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About Trash80toHP_Mini

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    Bermuda Triangle, NC, USA

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  1. Trash80toHP_Mini

    Has anybody gotten a SCSI2SD v5.5 yet?

    That's a beautiful case. How close is the color to 100 series a/o Duo Charcoal gray? If printed, what's the spec on the filament used?
  2. This vid took me back down memory lane to applefritter/hacks in the day. There are some very lovely hacks, creative ideas with great craftsmanship. He has me wondering what to do with a dead HDD in terms of hacking a laser light show generated under the clear HDD cover inside @maceffects clear SE/30 case.
  3. Trash80toHP_Mini

    Compact Mac Test Stand

    Beautiful piece of work with some very creative problem solving solutions in that layout. Might I suggest adding a clear plexi shroud hinged to backside the A/B wing so the fan will properly cool its very hot components and the PSU? It would also protect and insulate the A/B's high voltage components from being being dirtied by fingerprints.
  4. Trash80toHP_Mini

    Powerbook 100 Battery Rebuild

    Can't believe I missed this project! Gotta read it through carefully. Right off the bat, I'm wondering if there might be a difference in the way lead/acid appears to the sensor mechanism. Second thought would be hacking away at my (oh so very dead) VST ThinPack that feeds power to the power plug. Given enough cells to match the power adapter input, mimicking the ThinPack circuitry and hotwiring to the power input plug from the jumpered power plug assy and the disconnected from logic board battery bay contacts, a better than original setup might be achieved? Such would circumvent the battery bay sensing setup?
  5. Trash80toHP_Mini

    3D Print Replica HD 20 SC Enclosure?

    Good idea there, modeling the existing support structure for a 5.25 inch drive for printing would be much better. Very low cost adapters to the 3.5 inch form factor are readily available a 5.25 inch structure would support CD and removable cartridge mechanisms of every sort. edit: That's the AppleCD SC mechanism support structuret, the only one for which I've posted pics, but they serve the purpose. Standoff from bottom is less for the HDD version as the CD case is about that much taller. Lack of depth of the new design would put DB-25 based passthru connector web next door in the PSU backplane, fan (unlikely, but if needed) can probably remain in the same spot. Gotta take some measurements. I'm seeing a lump-on-a-rope of the type used for IDE-USB-SATA adapters clipping into its molded home, positioning its standard power cord plug receptacle on the backplane
  6. Trash80toHP_Mini

    3D Print Replica HD 20 SC Enclosure?

    HRMMM . . . If you can print split sections of top and bottom for unification with ABS cement, mechanical fasteners and having a honeycomb support rib grid inside you may have modeled mold parts suitable for investment casting production? The seam lines between halves could be cleaned up giving a unified mold pattern. I've experimented with producing large panels using a similar process. Laying up an ABS glop of dissolved pipe connectors on a modeling clay form for eventual fiberglas reinforcement. I've an unlimited supply using waste from hull layup from a yacht builder I know for FRP parts. I came up with what's probably the ugliest CRT case quarter panel extant. Reproducing smaller case sections using investment plaster negative molds (water soluble after casting a part) from your model should be investigated. If you purposely sectionalize a positive mold form with thin extensions along every rounded edge for sanding smooth afterward, it may also be possible to cast a multi-part mold reusable until it fails or inevitably wears out. Dunno, gotta think it over outside my stream of drivel process. Time to make more coffee.
  7. Trash80toHP_Mini

    3D Print Replica HD 20 SC Enclosure?

    LOL! I was thinking about searching this topic to check in just this afternoon! I somehow missed your January update. FABULOUS! I remember seeing info on SCSI converters for non-HDD peripherals that weren't stupidly expensive (+-$70?) a while back. Your new case with opening to support a slotloader laptop CD would kill! A trayloader version as in my pic on the first page would be adapter free/economical by comparison. That pic may be of a caddy loader though, don't recall offhand. My AppleCD SC looks really homely and very dated by comparison to your case. There's no need for the front controls to use it as a CD Player in a Stereo setup as was the case in the day. Never mind the woodworker comparison, there's no way to do it in less time without setting up and using router jigs or a router table. With the latter you'd still come up short with radiused ends on every groove looking nowhere near Snow White correct. You rock, my man!
  8. Ran across a very limited capability TTL RGBI to analog RGB converter on eBay. https://gglabs.us/node/2063 That has me wondering just how complicated it might be to bodge up a real kluge of a setup for examining early Mac B&W VidCard outputs (from those infuriating DE-9 Connectors) in the hopes of coming up with a general purpose converter capable of supporting the mish-mosh of proprietary standards. Wondering if TTL to HDMI conversion would be the way to go? It seems to me that avoiding the necessity of DAC component would be a "good thing." This is way beyond my pay grade/skill set, just wondering if another pair of eyeballs might see a path to sampling raw input from B&W (single bit ) output from a DE-9 connector. ___________________________________________________________________ To get things rolling onto a tangent right off the bat: I have a couple of Radius TPD cards with simple coaxial analog connections and assuming the early FPD cards are of the same ilk, an analog to digital conversion pops into mind. For that we have the output specs in terms of freqs and resolutions for a lot of fairly useless cards out there in the wilds. Analog to Digital for that seems like a simple project by comparison to the one in the title, go figure. Getting the TPD card up and running somewhat acceptably on one of my Analog Multisync Displays was a massive PITA. An adapter going from single bit analog to digital (DVI or HDMI) is the only way I see of getting these cards up and running in any practical way. Sorry about the stream of confused thoughts/modicum of consciousness.
  9. Trash80toHP_Mini

    The biggest haul I’ve ever made.

    Very nice! Such a generous contribution to the community by his heirs in his honor.
  10. While on the subject of cables: an S-Video cable makes a great ADB cable, but an ADB cable makes an awful S-Video cable for the very much the same reasons.
  11. Trash80toHP_Mini

    IIsi video distortion before and after recap

    That was my sneaking suspicion, but thought I'd mention it because moving video memory to a RAM disk sounded like it might be mapped outside the buffered Meg. I wonder if one of the (245) buffers might be glitchy? I'd think a bad trace would give solid line artifacts? Try taking a a screen shot to see if the artifacts are in video memory or are introduced on the way out through the RAMDAC to the port. If the screen shot comes up clean, it's not RAM.
  12. Trash80toHP_Mini

    How to configure a macintosh plus with an external HD 20 SCSI

    Offhand, I don't recall Seagate having been an OEM for Apple in that era? That's their ST-225N (for SCSI version) and there's no Apple logo to be seen on the top plate. Might it have been a replacement drive? If that might be the case, check the drive for SIP termination packs, a modder might have set it as end of chain only in that manner? Did your SE boot from it and if so, with or without external termination? SCSI Voodoo would be the case of SCSI "working well enough" when configured out of spec, as in an incorrect termination config when it really shouldn't be "working well enough" or even at all.
  13. Trash80toHP_Mini

    IIsi video distortion before and after recap

    Forgot to mention taking matching pics of the solder side of the board. First thing I noticed is that grunge between pins 16 and 17 on UF7, if it's at all conductive that might be your problem. If we don't find something in the traces and you're comfortable with SMT Memory IC upgrade, I'd do that first. But I'm a technological knuckledragger and when all you have is a club . . . uniserver and I were talking about IIsi memory and he just went ahead, did the upgrade and it just worked. Threads are in hacks, IC info's in there. The upgrade may just work for fixing your problem. @trag & @Gorgonops does that look like a memory fault issue to you?
  14. Trash80toHP_Mini

    IIsi video distortion before and after recap

    Looks like a memory fault to me as well. IIRC there's a way to move video memory to another memory block other than its dedicated, buffered 1MB block . . . yep, LEM. Dunno if it does what I'm thinking it does, but if you can move the Vampire's fangs to a different memory block you might be able to isolate your problem to the RAM, buffers a/o subset of traces and logic used in video. Having moved video memory to a RAM disk in system memory, if the wonkiness disappear you may have a good start? Dunno, but if you do isolate it to bad RAM, you can replace the OEM ICs with a 4MB loadout. In terms of pictures, you're looking at the diagonal section of the board from backplane to front right (FDD) corner. Close details of the 8 memory chips, 4 vertical buffers and the memory controller on the other side of them to start.
  15. Trash80toHP_Mini

    Major Score! 8600 with Sonnet CPU, 3DFX card, Etc

    That was known as fan fold paper once upon a . . . not a very descriptive moniker these days though.