Tektronix 070-9778-03, Service Manual

Page: 39 / 119

Operating Information
TLA 711 Color Benchtop Controller Service Manual
2–5
LPT Connector. The LPT port is a parallel printer port. This parallel printer port
supports standard Centronics mode, Enhanced Parallel Port (EPP), or Microsoft
high-speed mode (ECP), and utilizes a 36-pin high density Centronics compliant
connector. The LPT port is compliant with IEEE P1284-C/D2 for bidirectional
Parallel Peripheral Interface for Personal Computers style 1284-C. See Table 2–3
for pin assignments.
Table 2–3: LPT connector pin assignments
Pin number Pin function Pin number Pin function
1 BUSY 19 GND
2 SLCT 20 GND
3 ACK 21 GND
4 ERR 22 GND
5 PE 23 GND
6 D0 24 GND
7 D1 25 GND
8 D2 26 GND
9 D3 27 GND
10 D4 28 GND
11 D5 29 GND
12 D6 30 GND
13 D7 31 GND
14 INIT 32 GND
15 STB 33 GND
16 SLIN 34 GND
17 AFD 35 GND
18 HI? 36 GND
Note: See IEEE specification P1284-C for pin connection definitions for other modes
The benchtop controller has one standard 1/2 inch drive, that supports 3.5 inch,
1.44 MByte, high-density/double-sided floppy disks.
Floppy Disk Drive