| |
DB9ER > APPLE 03.04.96 19:02l 185 Lines 7105 Bytes #-11167 (0) @ EU
BID : 034606DB0IZ
Read: DH9MEC GUEST DK3EL
Subj: MonitorSense.asc
Path: DB0AAB<DB0KCP<DB0CRL<DB0RBS<DB0SEL<DB0ZDF<DB0AIS<DB0IZ
Sent: 960403/1512z @:DB0IZ.#NRW.DEU.EU [Solingen, JO31NE, DL6EE] $:034606DB0IZ
de DB9ER @ DB0IZ.#NRW.DEU.EU (Dieter)
to APPLE @ EU
Note from Apple.
Macintosh Display Cards 4¥8 & 8¥24 and third-party monitors
What do I need to determine if my third-party monitor is compatible with an
Apple video display card?
___
The Macintosh¨ Display Cards 4¥8 & 8¥24 support any monitor that meets one of
the following specifications:
- - - - - - MHz - - - - -
Sense pins Hor x Vert Dot Vert Horiz
10 7 4 Display Pixels Clock Refrsh Refrsh
---------- ---------------------- ---------- ------- ------ ------
0 0 0 21-inch Color Monitor 1152 x 870 100 75 68.7
0 0 1 Apple Portrait Display 640 x 870 57.2832 75 68.9
0 1 1 Apple Two-Page Monitor 1152 x 870 100 75 68.7
1 1 0 12Ó Apple
Monochrome Monitor 640 x 480 30.24 66.7 35.0
1 1 0 13Ó AppleColor
RGB Monitor 640 x 480 30.24 66.7 35.0
0 - Grounded 1 - Not Connected
Note that sense pins 4, 7, and 10 are referred to as SENSE0, SENSE1, and
SENSE2 in video connector pinout tables, such as the table in ÒMacintosh
Display Cards 4¥8 and 8¥24 Developer Note.
Here are the pinouts for the Macintosh Display Cards:
Pin Description
--- -----------
1 Red Video Ground
2 Red Video
3 Composite Sync
4 SENSE0
5 Green Video
6 Green Video Ground
7 SENSE1
8 Not Connected
9 Blue Video
10 SENSE2
11 Composite Sync and Vertical Sync Ground
12 Vertical Sync
13 Blue Video Ground
14 Horizontal Sync Ground
15 Horizontal Sync
Shell Chassis Ground
©Apple Computer, Inc. 1985-1991
"Monitor sense pins.note"
From Compuserve, May, 1992.
The sensing of monitor type is through pins 4, 7, and 10. The sensing pins should be grounded or left unconnected. You can ground a pin by connecting it to Pin 11.
Display Pixels Hz Pins grounded
Apple Hi Res Monochrome 480 x 640 67 Hz 4
Apple Hi Res RGB 480 x 640 67 Hz 4
Apple 12" RGB 512 x 384 67 Hz 4, 10
Apple 15" Portrait 640 x 870 75 Hz 7, 10
Apple 2-Page Monochrome 1152 x 870 75 Hz 10
VGA 480 x 640 10
RS-170A (interlaced) 480 x 640 60 Hz 4, 7
Sources:
Apple Macintosh Technical Note 144: Macintosh Color Monitor Connections.
Apple Macintosh Developer Notes: Macintosh Display Card 8¥24 GC.
Message: #27362, S/2 Mac Tech Questions
Date: Tue, May 12, 1992 8:21:16 PM
Subject: LC technical question
From: Kevin Norris [AsstSysop] 75410,1674
To: Ken Settle 76556,753 (received)
Reply: #27441 (1 reply)
Mac LC video connector pinouts:
Pin Number Signal Name Signal Description
1 RED.GND Red ground
2 RED.VID Red video signal
3,15 /CSYNC or /HSYNC Composite synchronization signal if
Apple monitor. Horizontal
synchronization signal if VGA
monitor.
4 SENSE0 Monitor sense signal 0
5 GRN.VID Green video signal
6 GRN.GND Green ground
7 SENSE1 Monitor sense signal 1 (grounded
internally)
8 n.c. Not connected
9 BLU.VID Blue video signal
10 SENSE2 Monitor sense signal 2
11 C&VSYNC.GND Ground for CSYNC and VSYNC
12 /VSYNC Vertical synchronization signal
13 BLU.GND Blue ground
14 HSYNC.GND HSYNC ground
Shell CHASSIS.GND Chassis ground
A "/" at the beginning of a signal name indicates that the signal is active low.
The Macintosh LC does not supply vertical synchronization with the Green video signal (pin~5). The vertical synchronization signal is supplied on pin 12.
The Macintosh LC requires that pin 4 (SENSE0) be connected to Ground to signal the connection of a 640 x 480 monitor. The Macintosh LC requires that pin 4 and 10 (SENSE0 and SENSE2) be connected to Ground to signal the connection of a 512 x 384 monitor (i
***********Downloaded from Compuserve June 15, 1994**************
Here is how to get the most out of Your Multisync Monitor connected
to Your Apple:
With Apple's New Multiple-Scan-Monitor-Software which works on all Quadras
You can switch the resolution of Your screen without shutting down Your Mac
or pulling switches or changing Adapters!
So first get a copy of this Software.
Second You have to tell Your Mac that the Monitor supports Multiple Frequencies:
get 2 Sub-D 15-Pin connectors, one male, one female.
get 1 Diode.
connect all Pins but 4,7,10 straight between the two connectors.
on the male side of the connector short pins 4 and 11 with a wire.
connect the diode between pin 7 and 10 of the male connector in
a way that the black ring on the diode points to pin 7.
Now put this adapter between your mac and Your Video-Cable
You now got an 20'' multiple Scan Monitor!
You may switch between all Apple-Resolutions ranging
from 640*480, 832*624, 1024*768 to 1178*870 Dots
But Be careful not to damage Your Monitor with the high resolutions!
If You like this Tip, send me a Postcard!
Philipp Biermann
Im Winkelrain 52
72076 Tuebingen
Germany
CIS: 100022,327
RELATED NOTES:
- if your Monitor runs without the apple-software and simply goes dark
if the apple-m-scan-software is installed your cable adapter needs an
update because the apple software switches off the sync-signal from
the green-video. simply buy a new apple to VGA-adapter which supports
an extra sync line! (all new machines made by apple up from LC-III have no
sync on green because of energy-star-compatible reasons (????)
If You use an Monitor with BNC-Connectors You may connect pin 3 with
the Composite Sync on your monitor (ground to Pin 11) or 14 to H-Sync
and 12 to V-sync (gournd on 11) instead of buying a new cable!
Machines with sync on green are Quadra 700, Quadra 900/950 and some
other.
- The adapter should also work with the LC475/Performa 475 or newer models
because this is the same Video as in the Q610
maybe also in some LCIII and on some 8*24 and 8*24GC Cards
Mac video pinouts:
DB15M DB15F Pin Assignments
1 1 RED GND
2 2 RED VIDEO
3 3 C SYNC
5 5 GREEN VIDEO
6 6 GREEN GND
9 9 BLUE VIDEO
11 11 C & V SYNC GND
12 12 V SYNC
13 13 BLUE GND
14 14 H SYNC GND
15 15 H SYNC
-------------------------- snip ------------------------------------
found on the CD-Nr-17 MAC_Mag.
73 , DB9ER, Dieter
Read previous mail | Read next mail
| |
