Add cnrom example

pubby · Mar 9, 2023 · e1b6ce4 · e1b6ce4
1 parent cfa402d
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diff --git a/examples/cnrom/chr0.png b/examples/cnrom/chr0.png
diff --git a/examples/cnrom/chr1.png b/examples/cnrom/chr1.png
diff --git a/examples/cnrom/chr2.png b/examples/cnrom/chr2.png
diff --git a/examples/cnrom/chr3.png b/examples/cnrom/chr3.png
diff --git a/examples/cnrom/cnrom.cfg b/examples/cnrom/cnrom.cfg
@@ -0,0 +1,4 @@
+mapper = CNROM
+output = cnrom.nes
+input = ../../lib/nes.fab
+input = cnrom.fab
diff --git a/examples/cnrom/cnrom.fab b/examples/cnrom/cnrom.fab
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2023, Patrick Bene
+ * This file is distributed under the Boost Software License, Version 1.0.
+ * See LICENSE_1_0.txt or https://www.boost.org/LICENSE_1_0.txt 
+ */
+
+mode main()
+    // Set the palette:
+    palette = example_palette
+    ppu_upload_palette()
+
+    // Setup the nametable:
+    ppu_reset_addr($2000)
+    for U y = 0; y < 30; y += 1
+        for U x = 0; x < 32; x += 1
+            {PPUDATA}((x & %1111) + ((y & %1111) << 4))
+    ppu_set_scroll(0, 0)
+
+    // Animate the CHRROM:
+    state(0)
+    {PPUCTRL}(PPUCTRL_NMI_ON)
+    {PPUMASK}(PPUMASK_ON)
+    while true
+        state((state() + 1) & %11)
+        wait(8)
+
+// Define the tileset (commonly called CHR):
+chrrom
+    file(fmt, "chr0.png")
+    file(fmt, "chr0.png")
+    file(fmt, "chr1.png")
+    file(fmt, "chr1.png")
+    file(fmt, "chr2.png")
+    file(fmt, "chr2.png")
+    file(fmt, "chr3.png")
+    file(fmt, "chr3.png")