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Trash80toHP_Mini

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About Trash80toHP_Mini

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    NIGHT STALKER

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    Bermuda Triangle, NC, USA

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  1. Trash80toHP_Mini

    Compact Mac Video Timings Needed for SuperVideo Input Parameters

    Ah! But I might as well buy a 24mhz crystal just for the fun of it . . . unless you've got a better suggestion? You haven't said if it might be fed to the GS neck board thru the A/B gatekeeper? Good question? I don't think I've ever tried to lower the resolution, why would I as a dyed in the wool pixel junkie? In a quick check, neither resolution switching nor QuickDraw acceleration are mentioned in the manual, so I'd say not offhand. It was designed to drive SuperMac 16" and 19" 1024x768 displays which were almost certainly fixed at the 64mhz standard clock frequency. The card was bundled with a 30.24mhz crystal to drive two of Apple's fixed frequency displays. The card dates from 1989 and was geared toward panning around virtual desktop resolutions up to 4096x1536! Slap a 24mhz crystal on it to support MultiSync monitors at 640x480 or a 14.31818mhz crystal for NTSC RGB at 640x480. That last sounds very good indeed now that I've found it in the docs, I was afraid it might not support a low enough clock to output the Compact Mac's 512x342. Dunno, the card always sounded pretty awesome to me given that I was mired in B&W, albeit in the 1182xwhatever range at that time. Pathetic is in the eye of the beholder. In 1989 I think this was something to behold. By the second rev of the Spectrum/24 series, not so much. The market had moved beyond big virtual desktops to multiple big displays for CAD and DTP had begun to require QuickDraw acceleration. It'll do for this. ______________________________________________________________________________________________________ I'm getting waaaay ahead of myself here, but is there currently a RAMDAC type part available that's suitable to a GS/30™ card design? In the HDMI output NuBus VidCard thread, the VRAM side of things sounded practical enough, but the back end was a formulaic/done deal kinda thing for digital output from an FPGA. How would the analog side break down in terms of available, off the shelf components for pushing just a single, variable intensity analog feed to the GS neck board? Sounds like a strange beast?
  2. Trash80toHP_Mini

    Compact Mac Video Timings Needed for SuperVideo Input Parameters

    OMG that is just so ugly as to be beautiful on a 9" CRT. By displayable, do you mean from my card in a NuBus Mac or something that might be done as an alternate resolution on a GS Card, thinking the former? Might there enough play in vertical adjustment to square the pixels up into letterboxed wide aspect ratio goodness without releasing magic smoke? No joy on the lower frequency crystals. I've only got the 64mhz crystal for the big SuperMac monitors. I wonder how much crystals go for from parts suppliers, they're all over eBay in 15.6MHz modules for whatever.
  3. Trash80toHP_Mini

    Compact Mac Video Timings Needed for SuperVideo Input Parameters

    You got me curious about the TPD choices. I thought I'd seen composite somewhere, looks like it's combined with HD, but what's the significance of the PrecisionView 2150 Sync range switch? Wondering if COMP.HD is where I should be connecting the SE Radius TPD card's CoAx connection for the next SE/TPD playtime session?
  4. Trash80toHP_Mini

    Compact Mac Video Timings Needed for SuperVideo Input Parameters

    It's thanks to you and @BadGoldEagle that I was able to get so much information together and even gain a bit of understanding of how it all fits together. Both the MAG and the Radius have 5-BNC inputs, so I'd imagine they'll handle just about anything thrown at them. The Mag has BNC/VGA/MAC inputs, but the Radius with just BNC/VGA will do resolutions the MAG reports as out of sync. We'll see what happens, thanks much for the help!
  5. Trash80toHP_Mini

    Compact Mac Video Timings Needed for SuperVideo Input Parameters

    Note the part about the card needing to read setup info from disk before it can bring video online. This experiment is only good for testing to get anything at all to drive Compact Mac CRT as a 512x342 grayscale display for a NuBus Mac. Before that, the first baby rollover will be to get the card to display that resolution driving one of my very capable 21" multisync CRTs. The MAG has an LCD readout listing Mac resolutions/frequencies, can't wait try that one out if and when.
  6. Trash80toHP_Mini

    Compact Mac Video Timings Needed for SuperVideo Input Parameters

    I found the tidbit about 341 lines rather than the Compact Mac 342 lines, it was on gamba: I have been using a Micron Colour 30 with the GrayScale 30 internal adapter in my SE/30 for the last 6 months. It actually works as expected. The oonly problem i have found is the way Micron has chosen to solve a problem with stupid programs. Some programs start by checking the screen size and if it's 512 * 342 the program decides it must be 1 bit black/while; the programs does not check to see if the screen is grayscale. Micron chose set the screen size to 512 * 341 to force these programs to check the screen more closely. This unfortunately gives a few other problems, with some programs. I have had programs complaining that they could not run, because the program needed at least a 512 * 342 screen. Others decide that if the screen isn't 512 * 342 it must at least be 512 * 384 (Apple 12" colour) and start up with a dialog, where all the buttons have been placed outside the screen; most of these only need an OK, that can be reached by pressing the return button, but I have seen a few where I had to press the reset button to get my machine back. Can anyone confirm this?
  7. Trash80toHP_Mini

    Compact Mac Video Timings Needed for SuperVideo Input Parameters

    Thanks for the background info and guesses as to how the Xceed card works. It must indeed be doing some low level nasty to come up as the startup screen. One of the tidbits I picket up in research is that it outputs slightly less than(?) the full 342 lines as a way to throw the built-in video subsystem off its stride. Plays hob with compatibility IIRC. Not myopic at all, the only reason I've used the same graphic is that I have it on hand and reference the required inputs from it. The numbers are whatever were in the existing profile I was modifying. That's how you do a custom setup, edit and existing setup and save it under another filename. In this case the ill fated attempt at 1600x1200? I do have the complete docs and am in the process of sharing them with all. With any luck I'll have it scanned into a really ugly PDF from the printer at work and it will be able to email to me tonight without dropping dead in its tracks. This is an interesting piece of hardware from a time that no hard and fast standards had achieved hegemony, a nique opportunity presented. I've had on hand for many years and have long wanted to put through its paces. If it works, great, if no that's fine too, it's a learning experience. But there's no way I'm going to be able to go the VGA/Linux PC route, too much learning curve and too little time remaining for banging away at stuff that's not really fun for me. Docs coming up real soon now!
  8. Trash80toHP_Mini

    Help with portrait / full page displays

    I intended to say enviable, but more accurate word choice tripped off the fingertips. Even after I got an inexpensive B&W TPD for the used IIx back in the day I still lusted for the original FPD/SE. Years later, after I'd been Portraitized the pictures I saw online of the earlier FPD cases had less allure. How similar is the Macintosh Portrait Display to the /gs from Radius? Word on the street was that Radius designed/OEM'd the Portrait?
  9. Trash80toHP_Mini

    3D Print Replica HD 20 SC Enclosure?

    Nice! Will SCSI2SD fit into that scale model or is it a tad too small?
  10. Trash80toHP_Mini

    Compact Mac Video Timings Needed for SuperVideo Input Parameters

    Out of curiosity, how hard would it be to take the Macintosh II Video Card documentation, twerk its hardware spec to support GS/30™ resolution, tweak the driver for its output and cut the NuBus legs from beneath TOBY to put such an abomination onto the PDS of the SE/30? I don't think I'm projecting too far from results unachieved or even attempted thus far, but it appears that much of the information we need is coming together nicely for the undertaking? edit: not necessarily talking about building Frankenstein's monster out of a Toby card directly so much as recreating that model on a breadboard or PCB. edit 2: revisiting the Toby docs as inspiration for a new, simplified 8bit GS framebuffer card for the68030 PDS? Dunno, gonna keep running data and reference material down for that project and documenting it in this thread for the if and maybe when of a next phase.
  11. Trash80toHP_Mini

    Compact Mac Video Timings Needed for SuperVideo Input Parameters

    This diagram from the manual I can grok! My guess it that the single wire between card and neck board carries the grayscale intensity and the rest is for timing? Nice that neither patent drawing no Manual illustration include the complexity of doing external monitor support, that's a big plus for me. KISS = KIAIS - Keep It All Internal Stupid This one I not, so I'll do a markup of the pretty one in AI for future reference. Looks like it is indeed VOUT connected directly to GS neck board from VidCard. Silly of me to think in terms of RGB bundling, that's backwards. Need to do that for going from B&W output to an RGB display at a usable brightness level, not applicable here, the VidCard will ONLY do GS (and maybe B&W for compatibility?) if and when.
  12. Trash80toHP_Mini

    Compact Mac Video Timings Needed for SuperVideo Input Parameters

    Looks to me like the "Horizontal" problems with the two hacks we're referencing would be that those signals are generated by the logic board, derived from the system clock there and missing in their application of using A/B and neck board/CRT as a display sans mobo. We'll need to either jury rig something for using those signals from the lobotomized mobo of the host Mac to hijack its components as an external monitor for my IIcx or provide a makeshift solution as they did? Looking in another PDF I read that the Classic Mac series (128k-Plus) differs from the SE/SE30 A/B. No fun as I was aiming this kluge at a spare Plus. edit: YAY! For the first time ever I think, crucial illustrations for the next phase of a project rolled directly over at a page break!
  13. Trash80toHP_Mini

    Help with portrait / full page displays

    That's quite an envious collection of classic DTP CRT Displays. Any chance of doing a photo shoot so we can see them lined up and from all angles? edit: check out that Q&A before firing the Radius monitors up. Early models operated at two different frequencies and required properly matched video cards. I wouldn't try a gender changer to use the same DE-9 "serial cable" interface display with different cards for example. That FPD/gs sounds like a beautiful thing.
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