Radio Shack TRS-80 II - MODII_16_TRM_FDC_REV_Page_11.jpg

JI (FOC Board to Floppy Disk) SIGNAL DESCRIPTIONS
PIN
1
2
3
4
5
6
7
e
•
la
11
12
13
14
"
16
17
,.
"
20
21
22
23
24
25
26
27
2.
2.
30
31
32
33
34
35
36
37
3.
3.
40
41
42
43
44
45
46
47
4.
4'
50
SIGNAL
NAME
GND
WRTCRr
GND
Ne
GND
Ne
GND
Ne
GND
TWOSIO-
GND
DSKCHGo
GND
SOSEl
GND
Ne
GND
HLO°
GND
IP"
GND
ROY
GND
Ne
GND
OS,"
GND
Dsr
GND
OS3"
GND
054°
GND
DIA"
GND
STEp·
GND
cpwo"
GND
WGo
GND
TRK0·
GND
WPRTo
GND
RD"
GND
Ne
GND
Ne
DESCRIPTION
Power Ground
Reduced Write Current
Power Ground
Not Connected
Power Ground
Not Connected
Power Ground
Not Connected
Power Ground
Two Sided Diskette Insulled
Power Ground
Drive Door Opened Sinee Lau Select
Power Ground
Side Select:
low .. side 0 • high ,. side 1
Power Ground
Not Connected
Power Ground
Head Load
Power Ground
Index Pulse
Power Ground
Drive Ready
Power Ground
Not Connected
Power Ground
Drive Select One
Power Ground
Drive Select Two
Power Ground
Drive Select Three
Power Ground
Drive Select Four
Power Ground
Step Direction
Power Ground
Step Head One Track
Power
Ground
Write Data
Power
Ground
Write Gate
Power Ground
Track Zero IndicatÎon
Power
Ground
Write Protected Diskette
Power
Ground
Read Data
Power Ground
Not Connected
Power
Ground
Not Connected
"Indicates an inverted signal or an active Jow signal.
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