Re: USB-to-C64 ? (fwd)

From: Christer Palm (
Date: 2001-11-27 18:04:02

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 


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

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