Specifications
Table A-2.
CN2
(C076
MAIN)
REV.-A
Table A-3.
CN3(C076
MAIN) (Cont.)
No.
1/0
Signal Name Function
1
- +5
+ 5
VDC
2
- +5
+ 5
VDC
3
- +5
+ 5
VDC
4 - +5
+ 5
VDC
5
- +5
+5
VDC
6
- +5
+5
VDC
7
0 TXD
Transmit data
8
0
READY
Ready to receive data
9
I
RXD
Receive data
10
-
NC
No connection
11
0
RST
Reset
12
0
INH
Inhibit
13
I
CMREQ
Command request
14
I
WRRDY
Write ready
15
i
RDREQ
Read request
16
0 WR
Write
17
0
RD
Read
18
0
Cs
chip select
19
-
GND
Signal ground
20 -
GND
Signal ground
21
-
GND
Signal ground
22 -
GND
Signal ground
23 -
GND
Signal ground
24 -
GND
Signal ground
25
0 A3
Address bus bit 3
26 0 A2 Address bus bit 2
27
0 Al
Address bus bit 1
28
0
AO
Address bus bit O
29
1/0
D7
Data bus bit 7
30
1/0
D6
Data bus bit 6
31
1/0
D5
Data bus bit 5
32
1/0
D4
Data bus bit 4
33
1/0
D3
Data bus bit 3
34
1/0
D2
Data bus bit 2
35
1/0
D1
Data bus bit 1
36
1/0
DO
Data bus bit O
Table A-3.
CN3
(C076
MAIN)
No.
1/0
Signal Name Function
1
- +5
+5
VDC
2
- +5 + 5
VDC
3
- +5
+ 5
VDC
4
I
ARE(3
Address request
5
0
CNT
MMI02
6
0
PROG
P-ROM chip select
7
0
RAM
RAM chip select
8
0
CG
CG ROM chip select
9
0
WR
Write strobe
10
0
CGA I 8
CG
address bit 17
11
0
RD
Read strobe
12
0 CGA13
CG address bit 13
13
0
CGA I 4
CG address bit 14
14
0
RAM 14
RAM address bit 14
15
0
CGA I 5
CG address bit 15
No.
1/0 Signal Name Function
16
0
RAM 15
RAM address bit 15
17
0 CGA16
CG address bit 16
18
0
RAM 16
RAM address bit 16
19
0
CGA17 CG address bit 17
20
0
AO
Address bit O
21
0 Al
Address bit 1
22 0 A2
Address bit 2
23
0 A3
Address bit 3
24 0
A4
Address bit 4
25 0
A5
Address bit 5
26
0 A6
Address bit 6
27
0
A7
Address bit 7
28 0
A8
Address bit 8
29 - +5
+ 5
VDC
30 - +5
+ 5
VDC
31
-
GND
Signal ground
32 -
GND
Signal ground
33 -
GND Signal ground
34 0
PROGAl 6
Program address bit 16
35
0
MREQ
Memory request
36
0
PROGAl 5
Program address bit 15
37 0
PROGAl 4
Program address bit 14
38 0
CGA22
CG address bit 22
39
0
CGA21
CG address bit 21
40 0
CGA20 CG address bit 20
41
0
CGA I 9
CG address bit 19
42 0
PROGAl 3
Program address bit 13
43
0 RAMAl 3
RAM address bit 13
44 0
A9
Address bit 9
45
0
A lO
Address bit 10
46 -
NC
Not connect
47
0 Al 1
Address bit 11
48 -
NC
Not connect
49
0 Al 2
Address bit 12
50
vo
D7
Data bus bit 7
51
1/0
D6
Data bus bit 6
52
1/0
D5
Data bus bit 5
53
1/0
D4
Data bus bit 4
54
1/0
D3
Data bus bit 3
55
1/0
D2
Data bus bit 2
56
1/0
D1
Data bus bit 1
57
1/0
DO
Data bus bit O
58 -
GND
Signal ground
59 -
GND
Signal ground
60 -
GND
Signal ground
A-3