diff options
| author | EmulatedSeasons <89668582+EmulatedSeasons@users.noreply.github.com> | 2024-05-03 03:39:47 -0400 |
|---|---|---|
| committer | EmulatedSeasons <89668582+EmulatedSeasons@users.noreply.github.com> | 2024-05-03 03:39:47 -0400 |
| commit | 2d59766eb330b9d15a9bcbcd7e1695809fc099c5 (patch) | |
| tree | b5abb4d0c0c488cbb44c2c0a54d59b44fe1fc462 /kernel/arch/x86/tmtty.cpp | |
| parent | 2461cd921d45e3d75245568bc59831c1f0a43331 (diff) | |
renamed i386 to x86
Diffstat (limited to 'kernel/arch/x86/tmtty.cpp')
| -rw-r--r-- | kernel/arch/x86/tmtty.cpp | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/kernel/arch/x86/tmtty.cpp b/kernel/arch/x86/tmtty.cpp new file mode 100644 index 0000000..d4dc772 --- /dev/null +++ b/kernel/arch/x86/tmtty.cpp @@ -0,0 +1,78 @@ +#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+#include <arch/i386/tmtty.h>
+
+#include "vga.h"
+
+/* Text mode tty */
+
+static const size_t VGA_WIDTH = 80;
+static const size_t VGA_HEIGHT = 25;
+static uint16_t* const VGA_MEMORY = (uint16_t*) 0xB8000;
+
+size_t terminal_row;
+size_t terminal_column;
+uint8_t terminal_color;
+uint16_t* terminal_buffer;
+
+void terminal_clear(void) {
+ terminal_row = 0;
+ terminal_column = 0;
+ for (size_t y = 0; y < VGA_HEIGHT; y++) {
+ for (size_t x = 0; x < VGA_WIDTH; x++) {
+ const size_t i = y * VGA_WIDTH + x;
+ terminal_buffer[i] = vga_entry(' ', terminal_color);
+ }
+ }
+}
+
+void terminal_initialize(void) {
+ terminal_color = vga_entry_color(VGA_COLOR_WHITE, VGA_COLOR_BLACK);
+ terminal_buffer = VGA_MEMORY;
+ terminal_clear();
+}
+
+void terminal_setcolor(uint8_t color) {
+ terminal_color = color;
+}
+
+void terminal_putentryat(char c, uint8_t color, size_t x, size_t y) {
+ const size_t i = y * VGA_WIDTH + x;
+ terminal_buffer[i] = vga_entry(c, color);
+}
+
+void terminal_scroll() {
+ memmove(VGA_MEMORY, (VGA_MEMORY + VGA_WIDTH), (VGA_HEIGHT * VGA_WIDTH) - VGA_WIDTH);
+ memset(VGA_MEMORY + (VGA_WIDTH * VGA_HEIGHT) - VGA_WIDTH, 0x0, VGA_WIDTH * 2);
+ --terminal_row;
+}
+
+void terminal_putchar(char c) {
+ unsigned char uc = c;
+ if (uc == '\n') {
+ terminal_column = 0;
+ if (terminal_row++ == VGA_HEIGHT)
+ terminal_scroll();
+ return;
+ }
+ terminal_putentryat(uc, terminal_color, terminal_column, terminal_row);
+
+ if (++terminal_column == VGA_WIDTH) {
+ terminal_column = 0;
+ if (++terminal_row == VGA_HEIGHT) {
+ terminal_scroll();
+ }
+ }
+}
+
+void terminal_write(const char* data, size_t size) {
+ for (size_t i = 0; i < size; i++) {
+ terminal_putchar(data[i]);
+ }
+}
+
+void terminal_writestring(const char* data) {
+ terminal_write(data, strlen(data));
+}
\ No newline at end of file |