doc/vga.md

@@ -9,11 +9,11 @@ Registers
 | _FB_PS_ | $90C | Palette Select |
 | _FB_PD_ | $910 | Palette Data |
 | _FB_CTL_ | $914 | Control Register |
-| _FB_SHIFTER_ | $918 | Shift Assist Register |
-| _FB_SHIFTCOUNT_ | $91C | Shift Count Register |
-| _FB_SHIFTERM_   | $920 | Shifted Mask Register |
-| _FB_SHIFTERSP_  | $924 | Shifter Spill Register |
-| _FB_MASKGEN_    | $928 | Mask Generator Register |
+| _FB_SHIFTER | $918 | Shift Assist Register |
+| _FB_SHIFTCOUNT | $91C | Shift Count Register |
+| _FB_SHIFTERM   | $920 | Shifted Mask Register |
+| _FB_SHIFTERSP  | $924 | Shifter Spill Register |
+| _FB_MASKGEN    | $928 | Mask Generator Register |
 
 ## Pixel Data
 Pixel data is organized in 32-bit-words. With four bits per pixel, one word
@@ -121,12 +121,12 @@ For each four bits of a pixel, the corresponding four mask bits
 are all set to one if the pixel value is not zero.
 
 This can be used to combine foreground and background pixel data
-where a pixel value of zero is used to indicate a transparent foreground pixel.
+with a pixel value of zero for a transparent background color.
 
-Usually, the mask will be inverted with a *NOT* instruction.
-The result can then be used to clear all pixels in the background
-that are set in the foreground, using an *AND* instruction.
-As the last step, foreground and masked background data can be combined with an *OR* instruction.
+Usually, the mask will be inverted with a *NOT* instruction
+to clear all pixels in the background that are set in the foreground
+with an *AND* instruction
+before *ORing* foreground and background together.
 
 Example in hexadecimal, each digit is a pixel:
 | Pixel Data | Mask |

examples/animate.pas

@@ -1,5 +1,5 @@
 program animate;
-uses sprites,pcmaudio;
+uses sprites;
 
 type PictData = record
 		magic,mode:integer;
@@ -9,13 +9,12 @@ type PictData = record
 
      Sprite = record
      	x,y:integer;
+     	oldX,oldY:integer;
      	xdelta,ydelta:integer;
      	curFrame:integer;
      	frameCount:integer;
      	frameTime:integer;
      	frameLeft:integer;
-     	moveTime:integer;
-     	moveLeft:integer;
      	changed:boolean;
      	frame:array [0..3] of SpritePixels;
     end;
@@ -26,36 +25,9 @@ var pic:PictData;
     ch:char;
     stickMan:Sprite;
     rocket:Sprite;
-    rocket2:Sprite;
-    rocket3:Sprite;
-
-    buf:SndBufPtr;
-
 
 procedure WaitVSync; external;
 
-function readAudioFile(fname:string):SndBufPtr;
-var i,size:integer;
-    c:char;
-    buf:SndBufPtr;
-    f:file;
-begin
-	open(f, fname, ModeReadOnly);
-	size := FileSize(f);
-	new(buf, size);
-
-	buf^ := '';
-	write('Reading ', size, ' bytes from ', fname);
-	for i := 1 to size do
-	begin
-		read(f,c);
-		AppendChar(buf^,c);
-	end;
-	writeln;
-	close(f);
-	readAudioFile := buf;	
-end;
-
 procedure loadPalette(var pic:PictData);
 var i:integer;
 begin
@@ -83,95 +55,63 @@ end;
 procedure animateSprite(var aSprite:Sprite);
 var frameIndex:integer;
     frameTime,frameLeft:integer;
-    moveTime,moveLeft:integer;
     ydelta:integer;
+    oldX,oldY:integer;
 begin
 	ydelta := aSprite.ydelta;
 	frameIndex := aSprite.curFrame;
 	frameTime := aSprite.frameTime;
 	frameLeft := aSprite.frameLeft;
-	moveTime := aSprite.moveTime;
-	moveLeft := aSprite.moveLeft;
+	oldX := aSprite.x; oldY := aSprite.y;
+	aSprite.oldX := oldX; aSprite.oldY := oldY;
 
 	frameLeft := frameLeft - 1;
 	if frameLeft <= 0 then
 	begin
 		frameIndex := frameIndex + 1;
-		frameLeft := frameTime;
+		frameLeft := aSPrite.frameTime;
+		aSprite.frameLeft := frameLeft;
 		aSprite.curFrame := frameIndex;
 		if frameIndex >= aSprite.frameCount then
 			aSprite.curFrame := 0;
-	end;
 
-	moveLeft := moveLeft - 1;
-	if moveLeft <= 0 then
-	begin
+		aSprite.frameLeft := frameLeft;
+
 		aSprite.x := aSprite.x + aSprite.xdelta;
 		aSprite.y := aSprite.y + aSprite.ydelta;
-		moveLeft := moveTime;
 
 		if aSprite.x > 608 then aSprite.x := 0;
 
-		if aSprite.ydelta <> 0 then
+		if aSprite.y < 0 then
 		begin
-			if aSprite.y < 3 then
-				aSprite.ydelta := -aSprite.ydelta
-			else
-			if aSprite.y > 130 then
-				aSprite.ydelta := -aSprite.yDelta;
+			aSprite.y := 200;
+			aSprite.x := 0;
 		end;
 	end;
-	
 	aSprite.frameLeft := frameLeft;
-	aSprite.moveLeft := moveLeft;
 end;
 
 procedure animLoop;
 var i:integer;
     oldX,oldY:integer;
     roldX,roldY:integer;
-    r2oldX,r2oldY:integer;
-    r3oldX,r3oldY:integer;
 begin
 	stickMan.x := 0;
-	stickMan.y := 205;
+	stickMan.y := 310;
 	stickMan.frameTime := 6;
 	stickMan.frameLeft := stickMan.frameTime;
 	stickMan.curFrame := 0;
 	stickMan.xdelta := 2;
 	stickMan.ydelta := 0;
-	stickMan.moveTime := 2;
-	stickman.moveLeft := stickMan.moveTime;
+
 
 	rocket.x := 0;
-	rocket.y := 50;
-	rocket.frameTime := 5;
+	rocket.y := 200;
+	rocket.frameTime := 1;
 	rocket.frameLeft := rocket.frameTime;
 	rocket.curFrame := 0;
-	rocket.xdelta := 3;
-	rocket.ydelta := 1;
-	rocket.moveTime := 1;
-	rocket.moveLeft := rocket.moveTime;
-
-	rocket2.x := 50;
-	rocket2.y := 190;
-	rocket2.frameTime := 5;
-	rocket2.frameLeft := rocket2.frameTime;
-	rocket2.curFrame := 1;
-	rocket2.xdelta := 3;
-	rocket2.ydelta := 0;
-	rocket2.moveTime := 1;
-	rocket2.moveLeft := rocket2.moveTime;
-
-	rocket3.x :=100;
-	rocket3.y := 90;
-	rocket3.frameTime := 5;
-	rocket3.frameLeft := rocket3.frameTime;
-	rocket3.curFrame := 2;
-	rocket3.xdelta := 3;
-	rocket3.ydelta := -1;
-	rocket3.moveTime := 1;
-	rocket3.moveLeft := rocket3.moveTime;
+	rocket.xdelta := 2;
+	rocket.ydelta := -1;
 
 	while not ConAvail do
 	begin
@@ -181,29 +121,17 @@ begin
 		roldX := rocket.x;
 		roldY := rocket.y;
 
-		r2oldX := rocket2.x;
-		r2oldY := rocket2.y;
-
-		r3oldX := rocket3.x;
-		r3oldY := rocket3.y;
-
 		PutSprite(roldX, roldY, rocket.frame[rocket.curFrame]);
-		PutSprite(r2oldX, r2oldY, rocket2.frame[rocket2.curFrame]);
-		PutSprite(r3oldX, r3oldY, rocket3.frame[rocket3.curFrame]);
 		PutSprite(oldX, oldY, stickMan.frame[stickMan.curFrame]);
 
 		animateSprite(rocket);
-		animateSprite(rocket2);
-		animateSprite(rocket3);
 		animateSprite(stickMan);
 
-		Delay(10);
+		{Delay(1);}
 		WaitVSync;
 
 		UndrawSprite(oldX, oldY, pic.pixeldata);
 		UndrawSprite(roldX, roldY, pic.pixeldata);
-		UndrawSprite(r2oldX, r2oldY, pic.pixeldata);
-		UndrawSprite(r3oldX, r3oldY, pic.pixeldata);
 	end;
 end;
 
@@ -232,14 +160,5 @@ begin
 	loadSpriteFrame(rocket, 3, infile, 3);
 	close(infile);
 
-	rocket2 := rocket;
-	rocket3 := rocket;
-
-	buf := readAudioFile('footsteps.tdrau');
-	SampleQStart(buf, true, 16000);
-	
 	animLoop;
-
-	SampleQStop;
-	dispose(buf);
 end.

examples/default-palette.pal

@@ -1,19 +0,0 @@
-JASC-PAL
-0100
-16
-0 0 0
-255 255 255
-255 0 0
-0 255 0
-0 0 255
-0 255 255
-255 0 255
-255 255 0
-127 127 127
-160 160 160
-127 0 0
-0 127 0
-0 0 127
-0 127 127
-127 0 127
-127 127 0

examples/graphbench.pas

@@ -106,7 +106,7 @@ begin
 end;
 
 begin
-	readSpriteData('sprite-testcard.sprt');
+	readSpriteData('rocket.sprt');
 
 	InitGraphics;
 	startBench('points 200K');

examples/sprites.s

@@ -53,9 +53,9 @@ CALC_VMEM_ADDR:
 	.EQU PS_SPILL		24
 	.EQU PS_STRIPE_C	28
 	.EQU PS_BPSAVE		32
-	.EQU PS_FS_ 36
+	.EQU PS_FS 36
 PUTSPRITE:
-	FPADJ -PS_FS_
+	FPADJ -PS_FS
 	STORE PS_SPRITE_DATA
 	STORE PS_Y
 	STORE PS_X
@@ -175,7 +175,7 @@ PS_L_XT:
 	LOAD PS_BPSAVE
 	STOREREG BP
 
-	FPADJ PS_FS_
+	FPADJ PS_FS
 	RET
 
 ; undraw a sprite, i.e. draw background data

lib/corelib.s

@@ -977,7 +977,7 @@ SETPALETTE:
 
 DEFAULT_PALETTE:
 	.WORD 0,    $FFF, $F00, $0F0, $00F, $0FF, $F0F, $FF0
-	.WORD $777, $AAA, $700, $070, $007, $077, $707, $770
+	.WORD $777, $777, $700, $070, $007, $077, $707, $770
 
 ; set whole video memory to zero
 CLEARGRAPHICS:

tridoraemu/cpu.go

@@ -249,7 +249,6 @@ func (c *CPU) step() error {
 		var name string
 		if (insWord & 1) == 1 {
 			name = "STORE.B"
-			operand &= ^1
 			ea = c.BP + word(operand)
 		} else {
 			name = "STORE"

tridoraemu/framebuffer.go

@@ -10,16 +10,11 @@ import (
 const VmemWords = 32768
 const PaletteSlots = 16
 const FB_RA = 0
-const FB_WA = 4
-const FB_IO = 8
-const FB_PS = 12
-const FB_PD = 16
-const FB_CTL= 20
-const FB_SHIFTER = 24
-const FB_SHIFTCOUNT = 28
-const FB_SHIFTERM = 32
-const FB_SHIFTERSP = 36
-const FB_MASKGEN = 40
+const FB_WA = 1
+const FB_IO = 2
+const FB_PS = 3
+const FB_PD = 4
+const FB_CTL= 5
 
 const PixelMask = 0b11110000000000000000000000000000
 const PixelPerWord = 8
@@ -38,9 +33,6 @@ type Framebuffer struct {
 	vmem [VmemWords]word
 	readCount int
         paletteChanged bool
-	shiftAssistData word
-	shiftAssistCount int
-	maskGenData word
 }
 
 func (f *Framebuffer) initialize() {
@@ -61,11 +53,6 @@ func (f *Framebuffer) read(byteaddr word) (word, error) {
 	case FB_PS: result = f.paletteSlot
 	case FB_PD: result = f.readPalette()
 	case FB_CTL: result = f.readCtl()
-	case FB_SHIFTER: result = f.readShiftAssist()
-	case FB_SHIFTCOUNT: result = 0xFFFFFFF
-	case FB_SHIFTERM: result = f.readShifterM()
-	case FB_SHIFTERSP: result = f.readShifterSp()
-	case FB_MASKGEN: result = f.readMaskGen()
 	default:
 	}
 	return result, nil
@@ -80,11 +67,6 @@ func (f *Framebuffer) write(value word, byteaddr word) (error) {
 	case FB_PS: f.paletteSlot = value
 	case FB_PD: f.writePalette(value)
 	case FB_CTL: f.writeCtl(value)
-	case FB_SHIFTER: f.writeShiftAssist(value)
-	case FB_SHIFTCOUNT: f.writeShiftCount(value)
-	case FB_SHIFTERM:
-	case FB_SHIFTERSP:
-	case FB_MASKGEN: f.writeMaskGen(value)
 	default:
 	}
 
@@ -170,47 +152,3 @@ func (f *Framebuffer) readCtl() word {
 
 func (f *Framebuffer) writeCtl(value word) {
 }
-
-func (f *Framebuffer) writeShiftAssist(value word) {
-	f.shiftAssistData = value
-	f.shiftAssistCount = 0
-}
-
-func (f *Framebuffer) readShiftAssist() word {
-	return f.shiftAssistData >> (f.shiftAssistCount * 4)
-}
-
-func (f *Framebuffer) writeShiftCount(value word) {
-	f.shiftAssistCount = int(value & 0x7)
-}
-
-func (f *Framebuffer) readShifterM() word {
-	return convertToMask(f.readShiftAssist())
-}
-
-func pixelToMask(pixels word, mask word) word {
-	if (pixels & mask) != 0 { return  mask } else { return 0 }
-}
-
-func convertToMask(pixels word) word {
-	return  pixelToMask(pixels, 0xF0000000) |
-		pixelToMask(pixels, 0x0F000000) |
-		pixelToMask(pixels, 0x00F00000) |
-		pixelToMask(pixels, 0x000F0000) |
-		pixelToMask(pixels, 0x0000F000) |
-		pixelToMask(pixels, 0x00000F00) |
-		pixelToMask(pixels, 0x000000F0) |
-		pixelToMask(pixels, 0x0000000F)
-}
-
-func (f *Framebuffer) readShifterSp() word {
-	return word(f.shiftAssistData << ((8-f.shiftAssistCount)*4))
-}
-
-func (f *Framebuffer) writeMaskGen(value word) {
-	f.maskGenData = value
-}
-
-func (f *Framebuffer) readMaskGen() word {
-	return convertToMask(f.maskGenData)
-}

utils/tdrimg.py

@@ -620,9 +620,6 @@ def create_image_with_stuff(imgfile):
     slotnr = putfile("../examples/background.pict", None , f, part, partstart, slotnr)
     slotnr = putfile("../examples/walking.sprt", None , f, part, partstart, slotnr)
     slotnr = putfile("../examples/rocket.sprt", None , f, part, partstart, slotnr)
-    slotnr = putfile("../examples/sprite-testcard.sprt", None , f, part, partstart, slotnr)
-    slotnr = putfile("../examples/tiles.inc", None , f, part, partstart, slotnr)
-    slotnr = putfile("../examples/tiles.s", None , f, part, partstart, slotnr)
 
     listdir(f, part)