17 Sep
2007
17 Sep
'07
5 a.m.
At 11:00 PM -0500 9/16/07, Dave Dunfield wrote:
Mirroring in both halfs is always safe, or do what I
do
and put a jumper on the extra address pin - lets you have
two selectable ROMS (nor application and a debugger in
my case usually).
This is actually my end target, though I'll be using switches rather
than jumpers to select the version I want. I'll have to get the
datasheets and pay close attention to the pinouts when building the
adapters for the ones that are supposed to use the 27128.
Zane
--
| Zane H. Healy | UNIX Systems Administrator |
| healyzh at aracnet.com (primary) | OpenVMS Enthusiast |
| MONK::HEALYZH (DECnet) | Classic Computer Collector |
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