20 Aug
2006
20 Aug
'06
6:23 p.m.
On 8/20/2006 at 11:55 PM ard at p850ug1.demon.co.uk wrote:
However, I have seen a 48 pin 5025 that has much the
same pinout as
(IIRC) the 7900 -- well, one ethernet chip anyhow. Somewhere I have a
communciations bridge that can take 3 I/O cards. On the mainboard you fit
an 7990 for positions where you have ethernet cards, and a 5025 for the
X21 or X25 cards. I think there's a jumper to set too, but that's it.
Yup, that's essentially what the MK5025 datasheet says: "Nearly
pin-compatible with the Lance chip (MK7990)". Which is a curious use of
the term "compatible"--i.e. the signals are almost the same, the chip
functionality is not.
Strange but true.
Cheers,
Chuck