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tidying
This commit is contained in:
Denis Molony
parent
1e1df8e633
commit
218f612877
@ -7,45 +7,45 @@ import com.bytezone.diskbrowser.utilities.HexFormatter;
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public class DoubleHiResImage extends HiResImage
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{
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// private static final int BLACK = 0x000000;
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// private static final int MAGENTA = 0xFF00FF;
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// private static final int BROWN = 0x994C00;
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// private static final int ORANGE = 0xFF9933;
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// private static final int DARK_GREEN = 0x006600;
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// private static final int GRAY = 0xA0A0A0;
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// private static final int GREEN = 0x00CC00;
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// private static final int YELLOW = 0xFFFF33;
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// private static final int DARK_BLUE = 0x0066CC;
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// private static final int PURPLE = 0xCC00CC;
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// private static final int PINK = 0xFFCCE5;
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// private static final int MEDIUM_BLUE = 0x3399FF;
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// private static final int LIGHT_BLUE = 0x99CCFF;
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// private static final int AQUA = 0x99FFFF;
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// private static final int WHITE = 0xFFFFFF;
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// private static int[] palette =
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// { BLACK, MAGENTA, BROWN, ORANGE, DARK_GREEN, GRAY, GREEN, YELLOW, DARK_BLUE, PURPLE,
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// GRAY, PINK, MEDIUM_BLUE, LIGHT_BLUE, AQUA, WHITE };
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private static final int BLACK = 0x000000;
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private static final int MAGENTA = 0x722640;
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private static final int DARK_BLUE = 0x40337F;
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private static final int PURPLE = 0xE434FE;
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private static final int DARK_GREEN = 0x0E5940;
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private static final int GRAY = 0x808080;
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private static final int MEDIUM_BLUE = 0x1B9AEF;
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private static final int LIGHT_BLUE = 0xBFB3FF;
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private static final int BROWN = 0x404C00;
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private static final int ORANGE = 0xE46501;
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private static final int PINK = 0xF1A6BF;
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private static final int GREEN = 0x1BCB01;
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private static final int YELLOW = 0xBFCC80;
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private static final int AQUA = 0x8DD9BF;
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private static final int MAGENTA = 0xFF00FF;
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private static final int BROWN = 0x994C00;
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private static final int ORANGE = 0xFF9933;
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private static final int DARK_GREEN = 0x006600;
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private static final int GRAY = 0xA0A0A0;
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private static final int GREEN = 0x00CC00;
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private static final int YELLOW = 0xFFFF33;
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private static final int DARK_BLUE = 0x0066CC;
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private static final int PURPLE = 0xCC00CC;
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private static final int PINK = 0xFFCCE5;
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private static final int MEDIUM_BLUE = 0x3399FF;
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private static final int LIGHT_BLUE = 0x99CCFF;
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private static final int AQUA = 0x99FFFF;
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private static final int WHITE = 0xFFFFFF;
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private static int[] palette =
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{ BLACK, MAGENTA, DARK_BLUE, PURPLE, DARK_GREEN, GRAY, MEDIUM_BLUE, LIGHT_BLUE,
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BROWN, ORANGE, GRAY, PINK, GREEN, YELLOW, AQUA, WHITE };
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{ BLACK, MAGENTA, BROWN, ORANGE, DARK_GREEN, GRAY, GREEN, YELLOW, DARK_BLUE, PURPLE,
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GRAY, PINK, MEDIUM_BLUE, LIGHT_BLUE, AQUA, WHITE };
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// private static final int BLACK = 0x000000;
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// private static final int MAGENTA = 0x722640;
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// private static final int DARK_BLUE = 0x40337F;
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// private static final int PURPLE = 0xE434FE;
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// private static final int DARK_GREEN = 0x0E5940;
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// private static final int GRAY = 0x808080;
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// private static final int MEDIUM_BLUE = 0x1B9AEF;
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// private static final int LIGHT_BLUE = 0xBFB3FF;
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// private static final int BROWN = 0x404C00;
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// private static final int ORANGE = 0xE46501;
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// private static final int PINK = 0xF1A6BF;
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// private static final int GREEN = 0x1BCB01;
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// private static final int YELLOW = 0xBFCC80;
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// private static final int AQUA = 0x8DD9BF;
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// private static final int WHITE = 0xFFFFFF;
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//
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// private static int[] palette =
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// { BLACK, MAGENTA, DARK_BLUE, PURPLE, DARK_GREEN, GRAY, MEDIUM_BLUE, LIGHT_BLUE,
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// BROWN, ORANGE, GRAY, PINK, GREEN, YELLOW, AQUA, WHITE };
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private final byte[] auxBuffer;
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private DoubleScrunch doubleScrunch;
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@ -56,7 +56,6 @@ public class DoubleHiResImage extends HiResImage
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super (name, buffer);
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this.auxBuffer = auxBuffer;
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createImage ();
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}
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@ -73,29 +72,6 @@ public class DoubleHiResImage extends HiResImage
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this.buffer = doubleScrunch.primaryBuffer;
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createImage ();
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// testes
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if (false)
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{
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byte b = -1;
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System.out.printf ("%02X %d%n", b, b);
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if (b < 0)
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System.out.println ("negative");
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b = -122;
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for (int i = 0; i < 10; i++)
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{
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--b;
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System.out.printf ("%4d %02X%n", b, b);
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}
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System.out.println ();
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b = (byte) 250;
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for (int i = 0; i < 10; i++)
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{
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++b;
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System.out.printf ("%4d %02X%n", b, b);
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}
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}
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}
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@Override
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@ -168,8 +144,10 @@ public class DoubleHiResImage extends HiResImage
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text.append ("Packed buffer:\n\n");
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text.append (HexFormatter.format (packedBuffer));
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}
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text.append ("\n\nAuxilliary buffer:\n\n");
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text.append (HexFormatter.format (auxBuffer));
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text.append ("\n\nPrimary buffer:\n\n");
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text.append (HexFormatter.format (buffer));
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@ -4,19 +4,21 @@ import com.bytezone.diskbrowser.utilities.CPU;
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public class DoubleScrunch extends CPU
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{
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private byte mem_71D0;
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private byte mem_71D2;
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private byte mem_71D3;
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private byte mem_71D4;
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private byte mem_71D0; // screen row index (X)
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private byte mem_71D2; // screen column index
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private byte mem_71D3; // byte to repeat
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private byte mem_71D4; // # of bytes to store
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private int src; // base address of packed buffer
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private int dst; // base address of main/aux memory
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private byte zp_00;
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private byte zp_00; // input buffer offset
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private byte zp_01;
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private byte zp_26;
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private byte zp_26; // output buffer offset
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private byte zp_27;
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private byte zp_E6;
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private byte zp_E6; // hi-res page ($20 or $40)
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final byte[] auxBuffer = new byte[0x2000];
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final byte[] primaryBuffer = new byte[0x2000];
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@ -31,21 +33,14 @@ public class DoubleScrunch extends CPU
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void unscrunch (byte[] buffer)
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{
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if (false)
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{
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ldx ((byte) 0x81);
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calculateScreenAddress ();
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return;
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}
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packedBuffer = buffer;
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src = 0x4000; // packed picture data
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dst = 0x2000; // main/aux picture data
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zp_00 = 0x00;
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zp_00 = 0x00; // load address of packed buffer
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zp_01 = 0x40;
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zp_E6 = 0x20; // hi-res page 1
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lda (zp_E6);
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@ -55,25 +50,29 @@ public class DoubleScrunch extends CPU
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ldx ((byte) 0x01);
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mem_71D0 = stx ();
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ldy ((byte) 0x00);
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mem_71D2 = sty ();
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zp_26 = sty ();
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mem_71D2 = sty (); // line offset = 0
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zp_26 = sty (); // output index = 0
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while (true)
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{
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// get the repetition counter (hi-bit is a flag to indicate copy/repeat)
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lda (packedBuffer, indirectY (src, zp_00, zp_01)); // LDA ($00),Y)
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php ();
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// prepare address to get next transfer byte (done in copy/repeat routine)
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zp_00 = inc (zp_00);
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if (zero)
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zp_01 = inc (zp_01);
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and ((byte) 0x7F);
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mem_71D4 = sta ();
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and ((byte) 0x7F); // remove copy/repeat flag
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mem_71D4 = sta (); // save repetition counter
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plp ();
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if (negative ? blockB () : blockA ())
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if (negative ? copyBytes () : repeatBytes ())
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break;
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// prepare address to get next repetition counter
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zp_00 = inc (zp_00);
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if (zero)
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zp_01 = inc (zp_01);
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@ -81,50 +80,54 @@ public class DoubleScrunch extends CPU
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}
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// $7144
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// repeat a single byte X times
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private boolean blockA ()
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// copy a single byte $71D4 times
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private boolean repeatBytes ()
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{
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// get the byte to store
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lda (packedBuffer, indirectY (src, zp_00, zp_01)); // LDA ($00),Y)
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mem_71D3 = sta ();
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do
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while (true)
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{
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lda (mem_71D3);
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lda (mem_71D3); // get the byte to store
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storeByte ();
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storeByte (); // store it and decrement repetition counter
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function_71B1 ();
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calculateScreenLine ();
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if (carry)
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return true; // completely finished
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return true; // completely finished
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calculateScreenAddress ();
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ldy (mem_71D4);
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} while (!zero);
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calculateNextScreenAddress ();
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return false; // not finished
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ldy (mem_71D4); // check the repetition counter
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if (zero)
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return false; // not finished
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}
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}
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// $717D
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// copy X single bytes
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private boolean blockB ()
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// copy the next $71D4 bytes
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private boolean copyBytes ()
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{
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while (true)
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{
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// get the byte to store
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ldy ((byte) 0x00);
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lda (packedBuffer, indirectY (src, zp_00, zp_01)); // LDA ($00),Y)
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storeByte ();
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storeByte (); // store it and decrement repetition counter
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function_71B1 ();
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calculateScreenLine ();
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if (carry)
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return true; // completely finished
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return true; // completely finished
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calculateScreenAddress ();
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calculateNextScreenAddress ();
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ldy (mem_71D4);
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ldy (mem_71D4); // check the repetition counter
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if (zero)
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return false; // not finished
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return false; // not finished
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// prepare address for next read
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zp_00 = inc (zp_00);
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if (zero)
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zp_01 = inc (zp_01);
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@ -134,7 +137,7 @@ public class DoubleScrunch extends CPU
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private void storeByte ()
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{
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mem_71D4 = dec (mem_71D4); // decrement counter
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ldy (mem_71D2); // load byte to store
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ldy (mem_71D2); // line offset
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php ();
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sei ();
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@ -154,7 +157,7 @@ public class DoubleScrunch extends CPU
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}
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// $70E8
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private void calculateScreenAddress ()
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private void calculateNextScreenAddress ()
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{
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txa ();
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and ((byte) 0xC0); // clear bits 5-0
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@ -186,12 +189,12 @@ public class DoubleScrunch extends CPU
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}
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// $71B1
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private void function_71B1 ()
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private void calculateScreenLine ()
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{
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inx ();
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inx ();
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cpx ((byte) 0xC0);
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if (!carry) // BCC $71CE (if X < 0xC0)
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if (!carry) // BCC $71CE
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{
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clc ();
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return;
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@ -206,7 +209,7 @@ public class DoubleScrunch extends CPU
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return;
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}
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mem_71D2 = inc (mem_71D2);
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mem_71D2 = inc (mem_71D2); // increment line offset
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ldy (mem_71D2);
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cpy ((byte) 0x50);
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if (carry) // BCS $71CF
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