98 lines
2.0 KiB
C
98 lines
2.0 KiB
C
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#include <stdlib.h>
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#include <string.h>
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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 ((const cv_vmemp)0x0)
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#define COLOR ((const cv_vmemp)0x2000)
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#define IMAGE ((const cv_vmemp)0x1800)
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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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cvu_vmemset(0, 0, 0x4000);
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cv_set_image_table(IMAGE);
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cvu_memtovmemcpy(PATTERN, (void *)(font_bitmap_0 - '0'*8), 0x800);
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cvu_memtovmemcpy(PATTERN+0x800, (void *)(font_bitmap_0 - '0'*2), 0x800);
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cvu_memtovmemcpy(PATTERN+0x1000, (void *)(font_bitmap_0 - '0'*0), 0x800);
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cv_set_character_pattern_t(PATTERN|0x1fff); // AND mask
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cv_set_screen_mode(CV_SCREENMODE_BITMAP); // mode 2
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cv_set_color_table(0x2000|0x1fff); // AND mask
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{
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int i;
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for (i=0; i<0x800; i++)
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cvu_voutb((i&15)|0x2, COLOR+i);
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for (i=0x800; i<0x1000; i++)
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cvu_voutb(((i&15)|0x2)<<4, COLOR+i);
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}
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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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