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--- homecomputer:chip8:assembler [2021/02/22 16:10] – angelegt volkerp
+++ homecomputer:chip8:assembler [2021/02/22 16:22] (aktuell) – volkerp
@@ Zeile 4: / Zeile 4: @@
 oder
 c8asm
+  * org, end nicht schreiben
+  * beide verstehen die Standard-Syntax nach http://devernay.free.fr/hacks/chip8/C8TECH10.HTM
+<file plain syntax.asm>
+; This program just demonstrates and tests all the instructions in the assembler.
+; Don't try to run it. It will probably do strange things.
+; Comments start with semicolons
+start:				; labels are identifiers followed by colons
+	CLS
+	JP	start
+	JP	#123		; Hexadecimal numbers are preceded by # symbols
+	JP	v0, #123
+	JP	v0, end
+	call end
+	call #203
+	se V1, #AA
+	se V2, v3
+	sne V1, #AA
+	sne V2, v3
+end:
+	RET
+	add V1, #AA
+	add V2, v3
+	ld V1, #AA
+	ld V2, v3
+	or V2, v3
+	and VA, vb
+	xor VA, vb
+	shr VA, vb
+	shr VA
+	subn VA, vb
+	shl VA, vb
+	shl VA
+	rnd VD, #FF
+	drw VE, VF, #4
+	skp VE
+	sknp VA
+	add I, V8
+	ld I, #AAA
+	ld V5, DT
+	ld V5, K
+	ld DT, V5
+	ld ST, V5
+	ld F, V5
+	ld B, V5
+	ld [I], VA
+	ld VA, [I]
+; "define" can be used to define constants
+define aaa #222
+	jp aaa
+; "define" can also be used to define aliases for registers
+define bbb vd
+	ld bbb, %01010101	; Binary literals start with % symbols
+	JP %101001010101
+	JP x
+	LD I, x
+; SCHIP instructions are supported
+	SCD	#4
+	SCL
+	SCR
+	EXIT
+	HIGH
+	LOW
+	DRW V1, V2, 0
+	LD HF, V5
+	LD R, V6
+	LD V7, R
+; Offset moves the location where output is generated
+offset #280
+; This is how you can define sprites:
+; "db" emits raw bytes, separated by commas.
+; "dw" can emit 16-bit words.
+x: db #11, #22, #33, #44
+y: db
+	%00100100,
+	%11111111,
+	%01011010,
+	%00111100,
+	%00100100
+	CLS
+</file>