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Any one heard of a SCSI graph?

applefreak

Well-known member
Radius PowerView ? ?

RPowerView1.jpg


RPowerView2.jpg


http://68kmla.org/forums/viewtopic.php?t=639

 

Bunsen

Admin-Witchfinder-General
Holy unobtanium, Batman!

ScuzzyGraph II can output 16 colors and is QuickDraw-compatible. It gives users screen sizes up to 650 percent larger than the built-in Macintosh SE screen with resolution up to 1,280x1,024 pixels
Impressive. Is that now in your possession?

 

Dennis Nedry

Well-known member
It could have a driver inside the SCSIGraph, similar to how a SCSI hard drive contains its own driver. I think you would want it to load its driver before the OS loads so that the monitors control panel picks up on it like a normal screen. Pure speculation, though. It seems like an impossible device.

 

Classic Mac

Well-known member
The 15 pin monitor plug is wired to the VGA plug. So if its parallel does that mean it can run two monitors at the same time?

 

Trash80toHP_Mini

NIGHT STALKER
Severely doubtful, pretty sure it's an either/or selection.

BTW, I posted some compatibility tables and info on other SCSI and RAM based Video Adapters today.

 

noidentity

Well-known member
The main issue is termination. As far as I know, the video signals are terminated by 75 ohm resistors in the monitor. If you connect two monitors, you get basically 37 ohm termination, thus a darker picture at the very least. The sync signals would be halved, so the monitor(s) might not even detect sync. They would show the same picture, so it wouldn't be that useful.

 

Classic Mac

Well-known member
Well, we tryed it out on an SE/sys 6.0.5 and a 540c/7.5.5.. The monitor was a KDS flat screen 15". No go, just a black screen.

There is a 2 position switch on the bottom that obviously makes a low to high resolution change. There are two chips on the board inside marked "high", "low". The screen visibly changes although black.

The eight DIPs Are very similar to the ones on the mac to vga converter. No amount of changing worked.

There is onboard termination on SG; with an external terminator the computer would not boot.

another info site

http://www.greenstone.org/greenstone3/nzdl;jsessionid=C41637FCE697514C367D971F407D8CCD?a=d&d=HASH01154c4e41f45061c699983f.2.np&c=tidbits&sib=1&dt=&ec=&et=&p.a=b&p.s=ClassifierBrowse&p.sa=

The first product, Aura Systems's ScuzzyGraph II, allows you to attach a color monitor to a 512KE, Plus, or SE. This cannot normally be done because the ROMs in these computers do not have color QuickDraw. The sales people in the booth didn't exactly know how the product works, but they did have it hooked up to a Plus and an SE. The SE had an accelerator card in it (we easily detected the card when we launched Word 4.0 and it came up almost instantly), so we couldn't tell whether or not the ScuzzyGraph was slowing down the SE. The Plus, however, seemed to be plugging along at its normal rate.

ScuzzyGraph is a box about the size of a hard drive, and can sit comfortably under a compact Mac. Inside the box, according to Aura, resides a special graphics processor which processes and accelerates QuickDraw commands. The spec sheet says that ScuzzyGraph gives you up to a 650% larger screen, eight "vivid" colors (they looked normal to us), 1280 by 1024 pixels (though this amount only applies to the most expensive version), instant installation, works with existing software (we should hope so!), and color printing (a good reason to buy Color MacCheese).

It looked to us like ScuzzyGraph might be a nice option for people who already have a compact Mac and want a color monitor, but that the price rules it out as something people would buy along with a new compact system in most cases. There are actually three versions of ScuzzyGraph, and the main differences are the resolutions they support. They cost, list price, $895, $1295, and $1995 respectively. You can also buy them with a monitor provided by Aura, and they offer four models, with prices ranging from $1595 to $3695, depending on the resolution and the monitor size. Since we still don't know how the device works, we would recommend more research on the part of anyone contemplating a purchase.

Another product line that expands on some compact Macs is a line of expansion chassis from Second Wave. Like the ScuzzyGraph, these products will, in most cases, only make sense when purchased for an older machine, not if purchased in conjunction with a new Mac. Second Wave makes a two-slot chassis for the Portable that takes SE cards, a four-slot chassis for Pluses and SEs that takes SE cards, and a four and an eight-slot NuBus chassis for the SE/30. (It also make them for Mac IIs, for people who want more slots than fingers.) The idea of the chassis was more exciting than actually looking at it, though in some cases the boxes were fairly large, which might be something (especially in the case of the Portable) that you would want to know before you bought.

It's nice to know that expansion products exist for the compact Macs although to be successful these products must be boring and blend in just as though the Mac had color capabilities or several slots built in. They seem to do just that, so if you are truly attached to your compact Mac and want a little more room to flex, check them out.

Aura Systems -- 800/365-AURA

P1120888.JPG

 

register

Well-known member
Not sure if it needs software or just the dip switches set correctly.
Most likely it is not worth a further try without appropriate driver software. Graphics output through the SCSI is nothing the system will do of its own volition. Better dig up the installer disk.
 

Dennis Nedry

Well-known member
I still think the system could pull in a driver from the SCSI Graph similar to a hard disk driver, so it would light up the display before even beginning to boot.

 

Charlieman

Well-known member
I've read a few articles about the ScuzzyGraph. The first thing to note is that a device driver is essential because the Mac does not normally send video signals along the SCSI bus. It is likely to be a system software driver (so that it can be updated) and to be dependent on specific system versions (which possibly excludes later versions of System 6).

It works by hooking into the QuickDraw calls that generate a shaded pattern, substituting them for a colour block. Thus, it can create colour versions of MacPaint, MacDraw, Excel chart documents etc.

 

Juror22

Well-known member
You may want to get in touch with this guy...

http://home.comcast.net/~kohlenrw/onlinestorage/doc/RWKresume.pdf

Mr. Kohlenberger lists this on his resume:

May 1988 to April 1993 Lead software engineer Aura Systems, Inc.

Major accomplishments: Managed the software development for several SCSI-based video boards for the Macintosh: ScuzzyGraph/ScuzzyView, and OEM products. Software (MPW C and assembly) included a system extension, control panel, slide show application, system patches, video driver, VBL interrupt and shutdown tasks, and programmer’s API. Managed custom software versions for two OEM licensees: Sigma Designs (PowerPage) and SuperMac (SuperView). Maintained source code over a network. Team leader for four other programmers.

 

Classic Mac

Well-known member
^^ Thats a little old.. the email didn't go through. He is probably retired and living the good life in bermuda or something.

 
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