The SIO2USB Interface is a peripheral device that can be attached to
an ATARI 8-bit computer using the SIO-Bus.
It emulates one or more ATARI floppy drive(s) and
does not require any special drivers or operating-systems; it is fully
compatible with all ATARI DOS systems and extensions.
Because the device is connected to the SIO-Bus, it is not necessary
to open or modify the ATARI.
The device is powered by the SIO-Bus and does not need an external power adapter.
The data are stored on standard USB mass storage devices (USB FLASH Drives)
as ATARI-Imagefiles (ATR on a standard FAT file system).
Creation, selection and deletion of Imagefiles can be done either by
using the built-in keys on the device and the LC-Display or by using a
configuration program (included in the distribution package) from the ATARI.
It is NOT necessary to own or run a PC or Mac to operate the SIO2USB
All necessary operations can be done either at the device itself or from the ATARI.
As an alternative, a PC or Mac can be used to exchange Imagefiles from/to the
USB FLASH Drive or to create backup copies.
By using the internal Real-Time Clock, each modification (write access from the ATARI)
on the Imagefile will update the current date and time information on the Imagefile.
This permits one to find the most recently changed Imagesfile with the same name in the file system.
Dates and times are also available for the ATARI and can be used by proprietary
programs or by ATARI DOS systems that support date and time.
The internal SIO2USB Software (Firmware) can be updated by the user
from within the ATARI without a PC or Mac.
We will publish Imagefiles for Firmware updates on the SIO2USB website
which can be downloaded and copied to the USB FLASH Drive or sent on an ATARI
5 1/4" disk.
The Firmware update is done from within the ATARI WITHOUT any special
programming device or additional personal computer.
The SIO2USB-Interface allows you to operate an ATARI computer
with virtual floppy drive(s) without using a REAL floppy drive
or any PC with SIO2PC software and interface. Therefore it is a
light-weight alternative for real floppy drives or SIO2PC + PC/MAC
In addition, other SIO devices (real floppy, SIO2PC, tape-drive or
printer) can be used with SIO2USB together at the same time on the SIO-Bus.
Can boot an ATARI 8-bit computer without physical floppy drive
Emulation of up to 3 (virtual) Disk drives simultaneously
Easily to attach to the SIO port, no modification of computer necessary
Mixed operation of real floppy and SIO2USB possible
Fully compatible with all ATARI DOS and OS and all ATARI-compatible extensions
Storage of ATARI-Imagefiles on standard USB FLASH Drives
Selection of the Imagefiles by built-in keys / LC-display or configuration program on the ATARI
Built-in Real Time Clock (RTC)
Power supply for the device and USB FLASH drive from SIO-Bus
Updated SIO2USB firmware can be applied from within the ATARI (no additional device or computer required)
Updates available via Internet (USB FLASH drive) or direct from the ATARI (real Disk drive)
The SIO2USB-Interface will only be built by
If you are interested to buy a SIO2USB-Interface, please send us a non-binding
All pre-orders will be collected. When we have enough pre-orders, you will receive a binding
offer from us. Then you have two weeks time to decide to accept our offer.
The price depends on the amount of incoming pre-orders.
Estimated Price / Distribution package
The SIO2USB Interface will be available only as fully built-up device in a plastic case
and is directly usable (Plug&Play).
SIO2USB-Interface ready to use with backlighted display and installed SIO-cable
Tested USB FLASH drive
Configuration program and software tools for the ATARI
A USB FLASH Drive is supplied with each SIO2USB containing all
configuration programs, tools and documentation, so you can start immediately.
The display is a special low-power backlight LCD to avoid too high load for the
ATARI computer via the SIO-Bus.
The price for one SIO2USB device including a USB FLASH drive will be (based on the number of pre-orders)
between 130 - 150 euro.
The more pre-orders we get, the lower the price will be.
Note: The price covers just our expenses, we don't earn any money with SIO2USB