Started implementing structs everywhere

README.md

@@ -24,33 +24,24 @@ evaluxn(u, u->vframe); /* Each frame
 
 ## Assembly Syntax
 
-### Assign
-
+- `ADD`, an opcode.
 - `@label`, assign the current address to a label.
 - `;variable 2`, assign an address to a label automatically.
 - `:const 1a2b`, assign an address to a label manually.
 - `&macro { x 2 y 2 }`, define a macro named `macro`.
-
-### Write
-
-- `ADD`, an opcode.
-- `#1a`, a literal byte.
-- `#12ef`, a literal short.
-- `+1a`, a literal signed byte.
-- `+12ef`, a literal signed short.
-- `-1a`, a literal signed byte(negative).
-- `-12ef`, a literal signed short(negative).
-- `.ab`, a raw byte in memory.
-- `.abcd`, a raw short in memory.
+- `#1a`, a literal byte/short.
+- `+1a`, a literal signed byte/short.
+- `-1a`, a literal signed byte/short(negative).
+- `.ab`, a raw byte/short in memory.
 - `,literal`, push label address to stack, prefixed with `LIT LEN`.
-
-### Special
-
-- `( comment )`, toggle parsing on/off.
-- `|0010`, move to position in the program.
-- `"hello`, push literal bytes for word "hello".
 - `=label`, helper to STR, equivalent to `,label STR`, or `label STR2`.
 - `~label`, helper to LDR, equivalent to `,label LDR2`, or `,label LDR2`.
+- `|0010`, move to position in the program.
+- `<23`, move the program position `23` bytes backward.
+- `>12`, move the program position `12` bytes forward.
+- `( comment )`, toggle parsing on/off.
+- `[ 0123 abcd ]`, write shorts to memory.
+- `[ Hello World ]`, write text to memory.
 
 ### Operator modes
 
@@ -60,25 +51,33 @@ evaluxn(u, u->vframe); /* Each frame
 - `ADDS2?`, modes can be combined.
 
 ```
-( comment )
+( hello world )
 
 :dev/w fff9 ( const write port )
 
 |0100 @RESET 
-
-	,string                                  ( add string pointer to stack )
-	@loop
-		DUP2 LDR IOW                         ( write pointer value to console )
-		#0001 ADD2                           ( increment string pointer )
-		DUP2 LDR #00 NEQ ,loop ROT JMP? POP2 ( while *ptr!=0 goto loop )
+	
+	#00 =dev/w ( set dev/write to console ) 
+	,text1 ,print-label JSR ( print to console )
 
 BRK
 
-@string " Hello World "                      ( add string to memory )
+@print-label ( text )
+
+	@cliloop
+		DUP2 LDR IOW                             ( write pointer value to console )
+		#0001 ADD2                               ( increment string pointer )
+		DUP2 LDR #00 NEQ ,cliloop ROT JMP? POP2  ( while *ptr!=0 goto loop )
+	POP2
+		
+RTS                 
+
+@text1 [ Hello World ] <1 .00 ( add text to memory, return 1 byte, add null byte )
 
-|c000 @FRAME BRK
-|d000 @ERROR BRK 
+|c000 @FRAME
+|d000 @ERROR 
 
+|FFF0 [ f3f0 f30b f30a ] ( palette )
 |FFFA .RESET .FRAME .ERROR
 ```
 

assembler.c

@@ -80,6 +80,18 @@ pushshort(Uint16 s, int lit)
 	pushbyte(s & 0xff, 0);
 }
 
+void
+pushtext(char *s, int lit)
+{
+	int i = 0;
+	char c;
+	if(lit)
+		pushbyte(0x22, 0);
+	while((c = s[i++]))
+		pushbyte(c, 0);
+	pushbyte(' ', 0);
+}
+
 Macro *
 findmacro(char *s)
 {
@@ -253,54 +265,20 @@ skipblock(char *w, int *cap, char a, char b)
 	return 0;
 }
 
-int
-skipstring(char *w, int *cap, Uint16 *addr)
-{
-	if(w[0] == '"') {
-		if(*cap)
-			*addr += 1;
-		*cap = !(*cap);
-		return 1;
-	}
-	if(*cap) {
-		*addr += slen(w) + 1;
-		return 1;
-	}
-	return 0;
-}
-
-int
-capturestring(char *w, int *cap)
-{
-	if(w[0] == '"') {
-		if(*cap)
-			pushbyte(0x00, 0);
-		*cap = !(*cap);
-		return 1;
-	}
-	if(*cap) {
-		int i;
-		for(i = 0; i < slen(w); ++i)
-			pushbyte(w[i], 0);
-		pushbyte(' ', 0);
-		return 1;
-	}
-	return 0;
-}
-
 int
 pass1(FILE *f)
 {
-	int ccmnt = 0, cstrg = 0, cbits = 0;
+	int ccmnt = 0, cbits = 0;
 	Uint16 addr = 0;
 	char w[64];
 	printf("Pass 1\n");
 	while(fscanf(f, "%s", w) == 1) {
 		if(skipblock(w, &ccmnt, '(', ')')) continue;
-		if(skipstring(w, &cstrg, &addr)) continue;
-		if(skipblock(w, &cbits, '[', ']'))
-			addr += w[0] != '[' && w[0] != ']' ? 2 : 0;
-		else if(w[0] == '@') {
+		if(skipblock(w, &cbits, '[', ']')) {
+			if(w[0] == '[' || w[0] == ']')
+				continue;
+			addr += sihx(w) ? 2 : slen(w) + 1;
+		} else if(w[0] == '@') {
 			if(!makelabel(w + 1, addr, 0, NULL))
 				return error("Pass1 failed", w);
 		} else if(w[0] == ';') {
@@ -317,6 +295,8 @@ pass1(FILE *f)
 		else {
 			switch(w[0]) {
 			case '|': addr = shex(w + 1); break;
+			case '<': addr -= shex(w + 1); break;
+			case '>': addr += shex(w + 1); break;
 			case '=': addr += 4; break; /* STR helper */
 			case '~': addr += 4; break; /* LDR helper */
 			case ',': addr += 3; break;
@@ -335,7 +315,7 @@ pass1(FILE *f)
 int
 pass2(FILE *f)
 {
-	int ccmnt = 0, cstrg = 0, cbits = 0, cmacro = 0;
+	int ccmnt = 0, cbits = 0, cmacro = 0;
 	char w[64];
 	printf("Pass 2\n");
 	while(fscanf(f, "%s", w) == 1) {
@@ -345,10 +325,14 @@ pass2(FILE *f)
 		if(w[0] == '&') continue;
 		if(skipblock(w, &ccmnt, '(', ')')) continue;
 		if(skipblock(w, &cmacro, '{', '}')) continue;
-		if(capturestring(w, &cstrg)) continue;
 		/* clang-format off */
-		if(skipblock(w, &cbits, '[', ']')) { if(w[0] != '[' && w[0] != ']') { pushshort(shex(w), 0); } }
+		if(skipblock(w, &cbits, '[', ']')) {
+			if(w[0] == '[' || w[0] == ']') { continue; }
+			if(slen(w) == 4 && sihx(w)) pushshort(shex(w), 0); else pushtext(w, 0);
+		}
 		else if(w[0] == '|') p.ptr = shex(w + 1);
+		else if(w[0] == '<') p.ptr -= shex(w + 1);
+		else if(w[0] == '>') p.ptr += shex(w + 1);
 		else if((op = findopcode(w)) || scmp(w, "BRK", 4)) pushbyte(op, 0);
 		else if(w[0] == ':') fscanf(f, "%s", w);
 		else if(w[0] == ';') fscanf(f, "%s", w);

examples/blending.usm

@@ -2,15 +2,9 @@
 
 :dev/w fff9 ( const write port )
 
-;x1 2 ;y1 2
-
-;x 2 ;y 2 ;color 1
-
 |0100 @RESET 
 	
 	#02 =dev/w 
-
-	#01 =color
 	#00 ,icon #0040 #0040 ,draw-sprite JSR
 	#01 ,icon #0048 #0040 ,draw-sprite JSR
 	#02 ,icon #0050 #0040 ,draw-sprite JSR

examples/devconsole.usm

@@ -2,27 +2,24 @@
 
 :dev/w fff9 ( const write port )
 
-;x 2 ;y 2 ;color 1
-
 |0100 @RESET 
 	
-	( set dev/write to console ) 
-	#00 =dev/w                                   
-	( print to console )
-	,text ,displaycli JSR
+	#00 =dev/w ( set dev/write to console ) 
+	,text1 ,print-label JSR ( print to console )
 
 BRK
 
-@displaycli
+@print-label ( text )
 
 	@cliloop
 		DUP2 LDR IOW                             ( write pointer value to console )
 		#0001 ADD2                               ( increment string pointer )
 		DUP2 LDR #00 NEQ ,cliloop ROT JMP? POP2  ( while *ptr!=0 goto loop )
+	POP2
 		
-RTS
+RTS                 
 
-@text " Hello World "                     ( add characters to memory )
+@text1 [ Hello World ] <1 .00 ( add text to memory, return 1 byte, add null byte )
 
 |c000 @FRAME
 |d000 @ERROR 

examples/devctrl.usm

@@ -3,15 +3,18 @@
 :dev/r fff8 ( const read port )
 :dev/w fff9 ( const write port )
 
-;x 2 ;y 2 ;sprite 2
+&Point2d { x 2 y 2 }
+
+;pos Point2d 
+;sprite 2
 
 |0100 @RESET 
 
 	#03 =dev/r ( set dev/read to controller ) 
 	#02 =dev/w ( set dev/write to sprite ) 
-	#0080 =x #0040 =y ( origin )
+	#0080 =pos.x #0040 =pos.y ( origin )
 
-	#12 ,up_icn ~x ~y ,draw-sprite JSR
+	#12 ,up_icn ~pos.x ~pos.y ,draw-sprite JSR
 
 BRK
 
@@ -23,22 +26,22 @@ BRK
 
 	#00 IOR #10 NEQ ,next1 ROT JMP? POP2
 		,up_icn =sprite
-		~y #0001 SUB2 =y
+		~pos.y #0001 SUB2 =pos.y
 	@next1
 	#00 IOR #20 NEQ ,next2 ROT JMP? POP2
 		,down_icn =sprite
-		~y #0001 ADD2 =y
+		~pos.y #0001 ADD2 =pos.y
 	@next2
 	#00 IOR #40 NEQ ,next3 ROT JMP? POP2
 		,left_icn =sprite
-		~x #0001 SUB2 =x
+		~pos.x #0001 SUB2 =pos.x
 	@next3
 	#00 IOR #80 NEQ ,end ROT JMP? POP2
 		,right_icn =sprite
-		~x #0001 ADD2 =x
+		~pos.x #0001 ADD2 =pos.x
 	@end
 	( redraw )
-	#13 ~sprite ~x ~y ,draw-sprite JSR
+	#13 ~sprite ~pos.x ~pos.y ,draw-sprite JSR
 
 BRK
 

examples/label.usm

@@ -29,7 +29,7 @@
 
 BRK
 
-@text " Hello World " ( add string to memory )
+@text [ Hello World ] <1 .00 ( add characters to memory )
 
 @draw-label ( x1 y1 text )
 	=y1 =x1

examples/struct.usm

@@ -15,7 +15,7 @@
 	#ff =red.r
 	~red.r
 
-	( short mode )_
+	( short mode )
 	#1234 =rc1.x
 	#abcd =rc1.height
 	~rc1.height

examples/window.usm

@@ -134,11 +134,11 @@ RTS
 @checkoff_icn  [ 7e81 8181 8181 817e ]
 @checkon_icn  [ 7e81 99bd bd99 817e ]
 
-@text1 " Planet " ( add string to memory )
-@text2 " To Jupiter " 
-@text3 " To Neptune " 
-@text4 " To Nereid " 
-@text5 " Theme " 
+@text1 [ Planet ] <1 .00 ( add string to memory )
+@text2 [ To Jupiter ] <1 .00
+@text3 [ To Neptune ] <1 .00
+@text4 [ To Nereid ] <1 .00
+@text5 [ Theme ] <1 .00
 
 @font ( spectrum-zx font ) 
 [