Marko Mäkelä wrote: > Dear Robert, > > I don't know of any USB related project for the Commodores. But I don't > think it's impossible; one could possibly find enough information in the > USB driver source code of Linux or BSD systems, even if the relevant > standard documents cannot be obtained at a reasonable cost. Let's see if > anyone on the cbm-hackers list warms up for this idea. > I had a project just like that going for a while, but it never got finished. Mostly because the XM1541 interface provides most of the features I was looking for at a much more attractive price tag. If anyone's still interested in picking up where I left off, I'll be happy to hand over the materials I have so far. A good place to start is to have a look at Cypress Semiconductors EZ-USB chips (http://www.cypress.com/usb/fullspeed/ezusb.html). They handle just about everything concerning the USB protocol on-chip, and in addition contains an 8051-compatible microcontroller, complete with lots of I/O ports, timers, interrupt controller, UART, an I2C controller, etc. Loads of nice stuff in a single chip in other words. All for the very competitive price of ~$7 in single quantities IIRC. Another cool feature is that it's able to bootstrap the 8051 over the USB bus, so you don't need any PROM's on board. -- Christer Palm Message was sent through the cbm-hackers mailing list
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