88 lines
1.6 KiB
C
88 lines
1.6 KiB
C
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#include <stdio.h>
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#include "cv.h"
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#include "cvu.h"
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#define PATTERN 0x0000
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#define IMAGE 0x1c00
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#define COLOR 0x2000
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#define COLS 32
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#define ROWS 24
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uintptr_t __at(0x6a) font_bitmap_a;
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uintptr_t __at(0x6c) font_bitmap_0;
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void setup_32_column_font() {
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cv_set_character_pattern_t(PATTERN);
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cv_set_image_table(IMAGE);
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cv_set_color_table(COLOR);
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cv_set_screen_mode(CV_SCREENMODE_STANDARD);
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cvu_memtovmemcpy(PATTERN, (void *)(font_bitmap_0 - '0'*8), 2048);
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cvu_vmemset(COLOR, 0x36, 8); // set color for chars 0-63
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cvu_vmemset(COLOR+8, 0x06, 32-8); // set chars 63-255
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}
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char cursor_x;
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char cursor_y;
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void clrscr() {
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cvu_vmemset(IMAGE, ' ', COLS*ROWS);
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}
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void setup_stdio() {
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cursor_x = 0;
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cursor_y = 0;
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clrscr();
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}
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void scrollup() {
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char buf[COLS];
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char y;
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for (y=0; y<ROWS-1; y++) {
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cvu_vmemtomemcpy(buf, IMAGE + COLS*y + COLS, COLS);
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cvu_memtovmemcpy(IMAGE + COLS*y, buf, COLS);
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}
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cvu_vmemset(IMAGE + COLS*(ROWS-1), ' ', COLS);
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}
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void newline() {
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if (cursor_y >= ROWS-1) {
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scrollup();
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} else {
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cursor_y++;
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}
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}
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int putchar(int ch) {
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switch (ch) {
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case '\n':
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newline(); // TODO: scrolling
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case '\r':
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cursor_x = 0;
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return 0;
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}
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cvu_voutb(ch, IMAGE + COLS*cursor_y + cursor_x);
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cursor_x++;
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if (cursor_x >= COLS) {
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newline();
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cursor_x = 0;
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}
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}
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void main() {
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unsigned char byteval = 123;
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signed char charval = 123;
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short shortval = 12345;
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setup_32_column_font();
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setup_stdio();
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cv_set_screen_active(true);
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printf("HELLO WORLD!\n");
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while (1) {
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printf("char %d byte %u sh %d\n",
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charval++, byteval++, shortval++);
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}
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}
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