40 lines
1.6 KiB
Plaintext
40 lines
1.6 KiB
Plaintext
AST RESEARCH TECHNICAL BULLETIN TB-0015A 9-19-84
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INCOMPATIBILITY OF COLUMBIA'S PARALLEL PORT
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Due to compatibility inquiries, tests have been conducted on
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Columbia's (DESKTOP PC model 1600) parallel port.
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The results of these tests show that Columbia parallel port is
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not directly compatible with IBM hardware standard or AST
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SuperSpool.
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Listed below are three major considerations to be aware of when
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configuring this system with an AST product.
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1. Parallel port on Columbia does a self increment. When
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an AST product with a parallel port is installed and
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addressed as LPT1, the Columbia parallel port
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increments to LPT2.
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2. SuperSpool will not function properly when output is
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directed to Columbia's parallel port. This is true
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whether the port is addressed as LPT1 or LPT2.
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3. Located on the Columbia's motherboard is the cable
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connector for a parallel port. This connection is not
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IBM plug compatible. It is a 37 position connector,
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whereas the IBM and AST parallel port connectors are 25
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position.
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To optimize usage of an AST product in this PC; 1) address AST
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board as LPT1, thereby allowing usage of SuperSpool, 2) procure
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an IBM compatible cable or modify existing cable to conform with
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IBM standards, 3) if Columbia's parallel port is to be used, do
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not direct SuperSpool to this point.
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Note: All testing and considerations are based on PC-DOS.
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