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#1
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Parallel Printer Tap?
Hi Group,
Does anyone know of a device that allows you to tap into a parallel printer line and receive the same data into a serial port, while letting it still print to the parallel printer? B&B Electronics does have printer taps and parallel to serial converters but the setup would be extremely clumsy. I'm guessing there must be a "box" out there that just fits into the line and then "tees" off to a serial port. TIA, Jeff |
#2
Posted to alt.electronics
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Parallel Printer Tap?
On 2006-03-07, Jeff Caspari wrote:
Hi Group, Does anyone know of a device that allows you to tap into a parallel printer line and receive the same data into a serial port, while letting it still print to the parallel printer? B&B Electronics does have printer taps and parallel to serial converters but the setup would be extremely clumsy. I'm guessing there must be a "box" out there that just fits into the line and then "tees" off to a serial port. There isn't. Parallel is potentially much faster than serial, you can't reliably intercept and pass parallel traffic by merely listening. That said, I think you only need to connecte the devices in parallel but intercept the ack signal from the printer and or it with the ack from the P=S and feed that to the printing computer's ack pin. This will slow the setup to the speed of the slowest device. Can't this task be done using software? mos operating systems let you define a printer as being connected to a serial port ... connect the printer to the "intercept" PC and connect it in place of a serial printer useing a null modem cable (or a network printer share if you can handle the complexity) Bye. Jasen |
#3
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Parallel Printer Tap?
On Tue, 07 Mar 2006 09:28:18 -0000, Jasen Betts
wrote: On 2006-03-07, Jeff Caspari wrote: Hi Group, Does anyone know of a device that allows you to tap into a parallel printer line and receive the same data into a serial port, while letting it still print to the parallel printer? B&B Electronics does have printer taps and parallel to serial converters but the setup would be extremely clumsy. I'm guessing there must be a "box" out there that just fits into the line and then "tees" off to a serial port. There isn't. Parallel is potentially much faster than serial, you can't reliably intercept and pass parallel traffic by merely listening. --- That's not what he's trying to do. He's already found a parallel port-to-serial port converter, but what he wants is one with two parallel port connectors wired straight-through, and the parallel-to serial converter wired to their junctions and its output going to a serial port connector, all in the same box. -- John Fields Professional Circuit Designer |
#4
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Parallel Printer Tap?
John,
With help, I was able to locate a device that seems to fit the bill. I have spoken with the owner and it looks like what I need. See a description at: http://www.imeg.com/jadtech/c100spec.htm Thank you, Jeff "John Fields" wrote in message ... On Tue, 07 Mar 2006 09:28:18 -0000, Jasen Betts wrote: On 2006-03-07, Jeff Caspari wrote: Hi Group, Does anyone know of a device that allows you to tap into a parallel printer line and receive the same data into a serial port, while letting it still print to the parallel printer? B&B Electronics does have printer taps and parallel to serial converters but the setup would be extremely clumsy. I'm guessing there must be a "box" out there that just fits into the line and then "tees" off to a serial port. There isn't. Parallel is potentially much faster than serial, you can't reliably intercept and pass parallel traffic by merely listening. --- That's not what he's trying to do. He's already found a parallel port-to-serial port converter, but what he wants is one with two parallel port connectors wired straight-through, and the parallel-to serial converter wired to their junctions and its output going to a serial port connector, all in the same box. -- John Fields Professional Circuit Designer |
#5
Posted to alt.electronics
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Parallel Printer Tap?
On 2006-03-07, John Fields wrote:
There isn't. Parallel is potentially much faster than serial, you can't reliably intercept and pass parallel traffic by merely listening. --- That's not what he's trying to do. He's already found a parallel port-to-serial port converter, but what he wants is one with two parallel port connectors wired straight-through, and the parallel-to serial converter wired to their junctions and its output going to a serial port connector, all in the same box. If parallel is wired straight through it won't work. the data rate on the parallel needs to be throtled to whatever the serial is capable of. Bye. Jasen |
#6
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Parallel Printer Tap?
On Wed, 08 Mar 2006 07:04:21 -0000, Jasen Betts
wrote: On 2006-03-07, John Fields wrote: There isn't. Parallel is potentially much faster than serial, you can't reliably intercept and pass parallel traffic by merely listening. --- That's not what he's trying to do. He's already found a parallel port-to-serial port converter, but what he wants is one with two parallel port connectors wired straight-through, and the parallel-to serial converter wired to their junctions and its output going to a serial port connector, all in the same box. If parallel is wired straight through it won't work. the data rate on the parallel needs to be throtled to whatever the serial is capable of. --- Wired straight through in that the printer connected to the device will see data coming from the computer's parallel port as if the device weren't there, and the computer will just think it's sending data to a slow printer. It goes without saying that the speed of the data coming from the computer will have to be restricted in order to do the parallel to serial conversion, transmit the serial data, and renew the cycle. -- John Fields Professional Circuit Designer |
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