Table of Contents

Hu6280 Netlist

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#

Hu6280 Netlist

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