mirror of
https://github.com/reactos/reactos.git
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729 lines
20 KiB
NASM
729 lines
20 KiB
NASM
;/*++
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;
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;Copyright (c) 1998-2001 Klaus P. Gerlicher
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;
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;Module Name:
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;
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; vga_utils.asm
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;
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;Abstract:
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;
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; assembler function for directly programming standard VGA
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;
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;Environment:
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;
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; LINUX 2.2.X
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; Kernel mode only
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;
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;Author:
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;
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; Klaus P. Gerlicher
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; Reactos Port by Eugene Ingerman
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;
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;Revision History:
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;
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; 30-Oct-2001: created
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;
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;Copyright notice:
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;
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; This file may be distributed under the terms of the GNU Public License.
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;
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;--*/
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global _pice_save_current_registers
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global _pice_restore_current_registers
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global _pice_set_mode_3_80x50
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global _pice_set_mode_3_80x25
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;****************************************************************************
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;* some assign's ************************************************************
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;****************************************************************************
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%assign VGA_CRT_REGISTERS 24
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%assign VGA_ATTRIBUTE_REGISTERS 21
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%assign VGA_GRAPHIC_REGISTERS 9
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%assign VGA_SEQUENCER_REGISTERS 5
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%assign VGA_MISC_REGISTERS 1
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%assign VGA_IO_BASE 03c0h
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%assign VGA_IO_SIZE 020h
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%assign VGA_ATTRIBUTE_INDEX 03c0h
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%assign VGA_ATTRIBUTE_DATA_WRITE 03c0h
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%assign VGA_ATTRIBUTE_DATA_READ 03c1h
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%assign VGA_MISC_DATA_WRITE 03c2h
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%assign VGA_SEQUENCER_INDEX 03c4h
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%assign VGA_SEQUENCER_DATA 03c5h
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%assign VGA_PEL_MASK 03c6h
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%assign VGA_PEL_INDEX_READ 03c7h
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%assign VGA_PEL_INDEX_WRITE 03c8h
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%assign VGA_PEL_DATA 03c9h
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%assign VGA_MISC_DATA_READ 03cch
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%assign VGA_GRAPHIC_INDEX 03ceh
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%assign VGA_GRAPHIC_DATA 03cfh
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%assign VGA_CRT_INDEX 03d4h
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%assign VGA_CRT_DATA 03d5h
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%assign VGA_INPUT_STATUS 03dah
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section .data
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pice_mode3_80x50_registers:
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; offsets 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18
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.crt: db 0x5f,0x4f,0x50,0x82,0x55,0x80,0xbf,0x1f,0x00,0x67,0x06,0x07,0x00,0x00,0x00,0x00,0x9c,0x8f,0x8f,0x28,0x1f,0x96,0xb9,0xa3,0xff
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.attribute db 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x08,0x00,0x0f,0x00,0x00
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.graphic: db 0x00,0x00,0x00,0x00,0x00,0x10,0x0e,0x00,0xff
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.sequencer: db 0x03,0x00,0x03,0x00,0x02 ; 9 bits per char
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;.sequencer: db 0x03,0x01,0x03,0x00,0x02 ; 8 bits per char
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.misc: db 0x67
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pice_mode3_80x25_registers:
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; offsets 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18
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.crt: db 0x5f,0x4f,0x50,0x82,0x55,0x81,0xbf,0x1f,0x00,0x4f,0x0d,0x0e,0x00,0x00,0x30,0xe8,0x9c,0x0e,0x8f,0x28,0x1f,0x96,0xb9,0xa3
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.attribute db 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,0x0c,0x00,0x0f,0x08,0x00
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.graphic: db 0x00,0x00,0x00,0x00,0x00,0x10,0x0e,0x00,0xff
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.sequencer: db 0x03,0x00,0x03,0x00,0x02
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.misc: db 0x67
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section .bss
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pice_current_registers:
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.crt: resb VGA_CRT_REGISTERS
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.attribute: resb VGA_ATTRIBUTE_REGISTERS
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.graphic: resb VGA_GRAPHIC_REGISTERS
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.sequencer: resb VGA_SEQUENCER_REGISTERS
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.misc: resb VGA_MISC_REGISTERS
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align 4
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.colormap: resd 256
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;****************************************************************************
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;* pice_save_current_charset ************************************************
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;****************************************************************************
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section .text
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pice_address dd 0xc00a0000
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pice_save_current_charset:
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xor dword ebx, ebx
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call pice_select_read_plane
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mov dword ecx, 04000h
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mov dword esi, [pice_address]
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mov dword edi, pice_charset_saved
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cld
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rep movsd
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mov dword ebx, 00100h
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call pice_select_read_plane
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mov dword ecx, 04000h
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mov dword esi, [pice_address]
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mov dword edi, (pice_charset_saved + 010000h)
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cld
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rep movsd
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mov dword ebx, 00200h
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call pice_select_read_plane
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mov dword ecx, 04000h
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mov dword esi, [pice_address]
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mov dword edi, (pice_charset_saved + 020000h)
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cld
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rep movsd
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mov dword ebx, 00300h
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call pice_select_read_plane
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mov dword ecx, 04000h
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mov dword esi, [pice_address]
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mov dword edi, (pice_charset_saved + 030000h)
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cld
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rep movsd
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.end: ret
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;****************************************************************************
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;* pice_restore_current_charset ****************************************************
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;****************************************************************************
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section .text
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pice_restore_current_charset:
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mov dword ebx, 00100h
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call pice_select_write_plane
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mov dword ecx, 04000h
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mov dword esi, pice_charset_saved
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mov dword edi, [pice_address]
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cld
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rep movsd
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mov dword ebx, 00200h
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call pice_select_write_plane
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mov dword ecx, 04000h
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mov dword esi, (pice_charset_saved + 010000h)
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mov dword edi, [pice_address]
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cld
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rep movsd
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mov dword ebx, 00400h
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call pice_select_write_plane
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mov dword ecx, 04000h
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mov dword esi, (pice_charset_saved + 020000h)
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mov dword edi, [pice_address]
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cld
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rep movsd
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mov dword ebx, 00800h
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call pice_select_write_plane
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mov dword ecx, 04000h
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mov dword esi, (pice_charset_saved + 030000h)
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mov dword edi, [pice_address]
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cld
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rep movsd
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.end: ret
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;****************************************************************************
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;* pice_get_crt_registers **************************************************
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;****************************************************************************
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;* ebx=> pointer where to store crt registers
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;****************************************************************************
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section .text
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pice_get_crt_registers:
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xor dword ecx, ecx
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.loop: mov dword edx, VGA_CRT_INDEX
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mov byte al, cl
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out word dx, al
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mov dword edx, VGA_CRT_DATA
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in byte al, dx
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mov byte [ebx + ecx], al
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inc dword ecx
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cmp dword ecx, VGA_CRT_REGISTERS
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jb .loop
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ret
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;****************************************************************************
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;* pice_get_attribute_registers ********************************************
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;****************************************************************************
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;* ebx=> pointer where to store attribute registers
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;****************************************************************************
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section .text
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pice_get_attribute_registers:
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xor dword ecx, ecx
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.loop: mov dword edx, VGA_INPUT_STATUS
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in byte al, dx
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mov dword edx, VGA_ATTRIBUTE_INDEX
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mov byte al, cl
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out word dx, al
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mov dword edx, VGA_ATTRIBUTE_DATA_READ
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in byte al, dx
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mov byte [ebx + ecx], al
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inc dword ecx
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cmp dword ecx, VGA_ATTRIBUTE_REGISTERS
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jb .loop
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ret
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;****************************************************************************
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;* pice_get_graphic_registers **********************************************
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;****************************************************************************
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;* ebx=> pointer where to store graphics registers
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;****************************************************************************
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section .text
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pice_get_graphic_registers:
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xor dword ecx, ecx
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.loop: mov dword edx, VGA_GRAPHIC_INDEX
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mov byte al, cl
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out word dx, al
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mov dword edx, VGA_GRAPHIC_DATA
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in byte al, dx
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mov byte [ebx + ecx], al
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inc dword ecx
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cmp dword ecx, VGA_GRAPHIC_REGISTERS
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jb .loop
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ret
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;****************************************************************************
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;* pice_get_sequencer_registers ********************************************
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;****************************************************************************
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;* ebx=> pointer where to store sequencer registers
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;****************************************************************************
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section .text
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pice_get_sequencer_registers:
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xor dword ecx, ecx
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.loop: mov dword edx, VGA_SEQUENCER_INDEX
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mov byte al, cl
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out word dx, al
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mov dword edx, VGA_SEQUENCER_DATA
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in byte al, dx
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mov byte [ebx + ecx], al
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inc dword ecx
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cmp dword ecx, VGA_SEQUENCER_REGISTERS
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jb .loop
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ret
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;****************************************************************************
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;* pice_get_misc_registers *************************************************
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;****************************************************************************
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;* ebx=> pointer where to store misc register
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;****************************************************************************
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section .text
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pice_get_misc_registers:
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mov dword edx, VGA_MISC_DATA_READ
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in byte al, dx
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mov byte [ebx], al
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ret
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;****************************************************************************
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;* pice_get_colormap *******************************************************
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;****************************************************************************
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;* ebx=> pointer where to store colormap
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;****************************************************************************
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section .text
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pice_get_colormap:
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xor dword ecx, ecx
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xor dword eax, eax
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mov dword edx, VGA_PEL_INDEX_READ
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out word dx, al
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mov dword edx, VGA_PEL_DATA
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.loop: in byte al, dx
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shl dword eax, 8
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in byte al, dx
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shl dword eax, 8
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in byte al, dx
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mov dword [ebx + 4 * ecx], eax
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inc dword ecx
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test byte cl, cl
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jnz .loop
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ret
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;****************************************************************************
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;* pice_set_crt_registers **************************************************
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;****************************************************************************
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;* ebx=> pointer to stored crt registers
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;****************************************************************************
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section .text
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pice_set_crt_registers:
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;deprotect CRT registers 0 - 7
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mov dword edx, VGA_CRT_INDEX
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mov byte al, 011h
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out word dx, al
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mov dword edx, VGA_CRT_DATA
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in byte al, dx
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and byte al, 07fh
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out word dx, al
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;write to the registers
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xor dword ecx, ecx
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.loop: mov dword edx, VGA_CRT_INDEX
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mov byte al, cl
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out word dx, al
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mov dword edx, VGA_CRT_DATA
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mov byte al, [ebx + ecx]
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out word dx, al
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inc dword ecx
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cmp dword ecx, VGA_CRT_REGISTERS
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jb .loop
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ret
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;****************************************************************************
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;* pice_set_attribute_registers ********************************************
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;****************************************************************************
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;* ebx=> pointer to stored attibute registers
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;****************************************************************************
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section .text
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pice_set_attribute_registers:
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xor dword ecx, ecx
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.loop: mov dword edx, VGA_INPUT_STATUS
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in byte al, dx
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mov dword edx, VGA_ATTRIBUTE_INDEX
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mov byte al, cl
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out word dx, al
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mov dword edx, VGA_ATTRIBUTE_DATA_WRITE
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mov byte al, [ebx + ecx]
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out word dx, al
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inc dword ecx
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cmp dword ecx, VGA_ATTRIBUTE_REGISTERS
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jb .loop
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ret
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;****************************************************************************
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;* pice_set_graphic_registers **********************************************
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;****************************************************************************
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;* ebx=> pointer to stored graphic registers
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;****************************************************************************
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section .text
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pice_set_graphic_registers:
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xor dword ecx, ecx
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.loop: mov dword edx, VGA_GRAPHIC_INDEX
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mov byte al, cl
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out word dx, al
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mov dword edx, VGA_GRAPHIC_DATA
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mov byte al, [ebx + ecx]
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out word dx, al
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inc dword ecx
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cmp dword ecx, VGA_GRAPHIC_REGISTERS
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jb .loop
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ret
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;****************************************************************************
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;* pice_set_sequencer_registers ********************************************
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;****************************************************************************
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;* ebx=> pointer to stored sequencer registers
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;****************************************************************************
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section .text
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pice_set_sequencer_registers:
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;synchronous reset on
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mov dword edx, VGA_SEQUENCER_INDEX
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xor dword eax, eax
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out word dx, al
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mov dword edx, VGA_SEQUENCER_DATA
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inc dword eax
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out word dx, al
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;write to the registers
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mov dword edx, VGA_SEQUENCER_INDEX
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out word dx, al
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mov dword edx, VGA_SEQUENCER_DATA
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mov byte al, [ebx + 1]
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or byte al, 020h
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out word dx, al
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mov dword ecx, 2
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.loop: mov dword edx, VGA_SEQUENCER_INDEX
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mov byte al, cl
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out word dx, al
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mov dword edx, VGA_SEQUENCER_DATA
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mov byte al, [ebx + ecx]
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out word dx, al
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inc dword ecx
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cmp dword ecx, VGA_SEQUENCER_REGISTERS
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jb .loop
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;synchronous reset off
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mov dword edx, VGA_SEQUENCER_INDEX
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xor dword eax, eax
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out word dx, al
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mov dword edx, VGA_SEQUENCER_DATA
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mov byte al, 3
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out word dx, al
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ret
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;****************************************************************************
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;* pice_set_misc_registers *************************************************
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;****************************************************************************
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;* ebx=> pointer to stored misc register
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;****************************************************************************
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section .text
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pice_set_misc_registers:
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mov dword edx, VGA_MISC_DATA_WRITE
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mov byte al, [ebx]
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out word dx, al
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ret
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;****************************************************************************
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;* pice_set_colormap *******************************************************
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;****************************************************************************
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;* ebx=> pointer to stored colormap
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;****************************************************************************
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section .text
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pice_set_colormap:
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xor dword ecx, ecx
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xor dword eax, eax
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mov dword edx, VGA_PEL_INDEX_WRITE
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out word dx, al
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mov dword edx, VGA_PEL_DATA
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.loop: mov dword eax, [ebx + 4 * ecx]
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rol dword eax, 16
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out word dx, al
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rol dword eax, 8
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out word dx, al
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rol dword eax, 8
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out word dx, al
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inc dword ecx
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test byte cl, cl
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jnz .loop
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ret
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;****************************************************************************
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;* pice_screen_on **********************************************************
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;****************************************************************************
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section .text
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pice_screen_on:
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;turn on the screen
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mov dword edx, VGA_SEQUENCER_INDEX
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mov byte al, 1
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out word dx, al
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mov dword edx, VGA_SEQUENCER_DATA
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in byte al, dx
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and byte al, 0dfh
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out word dx, al
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;enable video output
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mov dword edx, VGA_INPUT_STATUS
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in byte al, dx
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mov dword edx, VGA_ATTRIBUTE_DATA_WRITE
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mov byte al, 020h
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out word dx, al
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ret
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;****************************************************************************
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;* pice_select_write_plane *************************************************
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;****************************************************************************
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;* bl==> write mode
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;* bh==> write plane
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;****************************************************************************
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section .text
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pice_select_write_plane:
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and dword ebx, 00f03h
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;enable set/reset = 0
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mov dword edx, VGA_GRAPHIC_INDEX
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mov byte al, 1
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out word dx, al
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mov dword edx, VGA_GRAPHIC_DATA
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xor dword eax, eax
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out word dx, al
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;logical operation = none, rotate = 0
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mov dword edx, VGA_GRAPHIC_INDEX
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mov byte al, 3
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out word dx, al
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mov dword edx, VGA_GRAPHIC_DATA
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xor dword eax, eax
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out word dx, al
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;select write mode
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mov dword edx, VGA_GRAPHIC_INDEX
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mov byte al, 5
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out word dx, al
|
|
mov dword edx, VGA_GRAPHIC_DATA
|
|
in byte al, dx
|
|
and byte al, 0fch
|
|
or byte al, bl
|
|
out word dx, al
|
|
|
|
;bitmask = 0ffh
|
|
|
|
mov dword edx, VGA_GRAPHIC_INDEX
|
|
mov byte al, 8
|
|
out word dx, al
|
|
mov dword edx, VGA_GRAPHIC_DATA
|
|
mov byte al, 0ffh
|
|
out word dx, al
|
|
|
|
;select write plane
|
|
|
|
mov dword edx, VGA_SEQUENCER_INDEX
|
|
mov byte al, 2
|
|
out word dx, al
|
|
mov dword edx, VGA_SEQUENCER_DATA
|
|
mov byte al, bh
|
|
out word dx, al
|
|
ret
|
|
|
|
|
|
|
|
;****************************************************************************
|
|
;* pice_select_read_plane **************************************************
|
|
;****************************************************************************
|
|
;* bl==> read mode
|
|
;* bh==> read plane
|
|
;****************************************************************************
|
|
section .text
|
|
pice_select_read_plane:
|
|
and dword ebx, 00301h
|
|
shl byte bl, 3
|
|
|
|
;select read mode
|
|
|
|
mov dword edx, VGA_GRAPHIC_INDEX
|
|
mov byte al, 5
|
|
out word dx, al
|
|
mov dword edx, VGA_GRAPHIC_DATA
|
|
in byte al, dx
|
|
and byte al, 0f7h
|
|
or byte al, bl
|
|
out word dx, al
|
|
|
|
;select read plane
|
|
|
|
mov dword edx, VGA_GRAPHIC_INDEX
|
|
mov byte al, 4
|
|
out word dx, al
|
|
mov dword edx, VGA_GRAPHIC_DATA
|
|
mov byte al, bh
|
|
out word dx, al
|
|
ret
|
|
|
|
|
|
|
|
;****************************************************************************
|
|
;* pice_save_current_registers **********************************************
|
|
;****************************************************************************
|
|
section .text
|
|
_pice_save_current_registers:
|
|
push esi
|
|
push edi
|
|
push ebx
|
|
|
|
; call pice_save_current_charset
|
|
|
|
.crt: mov dword ebx, pice_current_registers.crt
|
|
call pice_get_crt_registers
|
|
|
|
.attribute: mov dword ebx, pice_current_registers.attribute
|
|
call pice_get_attribute_registers
|
|
|
|
.graphic: mov dword ebx, pice_current_registers.graphic
|
|
call pice_get_graphic_registers
|
|
|
|
.sequencer: mov dword ebx, pice_current_registers.sequencer
|
|
call pice_get_sequencer_registers
|
|
|
|
.misc: mov dword ebx, pice_current_registers.misc
|
|
call pice_get_misc_registers
|
|
|
|
.colormap: mov dword ebx, pice_current_registers.colormap
|
|
call pice_get_colormap
|
|
|
|
pop ebx
|
|
pop edi
|
|
pop esi
|
|
.end: ret
|
|
|
|
;****************************************************************************
|
|
;* pice_restore_current_registers *******************************************
|
|
;****************************************************************************
|
|
section .text
|
|
_pice_restore_current_registers:
|
|
push esi
|
|
push edi
|
|
push ebx
|
|
|
|
; call pice_restore_current_charset
|
|
|
|
.misc: mov dword ebx, pice_current_registers.misc
|
|
call pice_set_misc_registers
|
|
|
|
.crt: mov dword ebx, pice_current_registers.crt
|
|
call pice_set_crt_registers
|
|
|
|
.attribute: mov dword ebx, pice_current_registers.attribute
|
|
call pice_set_attribute_registers
|
|
|
|
.graphic: mov dword ebx, pice_current_registers.graphic
|
|
call pice_set_graphic_registers
|
|
|
|
.sequencer: mov dword ebx, pice_current_registers.sequencer
|
|
call pice_set_sequencer_registers
|
|
|
|
.screen_on: call pice_screen_on
|
|
|
|
.colormap: mov dword ebx, pice_current_registers.colormap
|
|
call pice_set_colormap
|
|
|
|
pop ebx
|
|
pop edi
|
|
pop esi
|
|
|
|
.end: ret
|
|
|
|
|
|
;****************************************************************************
|
|
;* pice_set_mode_3_80x50*****************************************************
|
|
;****************************************************************************
|
|
section .text
|
|
_pice_set_mode_3_80x50:
|
|
push esi
|
|
push edi
|
|
push ebx
|
|
|
|
.crt: mov dword ebx, pice_mode3_80x50_registers.crt
|
|
call pice_set_crt_registers
|
|
|
|
.attribute: mov dword ebx, pice_mode3_80x50_registers.attribute
|
|
call pice_set_attribute_registers
|
|
|
|
.graphic: mov dword ebx, pice_mode3_80x50_registers.graphic
|
|
call pice_set_graphic_registers
|
|
|
|
.sequencer: mov dword ebx, pice_mode3_80x50_registers.sequencer
|
|
call pice_set_sequencer_registers
|
|
|
|
.misc: mov dword ebx, pice_mode3_80x50_registers.misc
|
|
call pice_set_misc_registers
|
|
|
|
.screen_on: call pice_screen_on
|
|
|
|
;.colormap: mov dword ebx, pice_current_registers.colormap
|
|
; call pice_set_colormap
|
|
|
|
pop ebx
|
|
pop edi
|
|
pop esi
|
|
|
|
.end: ret
|
|
|
|
;****************************************************************************
|
|
;* pice_set_mode_3_80x25*****************************************************
|
|
;****************************************************************************
|
|
section .text
|
|
_pice_set_mode_3_80x25:
|
|
push esi
|
|
push edi
|
|
push ebx
|
|
|
|
.crt: mov dword ebx, pice_mode3_80x25_registers.crt
|
|
call pice_set_crt_registers
|
|
|
|
.attribute: mov dword ebx, pice_mode3_80x25_registers.attribute
|
|
call pice_set_attribute_registers
|
|
|
|
.graphic: mov dword ebx, pice_mode3_80x25_registers.graphic
|
|
call pice_set_graphic_registers
|
|
|
|
.sequencer: mov dword ebx, pice_mode3_80x25_registers.sequencer
|
|
call pice_set_sequencer_registers
|
|
|
|
.misc: mov dword ebx, pice_mode3_80x25_registers.misc
|
|
call pice_set_misc_registers
|
|
|
|
.screen_on: call pice_screen_on
|
|
|
|
;.colormap: mov dword ebx, pice_current_registers.colormap
|
|
; call pice_set_colormap
|
|
|
|
pop ebx
|
|
pop edi
|
|
pop esi
|
|
|
|
.end: ret
|
|
|
|
;****************************************************************************
|
|
;* uninitialized data *******************************************************
|
|
;****************************************************************************
|
|
section .bss
|
|
alignb 4
|
|
pice_charset_saved: resb 040000h
|
|
|
|
|