howard@utcs.UUCP (Howard Lem) (04/07/85)
:: I recently purchased an IBM-PC Compatible (Tandy 1200), and would now like to add a second parallel port to it. However, I have come across the following problem, which I was unaware of before: Brief description: a) The new board is installed as LPT2: and has been strapped at base address 0278h b) This board is a Tecmar PC-Mate Captain Expansion board and includes 340k ram, a serial port (strapped for COM1:) a parallel port (the one in question) and a clock/timer. The problem: After installing the board, and running the supplied diagnostics the board checks out ok. After attaching a printer to this new port, the original port is empty, the MODE.EXE program supplied with DOS tells me that LPT1: is offline or unconnected (ok) *and* that LPT2: is the same way (not ok). Switching the printer to LPT1: and running MODE.EXE again only informs me that LPT2: is offline (correct). So I experimented. I put a printer into LPT1: and type: C> DIR >LPT1: (i get a listing on the printer) then I typed: C> DIR >LPT2: (again I get a listing on the printer) Is this right?? Shouldn't DOS inform me that the device is unavailable or something? I should let you know that this parallel port works fine in a second Tandy-1200, except that it will print data routed to LPT2: (it's proper address) as well as LPT1: (this is not right). It seems to have the opposite problem on the other machine. The only difference between the two machines is that the second one has a Tecmar Graphics Master card installed (very nice, I might add). Does any one have any suggestions for me? I apologize for the length of this, but it was necessary to explain the circumstances. I have done many other tests on the board, that I have not listed here. Please respond via net-mail, to my address below, as I am not using my own account for this posting. Thanks in advance, Brian A. Onn University of Toronto Computing Services, Erindale College {ihnp4, decvax, utzoo, cbosgd}!utcs!utcseri!onn -- ----- Howard Lem {ihnp4, decvax, cbosgd, utzoo}!utcs!howard