[Coco] Dumb CoCo 3 Ethernet adapter
tlindner at macmess.org
Mon Nov 8 15:56:14 EST 2010
Here is a questions for the hardware guys on the list.
Would an dumb ethernet adapter be possible?
Here are the features I think it would need:
Convert the signals on the RX and TX lines of 10baseT to RS-232
voltages the CoCo bitbanger requires (-12v and +12v).
Used a low to high transition to signal the start of an incoming
packet. The CoCo 3 has a (useless for RS-232) low to high serial
interrupt. This would keep the software stack from having to poll the
The device I am describing has no packet buffering. This is to keep it
simple. So simple maybe even I could build it with my point-to-point
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