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Mac Forum / General / Hardware / December 2007Beige G3 / OS9: selecting internal modem
Hi everyone. Beige G3 tower, OS 9. Trying to connect two printers to the machine for a friend, to pick from in the chooser. Color SW and a 4/600. I replaced her external serial modem with the internal one that plugs onto the stock audio board, to free up the 2nd serial port. Strangely, even though the internal modem now works, and the external serial one is disconnected, I can't find where to select it. Modem cp only allows for modem or printer port, and the internal is not one of the choices in the modem list. The main problem here is that it seems that I can't deselect the serial ports for the modem, in order to free them both for the printers. How do I tell OS 9 that the internal modem is being used, and both serial ports are free for printers? Thanks, MK > Hi everyone. Beige G3 tower, OS 9. Trying to connect two printers to > the machine for a friend, to pick from in the chooser. Color SW and a [quoted text clipped - 12 lines] > Thanks, > MK It is a long time since I used a modem! however if I remember correctly the internal modem disables one of the serial ports, machines that shipped with a modem fitted had a plastic plug covering one of the serial ports. Your only options are probably to find a (RARE) Mac compatible serial card or fit a USB card and use a USB modem. Ben. > Hi everyone. Beige G3 tower, OS 9. Trying to connect two printers to > the machine for a friend, to pick from in the chooser. Color SW and a [quoted text clipped - 4 lines] > only allows for modem or printer port, and the internal is not one of the > choices in the modem list. I'm not familar with the Beige G3's modem, but you should check out if it is supported in OS9. The modems in earlier Mac's that plug into the audio board are not really modems, they are telephone line interfaces for the audio board. The software that drives them uses the Mac itself to decode and encode the data. They were dropped by MacOS 9. Geoff.  SignatureGeoffrey S. Mendelson, Jerusalem, Israel gsm@mendelson.com N3OWJ/4X1GM IL Voice: (07)-7424-1667 U.S. Voice: 1-215-821-1838 Visit my 'blog at http://geoffstechno.livejournal.com/ > I'm not familar with the Beige G3's modem, but you should check out if > it is supported in OS9. The modems in earlier Mac's that plug into the [quoted text clipped - 3 lines] > > They were dropped by MacOS 9. I had a G3 266. When the internal modem is installed, it disables one of the onboard serial ports. To get them both working, you have to physically remove the modem. Your only choice there is an external modem hooked to one of the two serial ports. There were port dividers made which acted like a glorified Y-cable (I have one that I'm going to put on eBay soon), but I'm not sure how well they work. In article <Pine.SOC.4.64.0711291428340.11031@ubunix2.acsu.buffalo.edu>, > Hi everyone. Beige G3 tower, OS 9. Trying to connect two printers to > the machine for a friend, to pick from in the chooser. Color SW and a [quoted text clipped - 12 lines] > Thanks, > MK Presuming these are both Serial printers as one expects of a Mac of that are, you can create an AppleTalk LocalTalk network. You have to obtain a little pigtail device that converts the Apple circular serial plug to a standard 4-conductor telephone wire kind of plug (RJ11). You can then daisy-chain the two printers on one cable using the little pigtail interface devices on the telephone cable. I used to do it here. Just remember that the pigtail devices have a resistor that utilizes an RJ11 plug. You daisy-chain th eprinters but the last pigtail needs that resister at theend of the chain to "terminate" the line, otherwise you may see errors and it may not work. This allows you to hang both printers off one port - the printer port. You can then use an external modem on the modem port. --- I still have an OS 9 machine but no longer hang any printers off the serial ports. I was lucky to obtain an HP that uses USB and I have a small 2-port USB card in one of the slots for that. I still have an external modem on the modem line used for occasional direct faxing tot he phone line. --- Keep in mind that if you daisy-chain the printers under an AppleTalk LocalTalk line, you will need th enecessary AppleTalk drivers for the printers. Usually printers of that vintage came with a direct serial driver and an AppleTalk driver for just such an occasion. Under the LocalTalk set up you can choose the printers in the Chooser along with any other devices that hang off the Chooser. The Color SW should have a driver for AppleTalk LocalTalk. I don't know about the others, but if it was designed for Apple-Mac serial connectiosn it *should* have a driver. There were a few that did not. > In article > <Pine.SOC.4.64.0711291428340.11031@ubunix2.acsu.buffalo.edu>, [quoted text clipped - 18 lines] > Presuming these are both Serial printers as one expects of a Mac of > that are, you can create an AppleTalk LocalTalk network. I don't think that's going to work unless the printers have an Appletalk (or whatever it's called) interface. Otherwise, it's merely two printers in parallel. There's nothing in the printers to make it unique on the Appletalk bus, so neither will know that you want it to print and not the other. The Macs can use those ports for both serial and Appletalk because they have the smarts to make them actual nodes on the Appletalk network. But on the printers, they are just serial ports. Now, maybe some of the later printers (and definitely at least some of the laserprinters) came with the Appletalk interface built in. But it would depend on the printers. For instance, the Imagewriter wasn't Appletalk ready, thought the Imagewriter II could be if the Appletalk interface board was added. Michael > I don't think that's going to work unless the printers have an Appletalk > (or whatever it's called) interface. [quoted text clipped - 14 lines] > > Michael I'm pretty sure that was done with drivers. I had a Color 2400 and an HP at one time on my chain and after the Color SW died I had an old HP Deskjet, one of th efirst, and a later 600 series color one on the chain and they worked fine. You just had to select the AppleTalk driver in the Chooser. In my case of I had these directly ported to the serial ports I selected the direct serial driver and switched between the printer and modem port to sepect which printer I wanted. Later when I went to the AppleTalk chain I did it by selecting the Appletalk driver for each printer. I could also select each printer as the default printer in the Chooser without additional changes. You COULD NOT select either printer when printing in a print menu or page set up menu, you could only print to the default printer so you had to select the preferred printer before initiating the print sequence. > > In article > > <Pine.SOC.4.64.0711291428340.11031@ubunix2.acsu.buffalo.edu>, [quoted text clipped - 18 lines] > I don't think that's going to work unless the printers have an Appletalk > (or whatever it's called) interface. The LaserWriter 4/600 is an AppleTalk (LocalTalk) printer. Color StyleWriters vary depending on model. All of them have Serial, but some have LocalTalk and/or EtherTalk either as options or standard. (LocalTalk is AppleTalk via serial cables, typically over a multidrop bus but it can be done over a point to point serial cable. EtherTalk is AppleTalk via Ethernet.) > Otherwise, it's merely two printers in parallel. There's nothing in > the printers to make it unique on the Appletalk bus, so neither will know > that you want it to print and not the other. If you have two LocalTalk printers and appropriate LocalTalk cabling (or third party PhoneNet) then you can connect two printers to a single serial port on the Mac (usually the Printer port) and pick which one you want to use with the Chooser. The AppleTalk network protocols and the Chooser allow you to select which printer you want. A single LocalTalk printer can also be connected directly to the computer with a serial cable, avoiding LocalTalk/PhoneNet wiring (usually - some were fussy about this). You can only connect one LocalTalk printer this way. If you have two Serial printers, you can't do this with a single serial port, short of getting a switch box. If you have one Serial and one LocalTalk printer, you would normally require two serial ports on the computer. In principle, you could use a single serial port and either reconnect the cables or use a switch box, together with changing the settings for the port to turn AppleTalk on and off. This would be a pain. > The Macs can use those ports for both serial and Appletalk because they > have the smarts to make them actual nodes on the Appletalk network. But > on the printers, they are just serial ports. Some printers support a simple serial connection only (e.g. monochrome StyleWriter models). Some printers support a LocalTalk connection only (e.g. the LaserWriter 4/600). Some printers can be set to operate either with a simple serial connection or a LocalTalk connection via the same port on the printer. The ImageWriter II (with AppleTalk option card installed) was an example of this: switching off the card via DIP switches restored it to being a standard serial printer. You cannot add an arbitrary serial printer to a LocalTalk network. It requires that the printer's serial port supports 230400 bps bit-synchronous mode (SDLC framing), typically using a Zilog Z8530 SCC (or equivalent), and that the printer has implemented support for the AppleTalk protocols in its firmware. A standard (simple) serial connection uses asynchronous mode to talk between the printer and computer, usually at a much lower speed, and a standard serial printer doesn't have the necessary hardware support (let alone firmware) to operate on LocalTalk. SignatureDavid Empson dempson@actrix.gen.nz In article <Pine.SOC.4.64.0711291428340.11031@ubunix2.acsu.buffalo.edu>, > The main problem here is that it seems that I can't deselect the serial > ports for the modem, in order to free them both for the printers. How do > I tell OS 9 that the internal modem is being used, and both serial ports > are free for printers? MK- If your internal modem is connecting to one of the serial ports, you may be out of luck unless a compatible serial card is available. On the chance it can be made to work the way you have it connected now, try resetting the PRAM. It is possible that the PRAM is remembering the older configuration. PRAM reset is accomplished by continuing to hold down the Command-Option-P-R keys while rebooting, until two or more "bongs" are heard. (The Apple help line once told me 5 bongs, but it may depend on the model.) Fred Hello. I am looking for a machine on the cheap to handle Tiger and Garage Band. Will a Dual 500 G4 be OK? Thanks. > Hello. I am looking for a machine on the cheap to handle Tiger and > Garage Band. Will a Dual 500 G4 be OK? Thanks. Tiger will be fine, but GarageBand could be very clunky, depending on what you do with it. Any chance you could try it before you commit? Signaturejohn mcwilliams |
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