[En-Nut-Discussion] Ethernet HW questions

[Harald Kipp]

At 08:30 05.08.2004 -0700, you wrote:

>Hello,
>Unfortunately I modified the Ethernut1.3F /CS to drive 64K RAM, excluding
>CPU and RTL8019 space (8000-83FF). Thus upper 32K space drives RAM directly.
>If the Ethernut 1.3G will use A13 and A14 to mimic the EEPROM, I suppose
>that a collision will appair between RTL8019 and RAM during A13-A14 "ON"
>accesses . Is that true?

don't worry. Of course this will be configurable and the
software emulator will not do any harm to the RAM, because
-RD and -WR will be kept deactivated during this stage.
The EEPROM emulation is done by switching off the external
memory interface and using the address lines as I/O ports.

Harald