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That's a higher level function than I'm tackling - I'm just implementing a block transfer device driver; and anyone who includes NABUduino.h in their project can access it. If somebody built a boot ROM that included the relevant routines from NABUduino.c; the machine could boot from a SD card...

Oh, good - it arrived. I'm hoping to get some time this weekend to work on the SD card support for it...

OK, the board files are now up on GitHub, along with a simple demo program that demonstrates the mouse. Not currently implemented in the firmware or demo program is the SD card; that will be coming as soon as I get it done. https://github.com/bdurbrow/NABUduino

It needs to be 5v compatible (so, ATMega328 or LGT8F328P) with the standard Nano pinout. I've been using these of late: https://www.amazon.com/gp/product/B085W69SHJ/ That's an Amazon link, but they can also be found elsewhere (eBay, etc). They're relatively cheap, currently available, and run...

I can't quite tell from the photo - zoomed in it looks like there might be some capacitor juice on the PCB???

Looks like VERAULT has already positively responded; so just for general information --- You do have a proper temperature controlled (not wattage - an actual thermostat controller) iron, preferably a digital one with a bonded tip-and-heater cartridge (such as T-15 style tips, or a TS100 or...

I'm about to send 1.0c off to JLC; the difference being that I added a diode so that the Arduino doesn't try to back-feed the NABU 5v power from the USB connection when the NABU's power is turned off. 1.0b - what's in the NABU right this second - works OK, but I had to bodge in that diode onto...

A different adapter board would need to be made; as the standard one for the floppy controller occupies all four slots. When they did the floppy controller board, they reorganized the signals on the 30 pin connector; consequently you can't just plug a NABUduino into the floppy adapter's 30 pin...

Version 1.0b is now at JLC being manufactured; along with a couple of other boards. * Fixed a missing trace for the power connection to the prototyping areas. * Added indications to the prototyping areas of what pads were bussed together. * Switched to 74hct165 shift registers to eliminate a...

Several reasons; which may not apply to your design. 1) At the time it was cheaper. FWIW, right this second Digikey has over 12k of them in stock; and mouser has over 3.8k of them. 2) It's smaller and when I added the sync flop flop & its bus interface (the 74xxx125 in question) I was running...

Needs soldering, but...

Nice! I'm curious - where are you getting the boards manufactured? It's taking me about two weeks turnaround from JLC; this project seems to be moving faster than that? Re: Videos. FWIW, I would do like Adrian's Digital Basement, and have a short intro/title with music, and then none when you...

OK, they're off to JLC for manufacturing.

I changed the synchronization mechanism a little bit tonight; and ended up adding a chip (74hc125), using an inverter gate that was previously unused, and using an extra couple of pins on the Arduino... however, it'll be easier to program. Instead of having an interrupt on the Arduino trying to...

I have designed a PCB for putting an Arduino Nano on the NABU's expansion bus. It aims to provide several functions: * An SD card interface, with the Arduino handling the FAT formatting of the SD card; and making blocks available to the NABU's CPU from within raw disk images - I figure that a...