Path: news1.icaen!news.uiowa.edu!news1.chicago.iagnet.net!qual.net!iagnet.net!nntprelay.mathworks.com!news.mv.net!newspump.wustl.edu!crcnews.unl.edu!unlinfo.unl.edu!jkeim From: jkeim@unlinfo.unl.edu (James Keim aka "Sunny Jim") Newsgroups: comp.sys.apple2 Subject: Re: Using a Mac monitor on a GS? Date: 29 Jan 1998 16:21:26 GMT Organization: University of Nebraska--Lincoln Lines: 200 Distribution: world Message-ID: <6aqaa6$bbm@crcnis3.unl.edu> References: <6aja5g$jut@news.inforamp.net> <27JAN199822171004@vax2.concordia.ca> <6amsul$2m6@nntp02.primenet.com> NNTP-Posting-Host: unlinfo2.unl.edu X-Newsreader: TIN [version 1.2 PL2] Xref: news1.icaen comp.sys.apple2:129610 Steve Jensen (sjensen@primenetyourknife.com) wrote: : I have a Sony CPD-1302 multisynch monitor I'd like to try on a GS. : Has anyone done this? I have a Mac 9-15 pin cable. Here's some : specs: : : Scan Rates: : Horizontal scan: 15-34 Khz : Vertical refresh: 50-100 Hz : Bandwidth: 25 Mhz : Mac Adapter: : Video Signal: : Signal type: Analog / Digital : Sync: Green : : Physical Specifications: : Type of connector: 9 pin : Dot pitch: .25 mm Okay, this all looks good. It should work. Now, I am guessing it will also sync on the horizontal sync--not just the sync on green. Still, that's good to know. I think the document I have included will help in constructing a cable. This document represents my revised cable diagram for the NEC Multisync II. These pinouts are more accurate than any previous postings I may have made converning the NEC Multisync II. These pinouts are fairly standard for any VGA capable monitor with a 9-pin subminiture D connector. Using these same pinouts for the NEC you can make cables for video game systems, too. The RGB output of the NEC makes most home game consoles look _very_ good. Using such a cable, DOOM and Wolf3D on my Atari Jaguar (64-bit) look much better than the versions for the PC or Mac. I am indebted to Nathan Mate's FAQs for the pinouts. In fact, the GS pinouts come directly from the FAQs. I give my permission for this document to be archived in Nathan's FAQ archive if he so desires. Hope this helps. Email me if you have any questions. Pin assignment of NEC Multisync II monitor: pin # analog/digital RGB signal 1 Red 2 Green 3 Blue 4 Horizontal Sync 5 Vertical Sync 6 Red Ground (return) 7 Green Ground (return) 8 Blue Ground (return) 9 Ground ____________________ \ 5 4 3 2 1 / \ / \ 9 8 7 6 / ------------- pin assignment of IIGS RGB connector: pin # signal 1 ground (for red ?) 2 red 3 composite sync. 4 not used 5 green 6 ground (for green ?) 7 -5 V 8 +12 V 9 blue 10 not used 11 audio output (not used) 12 monochrome screen off (???) 13 ground (for blue ?) 14 not used 15 not used system ground | | __________|_____________________________ \ 8 7 6 5 4 3 2 1 / \ 15 14 13 12 11 10 9 / ------------------------------------ THE PIN ASSIGNMENTS... On the //GS RGB Monitor Port On the NEC Multisync II In PIN NUMBER PIN NUMBER 2..............................................1 (Analog RED) (Analog RED) 5..............................................2 (Analog GREEN) (Analog GREEN) 9.............................................3 (Analog BLUE) (Analog BLUE) 3.............................................4 (Composite SYNC) (Horizontal SYNC) 1.............................................6 (Signal GROUND Red) (GROUND) 6.............................................7 (Signal GROUND Green) (GROUND) 13.............................................8 (Signal GROUND Blue) (GROUND) 4.............................................9 (No Connection) (GROUND) Although there are six pins on the 9 pins on the NEC Multisync II, DO NOT hook up Pin 5 (Vertical Sync) to the GS 15 Pin connector. Just chop it off. The NEC Multisync II is capable of composite sync on its horizontal sync pin. So, for GS purposes it is simply not needed. However, if you were to use the NEC with a SecondSight card, the Vertical Sync pin would be used. However, if you are going to use the SecondSight with the NEC, I'd use a SVGA to VGA cable (can be purchased at any decent computer store) because the NEC doesn't respond well to the interlacing that is attempted through the SecondSights GS RGB connector. Here is some more technical information that you might find interesting or useful. Specifications Model number JC-1402HMA Display Format Signal input: Separate synchronization TTL Horizontal synchronization positive/negative Vertical synchronization positive/negative Composite synchronization TTL positive/negative 0.3 V p-p (on green) Horizontal frequency 15.5 to 35 kHz Vertical frequency 50/80 Hz auto Technology Tri-dot Picture tube Color Phosphor Med Bandwidth 30 Mhz CRT Size 14 inches (13 inches viewable image size) Deflection angle 90 Dot pitch 0.31 mm Physical Connector 9-pin D-subminiature (I've never seen this connector) --> 15-pin mini D-subminiature (and I've never seen pinouts for it) (does it exist?) Width 360 mm (14.2 inches) Height 372 mm (14.7 inches) Depth 400 mm (15.8 inches) Weight 16 kg (35 lb) Electrical FCC class B Average power consumption 92 W Power supply 120 VAC at 60 Hz Resolutions Video Horizontal Vertical Monochrome 720 350 CGA 320 200 CGA 640 200 EGA 640 350 VGA 640 480 Super VGA 800 560 Super VGA: Although the maximum resolution the monitor can display properly is 800 x 560, it is commonly used for 800 x 600. This will use the "overscan" area of the monitor and only lose a couple of lines. However, this is pretty much a non-issue when used with the SecondSight card--I haven't seen any software that uses the 800x600 resolution. I'd love to be corrected on this.