Skunkworks PS-2 ADB Project — #32

Post #32 by Bunsen

Source Forum	68kMLA
Category	Peripherals
Post Date	Thu, 19 Apr 2012 - 12:58
Original URL	https://68kmla.org/bb/threads/skunkworks-ps-2-lt-gt-adb-project.25038/

Post

There are some small microcontrollers that are fast enough to do USB Host in software

And there are a number that have USB Host in hardware, too, with standard HID drivers.

Subject: SCSI for the 512K (or 128?)

seems like you can get ARM Cortexes for under $2 in single quantities these days. Add a handful of bucks for one with lots of built in I/O.
Lots of potentially useful clues in this thread:

http://forums.parallaxinc.com/forums/default.aspx?f=25&m=426250

the latest 32-bit line-up from NXP / ARM Cortex range. / basic 8K/8K 50MHz version / only $1.31 in 100 quantities ($1.76 one off), and only slightly more for 32K Flash versions. What am I doing even thinking about 8-bit'rs? /
Then there was the LPC1343 with built in USB MSC and HID capabilities! Ok, these weren't under $2, but around $5, which is what I pay just for an FT232R anyway. /

A free development environment exists based on the Eclipse IDE.

Click to expand...

It's the ADB side you need to figure out

I quite agree. Everything else - PS/2, USB HID etc, is both fully documented and available ready-rolled as open source code, or indeed in hardware. Get one or more micros talking to the Mac first, and then worry about the downstream side.