Sega GENESIS II Service Manual page 22

• Description
Pin
I
No.1
Name
11/0!
Function
Pin
I
No.
Name
iuo
J
Function
I
SDO
41 - VSYNC 0
2
I
SDI
42 - CSYNC
110
VIDEO+ PSG
I
3 I SD2
43 - HSYNC
1/0
4 SD3
44 VDD
-
Power Supply.
I
Dual Port RAM Interface Signals.
5
SD4
45 -M3
I
I
6 SDS
46 -NTSC
7
SD6
47 -VPA
8 SD7
48 -HALT
0
9
I
- SEI
I
49 -RESET
68000 Interface Signals.
10 - SEO 50 FCO
I
II
- sc
51 FCI
12 -RASI 52 -MREQ
I/0 Z80 Interface Signals.
0 Dual Port RAM Interface Signals.
13
-CAS!
53
vss
-
GND
14 -WEI 54 AUSS
-
15 -WEO 55 MOR (ANLONG) 0
FM
16 - OEI 56 MOL (ANLONG)
-
17 RDO 57 SOUNDAVDD
-
18
RDI
Use This Pin Set To Open Cer-
I/0 Dual Port RAM Interface Signals. 58 -SOUND 110
19 RD2
tainly.
20 RD3
I
59 -ZRES
I/0
21
1
VSS
-
GND
60
-ZBAK
I
22 RD4
61
-NMI
0
ZBO
Interface Signals.
23
RDS 62
- ZBR
I/0
24
RD6 63 -WAIT
25 RD7 64 -EOE
0 P-SRAM Interface.
26 ADO
65 - NOE
27
ADI 66 -ZRAM
I/0 Dual Port RAM Interface Signals.
0 SRAM Interface.
28 AD2
67
-REF
29
AD3 68 - CAS2
30 AD4
69
- RA$2
31
ADS
70
-ASEL
32 AD6
71
-ROM
0
33 AD7 72 - FDC
34
I
VIDEO A VSS
-
73 -FDWR
35 R(ANLONG) 74 -CEO
36 G (ANLONG)
0
VIDEO+ PSG 75 -TIME
37 B(ANLONG)
76
-CART
I
38 VIDEOAVDD - 77 IAI4 0
39 - YS
0 78
-WRES I
40 SPA/B - 1/0 79
-DISK
I/0
22