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tfv: update to make C code more 6502 like

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This commit is contained in:
Vince Weaver
2017-06-24 23:58:26 -04:00
parent 632d18a962
commit dac6337cfd
3 changed files with 45 additions and 39 deletions
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2
gr-sim/gr-sim.c
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@ -739,7 +739,7 @@ int basic_vlin(int y1, int y2, int at) {
else { ram[H2]=y2; ram[V2]=y2; ram[FIRST]=y1; } else { ram[H2]=y2; ram[V2]=y2; ram[FIRST]=y1; }
x=at; x=at;
if (x>48) { if (x>40) {
fprintf(stderr,"Error! AT too large %d!\n",x); fprintf(stderr,"Error! AT too large %d!\n",x);
} }

2
gr-sim/gr-sim.h
View File

@ -1,4 +1,6 @@
extern unsigned char ram[128*1024]; extern unsigned char ram[128*1024];
extern unsigned char a,y,x;
int grsim_input(void); int grsim_input(void);
int grsim_update(void); int grsim_update(void);
int grsim_init(void); int grsim_init(void);

80
gr-sim/tfv.c
View File

@ -61,22 +61,47 @@ static unsigned char ship_left[]={
0x15,0x00,0x07,0x77,0x00, 0x15,0x00,0x07,0x77,0x00,
}; };
static int xx,yy,yadd,match; #define COLOR1 0x00
#define COLOR2 0x01
#define MATCH 0x02
#define XX 0x03
#define YY 0x04
#define YADD 0x05
#define LOOP 0x06
void draw_segment(int color1, int color2) { static void draw_segment(void) {
int i;
for(i=0;i<4;i++) { for(ram[LOOP]=0;ram[LOOP]<4;ram[LOOP]++) {
yy+=yadd; ram[YY]=ram[YY]+ram[YADD];
if (xx==match) color_equals(color1*3); if (ram[XX]==ram[MATCH]) color_equals(ram[COLOR1]*3);
else color_equals(color1); else color_equals(ram[COLOR1]);
basic_vlin(10,yy,9+xx); basic_vlin(10,ram[YY],9+ram[XX]);
if (xx==match) color_equals(color2*3); if (ram[XX]==ram[MATCH]) color_equals(ram[COLOR2]*3);
else color_equals(color2); else color_equals(ram[COLOR2]);
if (yy!=34) basic_vlin(yy,34,9+xx); if (ram[YY]!=34) basic_vlin(ram[YY],34,9+ram[XX]);
xx++; ram[XX]++;
} }
yadd=-yadd; ram[YADD]=-ram[YADD];
}
static void draw_logo(void) {
ram[XX]=0;
ram[YY]=10;
ram[YADD]=6;
ram[COLOR1]=1;
ram[COLOR2]=0;
draw_segment();
ram[COLOR2]=4;
draw_segment();
ram[COLOR1]=2;
draw_segment();
draw_segment();
draw_segment();
ram[COLOR2]=0;
draw_segment();
grsim_update();
} }
int main(int argc, char **argv) { int main(int argc, char **argv) {
@ -97,34 +122,13 @@ int main(int argc, char **argv) {
/* VMW splash */ /* VMW splash */
yy=10; ram[MATCH]=100;
xx=0; draw_logo();
yadd=6;
match=100;
draw_segment(1,0);
draw_segment(1,4);
draw_segment(2,4);
draw_segment(2,4);
draw_segment(2,4);
draw_segment(2,0);
grsim_update();
usleep(100000); usleep(100000);
for(match=0;match<30;match++) { for(ram[MATCH]=0;ram[MATCH]<30;ram[MATCH]++) {
yy=10; draw_logo();
xx=0;
yadd=6;
draw_segment(1,0);
draw_segment(1,4);
draw_segment(2,4);
draw_segment(2,4);
draw_segment(2,4);
draw_segment(2,0);
grsim_update(); grsim_update();
usleep(20000); usleep(20000);