16 Nov
2005
16 Nov
'05
5:22 p.m.
On 11/16/2005 at 11:54 AM Roger Merchberger wrote:
Originally I was going to design and build my own buss
structure /
backplane ( I was thinking 80 pins - 40-pin IDE headers are bog-easy to
find... ;-) something that could expand to a 16-bit CPU....
First card would be a fully buffered CPU, next card might be 256K or 512K
RAM, 3rd card might be a small LED/LCD display (2x40 or somesuch) and of
course, one card full'o'blinkinlights... ;-)
Why have a backplane at all? That much RAM is what, one or maybe two
chips?
Better than a backplane/bus, why not just a good I/O connection? A nice
serial hookup maybe?
More than fast enough for blinking lights and LCD displays. Why burden the
CPU-to-memory datapath with yucky bus interface hardware?
Cheers,
Chuck