Supported operating systems for the following software: Windows 98SE/ME/2000/XP/Vista/W7 64/32.

# USB DRIVERS for PRESTO

ASIX_PRESTO_USB_DRIVERS_2009-02-06.ZIP (ZIP archive, 885 186 B)

D2XX drivers by FTDI modified to support PRESTO programmer.

## Installation

Install these drivers BEFORE first installation of UP v.2.0 or higher!

1. Download and unzip this archive to separate directory.
2. Connect PRESTO to USB.
3. New hardware will be recognized. When asked for drivers, browse to the directory with PRESTO USB drivers.
4. After succesfull installation, green LED (On-LINE) will be turned on.
5. Then install or upgrade UP.

Note: When upgrading UP or other programs for PRESTO, it is not necessary to upgrade also the USB drivers if these drivers were already installed and work well.

## Old versions

ASIX_PRESTO_USB_DRIVERS_2004-04-06.ZIP (ZIP archive, 258 570 B) - recommended for Windows98 users

## Troubleshooting - Windows 98

Users of Windows 98 can have problems with new drivers - Windows 98 complains about missing .CAT files during installation. There are two solutions available:

1) Use the older drivers: ASIX_PRESTO_USB_DRIVERS_2004-04-06

2) The problem is described on the FTDI Knowledgebase page:

> Windows 98 complains about missing .CAT files

> Files with the .cat extension are signature files issued by Microsoft that indicate a device driver is WHQL certified. If a driver is not certified, there will be no .cat files available.

> When installing drivers in Windows 98 or Windows ME, the user is prompted to locate the .cat files if the operating system cannot find them. If the driver is not certified but you wish to install it anyway, the files may be skipped by clicking the "Skip" button.