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8bitworkshop/presets/coleco/mode2compressed.c
2019-12-02 22:16:11 -06:00

44 lines
989 B
C

/*
This demo uncompresses the Mode 2 bitmap from a
compressed LZG stream in ROM. This takes several times
longer than just copying it from ROM.
*/
#include <stdlib.h>
#include <cv.h>
#include <cvu.h>
#include "common.h"
/* link in MODE 2 bitmap data */
//#link "lzg.c"
//#link "sailboat-lzg.s"
extern const unsigned char msx_bitmap_lzg[];
void lzg_decode_vram(const char* src, unsigned int dest, unsigned int count);
void setup_mode2() {
cvu_vmemset(0, 0, 0x4000);
cv_set_screen_mode(CV_SCREENMODE_BITMAP); // mode 2
cv_set_image_table(IMAGE);
cv_set_character_pattern_t(PATTERN|0x1fff); // AND mask
cv_set_color_table(COLOR|0x1fff); // AND mask
cv_set_sprite_attribute_table(SPRITES);
}
void main() {
cv_set_screen_active(false);
setup_mode2();
lzg_decode_vram(msx_bitmap_lzg, PATTERN, 0x3800);
cv_set_screen_active(true);
while (1) {
//cv_set_character_pattern_t(PATTERN|rand()); // AND mask
//cv_set_color_table(COLOR|rand()); // AND mask
}
}