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> > I've got a kind of strange problem. Maybe someone can help with the > > answer. I have a TP720 (ok, I know it is notthe 720 list, but there is > > no 720 list! this will probably apply anyway) > > Maybe, maybe not. The 720 is a wierd bird. For example, it's a > micro-channel machine (not ISA) and so there are a bunch of d*mn POS > registers (love that name) that govern whether the devices (including > the PCMCIA controller) appear on the system bus. My TP720 tech ref > manual says that the enable bit in the POS register for PCMCIA is zero > on power up, meaning that the PCMCIA subsystem is *disabled* by > default. That makes sense. > > and a Megahertz modem. The > > modem works fine if I 1st go into Windows and access Terminal. I can > > then go back to DOS and run a DOS based terminal program or access the > > modem. If I don't access the modem through Windows first, I can't use > > the modem. > > @begin(theory) > > You didn't say what kind of drivers you have installed under DOS, but > my guess is that of the Windows drivers is turning on the PCMCIA > system for you. If so, then it is indeed a TP720 specific problem. I have all of the PCMCIA socket software loading in the CONFIG, and I run the Megahertz setup program to tell the tp that I have the MHZ modem in slot 2, and want to set it up as COM2. > In addition to the POS registers, the PCMCIA subsystem also requires > its own initialization, say, to map a modem card into the i/o bus as a > COM2 port. Again, you might have a Windows driver that will do this > for you, whereas it wouldn't happen under DOS alone. Depending on > what PCMCIA controller chip the TP720 uses (the tech ref manual is > silent on the subject) this problem might or might not be specific to > the TP720. I think that the Megahertz driver should initialize the PCMCIA port. Here's something that left me scratching my head: After I run the Megahertz DOS executable, I thought I'd try to set-up the port with the mode command, so my autoexec looks like this: @ECHO OFF PROMPT etc. MEGAHZ s2c2 (for slot 2, port 2) MODE COM2:9600,8,n,1 PAUSE On that mode command, I get an error that says that the port is invalid, BUT if I control-c out at this point (note the pause) and then type the same command from dos (the mode command) it works perfectly! The other strange thing, is that I tried using a DOS communication program again last night without going into Windows 1st and it worked flawlessly. Maybe I somehow "turned on" the PCMCIA subsystem permanently now? Man, this stuff is flaky. - Jon