Ethernet for PCjr {WizNet}

Hardware questions and modifications

Re: Ethernet for PCjr {WizNet}

Postby Brutman » Mon Mar 06, 2017 11:19 am

Because WiFi is a bit more complicated than wired Ethernet. Getting all of the code to properly associate with access points does not look trivial. And attaching to a secured network with WPA is far more onerous.
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Re: Ethernet for PCjr {WizNet}

Postby Shaos » Mon Feb 11, 2019 10:26 pm

I came back :)

https://hackaday.io/project/163856-pcjrnet

Sorry for long absence - it took time to re-locate and settle in a new place (I moved from NY to CO during 2017 and still moving boxes around)
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Re: Ethernet for PCjr {WizNet}

Postby Trixter » Tue Feb 12, 2019 8:52 pm

Nice writeup so far!
You're all insane and trying to steal my magic bag!
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Re: Ethernet for PCjr {WizNet}

Postby Shaos » Tue Feb 12, 2019 9:52 pm

Trixter wrote:Nice writeup so far!

Thank you, I simply repeated everything from 2 years ago to make sure I don't forget to finish it in near future ;)
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Re: Ethernet for PCjr {WizNet}

Postby Shaos » Thu Feb 14, 2019 10:06 pm

This is modem that I will switch with Ethernet :)

Image

I bought it to measure dimensions and properly copy its shape...
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Re: Ethernet for PCjr {WizNet}

Postby Shaos » Sun Feb 17, 2019 1:50 pm

Current status ;)

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Re: Ethernet for PCjr {WizNet}

Postby Shaos » Sun Feb 17, 2019 3:31 pm

For user from PC it will look like this:
Code: Select all
3F8h - register MR of W5100 (indirect mode flag and auto-increment flag)
3F9h - register IDM_AR0 of W5100 (most significant byte of the address)
3FAh - register IDM_AR1 of W5100 (least significant byte of the address)
3FBh - register IDM_DR of W5100 (data register to read/write in indirect mode)
3FCh - reserved for future
3FDh - reserved for future
3FEh - reserved for future
3FFh - reserved for future

More details about W5100: https://www.wiznet.io/wp-content/uploads/wiznethome/Chip/W5100/Document/W5100_Datasheet_v1.2.7.pdf
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Re: Ethernet for PCjr {WizNet}

Postby Shaos » Wed Feb 20, 2019 11:10 pm

Fitting inside:

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Re: Ethernet for PCjr {WizNet}

Postby Brutman » Thu Feb 21, 2019 7:10 am

(I'm not getting forum notifications ... yet another thing to debug.)

The WizNet looks like it has a TCP/IP stack built in. Can it be told to just send and receive raw packets? mTCP and other existing networking software just needs the ability to send and receive raw packets; they are not designed for use with things that offload the TCP part.


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Re: Ethernet for PCjr {WizNet}

Postby Shaos » Thu Feb 21, 2019 8:21 am

It looks like newer WizNET chips can do that - this one is not
For now it's just trying a concept - if it will work out well then we can try better approach
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