38 lines
1.6 KiB
C
38 lines
1.6 KiB
C
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#ifndef _SYS_VIDEO_H
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#define _SYS_VIDEO_H 1
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/* Definitions used by the console driver. */
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#define MONO_BASE 0xB0000L /* base of mono video memory */
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#define COLOR_BASE 0xB8000L /* base of color video memory */
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#define MONO_SIZE 0x1000 /* 4K mono video memory */
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#define COLOR_SIZE 0x4000 /* 16K color video memory */
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#define EGA_SIZE 0x8000 /* EGA & VGA have at least 32K */
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#define BLANK_COLOR 0x0700 /* determines cursor color on blank screen */
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#define SCROLL_UP 0 /* scroll forward */
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#define SCROLL_DOWN 1 /* scroll backward */
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#define CONS_RAM_WORDS 80 /* video ram buffer size */
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#define MAX_ESC_PARMS 4 /* number of escape sequence params allowed */
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/* Constants relating to the controller chips. */
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#define M_6845 0x3B4 /* port for 6845 mono */
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#define C_6845 0x3D4 /* port for 6845 color */
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#define INDEX 0 /* 6845's index register */
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#define DATA 1 /* 6845's data register */
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#define STATUS 6 /* 6845's status register */
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#define VID_ORG 12 /* 6845's origin register */
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#define CURSOR 14 /* 6845's cursor register */
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/* Beeper. */
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#define BEEP_FREQ 0x0533 /* value to put into timer to set beep freq */
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#define B_TIME 3 /* length of CTRL-G beep is ticks */
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/* definitions used for font management */
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#define GA_SEQUENCER_INDEX 0x3C4
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#define GA_SEQUENCER_DATA 0x3C5
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#define GA_GRAPHICS_INDEX 0x3CE
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#define GA_GRAPHICS_DATA 0x3CF
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#define GA_VIDEO_ADDRESS 0xA0000L
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#define GA_FONT_SIZE 8192
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#endif
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