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The important information as far as I am concerned is that the W5100 is connected directly to the Z80 in "indirect bus mode" at the following Z80 ports:

• 0xA0 - Mode register
• 0xA1 - Address high
• 0xA2 - Address low
• 0xA3 - Data

Quite right, trypo That's what comes of copy-pasting lines rather than typing each one in full.

Revised version attached.

The config file should look like the following, using the default values: 192.168.1.123 255.255.255.0 192.168.1.1 00:08:DC:4E:46:58 The file should have CP/M (Windows) line endings <CR><LF>. Yes the directory listing is in HTML format, and each of the file names should be a hyperlink which can be us...

Nothing to test this on, so I am coding blind :shock: However try the attached. This version of NFX.COM has (in theory) two differences from Andy's one: On start-up it reads an optional configuration file NFX.CFG containing one to four lines: IP address - Defaults to 192.168.1.123 if no configuratio...

Thanks for the link to the W5100 data. That is a lot to emulate, a 32K address space!

Andy's source may include sufficient information on the hardware interface, I will have to take a look.

Network clients are generally slightly easier to write. A client is typically only dealing with one transfer at a time and so can often be single threaded, whereas a server has to support multiple connections so almost has to be multi-threaded. However, given that Andy has already written the HTTP s...

I thought that this discussion needed a more meaningful title :) Except that changing the subject line does not change the title of the thread :( It might have been better to have started a new one. There are many possible protocols that can be used to transfer files over a network: HTTP - Hypertext...

I suppose that most users with a 3.5 inch SDX are aware of the bug in the SDX ROM, which overlaps the allocation vectors and the directory checksum vectors for the drives. This can cause failures when attempting to save files. The bug can be demonstrated in MEMU. Start MEMU with the following comman...

The system variables give the address of the end of the program also the end of variables. TapeView uses that to know how long the following BASIC data block should be. However it was assuming that the start was always at 0x4000, hence over-estimating the size of the block for programs saved from an...

And a screenshot of "LUNAR1" on MEMU: