NFG Games + GameSX

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PC Engine Chip Pinouts

This data was taken from numerous places. Special thanks to the usual PCE crew: Chris Covell, bt garner, Joann, and also to Backup Technik/GameLab magazine, from which I occasionally learned something new.

Conventions used

Throughout this page you'll find abbreviations and shorthand terms for a lot of connections. Here's a guide:

Short	Long	Short	Long
Dxx	Data (number)	Axx	Address (number)
/WR	Write Enable	/OE	Output Enable
/CE	Chip Enable	NC	Not Connected
I/O	Input/Output	RAxx	RAM pin#

Misc ICs are the two RAM chips (numbered 1, 2, and 12 for both)

The NetList

Someone once told me that when you make a list of connections on a circuit it's called a netlist. So here's the netlist for each chip.

Hu6270 - Graphics
Pin	Title	Hu6280	Exp Bus	HuCard Port	Hu6260	MiscIC	Notes
01		60
02	/WR	63	B4	34	77	3 27
03	/OE	62	A6	26	78	3 22
04	NC
05	NC
06	NC
07	NC
08	NC
09	NC
10	NC
11	Ground						Cap to +5v
12	NC
13	D7	56	B08	23	05		Held High
14	D6	55	A08	22	06		Held High
15	D5	54	C09	21	07		Held High
16	D4	53	B09	20	08		Held High
17	D3	52	C10	19	09		Held High
18	+5v
19	D2	51	B10	17	10		Held High
20	D1	50	C11	16	11		Held High
21	D0	49	C12	15	12		Held High
22			A10		72		Also Hu6270 25
23			A09		73
24	/RESET	11	B22	Card 36			To +5 via R104 + D101
25			A10		72		Also Hu6270 22
26			B11		71
27	NC
28			A12		70
29			A13		69
30			B14		68
31			A15		67
32	+5v
33	GND
34			A16		66
35			A17		65
36			A18		64
37			A19		63
38			A20		62
39	*WE					12 27
40	*OE					12 22
41	I/O 0					1 11
42	I/O 1					1 12
43	I/O 2					1 13
44	I/O 3					1 15
45	I/O 4					1 16
46	I/O 5					1 17
47	+5v
48	I/O 6					1 18
49	I/O 7					1 19
50	I/O 0					2 11
51	I/O 1					2 12
52	I/O 2					2 13
53	I/O 3					2 15
54	I/O 4					2 16
55	Ground
56	I/O 5					2 17
57	I/O 6					2 18
58	I/O 7					2 19
59	RA14					12 10
60	RA13					12 09
61	RA12					12 08
62	RA11					12 07
63	RA10					12 06
64	RA09					12 05
65	RA08					12 04
66	RA07					12 03
67	RA03					12 25
68	RA02					12 24
69	RA00					12 21
70	RA01					12 23
71	GND
72	+5v
73	RA06					12 02
74	RA04					12 26
75	RA05					12 01
76	*CE					12 20
77		44					Held High
78		12	B20				Held High
79	A0	6	B12	14	74
80	A1	5	C13	13	75

Hu 6260 - Video
Pin	Title	Hu6280	Exp Bus	HuCard Port	Hu6270	Notes
01	+5v
02	Clock					See Clock Notes
03	GND
04	NC
05	D7	56	B08	23	13	Held High
06	D6	55	A08	22	14	Held High
07	D5	54	C09	21	15	Held High
08	D4	53	B09	20	16	Held High
09	D3	52	C10	19	17	Held High
10	D2	51	B10	17	19	Held High
11	D1	50	C11	16	20	Held High
12	D0	49	C12	15	21	Held High
13	+5v
14	GND
15	GND
16	+5v
17						C109 to GND 50v 1uf
18						C108 to GND 50v 1uf
19	GND
20						26.64k ohm (R141) to Q103B
21	+5v
22	+5v
23						C111 to GND 50v 1uf
24						C110 to GND 50v 1uf
25	GND
26						8.8k ohm (R138) (See R134, 137)
27	+5v
28	+5v
29	GND
30	Video		A22			75k (R177) to GND, 16v 470uf, 22 (R181) → Video
31						C112 to GND 50v 1uf
32	GND
33						6.15k (R137) (See R134, 138)
34	+5v
35	+5v
36	+5v
37						C115 to GND 50v 1uf
38						C114 to GND 50v 1uf
39	GND
40						4.7k (R134) (See R137, 138)
41	+5v
42	+5v
43						Hu6260 46
44	Sync		C22
45	+5v
46						Hu6260 43
47	Green		B23
48	GND
49	Red		A23
50	+5v
51	Blue		C23
52	+5v
53	+5v
54	+5v
55	GND
56	GND
57	+5v
58	NC
59	NC
60	NC
61			A03
62			A20		38
63			A19		37
64			A18		36
65			A17		35
66			A16		34
67			A15		31
68			B14		30
69			A13		29
70			A12		28
71			B11		26
72			A10		25
73			A09		23
74	A0	06	B12	14	79
75	A1	05	C13	13	80
76	A2	04	B13	12
77	/WR	63	B04	34	02
78	/OE	62	B07	26	03
79		59	C04			6k (R155) to +5v
80	+5v

Hu6280 - CPU + Sound
Pin	Title	Hu6260	Exp Bus	HuCard Port	Hu6270	Notes
01	A5		B15	09
02	A4		C15	10
03	A3		C14	11
04	A2	76	B13	12
05	A1	75	C13	13	80
06	A0	74	B12	14	79
07	GND
08	+5v
09	NC
10	Clock					See Clock Note
11	/RESET		B22	36	24	To +5 via R104 + D101
12			B20		78
13	NC
14	HSM		B03	35		Speed: Low = Slow
15	+5v
16	GND
17	LeftA		A01			See Left Audio Note
18	RightA		C01			See Right Audio Note
19	+5v
20	MixA					See Mix Audio Note
21	GND
22	Control					FL102
23	NC
24	Control					FL103
25	Control					FL104
26	Control					FL105
27	NC
28	NC
29	NC
30	CD Detect		B02
31	Control					FL106
32	Control					FL107
33	NC
34	NC
35	NC
36	NC
37	NC
38	NC
39	NC
40	NC
41	NC
42	NC
43	/IRQ2		B21	37		R103 (Held High)
44					77	Held High
45			B05			R114
46	NC
47	+5v
48	GND
49	D0	12	C12	15	21	Held High
50	D1	11	C11	16	20	Held High
51	D2	10	B10	17	19	Held High
52	D3	09	C10	19	17	Held High
53	D4	08	B09	20	16	Held High
54	D5	07	C09	21	15	Held High
55	D6	06	A08	22	14	Held High
56	D7	05	B08	23	13	Held High
57	+5v
58	GND
59		79	C04			6k (R155) to +5v
60		01
61	/CE1					3 20
62	/OE	78	B07	26	03
63	/WR	77	B04	34	02
64	A20		B19	24		Doubles as /CE?
65	A19		C19	03
66	A18		A04	33
67	A17		C05	32
68	A16		B18	04
69	A15		C18	05
70	A14		A05	31
71	A13		C06	30
72	A12		B17	06
73	A11		C07	27
74	A10		A07	25
75	GND
76	+5v
77	A09		A06	28
78	A08		B06	29
79	A07		B16	07
80	A06		C16	08

Table of Contents

PC Engine Chip Pinouts

Conventions used

The NetList