Suska-III-B at a glance:
The device has in principle three different function blocks:

The Firmware of the AVR microcontroller. Use an AVR programmer for firmware downloads. 
  The firmware is really stable so there is normally no necessity for firmware updates.
The operating system flash device: you can store different operating system images here.
  The is programmable with the aid of the AVR microcontroller.
The configware: there is a small flash device for storage of the configware. This brings
  the most functionality to Suska-III-B. The information stored in this flash defines the
  wiring of the field programmable gate array (FPGA). Writing new configuration to the flash
  is also possible using the AVR microcontroller. To transfer new functionality or updates
  to the flash there is a need to connect the AVR over a USB-UART to a personal computer.
  For more information refer to the firmware documentation.  

The SD card delivered together with Suska-III-B is bootable when using emuTos as operating 
system. It is bootable under TOS using an adequate driver like HDDRIVER. Exchange of
data between Suska and PC is rather simple using this SD card because it is TOS and Windows
compatible. Defective SD cards can be reinstalled using a clone tool (dd under Linux) from
the image file Suska-III-B-Drive-C.img.
Untder Linux this can be done for example like this: 
sudo dd if=Suska-III-B-Drive-C.img of=/dev/sdx where /dev/sdx should point to the inserted
SD card. Please be careful using disk dump (dd) if you are an unexperienced user. There
is a danger of data loss on your local drives.

Der actual FPGA core features 68K30L processor and virtual floppy support. Alternatively
there is a 68K00 and a 68K10 CPU. There are still investigations in the virtual floppy
drives. The drive space is located in the end of the SD card space. This feature is 
experimental and there is no guarantee of proper operation.

Tricks: 
if mouse or keyboard does not work properly then remove and reinsert the power supply.

TOS 2.06 has a great delay in the beginning of the boot process, emuTos does not. 
If the boot process fails the restart the machine (reset).

The key functionality is as follows:
Long key short keypress = Reset
Long key long keypress = On/Off
Long key short keypress = system (FPGA) reset (normally you do not need this feature).

Switch configuration:
S1/S2 relates to the screen resolution. extract of the Suska-III-B top level:
Configuration:
---- Config Switch 1 and 2 (1 is leftmost on the B board):          ----
----   "11" : reserved.                                             ----
----   "10" : 320x200x4 in 72Hz multisync compatible mode.          ----
----   "01" : 320x200x4 in 50/60Hz multisync compatible mode.       ----
----   "00" : Multisync 72Hz monochrome mode.                       ----

S3 to S6 are the operating system selectors as described in the related operating
system documentation.

experiment-S is the official website of this project. 
Der Configware version ist 2K23B prerelease.

Please feel free to contact us for further information.

Have fun with your Suska-III-B

wf-20231211