FTDI Chip - Legacy peripherals to USB 
Specialists in converting legacy peripherals to Universal Serial Bus (USB). We offer the easiest route to USB migration by combining USB-Serial (USB-RS232) and USB-FIFO silicon solutions with our ready-to-go royalty free USB drivers. FTDI's "total" solutions offer reduced development and debug costs and a fast time to market.
Future Technology Devices International Ltd
Circuit Designs - Wolfgang Wieser
digital circuits, programmable logic devices and microcontrollers, see the programmable devices section. Furthermore, there are boards which connect to a PC via the USB port (USB8bit, USB-FX2) which supersede my very old parallel port card (Latch16bit).
Universal Serial Bus General Purpose Device Controller
The TUSB3210 is a USB-based controller targeted as a general-purpose MCU with GPIO. The TUSB3210 has 8K × 8 RAM space for application development. A ROM-based version of the TUSB3210 has 8K × 8 ROM space for predeveloped customer-specific production applications.
TUSB3410 The TUSB3410 is a full-speed peripheral with programmable USB-to-Serial Bridge,
TUSB6250 TUSB6250 is a high-speed peripheral with Programmable USB-to-IDE Bridge,
TUSB2136 TUSB2136 is a compound 2-port with general purpose 8052 MCU
.. build my own USB to RS232 FT8U232AM
FTDI Home Page: "Welcome to FTDI - specialists in converting legacy peripherals to Universal Serial Bus ( USB ). We offer the easiest route to USB migration by combining USB Serial ( USB RS232 ) and USB FIFO silicon solutions with our ready-to-go royalty free USB drivers. FTDI's 'total' solutions offer reduced development and debug costs and a fast time to market"
USB Interface to 80535 Group:sci.electronics
this may work:
http://www.pccompci.com/usb-converter/usb-converter.html
just use the lines going to rxd and txd os rs232(serial)
to your 80535 rxd txd serial port lines.
http://www.hardwarebook.net/ for rs232 pin details.
The CREATE USB Interface
" To simplify this process of connecting the real world to the virtual, the CUI provides the necessary electronics to capture sensor input or control actuator output. The CUI comes with a USB port, a power LED, a Reset switch, a Programming switch, and a prototyping area. At the heart of the board is the PIC18F4550, a versatile microcontroller made by Microchip Technologies, Inc. The PIC18F4550 features thirteen A/D inputs, eighteen general I/O ports, and an efficient RISC-like instruction set. ...."
Dan Overholt U.C. Santa Barbara
Center for Research in Electronic Art Technology
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