5 Jan
2011
5 Jan
'11
2:50 p.m.
On Tue, Jan 4, 2011 at 1:45 PM, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
As I rememebr it, there's a signal on the Qbus (it has no Unibus
equivalent) which indicates an access to the I/O page. Properly designed
I.O devies (anything from DEC at lesst) use this signal rather than
decoding the upper address lines.
BBS7 L on card edge connector pin AP2.