B&B Electronics Parallel Printer Card PIOC User manual

Documentation Number PIOC2595 Manual Cover Page
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH [phone] -- FAX [phone]
Parallel Printer Card
Model PIOC
Documentation Number PIOC2595
This product
Designed and Manufactured
In Ottawa, Illinois
USA
of domestic and imported parts by
B&B Electronics Mfg. Co. Inc.
707 Dayton Road -- P.O. Box 1040 -- Ottawa, IL 61350
PH [phone] -- FAX [phone]
Internet:
http://www.bb-elec.com
[e-mail]
[e-mail]
B&B Electronics -- Revised February 1995
Not Recommended for New Installations.
Please contact Technical Support for more information.

Documentation Number PIOC2595 Manual 1
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH [phone] -- FAX [phone]
Overview
The Parallel Printer Card (Model PIOC) is a bi-directional
parallel port for a standard IBM PC or compatible. The PIOC is
single port card that can be used as a printer interface or as a
general input/output port for any device. The base port address of
the card can be set for any address from 0 to 3FC hexadecimal.
This allows the card to be located at the standard parallel port
addresses, as well as any other unused address.
The PIOC can have up to 12 digital TTL compatible outputs and
up to 17 digital TTL compatible inputs. 12 of these inputs and
outputs share connector pins so you cannot have 12 inputs and 17
outputs at the same time. The input/output lines are available
through a female DB-25 connector.
To understand how the PIOC can be used you must first
understand how the IBM PC parallel port works from inside the
computer. Each parallel port has one main port address for
outputting data, the Base Register. The next two addresses above
that address are used for handshaking control. The first address is
the Status Register, and the second address is the Control Register.
For instance, on a typical computer LPT1 might be located at
hexadecimal address 378h, which is the Base Register. The Status
Register will be located at 379h and the Control Register will be
located at 37Ah. Table 1 shows the functions of each pin on the DB-
25 connector when the PIOC is connected to a printer.

2 Documentation Number PIOC2595 Manual
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Table 1 - Printer Functions
Setting the Address
The base address of the PIOC is set using a eight-position DIP
switch, SW1. The eight positions correspond to the I/O address lines
of A2 through A9 (see Table 2). If you set the a switch OFF the
corresponding I/O address line will be a ZERO and if you set it ON
the corresponding I/O address line will be a ONE. The factory
default address setting is 378h. To set the card to the 378h address
you must set A2 and 7 OFF and A3, 4, 5, 6, 8, and 9 ON. Table 3
shows the settings for LPT1 and LPT2.
PIOC DB-25
Connector Printer Function
1 Strobe
2 Data Bit 1
3 Data Bit 2
4 Data Bit 3
5 Data Bit 4
6 Data Bit 5
7 Data Bit 6
8 Data Bit 7
9 Data Bit 8
10 Acknowledge
11 Busy
12 Paper End
13 Select
14 Auto Feed
15 Error
16 Initialize Printer
17 Select Input
18 - 25 Ground

Documentation Number PIOC2595 Manual 3
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Table 2 - DIP Switch Functions
Table 3 - DIP Switch Weights
NOTE: A "1" indicates that the switch is ON and a "0"indicates that
the switch is OFF.
SW1 I/O Address
1 A9
2 A8
3 A7
4 A6
5 A5
6 A4
7 A3
8 A2
SW1 1 2 3 4 5 6 7 8 X X
Address: A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
Weight: 2 1 8 4 2 1 8 4 2 1
LPT1 (378h): 1 1 0 1 1 1 1 0 0 0
LPT2 (278h): 1 0 0 1 1 1 1 0 0 0

4 Documentation Number PIOC2595 Manual
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Table 4 - Hardware I/O Map of AT Class Machines
Any four byte space not listed in Table 4 and not used by any
other equipment in your system may be used for the parallel port.
Appendix A shows all the possible addresses and their settings.
Hex Address Address Function in AT Class Machines
000-01F DMA controller #1 (8237A-5)
020-03F interrupt controller #1 (8259A)
040-05F timer (8254)
060-06F keyboard (8042)
070-07F NMI - non maskable interrupt & CMOS RAM
080-09F DMA page register (74LS612)
0A0-0BF interrupt controller #2 (8259A)
0C0-0DF DMA controller #2 (8237A)
0F0-0FF 80287 math coprocessor
1F0-1F8 hard disk
200-20F game port joystick controller
258-25F Intel Above Board
278-27F parallel printer port 2
2E8-2EF COM4 serial port
2F8-2FF COM2 serial port
300-31F prototype card
378-37F parallel printer 1
380-38F SDLC or bisynch com 2
3A0-3AF bisynch com 1
3B0-3BF MDA - monochrome adapter
3BC-3BE parallel printer on monochrome adapter
3C0-3CF EGA - reserved
3D0-3D7 CGA - color graphics adapter
3E8-3EF COM 3 serial port
3F0-3F7 floppy diskette controller
3F8-3FF COM1 serial port

Documentation Number PIOC2595 Manual 5
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PH [phone] -- FAX [phone]
Using the PIOC as I/O
The PIOC may also be used as a general I/O device. The Base
Register has eight bi-directional lines. The direction of these lines is
based on bit 5 of the Control Register. If bit 5 of the Control Register
is a “1”, then the lines of the Base Register are defined as inputs. If
bit 5 of the Control Register is a “0”, then these lines are defined as
outputs (this is default state after “boot up”). If the Base Register is
being used as outputs, the states of the lines can be changed by
writing (outputting) to the Base Register. The states of these lines
can be determined by reading (inputting) the Base Register. Writing
(outputting) to the Base Register when the lines are defined as
inputs will have no affect on the port. Table 5 shows the functions of
the registers and their pinouts.
The five lines of the Status Register can only be used as inputs.
The four lines of the Control Register can be used as inputs or
outputs. The Control Register can be used as inputs by writing
(outputting) a byte with the following bit pattern “xxxx0100” (4h) to
the Control Register where “x” is a don’t care. Caution should be
taken to insure bits 4 and 5 remain in the desired state (See Notes 2
and 3). The states of these lines can be determined by reading
(inputting) the Control Register. The lines of the Control Register
can be used as outputs by writing (outputting) to the Control
Register.

6 Documentation Number PIOC2595 Manual
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Table 5 - Register Functions and Pinouts
NOTE 1: An "X" means no connection to any DB-25 pins.
NOTE 2: Bit 4 of the Control Register (37AH) as an output is used
to control IRQ7. When this bit is high, IRQ7 is enabled and when
this bit is low, IRQ7 is disabled. As an input this reads the status of
the Interrupt Enable.
NOTE 3: This bit is used to control the direction of the Base
Register (378H). Outputting a “1” to this bit defines the lines as
inputs. Outputting a “0”, which is default, to this bit defines the lines
as outputs.
BIT Base (378H) Status (379H) Control (37AH)
OUTPUT INPUT OUTPUT INPUT OUTPUT INPUT
0 2 2 X X 1 1
1 3 3 X X 14 14
2 4 4 X X 16 16
3 5 5 X 15 17 17
4 6 6 X 13
See Note 2 See Note2
5 7 7 X 12
See Note 3 See Note 3
6 8 8 X 10 X X
7 9 9 X 11 X X

Documentation Number PIOC2595 Manual 7
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH [phone] -- FAX [phone]
Appendix A
SW1:.........1.....2 . ..... 3.....4........5..... 6.....7........8 ....X.....X
Addr.: .....A9.. A8 . ...A7...A6.....A5...A4...A3.....A2 ..A1...A0
Weight:.....2.....1 . ..... 8.....4........2..... 1.....8........4 .... 2..... 1
000 ...........0.....0. .....0.....0........0..... 0.....0........0 .... 0..... 0
004 ...........0.....0. .....0.....0........0..... 0.....0........1 .... 0..... 0
008 ...........0.....0. .....0.....0........0..... 0.....1........0 .... 0..... 0
00C ...........0.....0. .....0.....0........0..... 0.....1........1 .... 0..... 0
010 ...........0.....0. .....0.....0........0..... 1.....0........0 .... 0..... 0
014 ...........0.....0. .....0.....0........0..... 1.....0........1 .... 0..... 0
018 ...........0.....0. .....0.....0........0..... 1.....1........0 .... 0..... 0
01C ...........0.....0. .....0.....0........0..... 1.....1........1 .... 0..... 0
020 ...........0.....0. .....0.....0........1..... 0.....0........0 .... 0..... 0
024 ...........0.....0. .....0.....0........1..... 0.....0........1 .... 0..... 0
028 ...........0.....0. .....0.....0........1..... 0.....1........0 .... 0..... 0
02C ...........0.....0. .....0.....0........1..... 0.....1........1 .... 0..... 0
030 ...........0.....0. .....0.....0........1..... 1.....0........0 .... 0..... 0
034 ...........0.....0. .....0.....0........1..... 1.....0........1 .... 0..... 0
038 ...........0.....0. .....0.....0........1..... 1.....1........0 .... 0..... 0
03C ...........0.....0. ..... 0.....0........1..... 1.....1........1 .... 0..... 0
040 ...........0.....0. .....0.....1........0..... 0.....0........0 .... 0..... 0
044 ...........0.....0. .....0.....1........0..... 0.....0........1 .... 0..... 0
048 ...........0.....0. .....0.....1........0..... 0.....1........0 .... 0..... 0
04C ...........0.....0. .....0.....1........0..... 0.....1........1 .... 0..... 0
050 ...........0.....0. .....0.....1........0..... 1.....0........0 .... 0..... 0
054 ...........0.....0. .....0.....1........0..... 1.....0........1 .... 0..... 0
058 ...........0.....0. .....0.....1........0..... 1.....1........0 .... 0..... 0
05C ...........0.....0. ..... 0.....1........0..... 1.....1........1 .... 0..... 0
060 ...........0.....0. .....0.....1........1..... 0.....0........0 .... 0..... 0
064 ...........0.....0. .....0.....1........1..... 0.....0........1 .... 0..... 0
068 ...........0.....0. .....0.....1........1..... 0.....1........0 .... 0..... 0
06C ...........0.....0. .....0.....1........1..... 0.....1........1 .... 0..... 0
070 ...........0.....0. .....0.....1........1..... 1.....0........0 .... 0..... 0
074 ...........0.....0. .....0.....1........1..... 1.....0........1 .... 0..... 0
078 ...........0.....0. .....0.....1........1..... 1.....1........0 .... 0..... 0
07C ...........0.....0. .....0.....1........1..... 1.....1........1 .... 0..... 0

8 Documentation Number PIOC2595 Manual
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH [phone] -- FAX [phone]
SW1:.........1.....2 . ..... 3.....4........5..... 6.....7........8 ....X.....X
Addr.: .....A9.. A8 . ...A7...A6.....A5...A4...A3.....A2 ..A1...A0
Weight:.....2.....1 . ..... 8.....4........2..... 1.....8........4 .... 2..... 1
080 ...........0.....0. .....1.....0........0..... 0.....0........0 .... 0..... 0
084 ...........0.....0. .....1.....0........0..... 0.....0........1 .... 0..... 0
088 ...........0.....0. .....1.....0........0..... 0.....1........0 .... 0..... 0
08C ...........0.....0. .....1.....0........0..... 0.....1........1 .... 0..... 0
090 ...........0.....0. .....1.....0........0..... 1.....0........0 .... 0..... 0
094 ...........0.....0. .....1.....0........0..... 1.....0........1 .... 0..... 0
098 ...........0.....0. .....1.....0........0..... 1.....1........0 .... 0..... 0
09C ...........0.....0. .....1.....0........0..... 1.....1........1 .... 0..... 0
0A0 ...........0.....0. ..... 1.....0........1..... 0.....0........0 .... 0..... 0
0A4 ...........0.....0. ..... 1.....0........1..... 0.....0........1 .... 0..... 0
0A8 ...........0.....0. ..... 1.....0........1..... 0.....1........1 .... 0..... 0
0AC...........0.....0. .....1.....0........1..... 0.....1........1 .... 0..... 0
0B0 ...........0.....0. ..... 1.....0........1..... 1.....0........0 .... 0..... 0
0B4 ...........0.....0. ..... 1.....0........1..... 1.....0........1 .... 0..... 0
0B8 ...........0.....0. ..... 1.....0........1..... 1.....1........0 .... 0..... 0
0BC...........0.....0. .....1.....0........1..... 1.....1........1 .... 0..... 0
0C0 ...........0.....0. .....1.....1........0..... 0.....0........0 .... 0..... 0
0C4 ...........0.....0. .....1.....1........0..... 0.....0........1 .... 0..... 0
0C8 ...........0.....0. .....1.....1........0..... 0.....1........0 .... 0..... 0
0CC...........0.....0. ..... 1.....1........0..... 0.....1........1 .... 0.....0
0D0 ...........0.....0. .....1.....1........0..... 1.....0........0 .... 0..... 0
0D4 ...........0.....0. .....1.....1........0..... 1.....0........1 .... 0..... 0
0D8 ...........0.....0. .....1.....1........0..... 1.....1........0 .... 0..... 0
0DC...........0.....0. ..... 1.....1........0..... 1.....1........1 .... 0.....0
0E0 ...........0.....0. ..... 1.....1........1..... 0.....0........0 .... 0..... 0
0E4 ...........0.....0. ..... 1.....1........1..... 0.....0........1 .... 0..... 0
0E8 ...........0.....0. ..... 1.....1........1..... 0.....1........0 .... 0..... 0
0EC...........0.....0. .....1.....1........1..... 0.....1........1 .... 0..... 0
0F0 ...........0.....0. .....1.....1........1..... 1.....0........0 .... 0..... 0
0F4 ...........0.....0. .....1.....1........1..... 1.....0........1 .... 0..... 0
0F8 ...........0.....0. .....1.....1........1..... 1.....1........0 .... 0..... 0
0FC...........0.....0. .....1.....1........1..... 1.....1........1 .... 0..... 0

Documentation Number PIOC2595 Manual 9
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH [phone] -- FAX [phone]
SW1:.........1.....2 . ..... 3.....4........5..... 6.....7........8 ....X.....X
Addr.: .....A9.. A8 . ...A7...A6.....A5...A4...A3.....A2 ..A1...A0
Weight:.....2.....1 . ..... 8.....4........2..... 1.....8........4 .... 2..... 1
100 ...........0.....1. .....0.....0........0..... 0.....0........0 .... 0..... 0
104 ...........0.....1. .....0.....0........0..... 0.....0........1 .... 0..... 0
108 ...........0.....1. .....0.....0........0..... 0.....1........0 .... 0..... 0
10C ...........0.....1. .....0.....0........0..... 0.....1........1 .... 0..... 0
110 ...........0.....1. .....0.....0........0..... 1.....0........0 .... 0..... 0
114 ...........0.....1. .....0.....0........0..... 1.....0........1 .... 0..... 0
118 ...........0.....1. .....0.....0........0..... 1.....1........0 .... 0..... 0
11C ...........0.....1. .....0.....0........0..... 1.....1........1 .... 0..... 0
120 ...........0.....1. .....0.....0........1..... 0.....0........0 .... 0..... 0
124 ...........0.....1. .....0.....0........1..... 0.....0........1 .... 0..... 0
128 ...........0.....1. .....0.....0........1..... 0.....1........0 .... 0..... 0
12C ...........0.....1. .....0.....0........1..... 0.....1........1 .... 0..... 0
130 ...........0.....1. .....0.....0........1..... 1.....0........0 .... 0..... 0
134 ...........0.....1. .....0.....0........1..... 1.....0........1 .... 0..... 0
138 ...........0.....1. .....0.....0........1..... 1.....1........0 .... 0..... 0
13C ...........0.....1. .....0.....0........1..... 1.....1........1 .... 0..... 0
140 ...........0.....1. .....0.....1........0..... 0.....0........0 .... 0..... 0
144 ...........0.....1. .....0.....1........0..... 0.....0........1 .... 0..... 0
148 ...........0.....1. .....0.....1........0..... 0.....1........0 .... 0..... 0
14C ...........0.....1. .....0.....1........0..... 0.....1........1 .... 0..... 0
150 ...........0.....1. .....0.....1........0..... 1.....0........0 .... 0..... 0
154 ...........0.....1. .....0.....1........0..... 1.....0........1 .... 0..... 0
158 ...........0.....1. .....0.....1........0..... 1.....1........0 .... 0..... 0
15C ...........0.....1. .....0.....1........0..... 1.....1........1 .... 0..... 0
160 ...........0.....1. .....0.....1........1..... 0.....0........0 .... 0..... 0
164 ...........0.....1. .....0.....1........1..... 0.....0........1 .... 0..... 0
168 ...........0.....1. .....0.....1........1..... 0.....1........0 .... 0..... 0
16C ...........0.....1. .....0.....1........1..... 0.....1........1 .... 0..... 0
170 ...........0.....1. .....0.....1........1..... 1.....0........0 .... 0..... 0
174 ...........0.....1. .....0.....1........1..... 1.....0........1 .... 0..... 0
178 ...........0.....1. .....0.....1........1..... 1.....1........0 .... 0..... 0
17C ...........0.....1. .....0.....1........1..... 1.....1........1 .... 0..... 0

10 Documentation Number PIOC2595 Manual
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH [phone] -- FAX [phone]
SW1:.........1.....2 . ..... 3.....4........5..... 6.....7........8 ....X.....X
Addr.: .....A9.. A8 . ...A7...A6.....A5...A4...A3.....A2 ..A1...A0
Weight:.....2.....1 . ..... 8.....4........2..... 1.....8........4 .... 2..... 1
180 ...........0.....1. .....1.....0........0..... 0.....0........0 .... 0..... 0
184 ...........0.....1. .....1.....0........0..... 0.....0........1 .... 0..... 0
188 ...........0.....1. .....1.....0........0..... 0.....1........0 .... 0..... 0
18C ...........0.....1. .....1.....0........0..... 0.....1........1 .... 0..... 0
190 ...........0.....1. .....1.....0........0..... 1.....0........0 .... 0..... 0
194 ...........0.....1. .....1.....0........0..... 1.....0........1 .... 0..... 0
198 ...........0.....1. .....1.....0........0..... 1.....1........0 .... 0..... 0
19C ...........0.....1. .....1.....0........0..... 1.....1........1 .... 0..... 0
1A0 ...........0.....1. ..... 1.....0........1..... 0.....0........0 .... 0..... 0
1A4 ...........0.....1. ..... 1.....0........1..... 0.....0........1 .... 0..... 0
1A8 ...........0.....1. ..... 1.....0........1..... 0.....1........0 .... 0..... 0
1AC...........0.....1. .....1.....0........1..... 0.....1........1 .... 0..... 0
1B0 ...........0.....1. ..... 1.....0........1..... 1.....0........0 .... 0..... 0
1B4 ...........0.....1. ..... 1.....0........1..... 1.....0........1 .... 0..... 0
1B8 ...........0.....1. ..... 1.....0........1..... 1.....1........0 .... 0..... 0
1BC...........0.....1. .....1.....0........1..... 1.....1........1 .... 0..... 0
1C0 ...........0.....1. .....1.....1........0..... 0.....0........0 .... 0..... 0
1C4 ...........0.....1. .....1.....1........0..... 0.....0........1 .... 0..... 0
1C8 ...........0.....1. .....1.....1........0..... 0.....1........0 .... 0..... 0
1CC...........0.....1. ..... 1.....1........0..... 0.....1........1 .... 0.....0
1D0 ...........0.....1. .....1.....1........0..... 1.....0........0 .... 0..... 0
1D4 ...........0.....1. .....1.....1........0..... 1.....0........1 .... 0..... 0
1D8 ...........0.....1. .....1.....1........0..... 1.....1........0 .... 0..... 0
1DC...........0.....1. ..... 1.....1........0..... 1.....1........1 .... 0.....0
1E0 ...........0.....1. ..... 1.....1........1..... 0.....0........0 .... 0..... 0
1E4 ...........0.....1. ..... 1.....1........1..... 0.....0........1 .... 0..... 0
1E8 ...........0.....1. ..... 1.....1........1..... 0.....1........0 .... 0..... 0
1EC...........0.....1. .....1.....1........1..... 0.....1........1 .... 0..... 0
1F0 ...........0.....1. .....1.....1........1..... 1.....0........0 .... 0..... 0
1F4 ...........0.....1. .....1.....1........1..... 1.....0........1 .... 0..... 0
1F8 ...........0.....1. .....1.....1........1..... 1.....1........0 .... 0..... 0
1FC...........0.....1. .....1.....1........1..... 1.....1........1 .... 0..... 0

Documentation Number PIOC2595 Manual 11
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH [phone] -- FAX [phone]
SW1:.........1.....2 . ..... 3.....4........5..... 6.....7........8 ....X.....X
Addr.: .....A9.. A8 . ...A7...A6.....A5...A4...A3.....A2 ..A1...A0
Weight:.....2.....1 . ..... 8.....4........2..... 1.....8........4 .... 2..... 1
200 ...........1.....0. .....0.....0........0..... 0.....0........0 .... 0..... 0
204 ...........1.....0. .....0.....0........0..... 0.....0........1 .... 0..... 0
208 ...........1.....0. .....0.....0........0..... 0.....1........0 .... 0..... 0
20C ...........1.....0. .....0.....0........0..... 0.....1........1 .... 0..... 0
210 ...........1.....0. .....0.....0........0..... 1.....0........0 .... 0..... 0
214 ...........1.....0. .....0.....0........0..... 1.....0........1 .... 0..... 0
218 ...........1.....0. .....0.....0........0..... 1.....1........0 .... 0..... 0
21C ...........1.....0. .....0.....0........0..... 1.....1........1 .... 0..... 0
220 ...........1.....0. .....0.....0........1..... 0.....0........0 .... 0..... 0
224 ...........1.....0. .....0.....0........1..... 0.....0........1 .... 0..... 0
228 ...........1.....0. .....0.....0........1..... 0.....1........0 .... 0..... 0
22C ...........1.....0. .....0.....0........1..... 0.....1........1 .... 0..... 0
230 ...........1.....0. .....0.....0........1..... 1.....0........0 .... 0..... 0
234 ...........1.....0. .....0.....0........1..... 1.....0........1 .... 0..... 0
238 ...........1.....0. .....0.....0........1..... 1.....1........0 .... 0..... 0
23C ...........1.....0. .....0.....0........1..... 1.....1........1 .... 0..... 0
240 ...........1.....0. .....0.....1........0..... 0.....0........0 .... 0..... 0
244 ...........1.....0. .....0.....1........0..... 0.....0........1 .... 0..... 0
248 ...........1.....0. .....0.....1........0..... 0.....1........0 .... 0..... 0
24C ...........1.....0. .....0.....1........0..... 0.....1........1 .... 0..... 0
250 ...........1.....0. .....0.....1........0..... 1.....0........0 .... 0..... 0
254 ...........1.....0. .....0.....1........0..... 1.....0........1 .... 0..... 0
258 ...........1.....0. .....0.....1........0..... 1.....1........0 .... 0..... 0
25C ...........1.....0. .....0.....1........0..... 1.....1........1 .... 0..... 0
260 ...........1.....0. .....0.....1........1..... 0.....0........0 .... 0..... 0
264 ...........1.....0. .....0.....1........1..... 0.....0........1 .... 0..... 0
268 ...........1.....0. .....0.....1........1..... 0.....1........0 .... 0..... 0
26C ...........1.....0. .....0.....1........1..... 0.....1........1 .... 0..... 0
270 ...........1.....0. .....0.....1........1..... 1.....0........0 .... 0..... 0
274 ...........1.....0. .....0.....1........1..... 1.....0........1 .... 0..... 0
278*...........1.....0. ..... 0.....1........1..... 1.....1........0 .... 0..... 0
27C ...........1.....0. .....0.....1........1..... 1.....1........1 .... 0..... 0

12 Documentation Number PIOC2595 Manual
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH [phone] -- FAX [phone]
SW1:.........1.....2 . ..... 3.....4........5..... 6.....7........8 ....X.....X
Addr.: .....A9.. A8 . ...A7...A6.....A5...A4...A3.....A2 ..A1...A0
Weight:.....2.....1 . ..... 8.....4........2..... 1.....8........4 .... 2..... 1
280 ...........1.....0. .....1.....0........0..... 0.....0........0 .... 0..... 0
284 ...........1.....0. .....1.....0........0..... 0.....0........1 .... 0..... 0
288 ...........1.....0. .....1.....0........0..... 0.....1........0 .... 0..... 0
28C ...........1.....0. .....1.....0........0..... 0.....1........1 .... 0..... 0
290 ...........1.....0. .....1.....0........0..... 1.....0........0 .... 0..... 0
294 ...........1.....0. .....1.....0........0..... 1.....0........1 .... 0..... 0
298 ...........1.....0. .....1.....0........0..... 1.....1........0 .... 0..... 0
29C ...........1.....0. .....1.....0........0..... 1.....1........1 .... 0..... 0
2A0 ...........1.....0. ..... 1.....0........1..... 0.....0........0 .... 0..... 0
2A4 ...........1.....0. ..... 1.....0........1..... 0.....0........1 .... 0..... 0
2A8 ...........1.....0. ..... 1.....0........1..... 0.....1........0 .... 0..... 0
2AC...........1.....0. .....1.....0........1..... 0.....1........1 .... 0..... 0
2B0 ...........1.....0. ..... 1.....0........1..... 1.....0........0 .... 0..... 0
2B4 ...........1.....0. ..... 1.....0........1..... 1.....0........1 .... 0..... 0
2B8 ...........1.....0. ..... 1.....0........1..... 1.....1........0 .... 0..... 0
2BC...........1.....0. .....1.....0........1..... 1.....1........1 .... 0..... 0
2C0 ...........1.....0. .....1.....1........0..... 0.....0........0 .... 0..... 0
2C4 ...........1.....0. .....1.....1........0..... 0.....0........1 .... 0..... 0
2C8 ...........1.....0. .....1.....1........0..... 0.....1........0 .... 0..... 0
2CC...........1.....0. ..... 1.....1........0..... 0.....1........1 .... 0.....0
2D0 ...........1.....0. .....1.....1........0..... 1.....0........0 .... 0..... 0
2D4 ...........1.....0. .....1.....1........0..... 1.....0........1 .... 0..... 0
2D8 ...........1.....0. .....1.....1........0..... 1.....1........0 .... 0..... 0
2DC...........1.....0. ..... 1.....1........0..... 1.....1........1 .... 0.....0
2E0 ...........1.....0. ..... 1.....1........1..... 0.....0........0 .... 0..... 0
2E4 ...........1.....0. ..... 1.....1........1..... 0.....0........1 .... 0..... 0
2E8 ...........1.....0. ..... 1.....1........1..... 0.....1........0 .... 0..... 0
2EC...........1.....0. .....1.....1........1..... 0.....1........1 .... 0..... 0
2F0 ...........1.....0. .....1.....1........1..... 1.....0........0 .... 0..... 0
2F4 ...........1.....0. .....1.....1........1..... 1.....0........1 .... 0..... 0
2F8 ...........1.....0. .....1.....1........1..... 1.....1........0 .... 0..... 0
2FC...........1.....0. .....1.....1........1..... 1.....1........1 .... 0..... 0

Documentation Number PIOC2595 Manual 13
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH [phone] -- FAX [phone]
SW1:.........1.....2 . ..... 3.....4........5..... 6.....7........8 ....X.....X
Addr.: .....A9.. A8 . ...A7...A6.....A5...A4...A3.....A2 ..A1...A0
Weight:.....2.....1 . ..... 8.....4........2..... 1.....8........4 .... 2..... 1
300 ...........1.....1. .....0.....0........0..... 0.....0........0 .... 0..... 0
304 ...........1.....1. .....0.....0........0..... 0.....0........1 .... 0..... 0
308 ...........1.....1. .....0.....0........0..... 0.....1........0 .... 0..... 0
30C ...........1.....1. .....0.....0........0..... 0.....1........1 .... 0..... 0
310 ...........1.....1. .....0.....0........0..... 1.....0........0 .... 0..... 0
314 ...........1.....1. .....0.....0........0..... 1.....0........1 .... 0..... 0
318 ...........1.....1. .....0.....0........0..... 1.....1........0 .... 0..... 0
31C ...........1.....1. .....0.....0........0..... 1.....1........1 .... 0..... 0
320 ...........1.....1. .....0.....0........1..... 0.....0........0 .... 0..... 0
324 ...........1.....1. .....0.....0........1..... 0.....0........1 .... 0..... 0
328 ...........1.....1. .....0.....0........1..... 0.....1........0 .... 0..... 0
32C ...........1.....1. .....0.....0........1..... 0.....1........1 .... 0..... 0
330 ...........1.....1. .....0.....0........1..... 1.....0........0 .... 0..... 0
334 ...........1.....1. .....0.....0........1..... 1.....0........1 .... 0..... 0
338 ...........1.....1. .....0.....0........1..... 1.....1........0 .... 0..... 0
33C ...........1.....1. .....0.....0........1..... 1.....1........1 .... 0..... 0
340 ...........1.....1. .....0.....1........0..... 0.....0........0 .... 0..... 0
344 ...........1.....1. .....0.....1........0..... 0.....0........1 .... 0..... 0
348 ...........1.....1. .....0.....1........0..... 0.....1........0 .... 0..... 0
34C ...........1.....1. .....0.....1........0..... 0.....1........1 .... 0..... 0
350 ...........1.....1. .....0.....1........0..... 1.....0........0 .... 0..... 0
354 ...........1.....1. .....0.....1........0..... 1.....0........1 .... 0..... 0
358 ...........1.....1. .....0.....1........0..... 1.....1........0 .... 0..... 0
35C ...........1.....1. .....0.....1........0..... 1.....1........1 .... 0..... 0
360 ...........1.....1. .....0.....1........1..... 0.....0........0 .... 0..... 0
364 ...........1.....1. .....0.....1........1..... 0.....0........1 .... 0..... 0
368 ...........1.....1. .....0.....1........1..... 0.....1........0 .... 0..... 0
36C ...........1.....1. .....0.....1........1..... 0.....1........1 .... 0..... 0
370 ...........1.....1. .....0.....1........1..... 1.....0........0 .... 0..... 0
374 ...........1.....1. .....0.....1........1..... 1.....0........1 .... 0..... 0
378*...........1.....1. ..... 0.....1........1..... 1.....1........0 .... 0..... 0
37C ...........1.....1. .....0.....1........1..... 1.....1........1 .... 0..... 0

14 Documentation Number PIOC2595 Manual
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH [phone] -- FAX [phone]
SW1:.........1.....2 . ..... 3.....4........5..... 6.....7........8 ....X.....X
Addr.: .....A9.. A8 . ...A7...A6.....A5...A4...A3.....A2 ..A1...A0
Weight:.....2.....1 . ..... 8.....4........2..... 1.....8........4 .... 2..... 1
380 ...........1.....1. .....1.....0........0..... 0.....0........0 .... 0..... 0
384 ...........1.....1. .....1.....0........0..... 0.....0........1 .... 0..... 0
388 ...........1.....1. .....1.....0........0..... 0.....1........0 .... 0..... 0
38C ...........1.....1. .....1.....0........0..... 0.....1........1 .... 0..... 0
390 ...........1.....1. .....1.....0........0..... 1.....0........0 .... 0..... 0
394 ...........1.....1. .....1.....0........0..... 1.....0........1 .... 0..... 0
398 ...........1.....1. .....1.....0........0..... 1.....1........0 .... 0..... 0
39C ...........1.....1. .....1.....0........0..... 1.....1........1 .... 0..... 0
3A0 ...........1.....1. ..... 1.....0........1..... 0.....0........0 .... 0..... 0
3A4 ...........1.....1. ..... 1.....0........1..... 0.....0........1 .... 0..... 0
3A8 ...........1.....1. ..... 1.....0........1..... 0.....1........0 .... 0..... 0
3AC...........1.....1. .....1.....0........1..... 0.....1........1 .... 0..... 0
3B0 ...........1.....1. ..... 1.....0........1..... 1.....0........0 .... 0..... 0
3B4 ...........1.....1. ..... 1.....0........1..... 1.....0........1 .... 0..... 0
3B8 ...........1.....1. ..... 1.....0........1..... 1.....1........0 .... 0..... 0
3BC*..........1.....1. ..... 1.....0........1..... 1.....1........1 .... 0..... 0
3C0 ...........1.....1. .....1.....1........0..... 0.....0........0 .... 0..... 0
3C4 ...........1.....1. .....1.....1........0..... 0.....0........1 .... 0..... 0
3C8 ...........1.....1. .....1.....1........0..... 0.....1........0 .... 0..... 0
3CC...........1.....1. ..... 1.....1........0..... 0.....1........1 .... 0.....0
3D0 ...........1.....1. .....1.....1........0..... 1.....0........0 .... 0..... 0
3D4 ...........1.....1. .....1.....1........0..... 1.....0........1 .... 0..... 0
3D8 ...........1.....1. .....1.....1........0..... 1.....1........0 .... 0..... 0
3DC...........1.....1. ..... 1.....1........0..... 1.....1........1 .... 0.....0
3E0 ...........1.....1. ..... 1.....1........1..... 0.....0........0 .... 0..... 0
3E4 ...........1.....1. ..... 1.....1........1..... 0.....0........1 .... 0..... 0
3E8 ...........1.....1. ..... 1.....1........1..... 0.....1........0 .... 0..... 0
3EC...........1.....1. .....1.....1........1..... 0.....1........1 .... 0..... 0
3F0 ...........1.....1. .....1.....1........1..... 1.....0........0 .... 0..... 0
3F4 ...........1.....1. .....1.....1........1..... 1.....0........1 .... 0..... 0
3F8 ...........1.....1. .....1.....1........1..... 1.....1........0 .... 0..... 0
3FC...........1.....1. .....1.....1........1..... 1.....1........1 .... 0..... 0

Documentation Number PIOC2595 Manual 15
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH [phone] -- FAX [phone]
NOTE 1: The addresses marked with an "*" are the addresses
normally associated with LPT1 and LPT2. 378 (and sometimes
3BCh) is used as LPT1 and 278h is usually used with LPT2.
NOTE 2: The last two bits (A0 and A1), marked with an "X" on
SW1, are not used.
NOTE 3: A "1" indicates that the switch is ON and a "0" indicates
that the switch is OFF.