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PIN
SIGNAL
NO .
MNEMON I C
34
DBYT
35
10SB
36
D1
37
D3
38
D5
39
D7
40
GND
41
A1
42
SEL-
43
RD-
44
DTR-
45
RESET-
46
ARQ
47
+5
48
SYNC
49
MYAD
50
BP1
51
AD1
f
52
AD3
53
CBYT
54
GND
55
DB2-
56
DB4-
57
DB7-
58
DBB-
59
DB12-
60
DB14-
61
---
62
DEND
63
DE
64
PPON-
HP 27130A
Table 3- 8. BIC Chip Pin Connections (Continued)
BIC
MNEMONIC
DBYT
10SB
D1
D3
D5
D7
GND
A1
CHSEL-
DS1-
DTR-
RST-
ARQ
VCC
SYNC
MYAD
BP1
AD1
AD3
CBYT
GND
BIOD2-
BIOD4-
BIOD7-
BIODB-
BIOD12-
BIOD14-
DEND
DE
PPON-
DESCRIPTIOH
Device Byte, indicates that the current 16-bit
transfer ends with an odd byte
I/O Strobe
Data Bus, Bit 1
Data Bus, Bit 3
Data Bus, Bit 5
Data Bus, Bit 7
Ground
Register Address, Bit 1
BIC Select, enables the BIC to
to read or write
Z-80B Read
Data Transfer Request
Reset,
Attention Request
+5 V
Synchronize, signals that an
addressed bus operation is to
occur
My Address
Bus Primitive, Bit 1.
With BPO,
specifies bus primitive operation
Address Bus, Bit 1
Address Bus, Bit 3
Channel Byte, indicates that the current 16-bit
transfer ends with an odd byte
Ground
Backplane
Backplane
Backplane
Backplane
Backplane
Backplane
Not used
I/O Data,
I/O Data,
I/O Data,
I/O Data,
I/O Data,
I/O Data,
Bit 2
Bit 4
Bit 7
Bit 8
Bit 12
Bi
t
14
Device End, indicates end of
transfer
Direction Enable
Primary Power On
3-23
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