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