1. Installation of Cloudy

Variant 1: Installing Cloudy into a CPU socket: In case the mainboard 
of your ST has a socket for the CPU, the Cloudy can be placed into that 
socket. Be sure that the "<" marking on the Cloudy and the corresponding 
marking on the mainboard and/or socket are on the same side. 
Then carefully push the Cloudy into the socket. Continue with the 
section wiring below.

Variant 2: Soldering the Cloudy on top of the CPU: As shown in the photo, 
shorten 32 pins on one side of the Cloudy using a small wire cutter. This 
allows you to place the Cloudy directly on top of the 68000 CPU. Be sure 
that the notch on the CPU and the "<" marking on the Cloudy are on the same 
side and that all pins are aligned. Temporarily install the provided DIL64 
socket on top of the Cloudy. This will ensure that the pins of the Cloudy 
will remain fixed during soldering. Solder all 64 pins of the Cloudy to the 
respective pins on the CPU. Afterwards check that there is no solder bridge 
between adjacent pins. You can now remove the DIL64 socket again. 

Wiring: Use the provided jumper cables to connect Cloudy and Lightning ST: 
Cloudy P1 => Lightning ST P11, Cloudy P2 => Lightning ST P12. If you want 
to be able to easily switch between the TOS ROMs on the Cloudy board, wire 
a switch (SPST) between Cloudy P3 and P4. Otherwise you can use the provided 
jumper.

Lightning ST: Push the Lightning ST into the sockets of the Cloudy, again 
making sure that everything is correctly aligned. Continue with the 
Lightning ST installation as described in its  separate README. In particular 
the ROM2 connection from the mainboard to the Lightning ST is required 
for the Cloudy to function.

2. Flashing the Cloudy ROMs

Cloudy comes with the capacity to store two TOS versions. Supported TOS 
versions are EmuTOS 256k, Atari TOS 1.00 ? 1.04 (and derivatives thereof, 
e.g. KAOS) and Atari TOS 2.06.

Note about TOS 1.0x support: For the Cloudy to be able to support 
TOS 1.00 - 1.04, your ST mainboard needs to be able to run from a set of 
two ROMs. If your ST currently uses six (not two) TOS ROMs, many 
mainboards can be reconfigured for two ROMs, making it possible to use 
TOS 1.0x in the Cloudy. Often, to configure the mainboard for two ROMs just 
three solder bridges on the mainboard have to be changed from the setting 
marked "256k" to the setting "1M". However, the exact steps depend on the 
mainboard revision. We intend to provide links to reconfiguration guides 
for common mainboard revisions in our Wiki. Until then, if you are unsure, 
please feel free to ask us. Please provide the exact mainboard type 
(Cxxxxxx, Rev. X). Be aware that EmuTOS 256k and TOS 2.06 are always supported, 
regardless of mainboard type and configuration.

Cloudy slot 1 = jumper set between P3/P4 or switch closed: EmuTOS. 
EmuTOS is a free operating system that features functionality similar to TOS. 
EmuTOS is free Software, so it is better than TOS in several ways: It is 
improved, to support more features and more hardware than Atari TOS. 
For example, it already includes a hard disk driver that supports the IDE port 
of the Lightning ST. Furthermore, EmuTOS is actively developed and supported: 
https://emutos.sourceforge.io/. 
While EmuTOS in slot 1 also serves as a recovery OS (in case the OS in 
slot 2 is unable to boot), we encourage you not see it merely as a backup 
solution but as the fully featured OS which it is.

Cloudy slot 2 = jumper removed between P3/P4 or switch open: 
User flashable (but also programmed with EmuTOS at delivery). This slot 
can be flashed by you with any of the supported TOS versions (see above). 
The necessary software FLASHROM.TTP is provided.

To flash a new TOS image: Boot into slot 2 (jumper removed/switch open). 
When starting FLASHROM.TTP, the Desktop will ask you to enter the file name 
of the TOS image. On most TOS versions, you can also simply drag and drop the 
icon of the TOS image file onto the icon of FLASHROM.TTP. FLASHROM.TTP will ask 
you once for confirmation by pressing "Y". Then it will flash the provided 
TOS image into slot 2. It is normal for the screen to flicker during flashing. 
Afterwards your ST will reboot into the newly flashed TOS.

3. Recovery

In case your TOS in slot 2 does not work, e.g. after flashing a corrupted 
TOS image: Boot into EmuTOS in slot 1 (jumper set/switch closed). 
Run FLASHROM.TTP as described above. It will automatically detect that it 
is running in recovery mode and will ask you to remove the jumper (or flip 
the switch) while the computer is on. FLASHROM.TTP will then re-flash slot 2 
and will afterwards boot into the newly flashed TOS in slot 2. 
Slot 1 will never be overwritten and can therefore always be used for recovery 
when needed.

Note: The jumper on the Cloudy might be hard to reach since it is located 
underneath the Lightning ST. You might want to tie a small piece of yarn 
around the jumper to use it as a strap for pulling the jumper when FLASHROM.TTP 
tells you to do so.

For more information take a look here: 

http://wiki.newtosworld.de/index.php?title=Cloudy

17th december 2019