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If you can tap into the raw pulses coming off a ball mouse's encoders, you can pipe them to the 512k's port. Implementation is left as an exercise for the reader.

This may be of interest to people hoping to run Localtalk at faster than 230kbps as well.  A few third party hardware makers back in the old days achieved around 1Mbps or better - Farallon and Asante are the names that come to mind.  Though if I recall, they both required you to use their...

Wow, I would definitely be down for a few of those.

@saybur - I'm curious to know what sort of file transfer speeds you're seeing to and from the SD drive over SCSI if you get a moment to test that

ants created a workaround for OAuth as part of his SE/30 Spotify player project  

@ZaneKaminski I went looking for your announcement on AF but couldn't find it.  Do you have a direct link?

One thing I'm having a lot of trouble finding is a generic LVDS/TTL LCD controller board, with the usual VGA/DVI/AV/etc inputs, that can do the following: Arbitrary resolutions and scan rates for the target LCD, programmable by the user not the seller Scaling or pixel-doubling If...

Are you using AVR assembler to target the SCSI bus, or Arduino code?

Hah!  No, not as yet.  It's a long pondered hack. I did just pull mine off the shelf and dismantle it to check out the available empty space, and now I can't get the #^@&#RU@#^% thing back together.  In search of clues, Google brought me right back here.

If you want to max out the transfer speed on that 5MB/s SCSI bus, the v6 SCSI2SD would do that for you. https://store.inertialcomputing.com/SCSI2SD-v6-p/scsi2sd-v6-revf.htm

:eek: No, no I had not.  I've never seen any driver board that cheap, let alone a configurable one. Unfortunately it appears to only support a number of common (ie, modern) resolutions.  I'm looking for something I can assign arbitrary resolutions and scan rates, and other timing details.

It'll fit the front bezel, but the neck is a couple of inches too long for the case and would stick out the back.

The earlier iPad displays do 1024x768 (XGA), which is exactly pixel-double the old Mac 512x342, and will work off cheap ebay driver boards.  And the iPad Mini version, at 7.9" diagonal, would fit neatly in the bezel.  You can pick up a kit with the driver board and panel for not too many...

Ooh.  What else can you change in this hidden menu? A board that can be arbitrarily reconfigured to run oddball displays would be hugely useful to me.

On that note, the obvious way around the issues associated with bitbanging the SCSI bus is to think like the Tiny SCSI Emulator, and use an actual SCSI PHY.  They're still floating around in the usual NOS back-channels, including much faster ones than the original 5380. Unfortunately David...

IMO, that idea of dedicating a core to bitbanging might make RaSCSI faster (assuming a multicore Pi-like).   There's a baremetal version of RaSCSI for the $5 Pi Zero, which provides storage emulation (SCSI to SD) only, as the other services such as networking are obviously not available...

It's RS-422, and yes, you can.  I know RS-232 can be bit-banged out the GPIO; I assume RS-422 wouldn't be substantially more difficult.  At worst one might need one or two extra ICs . It's possible to hive off one core of the quad-core CPU in the Pi, and some RAM, for an RTOS or baremetal code...

Folks, please try not to quote a 23-photo post just to add a one line comment.  Use the Reply To Post box instead of the Quote button. Edited.

What happens if you use a PDS video card, and disable the motherboard video?

Wow.  While I can appreciate the convenience and flexibility, my gut instinct is that replacing one connector with another that looks identical and is completely different electrically is just asking for trouble.