VCS has memory map; nes presets

presets/nes/flicker.c

@@ -0,0 +1,128 @@
+
+#include <stdlib.h>
+#include <string.h>
+
+// include NESLIB header
+#include "neslib.h"
+
+// include CC65 NES Header (PPU)
+#include <nes.h>
+
+// link the pattern table into CHR ROM
+//#link "chr_generic.s"
+
+///// METASPRITES
+
+// define a 2x2 metasprite
+#define DEF_METASPRITE_2x2(name,code,pal)\
+const unsigned char name[]={\
+        0,      0,      (code)+0,   pal, \
+        8,      0,      (code)+1,   pal, \
+        0,      8,      (code)+2,   pal, \
+        8,      8,      (code)+3,   pal, \
+        128};
+
+// define a 2x2 metasprite, flipped horizontally
+#define DEF_METASPRITE_2x2_FLIP(name,code,pal)\
+const unsigned char name[]={\
+        8,      0,      (code)+0,   (pal)|OAM_FLIP_H, \
+        0,      0,      (code)+1,   (pal)|OAM_FLIP_H, \
+        8,      8,      (code)+2,   (pal)|OAM_FLIP_H, \
+        0,      8,      (code)+3,   (pal)|OAM_FLIP_H, \
+        128};
+
+DEF_METASPRITE_2x2(playerRStand, 0xd8, 0);
+DEF_METASPRITE_2x2(playerRRun1, 0xdc, 0);
+DEF_METASPRITE_2x2(playerRRun2, 0xe0, 0);
+DEF_METASPRITE_2x2(playerRRun3, 0xe4, 0);
+DEF_METASPRITE_2x2(playerRJump, 0xe8, 0);
+DEF_METASPRITE_2x2(playerRClimb, 0xec, 0);
+DEF_METASPRITE_2x2(playerRSad, 0xf0, 0);
+
+DEF_METASPRITE_2x2_FLIP(playerLStand, 0xd8, 0);
+DEF_METASPRITE_2x2_FLIP(playerLRun1, 0xdc, 0);
+DEF_METASPRITE_2x2_FLIP(playerLRun2, 0xe0, 0);
+DEF_METASPRITE_2x2_FLIP(playerLRun3, 0xe4, 0);
+DEF_METASPRITE_2x2_FLIP(playerLJump, 0xe8, 0);
+DEF_METASPRITE_2x2_FLIP(playerLClimb, 0xec, 0);
+DEF_METASPRITE_2x2_FLIP(playerLSad, 0xf0, 0);
+
+DEF_METASPRITE_2x2(personToSave, 0xba, 1);
+
+const unsigned char* const playerRunSeq[16] = {
+  playerLRun1, playerLRun2, playerLRun3, 
+  playerLRun1, playerLRun2, playerLRun3, 
+  playerLRun1, playerLRun2,
+  playerRRun1, playerRRun2, playerRRun3, 
+  playerRRun1, playerRRun2, playerRRun3, 
+  playerRRun1, playerRRun2,
+};
+
+const char PALETTE[32] = {
+  0x03,			// background color
+
+  0x11,0x30,0x27, 0,	// ladders and pickups
+  0x1c,0x20,0x2c, 0,	// floor blocks
+  0x00,0x10,0x20, 0,
+  0x06,0x16,0x26, 0,
+
+  0x16,0x35,0x24, 0,	// enemy sprites
+  0x00,0x37,0x25, 0,	// rescue person
+  0x0d,0x2d,0x3a, 0,
+  0x0d,0x27,0x2a	// player sprites
+};
+
+// setup PPU and tables
+void setup_graphics() {
+  // clear sprites
+  oam_clear();
+  // set palette colors
+  pal_all(PALETTE);
+  // turn on PPU
+  ppu_on_all();
+}
+
+// number of actors (4 h/w sprites each)
+#define NUM_ACTORS 48
+
+// actor x/y positions
+char actor_x[NUM_ACTORS];
+char actor_y[NUM_ACTORS];
+// actor x/y deltas per frame
+char actor_dx[NUM_ACTORS];
+char actor_dy[NUM_ACTORS];
+
+// main program
+void main() {
+  char i;
+  char oam_id;
+  
+  setup_graphics();
+  // initialize actors with random values
+  for (i=0; i<NUM_ACTORS; i++) {
+    actor_x[i] = rand();
+    actor_y[i] = rand();
+    actor_dx[i] = (rand() & 7) - 3;
+    actor_dy[i] = (rand() & 7) - 3;
+  }
+  // loop forever
+  while (1) {
+    // start with OAMid/sprite 0
+    oam_id = 0;
+    // draw and move all actors
+    // (note we don't reset i each loop iteration)
+    while (oam_id < 252) {
+      // wrap around actor array
+      if (i >= NUM_ACTORS)
+        i -= NUM_ACTORS;
+      oam_id = oam_meta_spr(actor_x[i], actor_y[i], oam_id, playerRunSeq[i&15]);
+      actor_x[i] += actor_dx[i];
+      actor_y[i] += actor_dy[i];
+      i++;
+    }
+    // hide rest of sprites
+    oam_hide_rest(oam_id);
+    // wait for next frame
+    ppu_wait_frame();
+  }
+}

src/platform/nes.ts

@@ -19,6 +19,7 @@ const JSNES_PRESETS = [
   {id:'statusbar.c', name:'Status Bar'},
   {id:'sprites.c', name:'Sprites'},
   {id:'metasprites.c', name:'Metasprites'},
+  {id:'flicker.c', name:'Flickering Sprites'},
   {id:'metacursor.c', name:'Controllers'},
   {id:'neslib5.c', name:'RLE Unpack'},
   {id:'music.c', name:'Music Player'},
@@ -92,7 +93,6 @@ const _JSNESPlatform = function(mainElement) {
     ntvideo.create();
     $(ntvideo.canvas).hide();
     ntlastbuf = new Uint32Array(0x1000);
-    ntlastbuf.fill(-1);
     // toggle buttons
     $('<button>').text("Video").appendTo(debugbar).click(() => { $(video.canvas).toggle() });
     $('<button>').text("Nametable").appendTo(debugbar).click(() => { $(ntvideo.canvas).toggle() });
@@ -157,7 +157,6 @@ const _JSNESPlatform = function(mainElement) {
    // don't update if view is hidden
    if (! $(ntvideo.canvas).is(":visible"))
      return;
-  // TODO: doesn't work on scrolling example
    var a = 0;
    var attraddr = 0;
    var idata = ntvideo.getFrameData();
@@ -171,7 +170,7 @@ const _JSNESPlatform = function(mainElement) {
        var t = nes.ppu.ptTile[name];
        attraddr = (a & 0x2c00) | 0x3c0 | (a & 0x0C00) | ((a >> 4) & 0x38) | ((a >> 2) & 0x07);
        var attr = nes.ppu.mirroredLoad(attraddr);
-       var tag = name ^ (attr<<9);
+       var tag = name ^ (attr<<9) ^ 0x80000000;
        if (tag != ntlastbuf[a & 0xfff]) {
          ntlastbuf[a & 0xfff] = tag;
          var i = row*64*8*8 + col*8;

src/worker/workermain.ts

@@ -43,6 +43,12 @@ var PLATFORM_PARAMS = {
     code_size: 0xf000,
     data_start: 0x80,
     data_size: 0x80,
+    extra_segments:[
+      {name:'TIA Registers',start:0x00,size:0x80,type:'io'},
+      {name:'PIA RAM',start:0x80,size:0x80,type:'ram'},
+      {name:'PIA Ports and Timer',start:0x280,size:0x18,type:'io'},
+      {name:'Cartridge ROM',start:0xf000,size:0x1000,type:'rom'},
+    ],
   },
   'mw8080bw': {
     code_start: 0x0,
@@ -762,11 +768,13 @@ function assembleDASM(step:BuildStep) {
     lst.text = alst;
     lst.lines = [];
   }
+  var segments = step.params.extra_segments;
   return {
     output:aout,
     listings:listings,
     errors:errors,
     symbolmap:symbolmap,
+    segments:segments
   };
 }