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erichelgeson

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Posts posted by erichelgeson

  1. I have LED, Berg power, and a few other minor updates done. Though have two questions before I put in the last prototype order:

     

    The floppy berg connector - I've seen conflicting #'s on the pitch - 2.5 and 2.54 - someone on discord measured his and it was 2.54 so I'm going with that.

     

    I'm having trouble finding the right diodes on Mouser - the ones I've found for through hole are all huge(physically) and rated very high (hence the size) - If someone could help find an appropriate diode I'd appreciate it! It seems when searching for components you can get the wrong filter and never find them, then someone else looks and finds one you never saw :)

     

     

  2. 1 hour ago, jonpurdy said:

    separate from the regular RaSCSI web interface, correct

    Yes it's stand alone, after a few more people test it I'll open a PR for it.

     

    1 hour ago, jonpurdy said:

    "good first issue"

    For now just give it a spin and see what breaks or could be improved. Open an issue and if you can, fix it :)

  3. 37 minutes ago, ronan said:

    I hope everything was clear !

    It was - thanks! From my reading/learning that's how I thought it might work but glad to have someone with experience to chat with. If you are a Discord user you should jump on RaSCSI's discords (we talk about all things scsi, scuznet and ardscsino included)

  4. 1 minute ago, ronan said:

    enable/disable termination using a jumper

    Great! Ya I was testing yesterday with a zip(term enabled) -> apple cdrom -> rascsi (term enabled) and the chain wasn't working. Though in all likelihood your device will usually be the last.

     

    11 hours ago, ronan said:

    The board has some circuitry that automatically switches between these two sources, so for the end user it is really convenient.

    Could you explain this a bit more how this works? I'd like to add something similar to arscsino - but pretty new to hardware design. Thanks for the detailed blog post too!

  5. I've added some pre-build system images and utilities image to help bootstrap your RaSCSI experience. They should cover all SCSI Macs, let me know if there's a OS or utility you'd like prebuilt.

     

    https://macintoshgarden.org/apps/rascsi-68kmla-edition

     

    Also I've been working on a new version of the web interface and adding features such as download to iso (eg, give it a Macintosh garden link, it will download the file, create an HFS iso and mount it, easy way to get utilities on your Mac) and a bunch more stuff.

     

    https://github.com/erichelgeson/RaSCSI-web

  6. Very nice! Interesting to use the STM32 - You've probably seen the Arduino scsi thread which also uses a STM32 https://68kmla.org/forums/topic/61045-arduino-scsi-device-work-in-progress/ 

     

    What I'm struggling with is how to power it reliably - some have mentioned in that thread that their scsi bus for whatever reason does not supply a stable 5v. Also the Mac Plus does not supply term power. Would be interested to know what you're thinking on that point.

     

    How are you handling termination enable/disable?

     

    Will probably buy one because I cant help myself :)

     

  7. 5 hours ago, dragon_x said:

    how much it will cost? Is it possible shipping to Poland?

    Working on that now - international shipping will be more of course - I just haven't shipped a lot internationally. Cost will be determined on how I can source all the parts - have a spread sheet and working on it now.

     

    This weekend I added a floppy power port (though seems to be some conflicting info on if the pitch is 2.54 or 2.5 - though both would probably work), added activity LED pin out, moved the debug port, re-worked the mounting, made the board 1mm wider to not cut off silk screen. Will be testing a few of the power options before actually placing the orders here on non-TERMPOWR macs (like the plus.)

  8. 16 hours ago, Chopsticks said:

    check how much current the se/30 can provided on the scsi 5v termination line

    Please do and let me know - I guess all of my machines provide a good 5v - but if that's not common (and probably with 30 year old machines it varies) it would be a good idea to have a 5v line. An option is they do make molex to usb to provide 5v, but they're a bit hard to source. I'll look at the cost and layout.

     

    10 hours ago, Chopsticks said:

    also these bluepill boards can be overclocked a bit and I wonder if that would improve the overall speed of scsi transfers?

    This is something I'll try this weekend, I've noticed the option, just never selected it.

     

    12 hours ago, nyankat said:

    Is this considered "ready to go"

    The scsi termination works well. Would just adding niceties to it now - eg: 5v Power, activity LED pin out, fix placement of debug pins (not enough room), likely remove fuse, remove 2nd hole as there is not enough room to use it, 3d print a bracket. But all that said it works well and I'm testing/using this rev (and ztto's rev) daily. If you're comfortable figuring out any issues you run into yourself 1.0-a is ok for you. If you want a set it and forget it - let me think on a few of these items - likely a 1.0-b will be happening soon.

     

    Since there is quite a bit of demand I'm considering doing an order of 100 (shipping really kills the deal for small batches) I do have 2 1.0-a's and 3 ztto v2's if anyone wants a blank now - with the expectation of feedback.

  9. 52 minutes ago, Challenger 1983 said:

    unfortunately this machine needs it in order to display an image

    My LCIII has never(removed it before I recapped it) had a pram battery in and works fine - maybe something else going on here?

     

    Agree I have a few sets of Xeno and they work fine for the machines I do have a battery in.

  10. 9 minutes ago, MrFahrenheit said:

    either software control it or have a switch on the board

    That's the plan! Right now it's jumpers but those get lost easily (but easily found too)

     

    9 hours ago, Chopsticks said:

    looked at your repo

    Still haven't had time to clean up and push everything - click watch on github and you'll be the first to know when I do :)

     

    There were some updates in V2 upstream ~3-4 months ago - it ran as is for me. I did change the vendor too, and added a config file if someone wished to override some settings - reflashing a firmware is quite a lot just to change settings, translated as best I could with google translate and some context.

     

    9 hours ago, Chopsticks said:

    not a lot of information on the Internet regarding the setup process

    Correct - I got through it as you did, but defiantly will be documented on my repo as well. Early in the project, lot going on!

     

    9 hours ago, Chopsticks said:

    pretty average read and write performance

    Yep! Not going to knock the socks off a scsi2sd or hdd - but will be a nice alternative. I've only tested in Norton so far - will test in that utility too and post some numbers.

  11. 38 minutes ago, quorten said:

    tweaks here and there to both the hardware and software that can add significant new and useful functionality. 

    That's one of the great advantages here - sure these projects are more immature (they're just starting out) - have a ton of potential. Amazing to see what others are already adding to RaSCSI (making a framebuffer capture device)

    39 minutes ago, quorten said:

    limiting scope

    Limiting scope and price - I think RaSCSI has a nice price point to (much higher) feature set - if you want to go that route. Here it's more on lower price points with a sole focus - something you could stick into each machine if you wanted. I'm sure you could add a lot more here - and maybe someone will, but for now I'm happy with the price/perf/features.

    41 minutes ago, quorten said:

    fairly new to PCB hardware design

    I had lots of help from ztto's existing work, @landoGriffin, and a bunch of youtube videos :)

  12. Prototypes arrived early! Unfortunately mouser order is still in transit so will just have to look at them till the parts arrive.

     

    Note I added a pin out to the upper right for hooking up a programmer (so I dont have to solder legs on and risk shorts anymore while debugging :)

     

    Will design/print an internal mount now that I have some holes to mount to this weekend.

     

    large.20201023_115512.jpg.71392d6f2187efff1c5b224bbf784072.jpg

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