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jessenator

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About jessenator

  • Birthday October 16

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    Utahr

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  1. jessenator

    Tanzania to Tanzania II upgrade

    I think I'm one of those weirdos who would rather have a Rage128 in every PCI mac :P I actually just acquired a 4MB module for the beige G3 MT. And so far I haven't minded the on-board video in the 4400 now that I can use something larger than my 13" AppleColor display: I also acquired a Radius Pivot cable, which works a treat connecting my D-15 mac connectors to my SVGA Sony LCD. In that transaction I received a ViewSonic dip-siwtch adapter as well as the Apple D-15 female to SVGA male adapter, but the cable has put them both out of work I do kick myself a little for not getting that 6500/250+monitor+goodies... oh well, onward and upward. Thought about buying OleLila's 6500, but shipping that would be a pretty penny, though it does seem a nicer deal, cosmetically, than what's on ebay... I can be patient I guess. I think my main crossroads now is what to do with my Starmax 5000 board. Part of me wants to modify the 4400's case to accommodate it (the PS/2 ports I think are adding just enough to not align with the board pins), and slightly widening the video cutout on the i/o. I mean, it's not a stock 4400 now anyway, what with the PSU substitution and industrial hook-n-loop attached battery holder. Using the Starmax board would alleviate my need for a 64/6500 anyway.
  2. jessenator

    PRAM won't zap?

    20-pin vs 24-pin. Some PSUs have the extra 4-pin "break off" from the main connector. As wasteful as it sounds, I was looking at (cheap) modular PSUs as a replacement for several of my machines, actually. I'm not a fan of the molex-everywhere approach, which was basically the only approach in the 90s.
  3. jessenator

    Tanzania to Tanzania II upgrade

    I'm gonna tear this off some more Just to be clear here, are you asking if starting with a 6500 /275 or /300 would be more desirable than a G3 upgrade, or? Nope, that was in response to jessinator's post about pushing the clock of the 6400/6360 bus to 50MHz as he's trying to do in his Tanzania thread. He mentioned 603e complications. I'm wondering if the Crescendo/L2 would negate any possible complications concerning the system CPU as it runs on both 40MHz Alchemy and 50MHz Gazelle architectures. I've been thinking about this for that G3 upgrade. Sadly, I let that (relatively) local 6500/250 slip away from me. I wondered if there was a way to have one's cake and eat it to with the 6400. It seems that the 6400 is a slightly more desirable overall architecture compared to the 6500, and wondered if the Bus could be upped to 50 without running into other problems. I haven't looked at an Alchemy board or sone any research, so this is all conjecture, based on Tanzania tinkering. The Tanzania, stated previously, shows provision in the design to swap a few SMD resitors and caps to work at 50MHz bus. But, as is apparent from the table, depending on how the multipliers are set, it would push the CPU to operate well out of its designed range. At least, doing so on a 200MHz 603e on the Tanzania (and II) would certainly do that, unless you set the CPU resistors to a lower multiplier, say 4.5, for 225 MHz, which is the designed maximum for its particular 603e CPU All of this, yes, just for getting a Sonnet Crescendo L2 to run at its intended 500MHz Again, in all practicality, I have this functionality with my Gossamer G3 MT (has a Sonnet 500 MHz ZIF CPU in it). Again, all for the tinkerz. I think we did indeed discus the relative, vanilla performance specs of, say, a Gossamer G3 233 or 266 vs a Power Mac 6500/300 as well…somewhere Edit, looks like Zone6400 has some blog updates about their tinkering with the 6400 speed and hints that a bus upgrade can be accomplished with a crystal swap…
  4. jessenator

    SE/30 Xceed greyscale adapter cloning thread

    Maybe not feasible (too bleeding edge?), but I heard on GamersNexus HW recap about this: https://www.electronicsweekly.com/news/business/non-destructive-way-2019-10/ non-destructive means is interesting. I for one, am perfectly content for "recreate the Color 30" straightforward approach. No creep
  5. jessenator

    SE/30 Xceed greyscale adapter cloning thread

    I'd be interested as well. Wasn't there a development thread for this? Not that a renewed spark of interest would hurt anything Is this something the spearheader would want to be kept under their supervision (funding) or something to take to a crowdsourcing medium? I wonder, too, if this could be a BYOadapter situation. There are kits for the yoke already at least. Personally, I'm not too interested in an external monitor connection, but I might be in the minority.
  6. jessenator

    Macintosh SE flicker and interference

    If your RF shielding paint is still good on the case, and there's nothing terribly powerful nearby, I suspect it's more due to bad caps than it is interference. But I'm out of my wheelhouse there. Granted there's probably a minimum distance for older CRT-driven equipment that's understood, maybe that's the right word? Purely supposition, but something like a broadcast monitor has a heckuva lot more shielding on it. These old compact macs have relatively little. Maybe they weren't meant to be butted up to one another? ¯\_(ツ)_/¯ I don't know how close you're putting them. Again, supposition on this particular aspect. Just anecdotal, personal experience has told me getting CRTs too close to each other, without proper shielding, can lead to interference.
  7. jessenator

    Macintosh SE flicker and interference

    Definitely. In clarity to my glue comment, follow JDW's advice on getting to those specific components and don't go wild with a set of pliers I did this to my Astec-branded PSU when I recapped it but just reaching for a mass of glue and pulling… Thankfully I had another capacitor of that value on hand.
  8. jessenator

    Macintosh SE flicker and interference

    Second on the capacitors. 68kmla member JDW has an excellent video on replacing the SE analog board caps, and it's not too bad to do, just mind the hot glue portions. I had a situation just like yours on my SE/30: wavy screen drawing that would get better the longer it was powered on. Just recapping the analog board made it all go away. Doing the power supply also wouldn't be a bad idea while you have it all disassembled. Would save on parts shipping
  9. jessenator

    Jessenator's conquests

    I'll chalk up another soldering victory (took me far too long, but still). Analog board and PSU recapped To save time, I just used the yoke and tube from the Classic (the connectors weren't burnt up). Close save after I blindly started peeling off hot glue: But I found a 100nf cap on the parts, Classic analog board. ok now it's time for bed...
  10. jessenator

    Jessenator's conquests

    Got the last cap soldered onto the Starmax board. Gutted the 4400 with the hopes of swapping the board, and *ahem* positioned the board in mediocre fashion*. Hooked up the PSU and a keyboard, gave it a tap on the soft power and... The board, even though the connectors are flush, doesn't quite fit into the case, onto the support pegs, which is meh. Guess I'm left with the decision to someday find a new case, or get out the dremel and go to town! I'm kind of inclined to dremel out the I/O panel further. The 4400 is kind of an eyesore, so I don't think modification would be too heretical. *Here's the insulated (bubble wrap and a box) solution just to power it up anyway. without completely disassembling the 4400—I wanted to hear everything hooked up: speakers, fan, etc.
  11. jessenator

    PRAM won't zap?

    Taking the battery out will definitely zap the PRAM—sorry I know that was suggested already. That sounds like there's something deeper going on sorry that's a bit above my pay grade. The battery is good? PSU still in decent shape? Sorry that's the basic stuff I know on these models.
  12. jessenator

    PRAM won't zap?

    Ah, I guess if your VGA monitor isn't working that would be tough—sorry if I'm crossing your posts' wires in my head. Did the Rage128 stop working then?
  13. jessenator

    PRAM won't zap?

    Maybe I'm not reading your procedure correctly, so forgive me if I'm way off base here I've only successfully zapped pRAM by holding down alt+cmd+p+r after the initial start chime: e.g. boot, right after the chime, hold the keys, wait for a second chime—if that's what you're already doing, ignore me Another elementary question here: Have you had issues with any of the keys? testing it with Key Caps program in Mac OS? Just a thought.
  14. jessenator

    Solid State Drive for G3?

    There should be 2MB soldered on-board—those two big ICs beneath where an upgrade module would go in the white, sideways holder. The expansion will take you up to 6MB total with a 4MB module installed. SO there's enough on the board to support a monitor. Curious that yours still doesn't work with an Apple monitor. Do you have an older install CD? the 8.0 discs? be aware that the ROM ver. will determine which image will be bootable (I went through several to get my beige MT to boot). The older disc is just my theory about 8.5+ not supporting 512 x 384 any longer, but it's more supposition than anything.
  15. jessenator

    Solid State Drive for G3?

    I have a Rage128 as well. Dang good card that's worked in all of my PCI macs wonderfully. I want to get a few more so I'm not playing musical video card all the time though. I'm baffled by that monitor business as well. Apple Spec says it should support 512 x 384 internally. I wonder if that's just for 8.0. Is there software cutoff for that in 8.5–onward?
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