Synchronous Port Manipulation on Due

I was looking everywhere for that, and it was right there the whole time! I put it into a table for reference if it's useful to anyone.

Due Pin	Port	Channel
0	A	8
1	A	9
2	B	25
3	C	28
4	C	26
5	C	25
6	C	24
7	C	23
8	C	22
9	C	21
10	C	29
11	D	7
12	D	8
13	B	27
14	D	4
15	D	5
16	A	13
17	A	12
18	A	11
19	A	10
20	A	12
21	A	13
22	B	26
23	A	14
24	A	15
25	D	0
26	D	1
27	D	2
28	D	3
29	D	6
30	D	9
31	A	7
32	D	10
33	C	1
34	C	2
35	C	3
36	C	4
37	C	5
38	C	6
39	C	7
40	C	8
41	C	9
42	A	19
43	A	20
44	C	19
45	C	18
46	C	17
47	C	16
48	C	15
49	C	14
50	C	13
51	C	12
52	B	21
53	B	14