(subleq.tal) Added new exercise

projects/examples/exercises/subleq.tal

@@ -0,0 +1,45 @@
+
+( uxnasm subleq.tal subleq.rom && uxncli subleq.rom )
+
+%EMIT { #18 DEO }
+%HALT { #0101 #0e DEO2 }
+%RTN  { JMP2r }
+%GET  { #10 SFT2 ;program ADD2 LDA2 }
+%SET  { #10 SFT2 ;program ADD2 STA2 }
+
+|0000 @a $2 @b $2 @c $2
+|0100
+
+	( pointer ) #0000 
+	&while
+		,eval JSR
+		DUP2 #8000 LTH2 ,&while JCN
+	POP2
+	HALT
+
+BRK
+
+@eval ( ip* -- ip* )
+
+	DUP2 GET .a STZ2
+	INC2 DUP2 GET .b STZ2
+	INC2 DUP2 GET .c STZ2
+	INC2
+	( I/O )
+ 	.a LDZ2 #ffff NEQ2 ,&noin JCN 
+ 		( nothing. ) ,&end JMP2 &noin
+	.b LDZ2 #ffff NEQ2 ,&noout JCN 
+		.a LDZ2 GET NIP EMIT ,&end JMP &noout
+	( SUBLEQ )
+	.b LDZ2 GET .a LDZ2 GET SUB2 .b LDZ2 SET
+	( SET )
+	.b LDZ2 GET #0001 SUB2 #8000 LTH2 ,&end JCN
+		POP2 .c LDZ2  &end
+
+RTN
+
+@program ( hello world )
+	000f 0011 ffff 0011 ffff ffff 0010 0001 
+	ffff 0010 0003 ffff 000f 000f 0000 0000 
+	ffff 0048 0065 006c 006c 006f 002c 0020 
+	0077 006f 0072 006c 0064 0021 000a 0000