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gr-sim: vlin support is working

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This commit is contained in:
Vince Weaver 2017-05-04 15:16:42 -04:00
parent 2b3f766c70
commit 2bedb2b369
1 changed files with 43 additions and 11 deletions
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54
gr-sim/gr-sim.c
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@ -38,10 +38,11 @@ unsigned char a,y,x;
#define GBASH 0x27
#define BASL 0x28
#define BASH 0x29
#define H2 0x2C
#define V2 0x2D
#define MASK 0x2E
#define COLOR 0x30
#define FIRST 0xF0
static SDL_Surface *sdl_screen=NULL;
@ -307,14 +308,6 @@ int basic_hlin(int x1, int x2, int at) {
return 0;
}
int basic_vlin(int y1, int y2, int at) {
int i;
for(i=y1;i<y2;i++) basic_plot(at,i);
return 0;
}
static void bascalc(void) {
// FBC1
@ -378,8 +371,7 @@ static void vline(void) {
// f828
vline_loop:
s=a;
//plot();
// FIXME
plot();
a=s;
if (a<ram[V2]) {
a++;
@ -538,3 +530,43 @@ int grsim_unrle(unsigned char *rle_data, int address) {
return 0;
}
int basic_vlin(int y1, int y2, int at) {
// f244
// LINCOOR
// GET "A,B AT C"
// PUT SMALLER OF (A,B) IN FIRST,
// AND LARGER OF (A,B) IN H2 AND V2.
// RETURN WITH (X) = C-VALUE.
if (y1>y2) { ram[H2]=y1; ram[V2]=y1; ram[FIRST]=y2; }
else { ram[H2]=y2; ram[V2]=y2; ram[FIRST]=y1; }
x=at;
if (x>48) {
fprintf(stderr,"Error! AT too large %d!\n",x);
}
//VLIN JSR LINCOOR
//F244- 8A 2050 TXA X-COORD IN Y-REG
//F245- A8 2060 TAY
//F246- C0 28 2070 CPY #40 X-COORD MUST BE < 40
//F248- B0 BC 2080 BCS GOERR TOO LARGE
//F24A- A5 F0 2090 LDA FIRST TOP END OF LINE IN A-REG
//F24C- 4C 28 F8 2100 JMP MON.VLINE LET MONITOR DRAW LINE
y=x;
if (y>=40) {
fprintf(stderr,"X value to big in vline %d\n",y);
return -1;
}
a=ram[FIRST];
vline();
// for(i=y1;i<y2;i++) basic_plot(at,i);
return 0;
}