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Post by RaymondDay on Oct 7, 2005 16:59:14 GMT -5
Jeff Ledger
You know on your interface were you use the MAX233ACPP.
The C1+, C1- V+ and C2+, C2- and V- take 5 volts to 10 volts. "5V to +10V voltage doubler and +10V to -10V Voltage Inverter. With out 1uf Cap on them I don't think it's doing the voltage right. So a long RS232 cord my not work with this one then.
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Post by Jeff Ledger on Oct 7, 2005 21:25:34 GMT -5
You're right, this might cause issues with longer cables. I need to add this.
Jeff
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Post by RaymondDay on Nov 10, 2005 12:29:22 GMT -5
It looks like the 7404 interface only works at 1200 baud. Any one test it past 1200 baud?
I don't think it works good with a long cable ether. I used one with a 14 foot cable. I got on Q-Link but after typing just 2 lines in people connection it stopped so when I typed and pressed RETURN nothing comes back were your text shows up.
My guess is there was to many errors. It don't show them but like Jim said if you get to many it will disconnect you.
This board now works good. A trace I found was not connected on the board. I solder a wire were the trace connected. Now it works very good. I even use 2 RS232 cables together that made about 20 feet long. It works on Q-Link very good now. Just the 06 type chip in it.
Niedobry on Q-Link made this board. He does a good job making them.
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Post by henrik51 on Nov 10, 2005 12:42:45 GMT -5
My favorite is the MAX233 interface. It actually comes close to +10/-10 volts for the RS232 signals, which will last a long ways down a cable.
I fixed up the diagram on this message board, as some bridge wires are missing. I will try and upload this weekend. That is what we used for the VCF demo, and I had 25 foot cables between the PC and the commies.
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Post by discmaster1 on Jan 7, 2006 18:33:45 GMT -5
I have a question on this rs232 setup for accessing Q-Link Reloaded directly from my 128D. I hope some of you might be able to explain this to me.
If I want to connect to Q-Link via my real C128D I need this Lantronix device and a rs232 adapter like CMD's tuerbo232?
The way it works is the C128d connects to the RS232, the RS232 to the Lantronix, and the Lantronix to my router via ethernet cable. Is this correct? If so, I'll try to snag a Lantronix device and a CMD Turbo232 cart.
Is there anything else I'll need other than the two devices mentioned above? Also, is ther eany difference between the Lantronix 10 and 100?
Thanks for any help. John
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Post by Golan Klinger on Jan 9, 2006 13:05:53 GMT -5
If I want to connect to Q-Link via my real C128D I need this Lantronix device and a rs232 adapter like CMD's tuerbo232? To connect your 128D (or a 128 or a 64 etc.) you need an RS232 adaptor of some sort and a device to bridge serial to ethernet. For that job you can use a dedicated terminal server like the Lantronix UDS-10/UDS-100 or you can use a PC (provided it has both an RS-232 port and an ethernet card) running TCPSER/TCPSERj or BBS Server. The 10 and 100 refer to the speed capabilities of the ethernet interface, the UDS-10 being capable of 10 megabit and the UDS-100 being capable of 10 or 100 megabit. Both are considerably faster than a serial interface and, most likely, your network connection so if you're buying one, buy whichever is cheapest.
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Post by discmaster1 on Jan 10, 2006 9:53:08 GMT -5
Ok, I bought a uds-10 unit. I have a rs232 device at home for the C64. I have a few quick questions that I'm hoping to get answers to.
1. Does a standard RS232 adapter plug into the cartridge port? I'm at work and can't remember if the adpater was a cartridge port type card. I never really used it before and got it in a auction that I won years ago. It was a bonus item in a C128 collection I won.
2. What type of serial cable do I need and how long or short should the cable be? What I mean is what type of ends does the serial cable need to have a RS232 adapter connect to the Lantronix uds-10? I think the rs232 has a female 25 pin port. I plan on going to Compusa for lunch and picking up a cable, I'd just like to know what adapter ends are needed on the cable to conenct the lantronix to the rs232. Also, is 5 or 6 feet too long? Should I try to get a 3 foot cable if I can find one?
Thanks in advance for any help.
John
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Post by thurstan on Feb 12, 2006 14:36:58 GMT -5
I have a commodore modem I picked up off ebay recently. Is it possible to hack or mod this to make a rs232 interface or something?
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Post by Golan Klinger on Feb 17, 2006 2:39:52 GMT -5
I have a commodore modem I picked up off ebay recently. Is it possible to hack or mod this to make a rs232 interface or something? I've never heard of a way to make a modem into an RS-232 adaptor although you could use the user port connector if you were building your own. There is another way that you might be able to use that modem to connect your 64 to the Internet. Take a look at this thread jledger.proboards19.com/index.cgi?board=qlink&action=display&thread=1128221954 for more information.
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Post by thurstan on Feb 17, 2006 11:53:01 GMT -5
will try the modem to modem route, seems to be the easiest thing to do. Thought i had seen the back of modems in my PC!
Oh just seen a USB 56k modem, do you think this will do the trick and provide voltage to the line?
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Post by Golan Klinger on Feb 17, 2006 16:28:43 GMT -5
Oh just seen a USB 56k modem, do you think this will do the trick and provide voltage to the line? I have no idea. It depends on the modem and the only way to know for sure is through trial and error. Keep in mind that you'll be limited by the speed of the modem attached to the 64. All software should work because you're using a real modem but it won't be fast which is a good thing if you're trying to recreate the experience of telecommunicating with a real 64. Using a cheap and readily available modem is definitely the easiest way to get a 64 on the net.
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steve
New Member
Posts: 1
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Post by steve on Aug 24, 2006 1:27:50 GMT -5
I recently found plans for a very simply interface requiring only a Commodore userport, a Max233, and 25 pin serial connector, but alas don't seem to be able to find them again. Does anyone know of schematics for such an interface?
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Post by MadModder on Aug 24, 2006 5:51:45 GMT -5
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Post by gmoon on May 19, 2007 6:28:34 GMT -5
It's time to build one o' these puppies.
But many schematic images are missing from this thread (perhaps related to the domain name change, Jeff?)
Anyway to restore this topic? It's quite useful.
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Post by Jeff Ledger on May 19, 2007 9:30:23 GMT -5
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