Add Pep8 Assembly language (#2070)

Pep/8 is a toy assembly language used in some universities for teaching
the basics of assembly and low-level programming.

Signed-off-by: Lucas Bajolet <lucas.bajolet@gmail.com>

samples/Pep8/div.pep

@@ -0,0 +1,34 @@
+main:	SUBSP	8, i
+	DECI	0, s
+	DECI	2, s
+	CALL	div
+	DECO	4, s
+	CHARO	'\n', i
+	DECO	6, s
+	CHARO	'\n', i
+	STOP
+
+; Divides two numbers following the euclidian method
+;
+; Parameters:
+;	SP + 2: Dividend 
+;	SP + 4: Divider
+; Returns:
+;	SP + 6: Quotient
+;	SP + 8: Remain
+div:		LDX	0, i
+		LDA	dividend, s
+divlp:		CPA	divider, s
+		BRLT	divout
+		ADDX	1, i
+		SUBA	divider, s
+		BR	divlp
+divout:		STX	quot, s
+		STA	rem, s
+		RET0
+dividend:	.EQUATE 2
+divider:	.EQUATE 4
+quot:		.EQUATE 6
+rem:		.EQUATE 8
+
+		.END