If you port to another compiler please drop me a line and let me know how it went. Some drivers only need the vector and find the other values by themselves. The first option ” 0x60 ” sets the software interrupt vector used by the driver. COM 0x60 5 0x In the example above the driver is loaded into high memory by using the command ” LH “. Obviously there is a lot of code to add if you want this to do something useful, but it will get you started.
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Network Setup – DOSBoxWiki
I had a breakthrough when I figured out that the Xircom PEBT I was using would always fail when I received a packet, but an NE clone would let me receive a packet just fine without crashing first. The packet driver API is based on software interrupts which allow it to be used from almost any crynwt language that can generate an interrupt. Software interrupts are not extremely difficult to use, but they are certainly more work than a normal function call.
Most packet drivers can be unloaded after use with the option ” -u “. Another example for the E card: It also includes the assembler code that I used to work around ‘The Xircom Problem.
PC/TCP Packet Driver Specification
Obviously there is a lot of code to add if you want this to do something useful, but it will get you started. He made the experience that packet drivers are often the same for a large number of models by the same manufacturer, so he recommends not to try finding a packet driver specific for your model number.
This page has been accessed 44, times. The first problem that I ran into was figuring out how to actually send and receive bytes using an Ethernet card.
Crgnwr will learn more about these kernels a bit further in this wiki. Reboot boot messages packet driver That’s all. My first attempts at sending packets were successful – my Linux box on the network saw my hideous first attempts at ARP.
The first place to look for a packet driver should be the installation medium that came with your card. Compile using the ‘compact’ memory model, which assumes code is in one segment but crynwg can be in multiple segments. This page was last modified on 28 Decemberat Still, not everything was perfect. The details on the packet driver spec can be found here: COM 0x60 5 0x In the example above the driver is loaded into high memory by using the command ” LH “.
Documentation is packey the form of comments interspersed in the code. Retrieved from ” http: If this gets anybody interested in Crgnwr networking and saves them from the pain and frustration I went through, it will be worth it. In the example above the driver is loaded into high memory by using the command ” LH “. This is because we are using ‘far’ pointers. This bridge had been crossed many years ago.
Navigation Main page Recent changes Random page Help. After that, I was able to send and receive packets with impunity! Interfacing to the hardware is a problem though – most of us are not trained to write device drivers, it is a difficult environment to debug in, and there are a lot of possible Ethernet cards out there. It is also cryner that you have the packet driver specification handy packey are familiar with it.
But trying to receive packets was a nightmare – if I received a packet the machine would immediately crash. It also includes some buffer management code that is used for receiving incoming data from the packet driver. Navigation menu Personal tools Log in. After a few days of debugging and some consultation with Russell Nelson at Crynwr I was able to get around the problem. Creating the packets to send down the wire in memory isn’t difficult – it requires a lot of data structures and pointers but it is well within the grasp of a good C programmer.
Networking FreeDOS – Packet driver installation – FreeDOS
Views Read View source View history. Crtnwr research and digging led me to the interrupt keyword in the compiler. The buffer management code is fairly high performance code.