src/include/pc80/vga_io.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 #ifndef VGA_IO_H
   4 #define VGA_IO_H
   5
   6 /*
   7  * All IO necessary to poke VGA registers.
   8  */
   9
  10 /* VGA Enable */
  11 unsigned char vga_enable_read(void);
  12 void vga_enable_write(unsigned char value);
  13 void vga_enable_mask(unsigned char value, unsigned char mask);
  14
  15 /* Miscellaneous register */
  16 unsigned char vga_misc_read(void);
  17 void vga_misc_write(unsigned char value);
  18 void vga_misc_mask(unsigned char value, unsigned char mask);
  19
  20 /* Sequencer registers. */
  21 unsigned char vga_sr_read(unsigned char index);
  22 void vga_sr_write(unsigned char index, unsigned char value);
  23 void vga_sr_mask(unsigned char index, unsigned char value, unsigned char mask);
  24
  25 /* CR registers. */
  26 unsigned char vga_cr_read(unsigned char index);
  27 void vga_cr_write(unsigned char index, unsigned char value);
  28 void vga_cr_mask(unsigned char index, unsigned char value, unsigned char mask);
  29
  30 /* Attribute registers. */
  31 unsigned char vga_ar_read(unsigned char index);
  32 void vga_ar_write(unsigned char index, unsigned char value);
  33 void vga_ar_mask(unsigned char index, unsigned char value, unsigned char mask);
  34
  35 /* Graphics registers. */
  36 unsigned char vga_gr_read(unsigned char index);
  37 void vga_gr_write(unsigned char index, unsigned char value);
  38 void vga_gr_mask(unsigned char index, unsigned char value, unsigned char mask);
  39
  40 /* DAC functions. */
  41 void vga_palette_enable(void);
  42 void vga_palette_disable(void);
  43 unsigned char vga_dac_mask_read(void);
  44 void vga_dac_mask_write(unsigned char mask);
  45 void vga_dac_read_address(unsigned char address);
  46 void vga_dac_write_address(unsigned char address);
  47 unsigned char vga_dac_data_read(void);
  48 void vga_dac_data_write(unsigned char data);
  49
  50 #endif /* VGA_IO_H */