add go code to convert dumps; update images

.gitignore

@@ -0,0 +1 @@
+dumps/hgr

dumps/hgr.go

@@ -0,0 +1,102 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"image"
+	"image/color"
+	"image/png"
+	"io/ioutil"
+	"log"
+	"os"
+)
+
+func xyAddr(x int, y int) int {
+	offset := (y & 7)
+	row := (y / 8) & 7
+	group := y / 64
+	yAddr := 0x28*group + 0x80*row + 0x400*offset
+	return yAddr + x/7
+}
+
+func addrXy(addr int) (int, int, bool) {
+	if addr < 0 || addr > 0x1fff {
+		return 0, 0, false
+	}
+	if addr%0x80 >= (0x28 * 3) {
+		return 0, 0, false
+	}
+
+	x := ((addr % 0x80) % 0x28) * 7
+
+	group := (addr % 0x80) / 0x28
+	offset := addr / 0x400
+	row := (addr - 0x28*group - 0x400*offset) / 0x80
+
+	y := group*64 + row*8 + offset
+
+	return x, y, true
+}
+
+func run(args []string) error {
+	if len(args) != 2 {
+		return errors.New("usage: hgr input output")
+	}
+
+	input, err := ioutil.ReadFile(args[0])
+	if err != nil {
+		return err
+	}
+
+	if len(input) != 0x2000 {
+		return fmt.Errorf("expected to read 0x4000 bytes from file %q; read 0x%04x", args[0], len(input))
+	}
+
+	palette := color.Palette{color.Black, color.White}
+	paletted := image.NewPaletted(image.Rect(0, 0, 560, 192), palette)
+	_ = paletted
+
+	for addr, val := range input {
+		x, y, ok := addrXy(addr)
+		if !ok {
+			continue
+		}
+		x0 := x * 2
+		if val&0x80 > 0 {
+			x0 += 1
+		}
+		for b := 0; b < 7; b++ {
+			c := color.Black
+			if val&(1<<uint(b)) > 0 {
+				c = color.White
+			}
+			paletted.Set(x0+2*b, y, c)
+			paletted.Set(x0+2*b+1, y, c)
+		}
+	}
+
+	f, err := os.Create(args[1])
+	if err != nil {
+		return err
+	}
+
+	if err := (&png.Encoder{CompressionLevel: png.BestCompression}).Encode(f, paletted); err != nil {
+		f.Close()
+		return err
+	}
+
+	if err := f.Close(); err != nil {
+		return err
+	}
+
+	_ = input
+
+	return nil
+}
+
+func main() {
+	err := run(os.Args[1:])
+	if err != nil {
+		log.Fatal(err)
+	}
+}

index.html

@@ -190,9 +190,13 @@
         ["images/airheart-560x192.png",     "Airheart",              true ],
         ["images/battle-chess.png",         "Battle Chess",          true ],
         ["images/archon.png",               "Archon",                false],
-	["images/archon-ii.png",	"Archon II",             true ],
-	["images/lode-runner.png",	"Lode Runner",           true ],
+        ["images/archon-ii.png",            "Archon II",             false],
+        ["images/lode-runner.png",          "Lode Runner",           false],
         ["images/marty-reader.png",         "Marty's Family Reader", true ],
+        ["images/bards-tale.png",           "Bard's Tale",           false],
+        ["images/dazzledraw-flower.png",    "DazzleDraw flower",     true ],
+        ["images/rescue-raiders-pic.png",   "Rescue Raiders (a)",    false],
+        ["images/rescue-raiders-words.png", "Rescue Raiders (b)",    false],
       ];
 
       const image1 = await screenEmu.loadImage("images/airheart-560x192.png");