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Grex > Micros > #146: Info on Mac High Res. display card needed. | |
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n8nxf
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Info on Mac High Res. display card needed.
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Jun 25 13:42 UTC 1996 |
I am resurecting a Mac IIcx. All I need now is a monitor. It came
with a High resolution display card. Can someone tell me what the
pinout is on the DB-15 connector? I'm going to try to connect it to a
standard VGA monitor. I know it'll drive a 640 X 480 display, but I'm
not sure of the vertical frequency. I'm also aware that I may have to
invert some of the signals in order for this to work. Any suggestions
or information would be great!
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| 2 responses total. |
ajax
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response 1 of 2:
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Jun 25 17:01 UTC 1996 |
From _The Programmer's Apple Mac Sourcebook_:
4.67 Macintosh II Video Card Pinouts
Pin # Signal Name Signal Description
1 GND Ground
2 RED Red color signal
3 /CSYNCH Synchronization
4 GND Ground
5 GREEN Green color signal
6 GND Ground
7 NC No connection
8 NC No connection
9 BLUE Blue color signal
10 NC No connection
11 GND Ground
12 NC No connection
13 GND Ground
14 GND Ground
15 NC No connection
Notes: * Signals are for analog monitor
* Connector is DB-15 socket
Source: Designing Cards and Drivers for the Macintosh II
and Macintosh SE
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n8nxf
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response 2 of 2:
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Jun 26 14:26 UTC 1996 |
Thank you Rob! Interesting. It looks as though horizontal and vertical
sync are combined on the Mac output. PC monitors require separate H and
V sync signals. Time to dig up some sync serarator circuits.... After I
look at it with a scope. I'll also have to figure out the diff. between
digital and analog monitors.
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