Radio Shack TRS-80 Service Manual page 109
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Also See for TRS-80:
- Reference manual (274 pages) ,
- User manual (236 pages) ,
- Service manual (199 pages)
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102
Controller·to·Disk Drive
Ground
Signal
Description (Mnemonic)
1
2
(Spare)
3
•
(Spare)
•
6
(Spare)
(inlernall
(external)
•
10
SELECT 1,3
(051
4
1
(DS3
4
1
11
12
SELECT 2,4
(DS2
4
1
(DS4
4
)
13
"
(Spare)
"
16
DRIVE-MOTOR ENABLE IMOTORQN)
17
,.
DIRECTION IDIR
4
,
I.
20
STEP
ISTEP~1
21
22
COMPENSATED WRITE DATA (CWD)
23
24
WRITE GATE (WG
4
j
31
32
SIDE SELECT (SDSELI
33
3'
(Spare)
Disk Drive-to-Controller
Ground
Signal
Description (Mnemonic)
7
•
INDEX PULSE IIp
4
)
2.
2.
TRACK 00
(TRKO~)
27
2.
WRITE PROTECT
(WPRT~)
2.
30
READ DATA (Ro")
33
34
(Sp;Jrel
TABLE 1. INTERFACE CONNECTOR PIN ASSIGNMENTS, J1 (external), J4 (internal)
Pin
SupplV Voltage
+12 VDC
2
Return (+12 VDC)
3
Return
(+5
VDC)
•
-+5
VDC
TABLE 2. POWER CONNECTOR
PIN ASSIGNMENT
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