RR-Net (Was: Porting the TFE)

[MagerValp <MagerValp@cling.gu.se>]

>>>>> "LC" == Lee Cremeans <lee@lcremeans.homeip.net> writes:

LC> I went over to TFE's website (http://wwww.dunkels.com/adam/tfe),
LC> and looked at the schematics. The overall design of the thing is
LC> even simpler than the CFFA card; it's just a (third-party) board
LC> with the Cirrus CS8900, 20 MHz crystal and Ethernet isolation
LC> transformer on it, plus an address decoder (all of 1 74LS139!) on
LC> the cartridge PCB. It'd be easy enough to port to the II; just
LC> change the wiring so that it decodes to slot DEVSEL space instead
LC> of C=64 cart space (very simple).

It'd be even cheaper and easier to make an A1200 clock port card. This
would allow you to connect Silver Surfer (16C550) and RR-Net (CS8900A)
modules from www.jschoenfeld.de. They cost EUR 30 and EUR 50 respec-
tively. Though as you still need to make your own PCBs, you might as
well incorporate the CS8900A straight on the board.
  Regarding TCP/IP code, I'm working on a small stack in 6502 asm:

  http://www.paradroid.net/ip65/

I'm writing it for the C64, but the code is portable. Only two files
would need to be changed to run it on an Apple II. As the diagram
shows I've got most of the basic architecture done, TCP is the only
major piece of work that's left. 

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