Radius Pivot on SE/30

[9166188]

Sweet! That's what I thought was the problem, glad to know you were able to test it! Congratulations on your breakthrough! It's also good to know that my idea regarding not needing a split and amplify circuit also works.

BadGoldEagle, I think the card is monochrome.

Thank you Themk!   You are very right and you said "one should be able to connect the R,G and B lines all together to get white" and "you may not need to amplify and split the signal, just electrically connect them all together".   So, lol, actually I was following your direction.   :b&w: 

Eagle, it's a monochrome card.   I wish it were a color one like yours.  My card came from a SE/30 and I was hoping that it could work with my 13" Apple High Resolution CRT out of box.   Unfortunately, the card always insists on 680x864, to the extent I think it's hardcoded to be the only supported mode.    Do you think this is the case with your IIsi Color Pivot?    I still would like a color card to work with my Apple CRT.

 

[9166188]

Which Apple CRT Monitor are you using?

According to megabyte (also a Pivot SE/30 owner), it works with the 'Macintosh Color Display' M1212. I have one but it's dead AFAIK.

Mine is M0401 which has the same 640x480 @ (H:35kHz V:67Hz) as M1212.   

I would really like to learn from megabyte if he got it working with M1212.

But I can only find that he got it working with a NEC LCD monitor.  I will remain a doubting Thomas that Pivot can work with a 640x480 Apple CRT.   :-/  

 

[Trash80toHP_Mini]

That would be a sweet looking setup, but who really cares about 640x480 on any display when you can have an 832x624 extended desktop? Have you tried that one yet?

Congratulations on your breakthrough! It's also good to know that my idea regarding not needing a split and amplify circuit also works.

I'll second that and offer same to you, Themk! This simple little hack will fix the MonoBlues for the entire range of single bit SE (and earlier) VidCards as well as GS cards for use with color displays. Good call, KISS is the only way to go.

For authenticity, flipping the output B->G will make 1-bit-vid easier on the eyes, per 90210's observation. Invert the signal for word processing and programming and you'll have r3tr0n3rd heaven! I'll need to do a three-way switchbox for shiggles-n-gits. I usually can't manage to adhere to the KISS principle very well at all  .  .  .

< .  .  .  wonders what values of resistance might be needed in what combination on RG&B to do AMBER!  >

< .  .  .  mmmmmmmmmmmmmmmmmm, Gas Plasma display simulation on LCD. h34r:   >

 

[BadGoldEagle]

Eagle, it's a monochrome card.   I wish it were a color one like yours.  

But mine's the exact same one! I was just showing a pic of my SE/30 with the IIsi card, which is color and compatible with the SE/30's PDS slot.

So there are no Radius color cards for the SE/30?? Was I wrong all this time??

LowEndMac says the SE/30 card can be used on a 256 color display.

 

[Trash80toHP_Mini]

But mine's the exact same one! I was just showing a pic of my SE/30 with the IIsi card, which is color and compatible with the SE/30's PDS slot.

So there are no Radius color cards for the SE/30?? Was I wrong all this time??

Are you sure? Look in the OP. My card is a different design. It has eight SIP VRAM ICs installed vertically in a row 2/3 of the way up from the connector and the DeclROM on the lower left corner (as opposed to top right corner) has stickerage reading COLORPIVOT, though TattleTech only identifies it as PIVOT. In the Blue Screen of Confusion thread, a driver convinces the COLORPIVOT that it's not connected to its defailt, a GS Pivot and it switches to color output on the fly after it loads. That's how I understand it, haven't verified that one on mine yet.

 

[Themk]

< .  .  .  wonders what values of resistance might be needed in what combination on RG&B to do AMBER!  >

< .  .  .  mmmmmmmmmmmmmmmmmm, Gas Plasma display simulation on LCD. h34r:   >

Amber would be one of the easier colors I would imagine. With amber, red can be at the max, and blue can be left N/C (but please reference it to GND), so you would only need to vary the voltage on the green line. Run your monochrome output line (I guess it is "blue") from the card to red on the monitor, and then set up a potentiometer as a voltage divider between the output from the card and the green input on the monitor. Adjust the potentiometer to your liking to change how much green you get on the display. Red+green=yellow. Amber is: RGB (255, 191, 0)

 

[Trash80toHP_Mini]

Yep, analog spinsy-dialsy-onna-box was the notion.

 

[Themk]

Well, based on both 9166188 and BadGoldEagle's find, as well as the general idea that this is a monochrome card, that means that the LowEndMac web page is inaccurate (It seems to be talking about the color pivot card, rather than just the "pivot" card). Someone should e-mail Dan Knight (I could if someone wants me to) and ask him to update the page, so people aren't confused in the future.

 

[Trash80toHP_Mini]

That's a good idea, all he'd need to do is to edit in the word "COLORPIVOT" per the ROM sticker.

The error's understandable as the card only says: "PIVOT 030 DIRECT SLOT INTERFACE"

Place an article stub for and Disambiguation (Wikipedia style) re the GS Pivot Card  .  .  .

.  .  .  might mention that considering the GS versions, it's not accurate to say that this one will drive ".  .  . any Radius Pivot monitor in 256 colour mode."

There a re a lot of errors in LEM's TechSpecs, a bit less in everymac's, some contradictory info, a few things they've both gotten wrong and vast swaths of info yet to be recovered and documented

edit: it might be best to approach Tom Owad over on 'fritter to add information to the card scans already in the NuBus Mafia database. Adding more cards and add tech specs into the mix to give that project a fresh start would really be great. When we started that collection back in the day, Digital Cameras were LowRez and expensive, so scanning was the only way to go. It still is in some ways (scale and angle) but the cameras have come plenty far enough in terms of detail levels and can overcome component height problems in order to do a pretty darn good job.

Somebody should kickstart that one.

 

[Trash80toHP_Mini]

edit2: Let's not forget to add cable pinouts to yo   .  .  . the project! [] ]'>

 

[Themk]

Okay, I'll go email Dan Knight... Right now!

Are you talking about adding my pinout to the NuBus Mafia database? I'd also be wiling to do some scans of my VidCard as well for the project. Would be nice to put that card in the database for future reference. I didn't see any card scans of the SE/30 pivot card in the NuBus Mafia database...

 

[Themk]

I sent the email to Dan Knight. (Now don't think it took me 2.5 hours to do it)