Null modem transfer

Categories: Serial , null modem. Tags: serial , rs , db9 , db25 , db Author: Nicholas Watkins. A standard DB9 AT cable pinout non-null modem Originally, all serial cables were AT cables and could not connect two devices such as two computers directly. A standard pinout featuring the two most common null modem cables, DB9 and DB25 Null modem cables are still somewhat common today, having been used on many machines for a few decades.

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I was curious if anybody knows a way to connect two different computers together over a USB line and what API's exist to program this interface. I was wondering if there was an Adapter of some kind that could emulate this same behavior except for native USB protocol. That's not really what i'm interested in because the baud rate is very slow for uarts. I was looking for something with USB speeds to transfer from one computer to another that is not going over a network link such as ethernet or wifi.

However, this presents a dilemma in application areas that previously relied on legacy COM Ports for inter-PC communication. Another Alternative is to use Bluetooth which is also programmable just like a the older serial port. It has a USB on one end and an ethernet port on the other end. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. What this means is that it provides a pair of serial ports, one of which connects to the device emulation program while the other is employed by the Windows application that wants to communicate with the device.

It is a professional-grade utility that creates pairs of virtual COM ports that can be connected with a virtual null-modem. The virtual port pairs provide a communication bridge enabling data transmitted from an app at one end of the pair to be received immediately at the other end. There are both advantages and disadvantages to using paid or freeware software solutions to address serial connectivity issues. To help you decide which is better for your situation, we present this table that looks at the features of Virtual Serial Port Driver and Null-Modem Emulator com0com.

Toggle navigation Virtual Null Modem. Virtual Null-Modem Emulation. What problem can be solved with a Virtual Null Modem? Null-modem emulator by com0com There are a number of null-modem emulation software tools available.

Virtual Serial Port Driver vs. Null-modem emulator There are both advantages and disadvantages to using paid or freeware software solutions to address serial connectivity issues.

Product to compare: VSPD 9. Null-modem emulator com0com 3. Features list. Null-modem emulator com0com. Tested version. When resizing this part is extremely important - If you want to enlarge it and have it still look "right" - as in not be all blurry and crap I find using the "Nearest Neighbor" method is best. Other modes will be blurry and look like crap. Using the nearest neighbor method you can enlarge it quite a bit and it will still look clear and look like what you saw on your Amiga, minus CRT things.

Personally I'd want to enlarge anything from the Amiga, because x stuff is damn small on todays monitors. When resizing there will probably be a button for "Maintain Aspect Ratio" uncheck it because the Amiga used all sorts of messed up resolutions that were meant to be distorted.

So, I usually distort it into x using Nearest Neighbor in Paint. I've been trying to find better looking stuff for mine. Posted Wed Mar 23, pm I remember reading that Magic Workbench was discontinued and abandoned by its creator out of frustration. But a couple guys on EAB picked up the torch and starting running with their own thing, I think, and created a ton of "themes". Not sure if they are backwards compatible to WB 1.

Posted Wed Mar 23, pm Magic Workbench does not even support 1. Still, given I find a set of icons I like I do know how to put them in there. I had the super nice looking modern for desktop with high resolutions but it could still play Amiga stuff. I would go on the internet through the Amiga emulator. It was cool. I had some nice 3. I am a power user of any computer I have. But since I have the real Amiga now I've been doing what I can with that.

In some ways it's more rewarding. If I want Workbench to have a few extra colors and look a little nicer? I have to hack the thing in order to get MagicWB to work. If I want to get a screenshot? I've got to go through a thousand freeware disks, transfer it over, figure that out All these Amiga's really offer a lot of enjoyment in these other areas.

It has always been about a lot more than games with this nerd. Hacking MagicWB into 1. The C64 maybe as well I'm sure they suck, but for some reason I would love to have them.

Posted Thu Mar 24, am I hear ya. For the life of me I'm baffled as to why my current WB is set to 4 colors. I know there are some folks out there where that's all they do - tweak their WB desktops. Posted Thu Mar 24, am I don't think Commodore ever understood why users would want to mess with all that stuff.

They didn't want you to have more than 4 colors. Because Workbench is in medium resolution that's using extra pixels and they decided 4 was all they could give it and keep the multitasking happy. When you do that stuff it eats up the chip memory which is not good.

I have 8 colors on my Workbench and I have a couple programs I use for certain games that won't run because of it. Not enough memory unless I use a program and reduce the colors before running it. I've got 8mb of fast ram but it's not using that! I think most of the super sweet workbench 3. Sure, give that A mb of chip ram! Anyone feel free to post an example of some of the more impressive stuff on a real Amiga, it would be cool to see it.