8-bit IDE

From: John Wilson <wilson_at_dbit.dbit.com>
Date: Tue Apr 18 19:29:20 2000

On Tue, Apr 18, 2000 at 06:11:15PM -0400, allisonp wrote:
> Limited logic, one latch. No rule said only one address for the data read
> or write.

I'm curious, how can it be done with just one latch? In my ISA-8 thing,
I used one latch for writing data, to hold the low byte until the PC writes
the high byte. And another in the other direction, to catch the high byte
when the PC reads the low byte. Then a 244 to allow writing the high byte,
and a 245 for all other cases (including 8-bit register accesses). Is there
some way I'm not thinking of, to flip one 373 around and use it in both
directions???

John Wilson
D Bit
Received on Tue Apr 18 2000 - 19:29:20 BST