For example, one of the first questions that will arise to new SF3 owners is:
How can I update my SF3 to the very last version?
Ok, like all developments, and SF3 is still on the very middle of it, there will be some transitional/test updates and then the definitive/tested updates. I will put here on Enterprise Forever only the definitive updates, and will explain what has changed on them. Usually some fixings or additions to the code of the Arm processor.
Every SF3 comes with a DFU cable, an "unusual" lead with a male USB connector on every end:
Don't keep it in the bottom of a drawer! you will need it very often to reveal new and fantastic functions.
The ideal way to update the SF3 is connecting it to a Win PC, but some users have been able to upgrade on Apple or Linux computers.
To start I will describe only the Win way.
First
download and install the linked DfuSeDemo program. Also, create a new directory where you will store the DFU update files. Download the last DFU update and store it there.
With the SF3 disconnected from the Enterprise, change the position of the DFU switch on it to the upper position.
Then connect one end of the DFU cable to the PC and the other end on the "FAT32" USB port on the SF3(at the right of the Wifi antenna and over the OLED screen:
The PC will then recognise the new hardware and will install its driver.
Open the DfuSeDemo program:
If the middle list is filled like on the picture, the SF3 has been recognized and the update zone has been read. If it remains in white, try to remove and re-connect the DFu cable from the PC.
Now, you only have to use the two marked buttons in red, first Choose, and select the DFU file that you have previously downloaded and stored on an special directory.
Once done the little square near the two buttons will now show something like "00 ST...", and the "Upgrade" button now will be highlighted.
Click on the "Upgrade" button, a warning window will now appear, but click on "Yes". One green bar at the bottom will grow making two passes, and at the end it will show "
Target 00: Upgrade successful !".
Now you can click the "Quit" button to exit the program.
On almost all upgrades this will be all, the SF3 will be ready to be connected again to the Enterprise with the adapter. Remember to put the DFU switch on the down position.
But on some circumstances, the CPLD chip firmware needs to be modified. On it are the main adaptations to each computer, so every update is critical.
It also happens that the user could need to re-program the SF3 to use it on other family of computers, CPC, MSX, PCW or others to come.
Then, after the DFU update, and still with the SF3 connected to the PC, move the DFU switch to the down position and press the Reset button on the SF3, at the left side of the card.
The OLED screen will briefly show the target computer DFU update installed, on our case "EP", the actual voltage the PC provides, and then "Missing Z80 upd".
From now on, please only continue if it has been recommended on the most recent DFU update.
Now press the middle button below the OLED screen, and the CPLD will be internally updated with an attached file on the DFU.
The screen will show "UPDATE" and once done "READY". Now the SF3 can be unplugged from the PC and re-installed on the Enterprise with the adapter.
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