common DMA list in CBDOS

src/dos_m65/assets/dos_dmalist_template.s

@@ -0,0 +1,11 @@
+
+dos_dmalist_template:
+
+	!byte $0A                         ; use F018A list format (it is shorter by 1 byte)
+	!byte $80, $00                    ; src. address is $00xxxxx
+	!byte $81, $00                    ; dst. address is $00xxxxx
+	!byte $00                         ; end of options
+	!byte $00                         ; operation: COPY
+	!word $0200                       ; data size if 512 bytes
+
+	; 3 bytes of src address + 3 bytes of dst address - not included in template