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converted sprite_display.asm from HRM to C

This commit is contained in:
Wei-ju Wu 2016-09-22 10:15:13 -07:00
parent 9667769954
commit cb9243504c
2 changed files with 60 additions and 32 deletions
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16
hardware/common.h
View File

@ -16,9 +16,23 @@
#define BPL5PTL 0x0f2
#define BPLCON0 0x100
#define COLOR00 0x180
#define SPR0PTH 0x120
#define SPR0PTL 0x122
#define SPR1PTH 0x124
#define SPR1PTL 0x126
#define SPR2PTH 0x128
#define SPR2PTL 0x12a
#define SPR3PTH 0x12c
#define SPR3PTL 0x12e
#define SPR4PTH 0x130
#define SPR4PTL 0x132
#define SPR5PTH 0x134
#define SPR5PTL 0x136
#define SPR6PTH 0x138
#define SPR6PTL 0x13a
#define SPR7PTH 0x13c
#define SPR7PTL 0x13e
#define COLOR00 0x180
#define USE_PAL 1

76
hardware/sprites.c
View File

@ -3,35 +3,42 @@
#include <stdio.h>
#include "common.h"
#include "kingtut.h"
#define NUM_COLORS 32
#define NUM_BITPLANES 5
/*
* A simple setup to display a sprite.
*/
extern struct Custom custom;
char VERSION_STRING[] = "\0$VER: sprites 1.0 (21.09.2016)\0";
char VERSION_STRING[] = "\0$VER: sprites1 1.0 (21.09.2016)\0";
#define NUM_IMG_WORDS (20 * NUM_RASTER_LINES)
#define NUM_SPRITES (8)
#define COPLIST_SPRPTR_OFFSET 4
static UWORD __chip imdata[NUM_IMG_WORDS];
static UWORD __chip coplist[] = {
COP_MOVE(BPL1PTH, 0),
COP_MOVE(BPL1PTL, 0),
COP_MOVE(BPL2PTH, 0),
COP_MOVE(BPL2PTL, 0),
COP_MOVE(BPL3PTH, 0),
COP_MOVE(BPL3PTL, 0),
COP_MOVE(BPL4PTH, 0),
COP_MOVE(BPL4PTL, 0),
COP_MOVE(BPL5PTH, 0),
COP_MOVE(BPL5PTL, 0),
COP_MOVE(SPR0PTH, 0),
COP_MOVE(SPR0PTL, 0),
COP_MOVE(SPR1PTH, 0),
COP_MOVE(SPR1PTL, 0),
COP_MOVE(SPR2PTH, 0),
COP_MOVE(SPR2PTL, 0),
COP_MOVE(SPR3PTH, 0),
COP_MOVE(SPR3PTL, 0),
COP_MOVE(SPR4PTH, 0),
COP_MOVE(SPR4PTL, 0),
COP_MOVE(SPR5PTH, 0),
COP_MOVE(SPR5PTL, 0),
COP_MOVE(SPR6PTH, 0),
COP_MOVE(SPR6PTL, 0),
COP_MOVE(SPR7PTH, 0),
COP_MOVE(SPR7PTL, 0),
COP_WAIT_END,
COP_WAIT_END
};
// space ship data from the Hardware Reference Manual
static UWORD __chip spdat0[] = {
static UWORD __chip sprite_data[] = {
0x6d60, 0x7200, // VSTART+HSTART, VSTOP
// data here
0x0990, 0x07e0,
@ -48,31 +55,38 @@ int main(int argc, char **argv)
BYTE old_prio = SetTaskPri(current_task, TASK_PRIORITY);
BOOL is_pal = init_display();
custom.bplcon0 = 0x5200; // use bitplane 1-5 = BPU 101, composite color enable
custom.bplcon0 = 0x1200; // use bitplane 1-5 = BPU 101, composite color enable
custom.bpl1mod = 0; // modulo = 0 for odd bitplanes
custom.bplcon1 = 0; // horizontal scroll value = 0 for all playfields
custom.bplcon2 = 0x24; // sprites have priority over playfields
custom.bpl1mod = 0; // modulo = 0 for odd bitplanes
custom.ddfstrt = DDFSTRT_VALUE;
custom.ddfstop = DDFSTOP_VALUE;
custom.diwstrt = DIWSTRT_VALUE;
custom.diwstop = DIWSTOP_VALUE;
for (int i = 0; i < NUM_COLORS; i++) {
custom.color[i] = image_colors[i];
custom.color[0] = 0x008;
custom.color[1] = 0x000;
custom.color[17] = 0xff0; // color 1 for sprite 1
custom.color[18] = 0x0ff; // color 2 for sprite 1
custom.color[19] = 0xf0f; // color 3 for sprite 1
// fill the whole image data array, effectively setting
// the background to color 1
for (int i = 0; i < NUM_IMG_WORDS; i++) imdata[i] = 0xffff;
// set bitmap 0 pointer to initialized data
ULONG addr = (ULONG) imdata;
coplist[1] = (addr >> 16) & 0xffff;
coplist[3] = addr & 0xffff;
// point sprites 0-7 to the same data structure
for (int i = 0; i < NUM_SPRITES; i++) {
coplist[COPLIST_SPRPTR_OFFSET + i * 4 + 1] = (((ULONG) sprite_data) >> 16) & 0xffff;
coplist[COPLIST_SPRPTR_OFFSET + i * 4 + 3] = ((ULONG) sprite_data) & 0xffff;
}
// Initialize copper list with image data address
for (int i = 0; i < NUM_BITPLANES; i++) {
ULONG addr = (ULONG) &(image_data[i * 20 * NUM_RASTER_LINES]);
coplist[i * 4 + 1] = (addr >> 16) & 0xffff;
coplist[i * 4 + 3] = addr & 0xffff;
}
coplist[21] = (((ULONG) spdat0) >> 16) & 0xffff;
coplist[23] = ((ULONG) spdat0) & 0xffff;
//custom.dmacon = 0x8020;
custom.cop1lc = (ULONG) coplist;
custom.cop1lc = (ULONG) coplist;
custom.dmacon = 0x83a0; // Bitplane + Copper + Sprite DMA activate
custom.copjmp1 = 1;
waitmouse();