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• IC609 SCSI CONTROL (SYM53CF92A) (MAIN board)
VSS
DREQ
DACK
DBWR
VDD
DB0
DB1
DB2
VSS
DB3
DB4
DB5
VSS
DB6
DB7
DBP
VDD
SD0
SD1
SD2
VSS
SD3
SD4
SD5
SD6
VSS
SD7
SDP
ATN
BSY
VSS
ACK
RST
MSG
SEL
VSS
C_D
REQ
I_O
VDD
MODE
INT
VSS
RESET
WR
RD
CS
CLK
A0
A1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
–
O
I
I
–
I/O
I/O
I/O
–
I/O
I/O
I/O
–
I/O
I/O
I/O
–
I/O
I/O
I/O
–
I/O
I/O
I/O
I/O
–
I/O
I/O
I
O
–
O
O
I/O
I
–
I/O
O
I/O
–
I
I
–
I
I
I
I
I
I
I
Ground
Not used
DMA controller
DMA write signal
+5V Power supply
DMA data bus
DMA data bus
DMA data bus
Ground
DMA data bus
DMA data bus
DMA data bus
Ground
DMA data bus
DMA data bus
Odd parity for DB7–0
Power supply
SCSI data signal
SCSI data signal
SCSI data signal
Ground
SCSI data signal
SCSI data signal
SCSI data signal
SCSI data signal
Ground
SCSI data signal
SCSI data signal
Schmitt trigger input
SCSI output
Ground
SCSI output
SCSI output
SCSI phase signal
Selector signal
Ground
SCSI phase signal
SCSI output
SCSI phase signal
+5V Power supply
Mode selector
Interrupt status input
Ground
Reset signal input
Write signal input
Read signal input
Select signal input
Clock signal input
Address inputs
Address inputs
Pin No.
Pin Name
I/O
Function