> Anyone following comp.sys.cbm will have seen a recent thread on > Commodore > networking. Some jumped up little American sysadmin has started making a > lot of noise about the idea of Ethernet on a CBM machine, as well as > being I had a similar discussion before and I looked into the standard NE2000 networking chipsets. The problem is that the data rate of the ethernet is too large to let the 6502 handle it itself. secondly, the DMA mode requires, as far as I remember, a certain clock rate that does not fit the C64, so you will not be able to directly glue a simple NE2000 chip to the C64. The only possibilty I saw was to have a 64k RAM buffer that the NE1000/2000 chipset accesses via 8-bit DMA, and the C64 would again access this buffer via DMA. Additional issues then are how to bypass the buffer to access the ethernet chipset's control registers, syncchronizing the different (asynchronous) clock rates of C64 and Ethernet etc. The hardware effort, so I judged, was much too high (at least if you don't have a layout program and a way to etch PCBs...) Andre -- Sent through GMX FreeMail - http://www.gmx.net - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail email@example.com.
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