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LA2YUA

6502
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    8
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  • Website URL
    http://longview.be

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  • Gender
    Male
  • Location
    Norway

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  • OCCUPATION
    Electronics Engineer
  1. Just finished putting my little assembly together, working great so far using the pre-assembled kit. Thanks for all the work you guys put into this project! Decided to put the Pi 4 in a Hammond enclosure and put an external SCSI 2 connector on the back, kind of a quick and dirty job with the mini-mill and some file-work. Power input is 12 V using a little 3 A DC/DC converter. The Pi is installed on top of a stack of thermal pads, so it's able to stay at around 30 degrees above ambient. I added some heat sinks to the SCSI transceivers, but I may end up replacing those
  2. So I got the FPGA today, my 442 system is now working! Some fiddling with getting the right 3.2 version of Pro Tools, and had to set the serial ports to Compatible mode to make it launch (this was at least documented in the release notes as a IIfx specific issue). Not sure how I can get any kind of effects added (like a dynamics processor, or an equalizer)? And if anyone knows of tools to convert whatever audio format PT3 uses to/from anything modern that would be cool? Also posted my writeup on the NuBus card: http://longview.be/digidesign-pro-logic-audi
  3. No those are probably fine - I've been using a CentreCOM MX20 (fat version of the AT-210 slimline type) and those are built like bricks. The real cheaply built "new" one I got is this: https://www.ebay.com/itm/112100388678 Taking a look at the pictures, what I got only vaguely looks like the picture - there could be some variation in what you actually get. It's a new PCB, but definitely an old controller chip that's probably been desoldered from something else, no transformer for the AUI side, the switches on the front literally weren't hooked up to anything. Ho
  4. Good job! I'm working on making my own and your drawing was super helpful and easy to follow, definitely saved me some head-scratching wrt. pinouts and what signals are important. I'm putting my transceiver inside the computer case (along with a gigabit fiber-optic media converter), so I just modified the transceiver to use 5 V directly. In case anyone's wondering, there are some "new" white-cased AUI transceivers available on eBay for around $10. I got one, and it worked, but it's a very cheap construction, and definitely built using recycled parts.
  5. Mine was labelled 01018 (8 or B ) R03 5A87. It would definitely be nice to have a second dump as reference (seems like it should be the same contents from the labelling). I have some blank XC17128s I could put that in if my old SPROM is dead for some reason. I have a Xilinx HW-130 on loan but it refuses to do the 1736A, so that's why I had to manually dump it with a logic analyzer (and why I'm not entirely confident it's correct). I'll be posting a separate writeup on the audio card once I actually get it working, but here's the 27C64 dump I did. It appears bl
  6. I've been working on getting a PT setup working myself, using a set of 442 Audio Card (with the dual 56k DSPs, no piggyback card) & the 442 I/O box. The 442 Audio Card uses a few GALs/perhaps just PROMs (haven't checked), and an XC3030 FPGA. There's an XC1736A (not E/D) PROM in DIP-8 that contains the bitstream. There's also a 27C64 in PLCC that contains nothing but a declaration ROM. I'm stuck waiting for a new XC3030 FPGA since mine was broken (extremely warm, not doing anything), but since it's an FPGA it should just be a matter of installing a new one.
  7. According to the monitor you're running 183 kHz HSync and 15 Hz Vsync, that's nowhere near any kind of standard resolution. The clicking in the power supply could be a hiccup mode it goes into when overloaded - but that occurred when you swapped graphics card? My hunch is perhaps a shorted tantalum capacitor (that hasn't exploded yet due to the power supply limiting the power). It could be bad PRAM settings causing issues? Could also be your power supply is very marginal and causing glitches all over the place, maybe check the voltages before troubleshooting furthe
  8. So I got hold of a RasterOps Paintboard Lightning for my Mac IIfx. On startup, the card displays a full colour bootsplash, then goes black. Looking at the outputs with a scope, it's outputting 1027x768@75 Hz, with absolutely no activity on the video lines. I got it working by making my old Toby card the primary monitor, using that to set the card to the highest colour mode (24 bit), then I could pull the Toby card, and the PaintBoard would start up in the full colour mode and display video. If I set it to e.g. 256 colour mode or any greyscale/mono mode, then i
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