard VESA text modes |
| vesa_text_mode_table: |
| .byte 60, 80 # 0108 |
| .byte 25, 132 # 0109 |
| .byte 43, 132 # 010A |
| .byte 50, 132 # 010B |
| .byte 60, 132 # 010C |
| #endif /* CONFIG_VIDEO_VESA */ |
| |
| # Scan for video modes. A bit dirty, but should work. |
| mode_scan: |
| movw $0x0100, %cx # Start with mode 0 |
| scm1: movb $0, %ah # Test the mode |
| movb %cl, %al |
| int $0x10 |
| movb $0x0f, %ah |
| int $0x10 |
| cmpb %cl, %al |
| jnz scm2 # Mode not set |
| |
| movw $0x3c0, %dx # Test if it's a text mode |
| movb $0x10, %al # Mode bits |
| call inidx |
| andb $0x03, %al |
| jnz scm2 |
| |
| movb $0xce, %dl # Another set of mode bits |
| movb $0x06, %al |
| call inidx |
| shrb %al |
| jc scm2 |
| |
| movb $0xd4, %dl # Cursor location |
| movb $0x0f, %al |
| call inidx |
| orb %al, %al |
| jnz scm2 |
| |
| movw %cx, %ax # Ok, store the mode |
| stosw |
| movb %gs:(0x484), %al # Number of rows |
| incb %al |
| stosb |
| movw %gs:(0x44a), %ax # Number of columns |
| stosb |
| scm2: incb %cl |
| jns scm1 |
| |
| movw $0x0003, %ax # Return back to mode 3 |
| int $0x10 |
| ret |
| |
| tstidx: outw %ax, %dx # OUT DX,AX and inidx |
| inidx: outb %al, %dx # Read from indexed VGA register |
| incw %dx # AL=index, DX=index reg port -> AL=data |
| inb %dx, %al |
| decw %dx |
| ret |
| |
| # Try to detect type of SVGA card and supply (usually approximate) video |
| # mode table for it. |
| |
| #ifdef CONFIG_VIDEO_SVGA |
| svga_modes: |
| leaw svga_table, %si # Test all known SVGA adapters |
| dosvga: lodsw |
| movw %ax, %bp # Default mode table |
| orw %ax, %ax |
| jz didsv1 |
| |
| lodsw # Pointer to test routine |
| pushw %si |
| pushw %di |
| pushw %es |
| movw $0xc000, %bx |
| movw %bx, %es |
| call *%ax # Call test routine |
| popw %es |
| popw %di |
| popw %si |
| orw %bp, %bp |
| jz dosvga |
| |
| movw %bp, %si # Found, copy the modes |
| movb svga_prefix, %ah |
| cpsvga: lodsb |
| orb %al, %al |
| jz didsv |
| |
| stosw |
| movsw |
| jmp cpsvga |
| |
| didsv: movw %si, card_name # Store pointer to card name |
| didsv1: ret |
| |
| # Table of all known SVGA cards. For each card, we store a pointer to |
| # a table of video modes supported by the card and a pointer to a routine |
| # used for testing of presence of the card. The video mode table is always |
| # followed by the name of the card or the chipset. |
| svga_table: |
| .word ati_md, ati_test |
| .word oak_md, oak_test |
| .word paradise_md, paradise_test |
| .word realtek_md, realtek_test |
| .word s3_md, s3_test |
| .word chips_md, chips_test |
| .word video7_md, video7_test |
| .word cirrus5_md, cirrus5_test |
| .word cirrus6_md, cirrus6_test |
| .word cirrus1_md, cirrus1_test |
| .word ahead_md, ahead_test |
| .word everex_md, everex_test |
| .word genoa_md, genoa_test |
| .word trident_md, trident_test |
| .word tseng_md, tseng_test |
| .word 0 |
| |
| # Test routines and mode tables: |
| |
| # S3 - The test algorithm was taken from the SuperProbe package |
| # for XFree86 1.2.1. Report bugs to Christoph.Niemann@linux.org |
| s3_test: |
| movw $0x0f35, %cx # we store some constants in cl/ch |
| movw $0x03d4, %dx |
| movb $0x38, %al |
| call inidx |
| movb %al, %bh # store current CRT-register 0x38 |
| movw $0x0038, %ax |
| call outidx # disable writing to special regs |
| movb %cl, %al # check whether we can write special reg 0x35 |
| call inidx |
| movb %al, %bl # save the current value of CRT reg 0x35 |
| andb $0xf0, %al # clear bits 0-3 |
| movb %al, %ah |
| movb %cl, %al # and write it to CRT reg 0x35 |
| call outidx |
| call inidx # now read it back |
| andb %ch, %al # clear the upper 4 bits |
| jz s3_2 # the first test failed. But we have a |
| |
| movb %bl, %ah # second chance |
| movb %cl, %al |
| call outidx |
| jmp s3_1 # do the other tests |
| |
| s3_2: movw %cx, %ax # load ah with 0xf and al with 0x35 |
| orb %bl, %ah # set the upper 4 bits of ah with the orig value |
| call outidx # write ... |
| call inidx # ... and reread |
| andb %cl, %al # turn off the upper 4 bits |
| pushw %ax |
| movb %bl, %ah # restore old value in register 0x35 |
| movb %cl, %al |
| call outidx |
| popw %ax |
| cmpb %ch, %al # setting lower 4 bits was successful => bad |
| je no_s3 # writing is allowed => this is not an S3 |
| |
| s3_1: movw $0x4838, %ax # allow writing to special regs by putting |
| call outidx # magic number into CRT-register 0x38 |
| movb %cl, %al # check whether we can write special reg 0x35 |
| call inidx |
| movb %al, %bl |
| andb $0xf0, %al |
| movb %al, %ah |
| movb %cl, %al |
| call outidx |
| call inidx |
| andb %ch, %al |
| jnz no_s3 # no, we can't write => no S3 |
| |
| movw %cx, %ax |
| orb %bl, %ah |
| call outidx |
| call inidx |
| andb %ch, %al |
| pushw %ax |
| movb %bl, %ah # restore old value in register 0x35 |
| movb %cl, %al |
| call outidx |
| popw %ax |
| cmpb %ch, %al |
| jne no_s31 # writing not possible => no S3 |
| movb $0x30, %al |
| call inidx # now get the S3 id ... |
| leaw idS3, %di |
| movw $0x10, %cx |
| repne |
| scasb |
| je no_s31 |
| |
| movb %bh, %ah |
| movb $0x38, %al |
| jmp s3rest |
| |
| no_s3: movb $0x35, %al # restore CRT register 0x35 |
| movb %bl, %ah |
| call outidx |
| no_s31: xorw %bp, %bp # Detection failed |
| s3rest: movb %bh, %ah |
| movb $0x38, %al # restore old value of CRT register 0x38 |
| jmp outidx |
| |
| idS3: .byte 0x81, 0x82, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95 |
| .byte 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa8, 0xb0 |
| |
| s3_md: .byte 0x54, 0x2b, 0x84 |
| .byte 0x55, 0x19, 0x84 |
| .byte 0 |
| .ascii "S3" |
| .byte 0 |
| |
| # ATI cards. |
| ati_test: |
| leaw idati, %si |
| movw $0x31, %di |
| movw $0x09, %cx |
| repe |
| cmpsb |
| je atiok |
| |
| xorw %bp, %bp |
| atiok: ret |
| |
| idati: .ascii "761295520" |
| |
| ati_md: .byte 0x23, 0x19, 0x84 |
| .byte 0x33, 0x2c, 0x84 |
| .byte 0x22, 0x1e, 0x64 |
| .byte 0x21, 0x19, 0x64 |
| .byte 0x58, 0x21, 0x50 |
| .byte 0x5b, 0x1e, 0x50 |
| .byte 0 |
| .ascii "ATI" |
| .byte 0 |
| |
| # AHEAD |
| ahead_test: |
| movw $0x200f, %ax |
| movw $0x3ce, %dx |
| outw %ax, %dx |
| incw %dx |
| inb %dx, %al |
| cmpb $0x20, %al |
| je isahed |
| |
| cmpb $0x21, %al |
| je isahed |
| |
| xorw %bp, %bp |
| isahed: ret |
| |
| ahead_md: |
| .byte 0x22, 0x2c, 0x84 |
| .byte 0x23, 0x19, 0x84 |
| .byte 0x24, 0x1c, 0x84 |
| .byte 0x2f, 0x32, 0xa0 |
| .byte 0x32, 0x22, 0x50 |
| .byte 0x34, 0x42, 0x50 |
| .byte 0 |
| .ascii "Ahead" |
| .byte 0 |
| |
| # Chips & Tech. |
| chips_test: |
| movw $0x3c3, %dx |
| inb %dx, %al |
| orb $0x10, %al |
| outb %al, %dx |
| movw $0x104, %dx |
| inb %dx, %al |
| movb %al, %bl |
| movw $0x3c3, %dx |
| inb %dx, %al |
| andb $0xef, %al |
| outb %al, %dx |
| cmpb $0xa5, %bl |
| je cantok |
| |
| xorw %bp, %bp |
| cantok: ret |
| |
| chips_md: |
| .byte 0x60, 0x19, 0x84 |
| .byte 0x61, 0x32, 0x84 |
| .byte 0 |
| .ascii "Chips & Technologies" |
| .byte 0 |
| |
| # Cirrus Logic 5X0 |
| cirrus1_test: |
| movw $0x3d4, %dx |
| movb $0x0c, %al |
| outb %al, %dx |
| incw %dx |
| inb %dx, %al |
| movb %al, %bl |
| xorb %al, %al |
| outb %al, %dx |
| decw %dx |
| movb $0x1f, %al |
| outb %al, %dx |
| incw %dx |
| inb %dx, %al |
| movb %al, %bh |
| xorb %ah, %ah |
| shlb $4, %al |
| movw %ax, %cx |
| movb %bh, %al |
| shrb $4, %al |
| addw %ax, %cx |
| shlw $8, %cx |
| addw $6, %cx |
| movw %cx, %ax |
| movw $0x3c4, %dx |
| outw %ax, %dx |
| incw %dx |
| inb %dx, %al |
| andb %al, %al |
| jnz nocirr |
| |
| movb %bh, %al |
| outb %al, %dx |
| inb %dx, %al |
| cmpb $0x01, %al |
| je iscirr |
| |
| nocirr: xorw %bp, %bp |
| iscirr: movw $0x3d4, %dx |
| movb %bl, %al |
| xorb %ah, %ah |
| shlw $8, %ax |
| addw $0x0c, %ax |
| outw %ax, %dx |
| ret |
| |
| cirrus1_md: |
| .byte 0x1f, 0x19, 0x84 |
| .byte 0x20, 0x2c, 0x84 |
| .byte 0x22, 0x1e, 0x84 |
| .byte 0x31, 0x25, 0x64 |
| .byte 0 |
| .ascii "Cirrus Logic 5X0" |
| .byte 0 |
| |
| # Cirrus Logic 54XX |
| cirrus5_test: |
| movw $0x3c4, %dx |
| movb $6, %al |
| call inidx |
| movb %al, %bl # BL=backup |
| movw $6, %ax |
| call tstidx |
| cmpb $0x0f, %al |
| jne c5fail |
| |
| movw $0x1206, %ax |
| call tstidx |
| cmpb $0x12, %al |
| jne c5fail |
| |
| movb $0x1e, %al |
| call inidx |
| movb %al, %bh |
| movb %bh, %ah |
| andb $0xc0, %ah |
| movb $0x1e, %al |
| call tstidx |
| andb $0x3f, %al |
| jne c5xx |
| |
| movb $0x1e, %al |
| movb %bh, %ah |
| orb $0x3f, %ah |
| call tstidx |
| xorb $0x3f, %al |
| andb $0x3f, %al |
| c5xx: pushf |
| movb $0x1e, %al |
| movb %bh, %ah |
| outw %ax, %dx |
| popf |
| je c5done |
| |
| c5fail: xorw %bp, %bp |
| c5done: movb $6, %al |
| movb %bl, %ah |
| outw %ax, %dx |
| ret |
| |
| cirrus5_md: |
| .byte 0x14, 0x19, 0x84 |
| .byte 0x54, 0x2b, 0x84 |
| .byte 0 |
| .ascii "Cirrus Logic 54XX" |
| .byte 0 |
| |
| # Cirrus Logic 64XX -- no known extra modes, but must be identified, because |
| # it's misidentified by the Ahead test. |
| cirrus6_test: |
| movw $0x3ce, %dx |
| movb $0x0a, %al |
| call inidx |
| movb %al, %bl # BL=backup |
| movw $0xce0a, %ax |
| call tstidx |
| orb %al, %al |
| jne c2fail |
| |
| movw $0xec0a, %ax |
| call tstidx |
| cmpb $0x01, %al |
| jne c2fail |
| |
| movb $0xaa, %al |
| call inidx # 4X, 5X, 7X and 8X are valid 64XX chip ID's. |
| shrb $4, %al |
| subb $4, %al |
| jz c6done |
| |
| decb %al |
| jz c6done |
| |
| subb $2, %al |
| jz c6done |
| |
| decb %al |
| jz c6done |
| |
| c2fail: xorw %bp, %bp |
| c6done: movb $0x0a, %al |
| movb %bl, %ah |
| outw %ax, %dx |
| ret |
| |
| cirrus6_md: |
| .byte 0 |
| .ascii "Cirrus Logic 64XX" |
| .byte 0 |
| |
| # Everex / Trident |
| everex_test: |
| movw $0x7000, %ax |
| xorw %bx, %bx |
| int $0x10 |
| cmpb $0x70, %al |
| jne noevrx |
| |
| shrw $4, %dx |
| cmpw $0x678, %dx |
| je evtrid |
| |
| cmpw $0x236, %dx |
| jne evrxok |
| |
| evtrid: leaw trident_md, %bp |
| evrxok: ret |
| |
| noevrx: xorw %bp, %bp |
| ret |
| |
| everex_md: |
| .byte 0x03, 0x22, 0x50 |
| .byte 0x04, 0x3c, 0x50 |
| .byte 0x07, 0x2b, 0x64 |
| .byte 0x08, 0x4b, 0x64 |
| .byte 0x0a, 0x19, 0x84 |
| .byte 0x0b, 0x2c, 0x84 |
| .byte 0x16, 0x1e, 0x50 |
| .byte 0x18, 0x1b, 0x64 |
| .byte 0x21, 0x40, 0xa0 |
| .byte 0x40, 0x1e, 0x84 |
| .byte 0 |
| .ascii "Everex/Trident" |
| .byte 0 |
| |
| # Genoa. |
| genoa_test: |
| leaw idgenoa, %si # Check Genoa 'clues' |
| xorw %ax, %ax |
| movb %es:(0x37), %al |
| movw %ax, %di |
| movw $0x04, %cx |
| decw %si |
| decw %di |
| l1: incw %si |
| incw %di |
| movb (%si), %al |
| testb %al, %al |
| jz l2 |
| |
| cmpb %es:(%di), %al |
| l2: loope l1 |
| orw %cx, %cx |
| je isgen |
| |
| xorw %bp, %bp |
| isgen: ret |
| |
| idgenoa: .byte 0x77, 0x00, 0x99, 0x66 |
| |
| genoa_md: |
| .byte 0x58, 0x20, 0x50 |
| .byte 0x5a, 0x2a, 0x64 |
| .byte 0x60, 0x19, 0x84 |
| .byte 0x61, 0x1d, 0x84 |
| .byte 0x62, 0x20, 0x84 |
| .byte 0x63, 0x2c, 0x84 |
| .byte 0x64, 0x3c, 0x84 |
| .byte 0x6b, 0x4f, 0x64 |
| .byte 0x72, 0x3c, 0x50 |
| .byte 0x74, 0x42, 0x50 |
| .byte 0x78, 0x4b, 0x64 |
| .byte 0 |
| .ascii "Genoa" |
| .byte 0 |
| |
| # OAK |
| oak_test: |
| leaw idoakvga, %si |
| movw $0x08, %di |
| movw $0x08, %cx |
| repe |
| cmpsb |
| je isoak |
| |
| xorw %bp, %bp |
| isoak: ret |
| |
| idoakvga: .ascii "OAK VGA " |
| |
| oak_md: .byte 0x4e, 0x3c, 0x50 |
| .byte 0x4f, 0x3c, 0x84 |
| .byte 0x50, 0x19, 0x84 |
| .byte 0x51, 0x2b, 0x84 |
| .byte 0 |
| .ascii "OAK" |
| .byte 0 |
| |
| # WD Paradise. |
| paradise_test: |
| leaw idparadise, %si |
| movw $0x7d, %di |
| movw $0x04, %cx |
| repe |
| cmpsb |
| je ispara |
| |
| xorw %bp, %bp |
| ispara: ret |
| |
| idparadise: .ascii "VGA=" |
| |
| paradise_md: |
| .byte 0x41, 0x22, 0x50 |
| .byte 0x47, 0x1c, 0x84 |
| .byte 0x55, 0x19, 0x84 |
| .byte 0x54, 0x2c, 0x84 |
| .byte 0 |
| .ascii "Paradise" |
| .byte 0 |
| |
| # Trident. |
| trident_test: |
| movw $0x3c4, %dx |
| movb $0x0e, %al |
| outb %al, %dx |
| incw %dx |
| inb %dx, %al |
| xchgb %al, %ah |
| xorb %al, %al |
| outb %al, %dx |
| inb %dx, %al |
| xchgb %ah, %al |
| movb %al, %bl # Strange thing ... in the book this wasn't |
| andb $0x02, %bl # necessary but it worked on my card which |
| jz setb2 # is a trident. Without it the screen goes |
| # blurred ... |
| andb $0xfd, %al |
| jmp clrb2 |
| |
| setb2: orb $0x02, %al |
| clrb2: outb %al, %dx |
| andb $0x0f, %ah |
| cmpb $0x02, %ah |
| je istrid |
| |
| xorw %bp, %bp |
| istrid: ret |
| |
| trident_md: |
| .byte 0x50, 0x1e, 0x50 |
| .byte 0x51, 0x2b, 0x50 |
| .byte 0x52, 0x3c, 0x50 |
| .byte 0x57, 0x19, 0x84 |
| .byte 0x58, 0x1e, 0x84 |
| .byte 0x59, 0x2b, 0x84 |
| .byte 0x5a, 0x3c, 0x84 |
| .byte 0 |
| .ascii "Trident" |
| .byte 0 |
| |
| # Tseng. |
| tseng_test: |
| movw $0x3cd, %dx |
| inb %dx, %al # Could things be this simple ! :-) |
| movb %al, %bl |
| movb $0x55, %al |
| outb %al, %dx |
| inb %dx, %al |
| movb %al, %ah |
| movb %bl, %al |
| outb %al, %dx |
| cmpb $0x55, %ah |
| je istsen |
| |
| isnot: xorw %bp, %bp |
| istsen: ret |
| |
| tseng_md: |
| .byte 0x26, 0x3c, 0x50 |
| .byte 0x2a, 0x28, 0x64 |
| .byte 0x23, 0x19, 0x84 |
| .byte 0x24, 0x1c, 0x84 |
| .byte 0x22, 0x2c, 0x84 |
| .byte 0x21, 0x3c, 0x84 |
| .byte 0 |
| .ascii "Tseng" |
| .byte 0 |
| |
| # Video7. |
| video7_test: |
| movw $0x3cc, %dx |
| inb %dx, %al |
| movw $0x3b4, %dx |
| andb $0x01, %al |
| jz even7 |
| |
| movw $0x3d4, %dx |
| even7: movb $0x0c, %al |
| outb %al, %dx |
| incw %dx |
| inb %dx, %al |
| movb %al, %bl |
| movb $0x55, %al |
| outb %al, %dx |
| inb %dx, %al |
| decw %dx |
| movb $0x1f, %al |
| outb %al, %dx |
| incw %dx |
| inb %dx, %al |
| movb %al, %bh |
| decw %dx |
| movb $0x0c, %al |
| outb %al, %dx |
| incw %dx |
| movb %bl, %al |
| outb %al, %dx |
| movb $0x55, %al |
| xorb $0xea, %al |
| cmpb %bh, %al |
| jne isnot |
| |
| movb $VIDEO_FIRST_V7>>8, svga_prefix # Use special mode switching |
| ret |
| |
| video7_md: |
| .byte 0x40, 0x2b, 0x50 |
| .byte 0x43, 0x3c, 0x50 |
| .byte 0x44, 0x3c, 0x64 |
| .byte 0x41, 0x19, 0x84 |
| .byte 0x42, 0x2c, 0x84 |
| .byte 0x45, 0x1c, 0x84 |
| .byte 0 |
| .ascii "Video 7" |
| .byte 0 |
| |
| # Realtek VGA |
| realtek_test: |
| leaw idrtvga, %si |
| movw $0x45, %di |
| movw $0x0b, %cx |
| repe |
| cmpsb |
| je isrt |
| |
| xorw %bp, %bp |
| isrt: ret |
| |
| idrtvga: .ascii "REALTEK VGA" |
| |
| realtek_md: |
| .byte 0x1a, 0x3c, 0x50 |
| .byte 0x1b, 0x19, 0x84 |
| .byte 0x1c, 0x1e, 0x84 |
| .byte 0x1d, 0x2b, 0x84 |
| .byte 0x1e, 0x3c, 0x84 |
| .byte 0 |
| .ascii "REALTEK" |
| .byte 0 |
| |
| #endif /* CONFIG_VIDEO_SVGA */ |
| |
| # User-defined local mode table (VGA only) |
| #ifdef CONFIG_VIDEO_LOCAL |
| local_modes: |
| leaw local_mode_table, %si |
| locm1: lodsw |
| orw %ax, %ax |
| jz locm2 |
| |
| stosw |
| movsw |
| jmp locm1 |
| |
| locm2: ret |
| |
| # This is the table of local video modes which can be supplied manually |
| # by the user. Each entry consists of mode ID (word) and dimensions |
| # (byte for column count and another byte for row count). These modes |
| # are placed before all SVGA and VESA modes and override them if table |
| # compacting is enabled. The table must end with a zero word followed |
| # by NUL-terminated video adapter name. |
| local_mode_table: |
| .word 0x0100 # Example: 40x25 |
| .byte 25,40 |
| .word 0 |
| .ascii "Local" |
| .byte 0 |
| #endif /* CONFIG_VIDEO_LOCAL */ |
| |
| # Read a key and return the ASCII code in al, scan code in ah |
| getkey: xorb %ah, %ah |
| int $0x16 |
| ret |
| |
| # Read a key with a timeout of 30 seconds. |
| # The hardware clock is used to get the time. |
| getkt: call gettime |
| addb $30, %al # Wait 30 seconds |
| cmpb $60, %al |
| jl lminute |
| |
| subb $60, %al |
| lminute: |
| movb %al, %cl |
| again: movb $0x01, %ah |
| int $0x16 |
| jnz getkey # key pressed, so get it |
| |
| call gettime |
| cmpb %cl, %al |
| jne again |
| |
| movb $0x20, %al # timeout, return `space' |
| ret |
| |
| # Flush the keyboard buffer |
| flush: movb $0x01, %ah |
| int $0x16 |
| jz empty |
| |
| xorb %ah, %ah |
| int $0x16 |
| jmp flush |
| |
| empty: ret |
| |
| # Print hexadecimal number. |
| prthw: pushw %ax |
| movb %ah, %al |
| call prthb |
| popw %ax |
| prthb: pushw %ax |
| shrb $4, %al |
| call prthn |
| popw %ax |
| andb $0x0f, %al |
| prthn: cmpb $0x0a, %al |
| jc prth1 |
| |
| addb $0x07, %al |
| prth1: addb $0x30, %al |
| jmp prtchr |
| |
| # Print decimal number in al |
| prtdec: pushw %ax |
| pushw %cx |
| xorb %ah, %ah |
| movb $0x0a, %cl |
| idivb %cl |
| cmpb $0x09, %al |
| jbe lt100 |
| |
| call prtdec |
| jmp skip10 |
| |
| lt100: addb $0x30, %al |
| call prtchr |
| skip10: movb %ah, %al |
| addb $0x30, %al |
| call prtchr |
| popw %cx |
| popw %ax |
| ret |
| |
| store_edid: |
| pushw %es # just save all registers |
| pushw %ax |
| pushw %bx |
| pushw %cx |
| pushw %dx |
| pushw %di |
| |
| pushw %fs |
| popw %es |
| |
| movl $0x13131313, %eax # memset block with 0x13 |
| movw $32, %cx |
| movw $0x140, %di |
| cld |
| rep |
| stosl |
| |
| movw $0x4f15, %ax # do VBE/DDC |
| movw $0x01, %bx |
| movw $0x00, %cx |
| movw $0x00, %dx |
| movw $0x140, %di |
| int $0x10 |
| |
| popw %di # restore all registers |
| popw %dx |
| popw %cx |
| popw %bx |
| popw %ax |
| popw %es |
| ret |
| |
| # VIDEO_SELECT-only variables |
| mt_end: .word 0 # End of video mode table if built |
| edit_buf: .space 6 # Line editor buffer |
| card_name: .word 0 # Pointer to adapter name |
| scanning: .byte 0 # Performing mode scan |
| do_restore: .byte 0 # Screen contents altered during mode change |
| svga_prefix: .byte VIDEO_FIRST_BIOS>>8 # Default prefix for BIOS modes |
| graphic_mode: .byte 0 # Graphic mode with a linear frame buffer |
| dac_size: .byte 6 # DAC bit depth |
| |
| # Status messages |
| keymsg: .ascii "Press <RETURN> to see video modes available, " |
| .ascii "<SPACE> to continue or wait 30 secs" |
| .byte 0x0d, 0x0a, 0 |
| |
| listhdr: .byte 0x0d, 0x0a |
| .ascii "Mode: COLSxROWS:" |
| |
| crlft: .byte 0x0d, 0x0a, 0 |
| |
| prompt: .byte 0x0d, 0x0a |
| .asciz "Enter mode number or `scan': " |
| |
| unknt: .asciz "Unknown mode ID. Try again." |
| |
| badmdt: .ascii "You passed an undefined mode number." |
| .byte 0x0d, 0x0a, 0 |
| |
| vesaer: .ascii "Error: Scanning of VESA modes failed. Please " |
| .ascii "report to <mj@ucw.cz>." |
| .byte 0x0d, 0x0a, 0 |
| |
| old_name: .asciz "CGA/MDA/HGA" |
| |
| ega_name: .asciz "EGA" |
| |
| svga_name: .ascii " " |
| |
| vga_name: .asciz "VGA" |
| |
| vesa_name: .asciz "VESA" |
| |
| name_bann: .asciz "Video adapter: " |
| #endif /* CONFIG_VIDEO_SELECT */ |
| |
| # Other variables: |
| adapter: .byte 0 # Video adapter: 0=CGA/MDA/HGA,1=EGA,2=VGA |
| video_segment: .word 0xb800 # Video memory segment |
| force_size: .word 0 # Use this size instead of the one in BIOS vars |
