47 lines
961 B
C
47 lines
961 B
C
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#ifndef RK_VGA_H_
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#define RK_VGA_H_
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#include <stdint.h>
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/*
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* Location of the linear text buffer
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* Used to directly modify text on screen
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* 80 columns by 25 rows
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*/
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#define VGA_MEMORY_ADDR 0xb8000
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#define VGA_MAX_COLS 80
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#define VGA_MAX_ROWS 25
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#define WHITE_ON_BLACK 0x0f
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#define CRTC_ADDR_PORT 0x3d4
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#define CRTC_DATA_PORT 0x3d5
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#define CRTC_CURSOR_LO_REGISTER 0x0f
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#define CRTC_CURSOR_HI_REGISTER 0x0e
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/**
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* @brief Gets the text-mode cursor's position.
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*
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* @return The position, not offset, of the cursor. Multiply this by two for the offset.
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*/
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uint16_t get_cursor_pos();
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/**
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* @brief Sets the cursor's position in VGA text-mode.
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*
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* @param pos The position, not offset, of the cursor. Multiply by two for the offset.
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*/
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void set_cursor_pos(uint16_t pos);
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/**
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* @brief Clears the screen in VGA text-mode by overwriting every character with a zero, then resets the cursor position.
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*/
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void clear_screen(void);
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void popchar();
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#endif
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