Please select from the list below which TOS version and language you would like and let me know by adding a message on checkout.
ATARI 520 1040 STE AND MEGA STE COMPATIBLE ROMS UPGRADES
v1.06 – Available in Dutch, Spanish, French, German, Italian, English-UK and English-USA
v1.62 – Available in Czech, Dutch, French, German, Swedish, English-UK and English-USA
ATARI 520 1040 STFM, ST AND STF COMPATIBLE ROMS UPGRADES
v1.00 – Available in Czech, Danish, Dutch, French, German, German/Swiss, English-UK and English-USA
v1.02 – Available in Czech, Dutch, French, Swedish, German, German/Swiss, English-UK and English-USA
v1.04 – Available in Czech, Dutch, Spanish, French, Netherlands, German, German/Swiss, Swedish, English-UK and English-USA
If you have an Atari STE or TT, please see my other auctions for more suitable ROMS as this EPROM upgrade is not compatible with the Atari STE or TT.
Instructions – please read before buying!
These kits are supplied as 2x 32-PIN EPROMS and not the original 28-pin EPROMS due to these 28-pin EPROMs now being unavailable to purchase. This does mean modification to some EPROM sockets for install in a standard Atari STF/STFM computer, but thankfully no modification to your motherboard! Please see instructions below – thanks to Exxos! Fitted at the risk of the buyer – these are, however, tried and tested instructions and must be followed to the letter.
It is noted that the EPROMs are 1mbit and are slightly longer than the TOS ROMSs. The original TOS ROMs were OTP (one time programmable) and have less pins than EPROMs. Some wiring is needed to adapt them for Atari ST use.
I use regular turn pin sockets for this upgrade. I find it makes things nice and neat. However, if you decide to use the sockets rather than doing all the wiring directly to the EPROM, then the ST metal shield will not seat correctly as the addition of the socket makes them too high to fit. So a small hole would have to be cut in the metal shield.
Please see the installation images for this auction for fitting instructions – stages 1, 2 and finished.
Please contact me if you are unsure which version is compatible with your system, and if you need help on installation.