29 Dec
2002
29 Dec
'02
11:12 p.m.
On Mon, 30 Dec 2002, R. D. Davis wrote:
Tonight while looking for a wall wart for an old Hayes
modem, I
discovered something that I didn't know I had: some sort of monitor
cable adapter. At one end is a Sun workstation style monitor
connector from which four cables are connected to BNC connectors with
reg, green, blue and white labels. Does anyone on this group knows if
it will work with an HP (Sony) 98789A fixed frequency monitor which
has R, G, B and HD and VD sync connectors (can I use just one of these
syncs?). I'd hook it up to see if it works without asking, but I'd
prefer not to have to carry the monitor down to the basement if it
isn't going to work. :-)
That's going to depend more on the graphics adapter than the cable
adapter. If the adapter outputs sync-on-green (old DEC, SGI), you can
use only the R, G, and B connectors, or use the white one on the HD sync
if your graphics card outputs Composite-Sync (Macs, most Sun, etc.)
All of the 5-BNC displays I've owned would work with mono (one
connection to green), RGB, Composite-Sync, or Separatee-Sync. However,
fixed-frequency displas often won't work because the graphics adapter
can't be tuned to the right sync & refresh. My HP 98754A - same specs,
bigger tube - will work with an MCA color graphics adapter, although the
picture is square, an IBM X-Station 150, most of my 9000/7xx boxes, and,
IIRC, the 4-plane color board in one of my VAXstation 3100s.
The specs are 63.35KHz and 60Hz, by the way. You can probably
underdrive it by 5%, and I wouldn't overdrive it more than 1-2%, if at
all.
What are you going to connect it to?
Doc