#include "common.h"
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#include "common.h"
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#include "support.h"
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#include "support.h"
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#include "screen.h"
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#include "screen.h"
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#if CRT_ENABLED
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#if CRT_ENABLED
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unsigned long fg_color = COLOR_WHITE;
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unsigned long fg_color = COLOR_WHITE;
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unsigned long bg_color = COLOR_BLACK;
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unsigned long bg_color = COLOR_BLACK;
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int cx = 0;
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int cx = 0;
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int cy = 0;
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int cy = 0;
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extern unsigned char font[256][12];
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extern unsigned char font[256][12];
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static char screen[CHARSY][CHARSX];
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static char screen[CHARSY][CHARSX];
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void put_char_xy (int x, int y, char c) {
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void put_char_xy(int x, int y, char c)
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{
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int i, j;
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int i, j;
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screen[y][x] = c;
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screen[y][x] = c;
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x *= CHAR_WIDTH;
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x *= CHAR_WIDTH;
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y *= CHAR_HEIGHT;
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y *= CHAR_HEIGHT;
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for (i = 0; i < CHAR_HEIGHT; i++) {
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for (i = 0; i < CHAR_HEIGHT; i++) {
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int t = font[(unsigned char)c][i];
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int t = font[(unsigned char)c][i];
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for (j = 0; j < CHAR_WIDTH; j++) {
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for (j = 0; j < CHAR_WIDTH; j++) {
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PUT_PIXEL(x + j, y + i, (t & 1) ? fg_color : bg_color);
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PUT_PIXEL(x + j, y + i, (t & 1) ? fg_color : bg_color);
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t >>= 1;
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t >>= 1;
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}
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}
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}
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}
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}
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}
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static void scroll (void) {
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static void scroll(void)
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{
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int x,y;
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int x,y;
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#if 1
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#if 1
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for (y = 1; y < CHARSY; y++)
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for (y = 1; y < CHARSY; y++)
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for (x = 0; x < CHARSX; x++)
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for (x = 0; x < CHARSX; x++)
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put_char_xy (x, y-1, screen[y][x]);
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put_char_xy(x, y - 1, screen[y][x]);
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#else
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#else
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memcpy ( (unsigned char *)FB_BASE_ADDR, ((unsigned char *)FB_BASE_ADDR) + RESX * CHAR_HEIGHT, (RESY - CHAR_HEIGHT) * RESX);
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memcpy((unsigned char *)FB_BASE_ADDR,
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((unsigned char *)FB_BASE_ADDR) + RESX * CHAR_HEIGHT,
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(RESY - CHAR_HEIGHT) * RESX);
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memcpy (&screen[0][0], &screen[1][0], (CHARSY - 1) * CHARSX);
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memcpy (&screen[0][0], &screen[1][0], (CHARSY - 1) * CHARSX);
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#endif
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#endif
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for (x = 0; x < CHARSX; x++)
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for (x = 0; x < CHARSX; x++)
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put_char_xy (x, CHARSY-1, ' ');
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put_char_xy(x, CHARSY - 1, ' ');
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cy--;
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cy--;
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}
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}
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void screen_putc (char c) {
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void screen_putc(char c)
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{
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int t;
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int t;
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switch (c) {
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switch (c) {
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case '\n':
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case '\n':
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cy++;
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cy++;
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cx = 0;
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cx = 0;
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if (cy >= CHARSY)
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if (cy >= CHARSY)
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scroll();
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scroll();
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break;
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break;
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case '\r':
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case '\r':
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cx = 0;
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cx = 0;
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break;
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break;
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case '\t':
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case '\t':
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for (t = 0; t < 8 - (cx & 7); t++)
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for (t = 0; t < 8 - (cx & 7); t++)
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screen_putc (' ');
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screen_putc(' ');
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break;
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break;
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case '\b':
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case '\b':
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if (cx > 0) cx--;
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if (cx > 0)
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cx--;
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put_char_xy(cx, cy, ' ');
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put_char_xy(cx, cy, ' ');
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break;
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break;
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default:
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default:
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put_char_xy(cx, cy, c);
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put_char_xy(cx, cy, c);
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cx++;
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cx++;
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if(cx >= CHARSX) screen_putc ('\n');
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if (cx >= CHARSX)
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screen_putc('\n');
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break;
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break;
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}
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}
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}
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}
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void screen_clear () {
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void screen_clear()
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{
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memset ((unsigned char *)FB_BASE_ADDR, bg_color, RESX * RESY);
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memset ((unsigned char *)FB_BASE_ADDR, bg_color, RESX * RESY);
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memset (&screen[0][0], ' ', CHARSX * CHARSY);
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memset(&screen[0][0], ' ', CHARSX * CHARSY);
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cx = cy = 0;
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cx = cy = 0;
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}
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}
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void screen_puts (char *s) {
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void screen_puts(char *s)
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{
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while (*s) {
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while (*s) {
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screen_putc (*s);
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screen_putc(*s);
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s++;
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s++;
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}
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}
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}
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}
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void screen_init () {
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void screen_init()
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{
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screen_clear ();
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screen_clear ();
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SET_PALLETE(COLOR_BLACK, 0, 0, 0);
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SET_PALLETE(COLOR_BLACK, 0, 0, 0);
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SET_PALLETE(COLOR_WHITE, 127, 127, 127);
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SET_PALLETE(COLOR_WHITE, 127, 127, 127);
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/* Set screen offset */
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/* Set screen offset */
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*((unsigned long *)CRT_BUFFER_REG) = FB_BASE_ADDR;
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*((unsigned long *)CRT_BUFFER_REG) = FB_BASE_ADDR;
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/* Turn screen on */
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/* Turn screen on */
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*((unsigned long *)CRT_REG) = 0x00000001;
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*((unsigned long *)CRT_REG) = 0x00000001;
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}
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}
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#endif /* CRT_ENABLED */
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#endif /* CRT_ENABLED */
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