Atari 1040 STFM refurb and Gotek upgrade

... or another machine goes to Norway

Intro

Master level! I've gotta work more and level up quickly :D

/Intro

I've decided that I'll finally start working on Atari ST machines that I've ordered some time ago. Most of the machines had broken cases or were severely yellowed but that is a story for another blog post.

Today, I have a short story about preparing an Atari for Alexander from Norway. He actually made me start working on STs ;)

Since Alexander ordered quite a few machines in the past I decided that I'll pick a best looking ST and arm it with few upgrades.
That was actually the only unit with a NOT cracked case

Here it is.

It was a bit dirty but cleaning was a simple task ... if you know how to do it obviously ;)


It had few scratches on a top cover but that was smoothened with a sandpaper later on.


Alexander asked me if I could install UK TOS in it. Obviously, that was not a problem. However, I didn't have UK keyboard. All 23 STs that I had, came with German TOS and keys so I've ended up buying a whole unit only to get a UK keyboard :D

In order to clean it properly, disassembly was needed.

... and here is the result.

I wasn't really pleased with slightly yellowed keycaps so I did another round of whitening and that sorted out the problem.

GOTEK

In the meantime, I've started working on a GOTEK drive. I've flashed an awesome FlashFloppy firmware to it.
First tests.


There was a small problem though ...


... unfortunately a ribbon cable was a bit too short ... grrrr ....

I've decided that I'll remove original connector and solder in a standard pin header instead.




Shortly after that, I realized that power supply cable was also too short ... grrrr
I've ended up extending that one as well.

That finished Gotek mod. Below is a short video with Gotek running .

Video sync fix

In STFM series, there is a slight problem with video sync on modern TVs.
Atari simply loses sync after a reset which results in an unstable video output. There is a simple fix (Yay ! Internet FTW !). A resistor has to be soldered between chip pins near modulator.
I've soldered it on a bottom side of a PCB.


UK TOS

The final job was to put UK TOS 1.04 inside.
That was achieved by flashing and fitting two flashroms - Winbond W27C010.
These flash chips are not exactly pin-compatible - each of 'em has four more pins.


That is not a problem but requires running few external wires.


Finale

Below few pics of a finished work.






That's it. Job is done and new owner is very happy (AFAIK ;P)

ps. Atari also received a 4MB RAM upgrade but I forgot to take pics of that mod ;)

Drygol

Chaos is your redemption .... better run .... better hide

I come from Internetz :>