B&B Electronics Parallel Printer Card PIOC User Manual

Parallel printer card

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Not Recommended for New Installations.

Please contact Technical Support for more information.

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 (815) 433-5100 -- FAX (815) 433-5105

Internet:

http://www.bb-elec.com

orders@bb-elec.com

support@bb-elec.com

 B&B Electronics -- Revised February 1995

Documentation Number PIOC2595 Manual

Cover Page

B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350

PH (815) 433-5100 -- FAX (815) 433-5105

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Summary of Contents for B&B Electronics Parallel Printer Card PIOC

Page 1 Not Recommended for New Installations. Please contact Technical Support for more information. Parallel Printer Card Model PIOC Documentation Number PIOC2595 This product Designed and Manufactured In Ottawa, Illinois of domestic and imported parts by B&B Electronics Mfg. Co. Inc. 707 Dayton Road -- P.O. Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 433-5105 Internet: http://www.bb-elec.com...
Page 2 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.
Page 3: Setting The Address
Table 1 - Printer Functions PIOC DB-25 Connector 18 - 25 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.
Page 4 Table 2 - DIP Switch Functions Table 3 - DIP Switch Weights Address: Weight: LPT1 (378h): LPT2 (278h): NOTE: A "1" indicates that the switch is ON and a "0"indicates that the switch is OFF. Documentation Number PIOC2595 Manual B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 433-5105 I/O Address...
Page 5 Table 4 - Hardware I/O Map of AT Class Machines Hex Address Address Function in AT Class Machines DMA controller #1 (8237A-5) 000-01F interrupt controller #1 (8259A) 020-03F timer (8254) 040-05F keyboard (8042) 060-06F NMI - non maskable interrupt & CMOS RAM 070-07F DMA page register (74LS612) 080-09F...
Page 6 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.
Page 7 Table 5 - Register Functions and Pinouts Base (378H) OUTPUT INPUT 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.
Page 8 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 ...
Page 9 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 ...
Page 10 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 ...
Page 11 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 ...
Page 12 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 ...
Page 13 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 ...
Page 14 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 ...
Page 15 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 ...
Page 16 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.

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